American machinists' handbook and dictionary of shop terms : a reference book of machine shop and drawing room data, methods and definitions (1914)
Colvin, Fred H. (Fred Herbert), 1867-1965, Stanley, Frank A. (Frank Arthur), b. 1874 · New York : McGraw-Hill book company ; London : Hill · leaf 606
ue or it will cause the work to move in an eccentric path. Center Punch — Punch for marking points p^ ^^^sm^ ° metal. Made of steel with a sharp ^ ^^^m -—> point and hardened. Often called a prick punch. Center Punch, Automatic — Has a spring actuated hammer in thehandle, which is released when… … Center Punch, Bell or Self-centering — A center punch sliding in a bell or conemouthed casing so when placed squareover the end of any bar it will locatethe center with sufficient accuracy formost purposes. Center Punch, Locating — Having an extra leg which has a spring point and is adjustable. The…
Machine-shop practice
Internet Archive · UMass Dartmouth, Claire T. Carney Library · Public Domain Mark 1.0. Free to use for anything.
