Pg 867 Ideas and Letters from practical men.
AMERICAN-MACHINIST-1917-Vol 46 No-20-May-17-Third-Section.
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AMERICAN MACHINIST
May 17, 1917pg 867

Cannon for Removing Rusted Bolts
By JOSEPH K. LONG
When repairing locomotives in `the shop, it is necessary to remove dozens of bolts, take frames
apart, cylinders off, etc. Some of these are in so tight that the cannot be driven out with a sledge,
and often they have to be drilled out.
The cannon, illustrated herewith, will take tight bolts out in a hurry. To the left of the diagram are
shown a top and sectional-' view of the device, the fuse hole, and Hj contrivance is a good thing
to have, and I have never heard of any one being hurt, as the necessary precautions are always
taken. We use smokeless powder from - to 1 in. deep in the cannon.

Roughing Out Blanking Dies
By A. C. K.
After reading Mr. Pusep's articles on "Roughing Out Blanking Dies," page 166, I cannot help but
submit my way, which I consider much easier and quicker. To use the punch he describes, it is
necessary to draw a model line, then a line as a guide for the punch, which takes considerable
time on a die that has an irregular outline. To make a punch that will eliminate the drawing of a
second line, I put a piece of drill rod, 0.015 in. larger than the drill I decide to use, in a spring
chuck in the lathe and with a lathe tool or graver form a fine point in the center; also a sharp
outer edge, as shown at A. Harden and draw, and it is ready for use.
After drawing the blank outline on the die block, I put the sharp edge of the punch on the line.
and tap
a
CANNON FOR REMOVING RUSTED BOLT        
the depression at the bottom.        The plungers are 16 in less        
in diameter than the bore of the cannon, which is 24 in.        
Paper is wrapped around the plunger to  make it air-                        ij(!IIlIi!h        B
tight.                        
The plunger with the reduced-size end is used where                
a bolt is broken off flush with the frame.        The diameter        
is such that it will enter the hole when the explosion takes        e
place and loosen the bolt.        After it is once started, the        THE SPACING CENTER PUNCH
AND DRIFT
bolt comes out easily.        The flat end plunger is used where        
the ends of a bolt protrude.        Care must be taken when        lightly, which leaves a center
punch mark and circle to
using this outfit to see that the plunger, when set in on        which I set my punch for the next hole,
as shown at B.
top of the powder, is tight against the offending bolt.        After drilling, there is a web left between
the holes,
This is easily done by driving a wedge under the cannon,        to remove this I make a drift from
drill rod twice the
but it must be set squarely.        No tamping is necessary, as        diameter of the drill used
minus 0.015 in. ; file or mill
the paper wrapped round the plunger answers the pur-        it on two sides to 0.010 in thinner
than the drill, round
pose        the other two sides to approximate the drill radius, put
It is best to use this cannon during the noon hour,        a slight concave in the end, as shown at
C, harden and
en there are not so many men in the shop, and to put        draw, and it is ready to use.
vy blocking around it and on top of the bolt) so that        To remove, or rather separate, the pieces
and at the
bolt will not fly or tlr cannon do any injury.        The        same time remove the web, drive the drift
through the
using the "gun" shouiu have a helper who will keep        perforated places and the piece will
come out and -leave
ry one -way while the cannon is doing its work-c , This        0.0125 in for finishing•
May 17, 1917'        .. AMERICAN 1MMACHINIS.T        Si'
An adjustable stop, not shown, is secured to the planed surface Q by four capscrews. The
machined recesses
serve to seat the shearing blades and insure them against
side motion. An enlarged view S shows the round-bottomed cutting groove T of the shearing
blades, which are identical for both the upper and the lower shears. Two sets of shearing
blades were made with this punch and die, one set each for shearing 1-in. and fin, stock, the
dimensions of the various radii being given.
In action the punch and die work as follows: The bar stock is inserted through the elongated
slot P into the cutting groove T and along the clearance groove U till it comes in contact with the
adjusted stop, when the punch, descending, shears off the stock. It takes two men to operate
this punch and die successfully--a helper to feed the bar stock, and the punch-press operator
to trip the press and remove the sheared rods.
Sharpening Rifle-Barrel Drills
By W. L. OLMSTEaM
Methods having a bearing on greater production have
probably not been overlooked by the men in charge of bar-
rel drilling in shops using barrel-drilling machines for drilling the hole in the barrel of a modern
military rifle. It is a fact, however, that the method used for resharpen-
ing the drill is not generally given the consideration war-
ranted for a maximum output.
The output of one large manufacturer for one unit of 10 two-spindle horizontal-type machines is
1'70 to 175 bbl. every 10 hours, approximately 35 min. for drilling each barrel. The barrels are
324 in. long, 0.315 bore. The feed approximates 7_- in. per minute.
In this connection, it is interesting to mention that one firm scrapped only 300 barrels out of a
total of 250,000 finished barrels—one-eighth of 1 per cent. This was only made possible by
consistent attention to the methods used by the men held responsible for the manufacture and
upkeep of the drills. In this shop an average of five drills is required for 1000 barrels.
Experience has proved that a barrel drill that has been sharpened on an emery wheel will not
produce satisfactory results when ground to mechanical form on either a wet or a dry wheel.
One of the objections to the emery wheel is that it has a tendency to draw the temper along the
entire cutting edge or burn in minute spots, allowing a rapid breaking down of the keen edge of
the drill when in use. The rapid breaking clown of the emery wheel during abrasion is also
unfavorable for obtaining a. -menu, close-grained cutting surface on the lip of the drill, the
minute particles of detached emery scoring the surface. This considerably lessens the
endurance of he drill.
It has been demonstrated that the best results are ob-
tained when the drill has been sharpened on a wet grind-
,one by a elan trained to the work. The sharpening
hould not be done in a perfunctory manner, nor the re-
nsibility placed with the operator of the machines.
('vie well-trained man can perform the sharpening opera-
:.n for 60 spindles. He will soon find that drills for
me spindles require a certain style of grind, owing to
_e peculiarity in the motion of the machine. Often-
the spindle thrust adju~tulent, equipped with ball
cannot be kept .r. erfe t adjustment, the balls
becoming out of round or flatted, with resultant pounding of the barrel against the drill. In
general, spindles show this condition froln vibration up to a perceptible pounding, and it has a
marked effect on the efficient work of the drill.
The drills can easily be sharpened to offset this and other drawbacks to efficiency by a plan
especially assigned to the work. Drills that are sharpened to a set form by Tom, Dick or Harry
cannot do the same effective work. It takes only one spark from an emery wheel to cause
drilling trouble.
X5
Grinding Gage for Use in Sharpening
Twist Drills
By H. H. PAalEIi
The illustrations show a couple of modifications of the angle gage sometimes used for
determining the correct angle when sharpening twist drills. Means is provided for assistance in
making the lips of equal length.
The body in each case is made of sheet steel shaped to the proper angle for the drills. Then a
sliding pointer



