Precision Twist 5/16" Taper Length Drill 135 Deg Cobalt L 6 3/8" Flute 4" Precision Twist taper length drill bits have longer flutes and a longer overall length than jobber twist drill bits, which allows for deeper drilling. The shank diameter is the same as the drill bit size. High speed steel drill bits are for use with a wide variety of materials including steel, cast iron, and forgings.
Tricks & Secrets of Old-Time Machinists: Hints and Kinks Provided by the Readers of American Machinist Magazine in 1915 and 1916, Volume 2, originally published in American Machinist Magazine, compiled, edited and published by Lindsay Publications, 2008. 5 1/2 x 8 1/2 paperback, 96 pages. ISBN 1-55918-371-3.
Tricks & Secrets of Old-Time Machinists: Hints and Kinks Provided by the Readers of American Machinist Magazine in 1915, originally published in American Machinist Magazine, compiled, edited and published by Lindsay Publications, 2009. 5 1/2 x 8 1/2 paperback, 96 pages. ISBN 1-55918-383-7.
Maybe never used, near perfect condition. Seller pays actual shipping plus fair packing charges. RPML 300 uses a solid box section cast iron bed, very rigid and very heavy.
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