Application of Bearings
Bearings
permit smooth, low-friction movement between surfaces. This movement may be
Rotary (shaft rotating within a mount)
Linear (one surface moving along another).
They are anti-friction devices, having different anti-friction
characteristics. Most of the bearings are oil-lubricated.
Application Guidelines
- Ball bearings are the less expensive in the smaller sizes and for
lighter loads, while roller bearings are less expensive for larger
sizes and heavier loads.
- Roller bearings are preferred for shock or impact loading.
- Ball-thrust bearings are for thrust loading only.
- Deep-groove or angular-contact ball bearing for high speeds.
- Self-aligning ball bearings and cylindrical roller bearings with
low friction coefficients.
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Speed requirements are important factors for proper
bearing application design. Useable speeds are influenced by bearing size,
properties, lubrication and operating temperatures. The permissible speed
varies inversely with mean bearing diameter. Moreover bearings are generally
used for applications that have no impact or shock. Bushings are used for
applications that feature more shock