GRINDING GAGE FOR TWIST DRILLS
is provided for determining the width of the lips. In one ease this is merely a spring-steel clip
which is held by friction and which may be slid along the inclined end of the gage. At B is shown
a more elaborate arrangement, where a grooved block straddles the gage body and carries the
pointer. This block slides along as in the first arrangement, but may be closely adjusted by
means of a knurled-head screw. If desirable, a pointer may be attached to each side of the
sliding block.
Drawing Out High-Speed Steel
Under the Hammer
B 2 J. A. RAtI+IIT
On page 162, James Ellis speaks about drawing out short solid, tools to fit toolholders. I have
been practicing this method for some time, but the bits drawn out recently do not stand up. They
do not seen to show the same velvety grain that they did before they were forged the grain in
them is dark and coarse and more liketll~lt ' fine-grain cast iron. Can someone suorest a _._  
II
May 17, 1917        AMERICAN MACHINIST        869
A Home-Made Forcing Press
By JAMES E. MYE
In the small shop, where expenditures and space are limited, we must often resort to
makeshifts and tools of our own manufacture to overcome the difpiculties connected with the
general run of work in the jobbing shop. The accompanying drawing shows how we
eliminated the bane of the machinist's life—the sledge-hammer fit.
Shoproom being scarce, we decided to go up, and the results have been most gratifying. The
press, as we built if has u ri hts 12 ft Ion ' and will handle almost an
The spacers F are long enough and set far enough apart so that while acting as guides they
still allow the crossrail to be moved freely up or down.
With a few short pieces of 2-, 4-, 6- and 8-in, pipe faced on both ends and a number of extra
bars of f-, 1-, l -, 12- and 2-in, square cold-rolled stock handy, the pressing in or out of pins
and bushings and the changing of automobile transmission gears becomes a pleasure.
The pump, being hand-operated, allows one to get the "feel" that is so essential in
straightening work.

p g        y        Forming an Awkward Radius~        in Sheet Steel
By GEbuGF, WOOD
Referring to the article by W. D. Forbes on page 178, it is my opinion that the tool maker
desired to convey the idea that he obtained the radius by some wonderful work.
However, the job itself seems simple enough, for in
the-course of experimental work I'have often had occa-
sion to make pieces similar to the one described.
I would form this particular piece with the aid of two pairs of it-in. parallels, a 11-in, piece of
round stock and four spacing blocks, two of 12 and two of 18-in. thickness, as shown in Fig.
1. One set of the parallels would
be spaced-with the 12-in, blocks and the whole held to-
HOME-MADE FORCING PRESS
job rapidly and well. At A is an ordinary portable "whiskey" jack. We have also used a
oomnion screw jac
big jack was out on a job, or could not be secured.
The drawing is self-explanatory.- The stop-pin holes B in the uprights we spaced to 6-in.
centers. In the ends of the crossrail C, matching up with the stop-pin holes B, we drilled two
holes; the first, from the top edge of the crossrail to the center, is 31 in. and the second 7-1 in.
which gave us a minimum adjustment of 2 in. to the crossrail. The bars D are fastened to the
small plates directlyabove them by stiff tension springs, which hold them snugly in place at
all times but lea-ye them free enough to be moved to suit the job in hand, be it either a press
fit or a straightening job. When used as a straightenin press, the shaft, or bar, is put through
between the uprights, lengthwise of the press and laid on short studs E; the bars D are
adjusted to suit the bend, the crossrail C is pulled down, the Ig-in, cold-rolled stop pins are
inserted in the nearest holes and the pressure applied.

211 d '.        STOCK
FIG. II The Method used to make the Piece        FIG.2 The Shape of the
Piece produced
FIGS. 1 AND 2. WORK AND THE _VIETFIOD USED
gether by means of suitable clamps. The 11-in. piece of round stock would then be placed
between this set of parallels. This arrangement- could be used to act as the male part of a
forming die. The other set of parallels would be spaced- with the 12-in. blocks clamped
together and used as the female part of tl}e die. Then it is only necessary to place the three
units `in the vise. square them up and press the i>-in. stock into the female die. Of course,
the stock is left generously oversize and when taken out of the vise will look as shown in Fig.
2. It is then a simple matter of laying out and cutting the sheet to the proper dimensions.
Ilow the tool maker .knew the radius was about 0.001 in. oversize can be accounted for
easily. The piece would naturally open up 0.001. in." or so when taken out of the vise'
868        AMERICAN MACHINIST        Vol. 46, No. 20
Lining Up Widely 'Separated Lineshafts and Countershafts
BY J. A. RAUGHT
On page 967, Vol. 45, and page 253, Vol. 46, G. B. Fairman and Daniel. W. Rogers,
respectively, describe methods of lining up countershafts at a distance from the lineshaft,
both using the floor to aid them in getting their points. However, with the floor obstructed with
Countershaft
METHOD OF LINING UP THE SHAFTS
machinery, partitions and other immovable things, I have found it necessary to resort to a
different method. The method I employ in such a case is shown in the accompanying
drawing, which is self-explanatory. Since adopting this method , I no longer go to the trouble
of chalk-lining the floor. Of course, in this method it is necessary to have a man at each end
of the line.

How Would You Make This Pattern?
BY M. E. DUGGAN
Ten castings were required. The patternmaker who made the pattern does not believe in
reading technical journals. He made the pattern split through the middle
The pattern is placed in the flask with the cope face H down and resting in the "bottom"
board. Sand is filled in up to the top of the prints I and G. At this point the filling in of the sand
is stopped, and the -loose pieces are lifted out of the mold. The cores I and G are now set in
place in the mold, the filling in of the molding sand is continued, the drag is finished and
rolled over ready for the cope. The making of the cope requires no description. The whole
pattern is molded in the drag.

Precision Locating Method for a 45-Deg. Hole
By WAITER G_ABRSEL
The illustration, Fig. 1, shows a side view •of a drilling jig clamped to an angle plate, the latter
being secured to the miller table. The jig consists of the casting A, the locating stud, the
swinging leaf C, which contains the clamping screw D, the drill bushing E, and the locating
pin F.
The four feet on the bottom or the jig were finished
in the usual way, and the two bases were acc`irately ,fin-

FIGS. 1 TO 3. THE JIG AND METHODS OF TESTING
                     Fig. 1—The finished Jig.        Fig. 2—Testing the plug.        Fig. 3
Le IhafPattem4=4%                        Testing the bushing
a                        s        _        ished to an angle of 45 deg.        The center lines of the stud
2,        8n____        ~~        ~'H        G, the drill bushing E, the pin F and the screw D were
a        ~"                                all in the same plane.
                     To accurately accuratel        determine the location of the hole for
-Lines of Correct.                        the drill bushing E, a piece was turned up parallel in the
                                 miller chuck and tapered off on the end, to an included
Li___ ___? __ ______;        _____ ,_ 6        angle of 90 deg.        The table was then adjusted
to get the  center of the stud in alignment with the machine spindle,

THE PATTERN AND THE CORRECT WAY. OF MOLDING   
and then the location of the 45-deg. hole was effected by
at the center line vertically, one-half of the pattern in        raising the knee of the miller until the
turned piece justthe drag and one-half in the cope.        A core 8 x 10 in. by        touched the
periphery of the stud, and the distance from
5' ft. long was made for the pocket.        After the pattern was        the shoulder to the piece
was 1.345 in., which could be
delivered at the foundry, the molder suggested a more        measured with the micrometer
depth gage, Fig. 2. practical way to make and mold -it.        The molder's method        The
hole, which had previously been drilled out ap-
is as follows:        proximately, was then bored to the proper size and the
Plan and make this pattern to be molded in the drag,        drill bushing inserted.        -
with the parting or cope face up, as at H.        Make D, E        The 0.128-in. hole in the hushing
was finally checked
and F loose on the pattern; D and E and the .coreprint are        up by sliding in the ground
piece shown in Fig. 3 until
made in one piece, loose on the pattern, as shown by the        the point A was just even with
the periphery of the
heavy dotted lines; F and G are one piece and loose.        The        piece (Fig. 1).        Then the
distance from the point to
molding is done as follows:        the shoulder was measured and found correct.,
pg 870        AMERICAN MACHINIST        Vol. 46, No. 20
Quick-Acting Tap Chuck        BY K. F.  RAUSCH

milled in the pipe. These slots were cut in the same line.
with the split bushing and practically equidistant from BY K. F. Ii AUSCl        each end. The three
slots permit the lap to expand and
The illustration shows a tap holder and driver that contract.
permit easy and quick removal and replacement of the        When this type of lap becomes worn,
it can be very
tap.        easily brought to the required size by placing paper or
At A is shown the main body of the tool, which receives thin metal shims under the pads or
sections. The pads
the tap holder shown at B. The tap holder is pinned in may be made of cast iron, brass or copper,
according to the material to be lapped.

