John Jacob Holtzapffel · digital reprint by www.CircuitousRoot.com · leaf 463
FOR THE MANDREL. 437 are numerous objections. In all heavy cutting, when the work is shifted round from point to point by the index, then every time thus lightly fixing the mandrel gives a stability that annuls all vibration sometimes felt when such work is held by the index alone, with… … screw is unimportant except when fig. 469, is employed as a substitute for the division plate or to give the angular positions to the chucks. For these purposes as one turn of the screw is equal to the 180th part of the complete rotation of the mandrel, the various divisions on the work result from…
Ornamental turning
Internet Archive · Dr. David M. MacMillan · Public Domain Mark 1.0. Free to use for anything.
