. Railway mechanical engineer . Fig. 1—Simplified Warner & Swasey Clutch Tap and Die Holder struction of this tool, as shown in Fig. 2, and all the prin-ciples of an older model embodying 23 parts are incorpor-ated. Either right or left-hand dies or taps can be held in thenew holder which thus becomes two tools in one. To change from right to left, a screw-driver is the only toolrequired. After releasing the small tightening screw, the restcan easily be done with the hands. The only difference in. Fig. 2—View Showing Parts of Clutch Tap and Die Holder the tool when used for right or left-hand
. Railway mechanical engineer . Fig. 1—Simplified Warner & Swasey Clutch Tap and Die Holder struction of this tool, as shown in Fig. 2, and all the prin-ciples of an older model embodying 23 parts are incorpor-ated. Either right or left-hand dies or taps can be held in thenew holder which thus becomes two tools in one. To change from right to left, a screw-driver is the only toolrequired. After releasing the small tightening screw, the restcan easily be done with the hands. The only difference in. Fig. 2—View Showing Parts of Clutch Tap and Die Holder the tool when used for right or left-hand work is in the posi-tion of the pawl. To change from one to the other, the pawlit turned half way around in its hole, a small pin holdingthe pawl in whichever position it is placed. When threading on a turret lathe, the pawl holds the toolrigid by a metal to metal contact, until the turret stop isreached. Then the head moves forward on the work, pullsthe cam over the pawl and releases the head, thus allowing August, 1921 MEl HANK \l- ENGINEER 527 it to revolve freely. The spring cushions the pawl so thatthe release is without jar and practically noiseless. Thematerial in each part has been carefully selected and designedto stand the work required of it. Arrangements have been made for the easy cleaning and oiling of the tool which in-sures reliability of operation and long life. This clutch tapand die holder is valuable for use in machine shops, particu-larly on brass work. Gaso
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