Punch and Die for Round Stock
BY HUGo F. PUSEP
The shearing-off punch and die here presented were
built for continuous duty, shearing -in. rods to length.
The illustration shows the construction of the punch A ~/        and die. At A is the cast-steel die
shoe, or rather com-
~_ C bination of bolster plate and die shoe, because it is in- tended to be bolted direct to the
press in place of the regular bolster plate, through the T-head bolt holes C. The part B, which is
cast integral with A, is a reinforcement
QUICK-ACTING TAP CHUCK        necessary on account of the heavy jarring incident to the
place with a removable pin, to enable the use of holders work.
At D is the p*ich holder, made of cast steel, with a
for various sizes of taps in the same main body.        shank -for securing it to the press ram. The
shearing
The tap shanks C have a recess ground around them blades F and G of the punch and die are
identical; they close to the top, as shown. This permits the ball in the
holder to engage and hold the tap in place.        M,        Y_ 5
The holder B fits into the body of the tool, and the        ®~c        `6 R"        R square hole receives
the tap shank. Clearance is pro-
vided in the round hole. The ball is held in place by a        3L-         ffRfo; stork
few coils of a small stiff spring backed up by a short grubR        'far/stork
screw.        

Lap for a Long Hole        
BY HENRY J. 1OT7.        
Having a steel cylinder 2 x 26 in. long to bore, I found it quite a task to bore it smooth, straight and
round, using the old method of clamping the cylinder on a lathe carriage with the boring bar
between centers. Owing to the pressure of the clamps and the length and diameter
of the bore, the required accuracy could not be obtained
by boring. I then decided to make a lap, as shown in the illustration, similar to one that I had
made before.
Upon a piece of 22-in. pipe of suitable length and about are made of tool steel hardened and
ground, as are also equidistant from each end were placed three sections of a the guide plates
H and I. The projection J, to which cast-iron bushing that was one-third the length of the the guide
plate in the die is fastened, is further reinforced cylinder to be bored. Before cutting this bushing
length- by the thick web K. Four a-in, special square-headed
screws secure the shearing blades, the holes in the blades being countersunk for screw heads.
The guide plates -H and I are held by eight fin. fillister-headed screws, as can be seen clearly in
the illustration.
The holes L through the projection J are opposite the screw holes in the shearing blade G of the
die. The pur. pose of these holes is to serve as clearance holes for a long socket wrench,
thereby making it possible to change the shearing blades without disturbing the alignment of the
punch and die in the press. At M is shown the lowe
guide plate, with clearance holes N for the socket wrens
These holes, of course, correspond to the holes L. Th elongated slot 0 is the clearance slot for
the stock an is opposite the slot P. extending through the web K an the projection J.
SHEARING PUNCH AND DIE FOR ROUND STOCK

LAP DESIGNED FOR HOLE TOO LONG TO BE BORED
wise into the three sections, it was bored to fit the outside of the pipe. After the sections were
mounted upon the pipe, they were turned to a size 0.010 in. larger than the bored cylinder. Three
11 slots 16 in. long Were then
Machine Tools and the Matter of Priority an article editorito the
President Woodrow Wilson during world war one WWI a lesson for
President Barack Obama today.   webmaster editorial opinion.
872        AMERICAN MACHINIST        Vol. 46, No. 20
Machine Tools and the Matter of Priority An Editorial
LL of the munitions used on the
battlefield—the cannon, the field
gun, the automatics, the rifles—and all of the ammunition—the shells, the cartridges and
bombs-are created by machine tools.
All of the means of motor transport on land and through the air—the motor trucks, the "tanks,"
the motor ambulances the airplanes and the dirigibles—are the product of machine tools and
metal-working machines.
All of the locomotives and freight-cars and the rails over which they carry the coal and iron and
steel and merchandise of many sorts needled by a modern army exist solely because of the
prior existence of machine tools.
All of the engines in ships at sea, their propeller shafts and propellers, their auxiliaries—
pumps, dynamos, motors, cranes, hoists—the thousand and one mechanisms of the
battleship and the hundred and one mechanisms of a cargo ship—come into existence
through the operation of machine tools.
Then why overlook the builders of machine tools when it comes to priority in the distribution of
raw materials?
If it is because of the belief that the existing machine tools are sufficient, and that more will not
be needed, why are deliveries on machine tools now months behind and machine-tool builders
forced by the demand for their products to seek Government advice as to the disposition of their
first available machines?
The trouble is that the public and the public legislators and officials fail to perceive the
fundamental place the machine tool occupies in all modern industries, be they applied to
peace or to war. They see in the finished battleship and in the finished machine gun, highly
spectacular products that we need and must have in order to win this war. They see in mach ne
tools (if they see anything in them at all) prosaic mechanisms of secondary importance that can
well be left to take their chances in the general scramble for materials after the really important
things are given preference!
You men who build and use machine tools and who know that they are fundamental to
mechanical industry, and that all modern industry is mechanical, are to blame for this public
misconception. The men who do not know are not to blame. Education and instruction must
come from those who know.
You, and we as well, are to blame, because we have never gone systematically to work to
spread the economic truths about our business outside of our own field of machinery users.
The American Machinist has been published for machinery builders and users—not for
Congressmen and public officials. But we wish to tell you that Congressmen and public
officials are hearing from the American Machinist now and that they will continue to hear from
us—and that they must hear from every one of you as well.
For it is going to take a lot of hammering to drive home the facts that these people need to know
about our business.
Machine Tools and the Matter of Priority an article editorito the
President Woodrow Wilson during world war one WWI a lesson for
President Barack Obama today.   webmaster editorial opinion.
May 17, 1917       AMERICAN MACHINIST'  1917 as WWl rages in Europe.     873

We must hammer home the fact that the increased efficiency that the President calls for
means wearing out machinery as fast as possible to get the maximum production rate from it,
and means then buying new and improved machines to take its place.
We must hammer home the fact that machinery—and all of it created by machine tools—is the
vital factor in saving labor; and that labor, through machinery, must be greatly economized if
we are to survive and help others to survive the world-wide labor shortage that confronts" us.
Machinery must be put to work before the women and children are put to work.

