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.9 D; U- A# ~ d
Note: CS=80 7 x5 s/ Y8 h3 B ( X) ]8 x4 Q; ^4 k5 BRPM 1/8=0 d# g5 u" }" T
RPM 3/4=# A2 Q) Z3 u5 y8 q I' K% n4 R
) K, ]# K6 P- ~8 P) {; G6 c
Thanks a lot.
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发表于 2007-11-24 20:29
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