Question

Why number of collars is provided on the shaft for flat collar bearing carrying axial load?

Answer 1

Answer:

A collar bearing is a kind of thrust bearing. They always have suitably formed faces to resist the axial pressure.

Explanation:

In thrust bearing, the load moves along the axis of the shaft like in the turbine shafts.  The number of the collars bearing vary according to the shaft.The collars of the bearing tend to catch the movement of the shaft in the axial direction.  These are accommodated and engage with the thrust block's surface correspondingly.