We must hammer home the fact that machinery,—and all of it created by machine tools—must
till the soil and reap the harvest, if armies abroad are to be fed and those at home kept from
starvation and poverty.
We must hammer home the fact that machinery—and all of it created by machine tools—must
weave and spin and sew the uniforms for our soldiers and the clothing that is to keep our
wives and children warm; that it is the machine tool primarily that does this work, just as it is
primarily the machine tool that mines the coal and the ores and that transforms the trees of
the forest into -wares of wood.
We must spread the truth that the machine tool, the sole modern means of creating
machinery, is the vital cause back of all mechanical effects.
When we have made these ,truths as plain to others as they are to us, the following things are
going to happen:
There will be no more talk or intention of devoting the entire output of the steel mills of this
country toward the building of ships, disregarding the needs of thosewho build the machines
that build and equip these ships.
There will be no more idea of getting machine-tool building plants to manufacture munitions,
for it will be realized that one machine-tool building plant can, in a year, turn out enough
machines to equip from four to ten munition plants of similar size based on equivalent equip-
ment value. Those who at present advocate this plan might with equal judgment advocate
commandeering the farmer's seed for food, instead of using it to produce its fourfold to tenfold
harvest.
There will be no more false rumors, such as have been circulated during the past week, of the
requisitioning of machine-tool building plants, and such as have 'tended to upset the plans
and disturb the minds of those patriotically intent on speeding up the production of these
machine-tool plants to meet the coming needs.
There will then be no overwhelming sense of patriotic sacrifice evident on the part of those
who make a low price to the Government on materials for apparatus and munitions, and a
high price to the builders of the machines that will be used for and by the Government in the
transformation of these raw materials into finished form.
This editorial is going to every Representative and Senator in the United States, and to every
member of the Council of National Defense, and its subcommittees. This is something that
the American Machinist can do and will, and it is up to you machinery builders and users, also,
to send a copy of this editorial with a letter of indorsement to your particular Congressman,
and to any other public officials whom you know. Do this, and in addition to this, take united
action, and that quickly, toward putting your business on the Federal map, and assuring our
country of a sane priority that will protect the industry most vital to all others in war or peace.
874
S"k        AMERICAN MACHINIST        Vol. 46, No. 20
Shop Equipment News
Toolroorn and Heavy-Duty Lathes
A new line of toolroom and heavy.-duty lathes has been placed on the market by the Joseph
Crawford, Jr., Co., Erie, Pennsylvania.
A quick-change heavy-duty lathe is ghpwn in Fig. 1. This is made in 20- and 25-in. sizes and may
also beterminating at the spindle nose in a Morse taper. The spindle nose is threaded 2'1 x 6 U.
S. S. All bearings are bronze bushed.
Twelve gears in the quick-change mechanism, together
with the compound box, give 36 speeds for threading or
feed purposes. The taper attachment is bolted to the
carriage and may be engaged instantly. The attachment
allows the turning of all tapers up
to 3 in. to the foot, 15 in. in length on a lathe with a 6-ft. bed. The spiral relieving attachment will
do straight or taper, inside or outside relieving on both right- and left-hand work, with any number
of flutes from 2 to 28. The attachment is mounted on the gear box, and the tool slide
interchanges with the compound rest on the c oss-slide, thus embodying the swivel-me- feature
of the slide necessary for side and end relieving. Varying numbers of flutes are taken care of by
means of change gearing supplied with the attachment. A universal joint and bearinu block for
axial relieving are fur-
FIG. 1. QUICK-CHANGE HEAVY-DUTY LATHE        niched as an extra. The lathe is made
Swing over ways, 21= in.; swing over carriage, 144 in.; distance between        either with or
without tie-bar. The
centers, 46 in.; width of belt, 4 in.; diameter of front spindle bearing, 5 x 6 in.;        lathe may be
fitted with o11 pan au diameter of back spindle bearing, 3 x 5 in.; diameter of hole in spindle, 2 in.:
diameter of nose of spindle, 4 in.; diameter of tail spindle, 3 in.; travel of tail        pump, taper
attachment, collet equip- spindle, 8 in.: depth of bed, 14 in.; width of bed, 16 in.; toolpost opening,
4 x 14 in.;
capacity of center rest, 6 in.; ratio of back gears, 3.2 and 8.4 to 1; threads per        nient, and
arranged for metric thread-inch cut, 1 to 56; countershaft pulley diameter, 14 x 144. in.; speed of
countershaft,
r.p.m., 185; size of centers (Morse), No. 1; floor space, 24 x 9 ft.; weight, 4200 lb.        No work as
exti'a8 if so desired.
had in the semi-quick-i°hange style. The quicl.-i'hano-e lnecllanislu contains a train of 12 gears
which, together with the three speeds given by the outer compound box, provide 36 speed, for
threading or feeding. The hollow spindle is ground to size and tliteaded to receive a chuck or
faceplate. All bearings are of the self-oiling ring type. The tailstoek has a set-over screw for taper
work and is moved along the Rays by a crank rack-and-pinion mechanism. A cast-iron feed nut
is used, the head screw being 2 in. in diameter with a. four-pitch acme thread. 1iegular
equipment includes large and small face-plates, stead\ and follow rests, counter-
shaft, toolpost and wrenches. The lathes may also be had with taper attachment and with any
length bed desired. A countershaft of the friction cone type is used. The 15-in. toolroom lathe is
shown in Fig. 2. The spindle is of carbon steel ground to size and has a l'-in. hole through its
entire length,
I'
FIG. 2. TOOLROOM LATHE
Swing over wars, 164 in.; swing over carriage, 94 in.; distance between centers, 36 in.; cone
diameters, 4, 54, 7, 84 in.; width of belt, 2 in.; hole in spindle, 14 in.; front bearing, 44 x 24 in.;
back bearing, 34 x 24 in.; diameter of tail spindle, 14 in.; travel of tail spindle, 6 in.; carriage
bearing on ways, 21 in.; countershaft pulleys, 3 x 10 in.; countershaft speed, 150-180 r.p.m.;
capacity of toolpost, 4 x 1 in.; capacity of center rest, 44 in.; back gearing ratio, 84 to 1; cuts
threads from 1 to 56; centers, Morse taper No. 3; center, spindle sleeve, Morse taper No. 5;
weight, 1900 lb.

