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allowed American Machinist angle babbitted bearing blades blank bored broach teeth Broaches For Hole broaches shown broaching machine broaching press bushing carbon steel chip clamped clearance corners cutter cutting edge cutting teeth diameter dimensions Grinding dimensions dividing head drawhead finishing broach fixture flats frustum gage gear give grinder grooves hardening hexagonal hole high-speed steel holder hydraulic press indexing keyseats keyway broach Lapointe Machine Lathe dimensions Grinding length load per tooth machine shown material steel means metal Metalwood method milled notches operation pieces per hour pitch planer plate pull push broaches reamer rectangular rods roughing round broach round hole screw set of broaches setscrews shape shown in Fig side six-spline sizes slide slot space spindle spline broaches square broaches square hole stroke surface grinder Table tailstock tool type of broach universal joints wheel width
Page ii - FO R_> Coal Age v Electric Railway Journal Electrical World •* Engineering News-Record American Machinist ^ Ingenieria Internacional Engineering 8 Mining Journal * Power Chemical 8 Metallurgical Engineering Electrical Merchandising COAL MINING COSTS BY AT SHURICK MEMBER AMERICAN INSTITUTE OF MINING ENGINEERS, FORMERLY ASSOCIATE EDITOR "CoAL AGE,
Page 63 - A- in-i 21 in. long, material steel. No. 3 Machine. Production 20 pieces per hour. No. 3. SQUARE HOLE. Distance across flats 1 in., 1J in. long, material steel. No. 2 Machine. Production 40 pieces per hour. No. 4. FOUR SPIRAL KEYS. Diameter of hole 1 in., keys J in. X i in., 2 in. long, material steel. No. 3 Machine. Production 15 pieces per hour. No. 5. CLUTCH USED ON MINING MACHINERY. Diameter of hole 2| in. Double depth of slots 3j in., length 2 in., material steel.
Page 39 - SI nickel steel, a good grade of cutting oil will give satisfactory results. On some work, no drilling whatever is done prior to broaching, and very often only one broach is used, but if the work is longer than say two inches, a roughing broach usually precedes the finishing broach. Of course, broaching from the rough can. only be done when the broaching operation comes first, as otherwise the broach would follow the rough hole and, consequently, the finished hole would be out of true with any other...
Page 63 - XA m-> 3 in. long, material steel. No. 4 Machine. Production 15 pieces per hour. No. 13. SQUARE HOLE. 1 » in. across flats, 5 in. long, material steel. No. 3 Machine. Production from drilled hole, 15 pieces per hour. No. 14. UNIVERSAL JOINT PART. Hole 2fg in.
Page 63 - ... steel. No. 4 Machine. Production from drilled hole, 15 pieces per hour. No. 11. THREE DOVETAIL SPLINES. Diameter of hole 1| in., splines 1 in. XA in., 2 in. long, material brass. No. 3 Machine. Production 45 pieces per hour. No. 12. EIGHT DOVETAIL SPLINES. Diameter of hole 3| in., splines J in.
Page 213 - Ib. per square inch pressure on sides of splines. No allowance is made for radii on corners or for clearances.
Page 63 - Distance across flats 2 in., length 3g in., material steel. No. 3 Machine. Production from a drilled hole, 15 pieces per hour. No. 10. SQUARE HOLE. Distance across flats 3 in., length 4 in., material steel. No. 4 Machine. Production from drilled hole, 15 pieces per hour. No. 11, THREE DOVETAIL SPLINES. Diameter of hole 1| in., splines 1 in. XA m-> 2 in.
Page 65 - Hole If in. diameter, J in. long, 20 teeth, material steel. No. 3 Machine. Production from drilled hole 90 pieces per hour. No. 30. Two SPIRAL KEYWAYS. Diameter of hole 2 in., keyways | in.
Page 65 - X j in., 1 in. long, material drop-forged steel. No. 4 Machine. Production 35 pieces per hour. No. 28. BRONZE BUSHING. Hole if in. diameter, 1} in. long. No. 3 Machine. Broached to exact size, compressed and burnished. Production from cored hole 100 pieces per hour. No. 29. MAGNETO COUPLING. Hole 11 in.
Page 39 - Fig. 23, which illustrates two connecting-rods and their broaching fixture. The small end of one rod and the large end of the other are broached simultaneously and one complete rod is finished for every stroke of the machine. The fixture is not absolutely necessary but adds considerably to the production. These connecting-rods are first drilled to the size of the broach shank or to a diameter of from 0.015 to 0.018 inch under the required size. They are then finished by broaching, thus eliminating...