Bearing on the bearing, directly in contact with the shaft portion of the shaft has to withstand the load and relative motion. To reduce friction, wear and tear on the bearing material of demands, in addition to required coefficient of friction between the friction, wear-resistant outer shall meet the following points:

1 should have sufficient compressive strength, fatigue strength and resilience. Bearing alloy thickness (0.013-0.13) mm.

2 anti-adhesions is good. When the load is large, high speed, bearing clearance is too small; the surface finish is not high, poor lubrication, pay attention to match the carefully selected materials, to prevent friction wear adhesive glue.

3 have the flexibility and the ability to accommodate the foreign body. Low hardness, good ductility and low coefficient of elasticity of the material has good flexibility and the ability to accommodate the foreign body.

4  good corrosion resistances, low prices and sources enough.
 
A commonly used material

Bearing and bearing liner materials commonly used metal materials and non-metallic materials are divided into two categories.

Metal materials:

1 cast iron

Ordinary gray cast iron, cast iron, ductile iron

Suitable for low speed light load, or open the drive bearings

Mechanism: material in sheet or spherical graphite components, covering the surface to form a lubricant layer of graphite.

2 bearing alloy

ZChSnSb10-6 anti-corrosion, anti-bonding capability, combined with the steel back to prison, expensive, heavy for high-speed, such as rolling stock.

ZChPbSb16-16-2 anti-bonding ability, thermal expansion, poor, medium speed for crisp contained.

This Babbitt wears resistance, anti-glue, a large thermal conductivity, make the most suitable bearing material.



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