Klein UNIBIT Step-Drill Bit Sharpening Instructions

29. Calculate the best wire size and the measurement over the wires for the following threads: a. ¼ in.—20 NC b. 5/8 in.—11 NC c. 1¼ in.—7 NC. 30. What is the purpose of a multiple thread? Multiple threads are used when it is necessary to obtain an increase in lead and a … ................
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