874        AMERICAN MACHINIST        Vol. 46, No. 20
Shop Equipment News
Toolroom and Heavy-Duty Lathes        terminating at the spindle nose in a Morse taper.        The
spindle .nose is threaded 24 x 6 U. S. S.        All bearings are
A new Ii tie        m e of tool Loo        alid heavy-duty Lathes has        bronze bushed.        
been placed on the market by the Joseph Crawford; Jr.,        Twelve gears        in the quick-change mechankin,
together
Co., Erie, Pennsylvaiiia.        with the compound        box, give 3 i speeds for threading or -
A quick-change heavy-duty lathe is shiiwn in Fig. 1,        feed purposes.        The taper atta.ehlnellt is bolted to
the This is made in 20- and 25-in. size,is and may also be        carriage and may be engage        instantly.        
The attachment        allows the turning of all tapers up
i        to 3 in. to he foot, 15 in. in length        on a lathe with a 6-ft. bed.        The spiral      II
:~<        . •        -        relieving attachment will do straight
S        M        or taper,        inside        or outside        relieving
-%        oli both right-        and        left-hand work;
with an        number of flutes from 2 to
28.        The attachment is mounted on
a~        w        j        the gear box, and the tool slide inter-
+-        Fh .        ~        ifi' ''        _..i        . =        changes with the compound rest on the
-,        (10'-'- cross-slide, thus embodying the swivel-
r        €=M ;        lilt.        feature of the slide IICI esslit        for
.        side and end relieving.        Varying nun-
^k.        tiers of flutes are taken care of by means
`        
-        of change gearing supplied with the at-
tachnlent.        A universal joint and bear-
ing block for axial relieving are fur-
FIG. 1.        QUICK-CHANGE HEAVY-DUTY LATHE        111611ed aS all CXtra.        Tl1e lathe 1- made
Swing over ways,        2l        in.: swing over carriage,        141        tn.; distance between        either with or
without tie-bar.        The
centers, 46 in.; width of belt, 4 in.; diameter of front spindle bearing, 5 x 6 in,;        lathe lnay be flttcd with oil
pan        111d
diameter of back spindle bearing, lx 5 in.: diameter of hole in spindle,        2 in.;        
diameter of nose of spindle, 4 in.; diameter of tail spindle, 3 in.; travel of tail        pump, taper attacllmellt,
collet equip-
spindle, 8 ln.; depth of bed, 14 in.; width of bed, 16 in.; toolpost opening, 4 x 1        in.;        went, and arranged
fol' metric thread-
capacity of center rest, 6 in.: ratio of back gears, 3.2 and 8.4 to 1; threads per        
inch cut, 1 to 56; countershaft pulley diameter, 14 x 14        in.; speed of countershaft,        111.2work        
aS        extras        if        SO        deSlred.
r.p.m., 151: size of centers (Morse), No. I: floor space, 2z x 9 ft.: weight, 42e0 lb.        
had in the semi-quick-change style. The quick-change mechanism contains
a train of 12 gears which, together
with the three speeds given by the outer compound box, provide 36 speeds for threading or feeding. The hollow
spindle is ground to size and threaded to receive a chuck or faceplate. All bearings are of the self-oiling ring
type. The tailstock has a set-over screw for taper work and is moved along the ways
by a crank rack-and-pinion mechanism.
A cast-iron feed nut is used, the head screw being 2 in. in diameter with a four-pitch acme thread. Regular
equipment includes large and small face-plates, steady and follow rests, counter--shaft, toolpost and wrenches.
The lathes may also be had with taper at ent and with any length bed decountershaft of the friction      

FIG. 2. TOOLROOM LATHE       Swing over ways, 16a in.; swing over carriage 9t in.; distance between centers,
aaed. The 15-m, toolroom 36 in cone diameters, 4, 5 7, 8- in widt1y, of belt, 2 in hole in spindle, 14 in front
bearing, 4 x 28 in back bearing, 3; x`24 in., diameter of tail spindle it in
lg. N. The Spindle travel of tail spindle, 6 in carriage bearing on ways, 21 in countershaft pulleys, 3 x 10 in.;
countershaft speed, 150-180 r.p.m.; capacity of toolpost,        x l in.;
to size and has capacity of center rest, 4 in.; back gearing ratio, 82 to.l; cuts threads from 1 to
entes, Morse taper No 3; centeF, spindle sleeve, Morse taper No 5; weight,
1900 ;lb.                                                            
 pg 877
AMERICAN MACHINIST
877
May 17, 1917
II~ LATEST~ WASHINGTON EDITOR

Washington, D. C., May 12, 1917—Not a day passes particular. The sooner this coordination
can be secured;
without bringing letters from different parts of the country asking how to get in direct
communication with the right party to utilize some particular plant or manufacturing capacity. In
answering these. inquiries I can do no better than to quote from a recent interview with
Secretary of the Interior Lane in the New York Times, who calls the war "a test of the ability of
this particular democracy, the United States, to organize itself out of ad away from the dangers
of economic anarchy. There is a country-wide willingness to serve; its usefulness will depend
on the ability of the Government to translate that willingness into effective effort, freed of waste
of time, materials and money."

Offers of ideas, of service and of material are flooding the capital. But the machinery for using
it all, in the way that will do the most good, has not yet been perfected. It is a slow process.
The indispensable thing is an agency for coordination, and that seems to be lacking. Here is
a case in point : " Practically all the available steel of the country was offered to the Navy
Department and accepted for the building of big warships that are needed, but which cannot
be finished for several years. This meant the diverting of steel from other industries, which
has seriously handicapped the country, in its work of feeding the Allies and in making its own
internal preparations for war.
The steel should not have been turned over to the Navy Department, but placed at the
disposal of the Gov- ernlnent, to be parceled out in a more immediately effective way. And so
with all classes of material and effort.
It should be stated here that the Priority Board is not yet an actual part of the system. This the
secretary believes to be necessary to tie the groups together. He
says:
"The group organization is progressing rapidly, but the groups themselves must be tied into a
whole machine abundantly lubricated with the oil of coordination. The
transportation of flit country has been organized into an
interlocking whole, making 250,000 miles of roads into a single cooperative system and
eliminating wasteful competition. Even now the duplication of trains on the roads running into
Washington on different roads is being eliminated to save locomotives and cars for other
work. But that does not go far enough. Beyond all this arises 9ie question as to what shall be
shipped first, and in what quantities."

- This will give some idea of the situation as viewed Gnm one in a better position to know than
any corre- condent can be, and his advice seems to be sound in every
the faster we shall get on and the fewer mistakes we shall make. And when that time comes,
we shall be able to find out exactly what to do and when to do it, with the least possible delay.
In the meantime we can only offer our services, get our shops in the best possible condition
for efficient work and wait the call that is sure to come, unless of course our regular work is of
more importance than any new work we might undertake. In that case the Council of Defense
will recommend that it be not disturbed. In fact, it is the intention to disturb existing business
as little as possible; and where it is necessary to do so, to take only a portion of the plant for
the new work. In this way the old line of business and of customers can be retained to a large
extent, which will be much better when the period of readjustment comes after the war.

