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 }9 P! r; ^( Y' O% K
Note: CS=80 . ]" o( l0 L* w$ q3 a$ c) i2 v! J0 q7 k- Z, n/ _( g% G; v
RPM 1/8=# r w7 R6 P; C, |8 U7 i5 h
RPM 3/4=1 I/ a% w' m. h/ E