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 677
cutting edges. ^ _ Tap, Bit-brace — Tap of any kind, usually [^ T D^^^^ on all bolt taps, with shank made square to be driven by bit-brace. Tap, Echols Thread ^mm This form of tap has every other thread cutaway on each land, but these are stag-gered so that a space on one land hasa tooth behind it… … Tap, Hand, Second or Plug — The secondtap with only a small taper to thefirst two threads. Usually this tapis the last that need be used. Tap, Hand, Third or Bottoming — Tap with full thread clear to the end. Forcutting a thread clear to the bottomof a hole. Tap, Hob for Pipe Dies — A hob tap for…
Machine-shop practice
Internet Archive · UMass Dartmouth, Claire T. Carney Library · Public Domain Mark 1.0. Free to use for anything.