No TIME FOR EXPERIMETAL WORD
As soon as Congress takes off the brakes, which will possibly be before this gets into print,
the one watchword in every shop should and must be production and ever more production.
This does not refer solely to the manufacture of munitions, but of everything that enters into
both military and civil life during wartime. With the working force depleted by those in military
service and the regular lines of industry made supplementary to the supply of military material,
the greatest economy of production becomes necessary; and this means producing the
greatest quantity with the least waste of material and the least expenditure of time and labor.
This naturally leads to the abandonment of practically all experimental work except such as is
absolutely necessaryto develop something that has been found meritorious or a new device
that is considered absolutely necessary. It is obvious, however, that it is not the time to design
a new airplane motor and present it to the aviation board with the idea of its being adopted
now, for no matter how excellent it may be, if it presents radically new ideas in either design or
construction, it will probably take at least a year to develop it and another year to get it on a
manufacturing basis.
The crying need of the aviation department is motors and more motors of the dependable
kind. Our lack of support to the development of airplanes has resulted in a number of different
types and designs of motors, but with only a very few of these on a manufacturing basis. In
some cases, even with motors that have been specified by, different boards, there has been
almost no standardization ; and even such obviously necessary standards as bolt
May17, 1917        AMERICAN MACHINIST        879
to be a tendency to overlook its importance at this time. While some contracts are under way for
the making of master gages, or more properly, checking gages, for some classes of
ammunition, we seem to have overlooked the experience of Canada in this connection and to
have underestimated the number of such gages that will be necessary.
The wear of gages, even of checking gages, is greater than many seem to realize, and the work
of inspecting and of salvaging such gages as may be reclaimed is far greater than seems to be
understood, especially by those who are not familiar with the production of 'materials in large
quantities. Referring again to the experience of the Canadian Munitions Committee, it is
interesting to notice that its inspection plant at Ottawa har dies about 20,000 gages per month, of
which 16,000 are new gages and the remainder those which have been reclaimed after wearing
beyond the prescribed tolerance. To show further what an immense undertaking this central
inspection bureau is, it received $171,000 worth of gages during the month of March, making a
total of over $1,250,000 worth of gages that haye passed through its hands since the beginning
of the war.
CENTRAL INSPECTION BUREAU VERY SUCCESSFUL
This 'central inspection bureau has proved so successful that it seems to point out the
advisability of following the method in this country, with the central bureau here in Washington at
the Bureau of Standards, as has already been mentioned. There are some arguments being
advanced in favor of establishing inspection departments in charge of Bureau of Standards men
at the different plants making gages for the Government, but the greatest advantages seem to lie
with the plan of the central bureau where all gages must be sent for final inspection. The only
disadvantage seems to be the time required to send gages to Washington and to return them,
should they not be found acceptable. As few will probably have to be returned and as the
distance from Washington will seldom reach beyond a 500-mile radius, this plan does not seem
to have nearly so many objections as the establishing of separate inspection departments,
especially as the number of concerns making gages is likely to be largely increased as the
months go by and the need of a great quantity of gages becomes more apparent.
Among the advantages of the central bureau is the smaller force required, the tendency to
eliminate the personal equation of the inspector and last, but by no means least, the opportunity
of exercising judgment as to priority of the gages inspected, as pointed out by Secretary Lane
and previously quoted. It is further interesting to mention that work is already going forward at the
Bureau of Standards so as to be ready to test the gages as soon as they are received. The only
thing that can delay the work will be the failure to secure enough suitable measuring
instruments, owing to lack of appropriations, rather than to the inability to secure the instruments
themselves. This work will be in charge of Dr. Louis A. Fischer,, which insures careful attention
and thoroughness as to all essential details..
This is as good a place as any to set at rest the rumors that the advocates of the -metric system
at the bureau are attempting to have the system adopted on all shells *t this time. This report, I
am assured, is entirely a creature of someone's vivid imagination, so far as the bu-
reau is concerned, although it is quite possible that some individual .may have suggested that it
be done. But the men who will have the shellwork in charge are too thoroughly practical to
advocate such a change at this time, no matter how strongly they may believe in the advantages
of the system as a general proposition.
THE PROBLEM OF EXEMPTIONS
One of the iiext problems we shall be up against, and that as soon as Congress gets through
quibbling over the exact details of the new army bill, is the matter of exemptions for the men in
the trades that are vital, not only to the conduct of the war, but to the maintenance of such regular
occupations as are necessary for the vast number of workers who must always be behind the
army itself, supplying it with its fighting material and other necessaries. Wires are already being
pulled by some employers in some industries to secure exemption for their men, so as not to
interfere with their business, and in some cases at least there is not the slightest excuse for
such exemptions. Their idea of universal service seems always to refer to the other fellow and
not to themselves.
The problem will be difficult at best and with everyone trying to solve it for the best interests of the
country at large; but it will be complicated and made much more difficult when such lines of
business as are not necessary to our welfare, but exist only to cater to some luxurious whim,
begin to demand exemption. If it happens that toolmakers in jewelry-making firms can be used
elsewhere to advantage, there is good reason for exempting them, but not to remain in the
jewelry-making trades.
A SUGGESTED PLAN
It has been suggested, and the suggestion seems to have its good points, that the exemptions
might take the form of assignments to certain kinds of work or even to certain shops, just as a
soldier or an officer is detailed for specific work. This policy 'would in nowise affect the status of a
man as a workman, and he would be paid by the man who employed him, at the regular wage or
salary for that work. But he would be in touch with authorities at all times so that, although
exempted to do certain necessary work, he could not be used on something that was entirely
unnecessary. Being enlisted, so to speak, in the industrial army, he would have some sort of
badge or identifying mark, such as that given the munition workers in England—a practice that
has been found to be very helpful in many ways.
The decisions as to who shall be exempt present a delicate problem entirely apart from the
personal side, which cannot be overlooked. It would evidently be very bad judgment to exempt a
man who wanted to go to the front and send the man next to him, who would much rather do his
bit in the shop. It is also difficult for any employer to decide just what men are most necessary to
keep his business going for the real benefit of the country at this time. There must be some
coordinating board or head that can determine first what industries are most necessary at this
time and then what classes of men are most needed to conduct them. A careful balancing of the
whole situation is required, and the plan must not be upset by individual employers, particularly
in trades of doubtful value, endeavoring to exempt their men for purely business reasons.        
FRED H. COLVIN.

Natco Machining Cadilac V8 Crankcases
shell-making capacity of the country
*3 S        AMERICAN MACHINIST        Vol. 46, No. 20
holes for fastening the motor to its bed on the plane have not been maintained. What is needed
is a far greater capacity for turning out motors of acceptable workmanship from some of the
designs that have proved fairly satisfactory in actual service, rather than new and perhaps better
designs that cannot be manufactured in less than a year.
It was supposed that manufacturers in general knew that the shell-making capacity of the
country is ample, not only for our own. needs, but for any foreign orders that it might seem wise
to divert to this country; but this does not seem to be the case. Word has just reached me that a
silk mill in the vicinity of New York is equipping its shop. to make shells, when there are several
good shell-making plants with not only the equipment, but the experience, lying idle, one of them
only 10 miles from the silk mill in question.
The question of shells is being well taken care of, and any attempt to get into this part of
munition work will not only result in financial loss for those interested, but will take away
productive capacity from other lines in which it will be needed. Any expenditure by a new plant for
machinery for shell making is not only an unwise investment, but may take machines that are
urgently needed elsewhere. The things that are needed now are cannon of various sizes, with
the mounts and fittings that must go with them, material for the new ships that are just getting
under way, airplane motors and similar parts, and a host of things that go to male up the
supplies of an army; but shells and fuses are well provided for, especially the former.
THE Nrw Woonwg Si-imps
While nothing definite has been given out as to the final decisions concerning the new fleet of
ships, there seems to be little doubt that the following figures will be found approximately
correct: Length, 2 5 ft.; width, -16 ft.; molded depth, 26 ft.; draft, 23 ft. The main-propelling engines
will be triple expansion of either 150 or 1500 indicated horsepower units, which will give a
normal speed of 10 knots with a reserve large enough to bother a U-boat in catching them in a
long chase. Turbines maw also be used in some of them; but it is probable that reciproating
engines will predominate, unless oil engines of the Diesel or semi-Diesel type can be secured,
which seems doubtful. The boilers will be of both the water-tube and Scotch types, will carry 200
lb. pressure and
have perhaps 1 per cent, excess over the rated engine
power.
The necessary machinery will include that of any oceangoing vessel, such as propellers,
condensers, air pumps, circulating pumps, boiler feed pumps, fuel-oil burning apparatus,
evaporators, feed-water heaters, forced-draft apparatus, fuel-oil tanks, refrigerating- apparatus,
piping and fittings, generator sets, wireless apparatus, steering engines, deck winches,
capstans, windlass, anchors and chains, davits, bits and chocks, turnbuckles, wire and hemp-
rope, metal berths for cabins, galley equipment, lifeboats and navigating apparatus.
If you can supply any of this equipment complete, or any part of it, it would be well to get in
communication with the Shipping Board, llunsey Building, Washington, D. C., at once, as there
will probably be at least a thousand of these ships built, according to present indications.
When the time comes for ordering the thousands of things that must be ordered as soon as
Congress acts, the probable procedure will be about as follows: The army. through its Ordnance
Board, will probably announce the articles desired and call on the Munitions Board for
information as to the firms likely to be in position to do this work well and quickly. Here is where
the industrial inventory taken by _-Mr. Coffin's committee last year will come into play. and all
those who seem to be equipped for the different kinds of work will be asked to bid on whatever it
is believed they can handle to the best advantage. Specifications and blueprints will be
furnished and the bids called for at an early date. This is not an official statement, but it is the
probable method of handling orders, at least in the beginning.
Co~mPFTITIvn Brno PROBABLY U\slrlsFAcroRY
In cases where the work is entirely new to most manufacturers. owing to the fact that we are not
and have never been a warlike nation, it will probably be im'possible to secure competitive bids
that will be at all satisfactory either to the bidders or to the Government. In such cases there is a
provision made in a bill passed by Congress at a recent session, making it possible to give
contracts on a '`cost plus a specified percentage of profit" basis. It seems likely that there will of
necessity be considerable of this kind of work, which makes it highly desirable from the
standpoint of the builders as well as of the Government that there shall be some effective
system of checking-actual costs and of utilizing the best methods possible with work of this kind.
The services of a few men who are familiar with accounting of this class, to act as instructors in
shops where the work is new, would undoubtedly be of great help to all concerned.
As to just what will be ordered first, there is no definite information at this time. As shells are well
provided for, so far as shop equipment and shell-making capacity are concerned, these may be
dismissed from mind except as orders for firms already in the business. Cannon of all sizes
from 3 in. up to the big howitzers will be needed and needed badly, and shops that can handle
work of this kind will be filled to the brim very shortly. Gun limbers. now made largely of steel,
although it is quite probable that some wooden wheels will be used, will also be needed in
equal quantities. This means considerable fairly heavy pressed-steel work, riveted, oxyacetylene
or are welded, as the case may be. The poles are now made of steel, and some at least are
made from sheets rolled up into a tube and welded : drawn, tube can also be used, but a taper
is required, and this is not a usual product of the tube mills.
StTBCOX TJ Acrs LIKLLY
Recoil mechanism, sighting mechanism and ammunition caissons naturally go along with this
group. While these parts will in many cases be made by the man who makes the gun, there are
likely to be subcontracts awarded by him.
There is also likely to be a lot of metalwork in the shape of field kitchens, cooking utensils,
soldiers' mess equipment, probably metal helmets, trenching tools and dozens of articles with
which we civilians are not at all familiar.
As the question of gages, next to materials, is fundamental in the making of munitions of all
kinds, I may be pardoned for mentioning it once more, as there seems
AMERICAN-MACHINIST-1917-Vol 46 No-20-May-17
pg 55


