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The new No. 24 extends the range of Fellows Involute Measuring Machines to gears up to 24 inches pitch diameter—spur, helical or herringbone, and internal as well as external. These machines operate on a basic principle, dispensing with sine bars,
base rolls etc; and require no difficult calculations. Settings for various base circle radii are made with standard size blocks. Visual readings are in tenths of a thousandth on a dial indicator. Electrical chart recording of similar sensitivity and magnification is used where records are wanted for study or permanent reference .. . For details, write The Fellows Gear Shaper Company, Springfield, Vermont—or 616 Fisher Building, Detroit, or 640 West Town Office Building, Chicago.
FROM BLANK TO FINISHED GEAR
MAY 28, 1942
MACHINES AND TOOLS FOR GEAR PRODUCTION 8 1 1 AMERICAN MACHINIST
A CITATION FOR MEN IN WAR INDUSTRY
One suggested method for holding second operation work, requiring loca-tion from the bore: A piece of stock is turned, slotted, and tapped with taper thread. Work pieces are loaded on this plug. A pipe plug is then used to expand and tighten the arbor against the inter-nal diameter of the work piece.
Out
W and S CAN TURN IT BETTER, FASTER, FOR LESS...WITH A WARNER & SWASEY
He Didn't Wait for a Tool Room Arbor!
J. H. Medling, with the Aro Equipment Co., Cleveland, developed a relatively simple plug to hold small diameter washers quickly and accurately without losing valuable time waiting for a special arbor to be made up in the tool room. The accompanying drawing shows operator Medling's "Idea for Victory"—an idea which may be helpful to other operators. Many operators are resourceful and ingenious in finding ways to produce more finished pieces on their turret lathes.
Many of these ideas are sent in by operators, to be published in "Blue Chips," a timely shop bulletin mailed regularly to turret lathe operators on our list. Are your turret lathe operators getting Blue Chips? If not, we will gladly send it to their homes.
SWASEY Turret Lathes Cleveland
Thread Milling Cutters of this type are generally designated as MULTIPLE THREAD MILLS to distinguish them from simi-lar single type thread mills. Multiple Thread Mills are used for cutting all types of screw threads and offer many ad-vantages both in accuracy and production. For example, the Multiple Thread Mill shown here is used to cut 12-pitch threads of different diameters in three places on these tractor clutch shafts (one end of which is shown).
USE BARBER-COLMAN UNGROUND THREAD MILLS
GROUND THREAD MILLS ARE BEING UNNECESSARILY ORDERED IN MANY CASES
Check your specifications! In many cases, such as screw fastenings, bolt ends, and the like, where there is no problem of leakage, or for shells, fuses and bombs, it is unnecessary to order ground thread mills. Manufacturing facilities for ground thread mills are overloaded —capacity for making UNGROUND Thread Mills is available. Further-more, Barber-Colman is now able to offer Unground Thread Mills, which, in 75% of manufacture, will produce work within the tolerances of Class III specifications ! This is due to recent Barber-Colman research and progress in heat treatment, and is limited to cutters of 1" face or less. If you are in doubt about a particular job, call for our engineer-ing consultation service.
ON THIS JOB, FOR INSTANCE .. • Here is a case where Ground Thread Mills were formerly used and have now been replaced with Barber-Colman Unground Thread Mills, still main,- taining the tolerances. The piece is a tractor clutch shaft with 12-pitch threads in three places (only one of which is shown). The cutter is run at 220 r.p.m. and production on the 11/4" dia. thread shown is 20 pieces per hour average including inspection at the machine. Accuracy on the major diameter and pitch diameter is .002" and accuracy on the lineal pitch is .0005". The cutter is 21/2" dia. by 1" face and gives 240 pieces per sharpening.
PRODUCTS; MILLING CUTTERS, HOBS, HOBBING MACHINES, HOB SHARPENING MA-CHINES, REAMERS, REAMER SHARP-ENING MACHINES, SPECIAL TOOLS
AMERICAN MACHINIST
AGE ELECTRODE FOR ARMOR WELDING HELPS GET TANKS INTO ACTION!
