Tooth Quantity Formula

Formula

Feeds speed (fpm)   x   12     =   no. of teeth

Rpm x chip load

Known:

Feed Speed -----------   90 fpm

RPM ------------------- 3600

Chip Load ------------    0.005”

Example: 60

      90 x 12      = 1080   = 60

3600 x 0.005        18

No of Teeth is ---------- 60