This drive consists of a pinion of straight teeth and a rack of helical teeth.
Normal module mn = 2 mm
- Helix angle B1 = 0 deg.
- Tooth number Z1 = 15
- Pitch circle dia. D1 = 30 mm
- Helical teeth, B2 = 30 deg.
Angle between pinion axle and rack moving direction is L = B1 + B2 = 30 deg.
1 pinion revolution makes rack move Pi.D1.cosB1/cosB2 = 108.83 mm