Cyclopedia of mechanical engineering; a general reference work. Editor-in-chief Howard Monroe Raymond. Assisted by a corps of mechanical engineers, technical experts, and designers of the highest professional standing (1908)
American School (Chicago, Ill.), Raymond, Howard Monroe · Chicago American Technical Society · leaf 81
MAClliJ<E SHOP WOKK. 55 oil slioiild he used. On brass the use of oil is unnecessary,wliile c-ast iron slioulil always be tapped dry. DIES. Dies are n.scd for t-utting threads on bolts and other siniihiiparts to be placed in holes which have been threaded by taps. … Fig. 78. The general rules given for the use of taps apply to dies. As thenumber of threads iu a die is much less than on a tap, and be-cause the chips have a much freer exit, it is not as necessary toback up a die as it is a tap. Dies for small work areusually made solid, as shownin Fig. 77, and…
Mechanical engineering
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