A 1/8 inch pilot hole followed by a 3/4 inch dia hole to be drilled in end of a 3.875 inch dia shaft.Calculate the RPM of each drill. * I! ]8 k t$ i' [% G5 b. n1 M) r* |Note: CS=80* W8 B" |7 J: {- M
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RPM 1/8= 3 l. s f, v/ ?% }3 d, B0 HRPM 3/4= 0 Y+ ?! Q$ I& I$ G: _- ~/ P/ R" C3 G" y; A
Thanks a lot.