To clear chip

To give lubrication

To measure the work

To get sufficient time to feed

To change speed

To transmit torque

To transmit temperature

To increase horse power

Splash method

Force feed method

Gravity feed method

Pressure feed method

10 Degree

2 Degree

15 Degree

20 Degree

Involute spline

Parallel key spline

Serration

Ball spline