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. 4 r4 K+ {6 D0 \1 \; ^6 i1 t, F- {Note: CS=80 ! S* m4 F, r3 H5 Y% T R1 e" q. F7 q2 ^: d) n, q
RPM 1/8= 3 u4 l! M1 C& @, B3 {2 ^RPM 3/4=" Y. F8 A9 M! e+ T1 @- @
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发表于 2007-11-24 20:29
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