May 17, 1917        Buying—AMERICAN MACHINIST—Section

55
POSITIVE STOP FOR.
FORWARD WHEEL SLIDE STROKE
HAND WHEEL FOR  OPERATING. CHUCK
START AND        -~ STOP LEVER
FOR WORK        '~
SPINDLE
PUMP PULLE
SHUT OFF LEVER FOR "WATER
LIKNOCK OFF LEVER FOR BACKWARD AND FORWARD MOTIONS
,REVERSING\ITOeS
• Yes the Bryant  method of hole grinding is unusual
but that feature fades into insignificance        .when compared with the remarkable hole
•                grinding production which this design        wheel into the work without loss of rigidity.
makes possible.
The machine tool world is now quite         But on the basis of Production—that vital
•        familiar with the radical design of the        test of any machine—we want to discuss
Bryant Grinder. The swinging wheel head,        with you the Bryant possibilities on your
suspended from the overhead slide bar, pre-        work. Let us estimate Bryant production
sents many obvious advantages—markedly        time on your hole grinding; and write for
revealing an ease of accuracy on a ratio of        the Production Book, which contains ex-
2 to 1, and a decided ability to push the        amples of hole grinding of almost every kind.
BRYANT CHUCKING GRINDER COMPANY
SPRINGFIELD        -        -        -        -        VERMONT
90
No. 20
(The Adams mfg co.) Farwell Universal Gear Hobber
Worm Wheel  V Bearing

This No. 4 machine is very rigid in construction. The Hob Arbor is close up to the Housing,
secured in a heavy blocky head.
The work table, which is 24 inches in diameter, runs in a V-groove nearly the outside diameter of
the table.
The bronze worm wheel is 20 inches in diameter, and is gener-
ated by the use of a much larger worm wheel of great accuracy.
Bronze boxes support the worm independent of the splined shaft which drives it. Means for
making very delicate adjustments are
provided.
Either the veneer or gauge may
be used to set the head to proper    
angle for cutting gears.      
Adjustable bronze bushings are            -8615 - used throughout.
The main drive is through steel gears and large universal joints which have given very
satisfactory service.
This machine will cut spurs, spirals of all angles, worms, worm wheels, sprockets, ratchets, and
spline shafts up to 36 inches in diameter, 12-inch face.
There are many other features on this machine worth your consideration.
Write for catalogue No. 807.
THE ADAMS COMPANY
1904 Bridge Street        -        Dubuque, Iowa
Pg. 82        Buying—AMERICAN M A C H I N I S T—
Section        Vol. 46, No. 20

You would not grind slender pieces
without a work support, yet
for such pieces you do not require the same method of support that is necessary when taking
heavy cuts from larger diameters. There, in a nut shell, is the reason why we furnish our large
Plain Grinding Machines with `Combination Back Rests. You get
correct support for each class of work, thus
insuring maximum output from a machine.
What is the principle? Simply a combination of the well-known universal and solid back rests.
You can set these rests to be fully universal
• and follow lighter pieces automatically to size. On heavy pieces the rests can be set to give a
solid, positive support at both shoes. On other classes of work the rests can be set so that they
are semi-universal, having solid support beneath the work and a spring support in back of it.
Brown & Sharpe                There are other features just as
interesting as this. Send for further
PLAIN        information and 'learn why these ma-
chines are so successful in shops requir-.
GBINDING   ing fast production of highest quality G           and accuracy. MACHINES        Also Ask
for Catalog 136
BROWN & SHARPE MFG. CO.
Providence, R. I. U. S. A.
New York, N. Y.        Syracuse, N. Y.        Rochester, N. Y.        Pittsburgh, Pa.        Philadelphia,
Pa.        Chicago,
20 Vesey St.        Room 419.        415 Chamber. of        2538 Henry W.        652-654 The
Bourse        626-630 Wasb
University Block.        Commerce Bldg.        Oliver Bldg.        Blvd.
May 17, 1917        Buying—AMERICAN MACHINIST—Section