A new electrode for welding armor was de-veloped exclusively by PAGE to cooperate with the change-over to welded tank production. It met all ballistic tests on plates submitted to the Army Ordnance Department by the tank manu-facturers—and then went into action, having a real part in the great records that since have been set on welded tank production lines.
It is worthwhile to note that, in spite of the pressure for speed, tank welders have been well schooled in technique that wastes no elec-trode—gets maximum strength with the use of no unnecessary metal in the weld—uses every electrode right down to the holder. All users of welding rod would do well to insist on their men observing such economy today.
PAGE WELDING
ELECTRODES
PAGE STEEL AND WIRE DIVISION
Monosson, Po., Atlanta, Chicago Palsborgh, Son Francisco AMERICAN CHAIN &
CABLE COMPANY, INC.TU
M Business for Your Safe,
72
AMERICAN MACHINIST
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ON VAN NORMAN RAM-TYPE (Horizontal-Verticle) MILLING MACHINES
SPECIFICATIONS NO. 22-1.. PLAIN & UNIVERSAL Table. 43%c 10. Range: 211 longitudinal 10" cross, lb" vertical
When the operator has completed a horizontal cut on a Van Norman Ram-Type Miller, and wishes to proceed to an angular or vertical cut . . . he does not need to touch the set-up on the table. All he has to do is unclamp the swiveling cutterhead, swing it to the required position, reclamp . . and start the next cut. Only a matter of moments, compared with the time needed to reset the work. And one of the greatest sources of errors is completely avoided. This exceptional ease and convenience of operation provide gains in time, accuracy and output. So today, throughout America's war industries, Van Norman Ram-Type Millers are delivering the goods in
•IfunNormun
MILLING MACHINES
In June, 1942, Van Norman was awarded the Army and Navy E in recognition of its war production record
OCTOBER 29, I 942
great plenty . . . and in plenty of time.
SPRINGFIELD, MASS.
To BREAK the BACK of the AXIS
WHEREVER metal parts are formed and finished to take their place in the swelling flood of war materiel, Cushman chucks form a "first line of production". Cushman workers and plant facilities are stepping up output to the limit to meet war industry demands. We offer you every cooperation ... both in engineer-ing and production ... in our common effort to "break the back of the axis".
* * * * * * * *
A WORLD STANDARD For Precision
CUSHMAN CHUCK CO.
MAY 28, I 942
F011 PR E C 1 5 1 0 11
CHUCKING ENGINEERS SINCE 1862
HARTFORD; CONN.
1 I 9
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OLIVER-CONDITIONED drills last longer OLIVER No. 510 DRILL POINTER OLIVER-CONDITIONED drills last longer —and that's an important point to remember if your drills have a job to do in winning this war! With high speed tools at such a pre-mium, it is important to get maximum service, maximum accuracy from every tool. Slow, wasteful hand-con-trolled methods are out! Oliver Drillpointers, by means of high speed, completely auto-matic action, produce points that are accurate in every dimen-sion on all drills from 1/4" to 3" in diameter. They can be quickly set to produce any point angle from 82° to 160,° en-abling you to select the point that is exactly right for the mate-rial being drilled. Automatic, cam-controlled action produces the exclusive Oliver hollow-ground point with variable clearances —the point that reduces load on machines, saves drills and speeds up operations. Favorite in shops engaged in all types of munitions and aircraft production, the Oliver is their No. I Drill Saver. Make it your No. I choice for keeping every drill in your plant in war-winning condition. OLIVER INSTRUMENT COMPANY 1410 E. Maumee St., Adrian, Michigan MAY 28, 1942 1 2 3 teeest Boyar-Schultz Floor Model No. 22 Profile Grinder is taking an important place in the change-over from ordinary peace-time production to the speeded-up production for our war effort. This Grinder is used in making the tools for turning out airplanes, tanks, guns and other munitions in large quantities. Any machine tool that shortens the time required for producing tools is invaluable. A Boyar-Schultz Profile Grinder may be what you need. WRITE FOR CIRCULAR BOYAR-SCHULTZ CORPORATION 2109-F Walnut Street Chicago, Illinois
F011 PR E C 1 5 1 0 11
CHUCKING ENGINEERS SINCE 1862
HARTFORD; CONN.
1 I 9
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