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 85
The body of thehollow drill acts as a packing, compelling the oil to follow the groovesand the chips to flow out through the hollow shank. Three and four groove drills are used for chucking out cored holesor enlarged holes that are first drilled with a two-groove drill. Theyare much better than a… … TYPES OF DRILLS 57
Machine-shop practice
Internet Archive · UMass Dartmouth, Claire T. Carney Library · Public Domain Mark 1.0. Free to use for anything.