.270°diameter        Bearing%"long                
screw and anvil,        twice as long as                
This gives 16%z%        bearing in other        No split        
more. Wearing sur-        micrometers.        in sleeve to        
        Can be replaced                
face at this point        when worn.        admit dust and        
than`.250~~dia.                        dirt and cause        New safety
                        Accurately        rapid wear.        retaining clip,
                        fitting bushing                prevents the two nuts
olid                        insures close fit                being separated when
Solid                        for scre                
                        .                
inserted `                        ,                the screw is removed.
                        Replaceable,                
anvil.                                        
                                        Arrangement of        •
                                        nuts insuring        -
                        long bearing
                        in spite of wear.
        One piece                
        hard-tool                Decimal
        I        steel scrywv.        Short nut        
Section frame                I        to compensate        equivalents
drop forged from                        for wear        stamped on
bar steel.        I        r        Long nut to        in threads,        th.imble.,
        overcome wear        German silver        
        on anvil or screw.        spring        
        Replaceable,        gives uniform        
Black enameled        Giving entirely        tension on        
        new bearing                
or polished frame,        for screw.        screw.        
The all tool steel screw of the
"Slocomb" defies wear
This is one of the reasons why the Slocomb Micrometer has rejoiced in the reputation of being
"the longest lived micrometer that can be bought."
Of course, the accuracy of a measuring instrument depends almost wholly on the threads of its
spindle screw. In the "Slocomb" —and only in the "Slocomb"—this screw is all tool steel, as
hard as can be threaded. Moreover, the nut bearing on the screw is unusually long, permitting a
further reduction of wear.
Besides these safeguards, the Slocomb wear-adjusting device takes up any possible slack,
and assures that invariable accuracy without which a micrometer is valueless.
The full "Slocomb" history—which parallels the history of accurate commercial measurement-
is told in the "Measuring Book." Your request brings a copy, and with it the Slocomb Catalog.
J. T. SLOCOMB COMPANY
Providence, Rhode Island, U. S. A.
Representatives in England: Chas. Churchill & Co.,        Representatives in Japan: Alfred
Herbert, Ltd.'
Ltd., London, Birmingham, Manchester, Newcastle-        Yokohama.
on-Tyne and Glasgow.        Representatives in Australia: Edwin Wood, Pty., Ltd.,
Representatives in Italy: Chas. Civita, Milan.        Melbourne and Sydney.
I7fl...        .:_-~        riLadr2 -        'B-8.BZ5. 9-2812        ,.,,,        ,
"The longest lived = micrometer that can be bought."
I collect slocomb Mikes and tools , as there seems to be a lot in Metro Detroit I bought a set
of them 1 to 12 inch about 8 in all from Western Machine Tool co. when r the City of Holland
Michigan sold the contents of the machine shop  in order they said at the time to makei it
into a musuem  the destroyed the building later and sold the watererfrount peoperty to a
developer   some machine tool museum huh....
May 17, 1917        Buying—AM ERTCAN ilACHINIST—Section        pg 101
And if it is Rim Welding        Tho soli Pr• ce'ss
that interests you, here's
a machine that tells        5 ~"
its own story        ', / \ `` \ .~
[t's a Thomson 15-A Wekdi:ig Machine designed `.or welding heavy automobile rims. All parts  
ire necessarily made massive and substantial in )rder to prevent trouble and give continuous
service. The rim to be welded is placed in the .pecially constructed vertical clamps which are
Locked by a -series of hand levers. Current is
turned on by a pedestal foot-operated switch        _ -
Ind the metal becomes heated. Welding pres-
,ure is applied by the 25-ton hydraulic ram, and        A
the current turned off. The welded rim is then  removed from the clamps—
machine itself tells you that much, if you  leek additional information—
write for Butt Welding Catalog No. 21-B.
!OMSON ELECTRIC WELDING COMPANY
., U. S.A.
1 Falls St., NIAGARA FALLS ' 4100 Langland St., CINCINNATI        323 N. Sheldon St.,
CHICAGO        1127 Majestic Bldg., DETROIT

A New Feature        No. 2
 Reid
 
For Rapid Grindin        surface
 Grinder
Quick starting and stopping of the Reid Surface Grinder is        
accomplished by a push-rod, operating in the center of hand-        
wheel.        A pull starts the machine; a push stops it.        
That is typical of the convenience of handling this tool.        It        
has the ease of manipulation that means rapid work—the        
accuracy that means exact work.        
Positive Cross-Feed not friction) will feed from .007 to .084        
in. at each end of stroke; at each reversing point or feed at        
one end of stroke only, if so desired.        
Write for bulletin that tells all the details.        
Boston Scale & Machine        Co.        
381-389 Congress Street, Boston, Mass.        
Also builders of        t
TT T y~        TT        y. C n        Saves time—saves equipment—in setting work at odd angles
T 1        V U 11        v!        1 s Q        Adjusted exactly to any angle in an instant. Adapted to every
_        type of machine.        Converts plain machines into Universals.
Angle Plata        Write for Bulletin.
104        Buying—A M E R I C A N MACHINIST—Section        Vol. 46, No. 20 ~
general Purpose Machining

BARBER - COLMAN COMPANY

When it is a question of producing enormous quantities of accurate gears in less time than is
possible on any other type of gear cutting machine it is well to remember Barber-Colman's
Gear Hobbing Machine.
It is a Single-Purpose Machine with a limited range. It meets all requirements of
manufacturers producing such gears as are commonly found in high-grade machine tools,
automobile transmissions, etc.
It is a machine built around the idea—Heavy Duty Work Accurately Rendered.
BARBER - COLMAN COMPANY
Q - O        ROCKFORD, ILLINOIS, U. S. A.        O
PAGE 142
Buyin —A :Ml E R I C A N MACHINIST—Section        Vol. 46, No. 20
Peninsular Tool Salvage Company
The saving on the
small cutter is equal in proportion to that of the larger one
No matter how large the size or kind of milling cutter, your saving will be in the same
proportion as on the smallest size.
Take the figures at the left. They cover two plain mills that we recut last week. Note that the
man with the big costly mill is not charged "all that the traffic will bear," even though it
would still be profitable to him to have the cutter recut.
In fact he can have it recut 22 times for the cost of a new mill.
Experience has shown that recut mills are fully as good as new.
Haven't you been overlooking a gold mine in your junk pile?
Don't wait another day. Send us a worn cutter and let us show you.
Peninsular Tool Salvage Company
45 Fort Street, East, Detroit, Mich.
Size 113 x 7 x 3 in. Plain Mill. List Price
$338.15.
Our charge for recutting, $135.26; weight,
110 pounds; saving, $202.89.
Size 24 x 1 x 1 in. Plain Mill. List Price, $4.55.
Our charge for recutting, $1.82; weight, 3 pound; saving, $2.73.
You get the worth of your money
from the HERCULES. You get two timesavers in one, a combination of highly developed
rod cutter and shear. The HERCULES is no ordinary shear but a well-designed, carefully
made machine. All material is of the best.

HERCULESNos.1,2and5 Shears and Rod Cutters
incorporate many improvements.        The shear blades S have a draw-in cut which gives
no tendency to crowd out the work. All Hercules =_ parts are interchangeable. You'll be
surprised how much work you have in your shop fora HERCULES Shear and Rod Cutter.
Write for Catalog No. 10 and also Catalog No. 5 which shows our complete line of Tucker
Oil Hole Covers.
W. A. & C. F. Tucker
Hartford, Conn.        U. S. A.

Nos. 3 and 4 Great- Producer  At A Low Cost
En nearly every instance where he Wisconsin Hand Miller has seen installed—it has
reduced production costs materially. This s on account of the many fea:ures which make
for accuracy, :onvenience and speed. They tre found in the
WISCONSIN HAND MILLER
Has strong, rigid column with liberal bearing surface. Large catch pan for chips and
Spindle made of special spindle steel. Cone has four steps. Eight speeds can be
obtained through countershaft. Extreme travel throug". leverGnin.,through crank 12 in.
Longitudinal feed 12 in., transverse feed 44- in. and vertical feed 53, in. Height of machine
524 in. Guaranteed for one year.
Write for the Wisconsin Bulletin.
Wisconsin Miller Mfg. Co.
Station A        -        -        Milwaukee, Wis.
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