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.2 t8 f- q( u( o3 u% u0 M# e
Note: CS=80 % b0 U6 v$ n" v# R2 U. ^% ?* e2 ?( T
RPM 1/8=& |+ Y% l) i+ _4 n
RPM 3/4=8 C! |5 k3 ^6 m) t' J
0 A6 k) e# A6 \
Thanks a lot.