1. Tangential component:

The tangential component Ft is a useful component. Because it transmit power. Using the value of Ft , the magnitude of torque and transmitted power can be determined.

2. Radial component:

The radial component Fr is a separating force which is always directed towards the centre of the gear. Fr does not really a useful component. It is also called as transverse force or bending force.

The torque transmitted by gear

Design Procedure For Spur Gear:

1. Calculation of gear ratio;

2. Selection of material

Consulting Table 5.3, knowing the gear ratio i, choose the suitable material.

3. If not given, assume gear life (say 20000 hrs)          

Design Procedure For Helical Gear: