. Railway mechanical engineer . Fig. 2—Parallels Aid Setting Up Back End Brass making motion work pins and bushings, rod bushings (whenthe boring mill is busy), wrist pins, and miscellaneous pins,guide blocks, etc. A wide range of work is handled, sufficientto keep the lathe busy practically eight hours a day. Second-hand engine truck axles are annealed, cut in twowith the torch, and machined into wrist pins and knuckle. Fig. 3—Modern Engine Lathe Machining Wrist Pins pins, as shown in Fig. 3. The pins are standardized asmuch as possible in thread size and crosshead fit, being leftl-i in. larg
. Railway mechanical engineer . Fig. 2—Parallels Aid Setting Up Back End Brass making motion work pins and bushings, rod bushings (whenthe boring mill is busy), wrist pins, and miscellaneous pins,guide blocks, etc. A wide range of work is handled, sufficientto keep the lathe busy practically eight hours a day. Second-hand engine truck axles are annealed, cut in twowith the torch, and machined into wrist pins and knuckle. Fig. 3—Modern Engine Lathe Machining Wrist Pins pins, as shown in Fig. 3. The pins are standardized asmuch as possible in thread size and crosshead fit, being leftl-i in. large for the running fit in the main rod front enables wrist pins to be manufactured in quantityfor a given type of locomotive at a considerable saving inthe cost of production. June, 1922 RAILWAY MECHANICAL ENGINEER 303 The jx)\ver of the lathe is evidenced by some of the rough-ing cuts taken on these engine truck axles. In spite of be-ing annealed they are more or less hard and a cut 1 1/32 , or a 2 1/16 in. reduction in diameter is made with acutting speed of 35 ft. per min. and 1/16 in. feed. Underthis comparatively heavj- duty no vibration is noticed andthe thrust collars do not run warm. Fig. 3 shows the axleafter it has been partially worked up into four wrist pins. The open side planer, illustrated in Fig. 4, has also se-cured warm supporters at Hoboken owing to its flexibility,flower and r
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
