CNC题目,又再请教。

27149

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.
Note: CS=80

8 t6 V$ r/ [$ U* H0 @& PRPM 1/8=
' e* K2 F8 ]" BRPM 3/4=

Thanks a lot.

27149

up
up