Methods of machine shop work : for apprentices and students in technical and trade schools (1914)
Halsey, Frederick A. (Frederick Arthur), 1856-1935 · New York : McGraw-Hill · leaf 217
DRILLING 207 The driving of the spindles is by the mechanism shown in Fig.193. Each spindle carries above its bearing an offset crank,the spindles being driven in common by a crank plate
Machine-shop practice
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
