A gear wheel has 36 teeth (Z) and 3 mm module (m). Its pitch diameter is :

12 mm

75 mm

80 mm

108 mm

Transmit large torque

Provide large speed reduction from worm shaft to worm wheel

Transmit higher speeds

Provide large speed reduction from worm wheel to worm shaft

The work is fed in the same direction as the rotation of the cutter

Chip removal starts at the thickest part

Machine with backlash eliminator is essential

The work is fed against the direction of the cutter rotation

24, 12

8, 6

7, 5

3, 2

8 Degree

12 Degree

20 Degree

28 Degree