Feed Speed Formula

Rpm x no. of teeth      x     chip load  =  Feed Speed

12 (inches per foot)

Known:

No. Of Teeth -------  60

RPM ---------------  3600

Chip Load ----------  0.005”

Example:

3600 x 60   =    216,000   =  18,000 x .005   =  90

     12                     12

Feed Speed is 90 feet per minute