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.7 B8 C q4 B7 _; p- X' E
Note: CS=80 # K V1 q+ m5 {% C( Y5 E- v 3 t, E$ Y7 N$ {6 J' s s5 e) rRPM 1/8=% m" w% H. r, D
RPM 3/4= 8 K o" p' \& A; ~3 `2 b4 @ ( {& ]' b% q" c8 e' jThanks a lot.
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发表于 2007-11-24 20:29
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