When mechanically installing a bearing on a shaft, where should the hammer not be used directly?

When mechanically installing a bearing on a shaft, it is essential to avoid using a hammer directly on the bearing itself. The reason for this is that bearings are precision components designed for smooth operation and minimal friction. Applying direct force from a hammer can cause damage to the inner race or rolling elements of the bearing, potentially leading to misalignment or premature failure of the bearing.

Instead, when installing a bearing, it is preferable to use a proper bearing installation tool that applies even pressure on the outer race. This ensures the bearing is seated correctly without causing any deformation or damage. Utilizing a hammer can introduce shock loads that compromise the bearing's integrity.

Using appropriate methods, such as heat to expand the housing or utilizing a press, can ensure successful installation without risking damage to critical components. The focus should always be on maintaining the precision and functionality of the bearing during installation.