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 629
Flat I^) 6oo DRILLS — Continued … Shell DriU — Shell drills are fitted to a tapershank and used for chucking out coredholes and enlarging holes drilled witha two-flute twist drill. The angle ofthe spiral lips is about 15 degrees. Straight Flute Drill — The straight flute, or Farmer drill as it isfrequently called after its…
Machine-shop practice
Internet Archive · UMass Dartmouth, Claire T. Carney Library · Public Domain Mark 1.0. Free to use for anything.
