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 U' m9 B2 R7 C% d9 _
Note: CS=80 9 d% y- `- A/ k# Q8 Q- i2 c4 z9 @" g1 C- y- l
RPM 1/8= $ E# K$ T& F r$ b4 [0 Z$ i9 l0 \% tRPM 3/4=$ v# v4 }; e$ U
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发表于 2007-11-24 20:29
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