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. ( J/ F. g9 y# s* F+ w d! p$ \Note: CS=80$ F. N3 l- M7 U& L; J: f2 n
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RPM 1/8=' `) m; f5 L, l
RPM 3/4= `" C' T/ g6 y6 ^