What is the primary reason for heating the bearing housing before liner pouring?

Heating the bearing housing before liner pouring is primarily done to enhance adhesion. When the housing is heated, it creates a more favorable environment for the liner material to bond with the surface of the housing. This increased temperature helps to improve the flow of the liner material, allowing it to fill any small irregularities or voids in the housing, and promotes a stronger bond upon cooling.

A key aspect of this process is that proper adhesion is crucial for the performance and longevity of the bearing. If the liner does not adhere well to the housing, it can lead to failures such as delamination or slippage during operation. Enhanced adhesion thus ensures that the bearing can withstand operational stresses and maintain its functionality over time.

While other options relate to important considerations in bearing design and maintenance, they do not focus on the specific impact of heating the housing prior to liner pouring in the context of adhesion, which is the primary concern in this scenario.