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." e- k3 K$ I0 U% D# p$ i) I
Note: CS=80 9 K c; q( _6 y' G; }. e5 \1 A/ \' h4 y2 W4 j# a5 Y7 B) t5 z" V
RPM 1/8= + @8 f' l, ?) rRPM 3/4=; B' L8 b( @; H4 S$ N% c. w
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发表于 2007-11-24 20:29
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