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. O/ z" {7 E0 E, d, Y
Note: CS=80 ; s8 W, z+ b; b; }& o3 b% D3 I( M- X& b9 G: D
RPM 1/8=/ A4 ~/ i6 H3 _1 V7 v
RPM 3/4=6 C, g0 l# f' _% P4 H8 L0 s7 F
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发表于 2007-11-24 20:29
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