During motion, shear friction is formed on the contact surface.
Small diameter (but large length!)
Quiet operation (for high revolutions)
Withstanding impact loading
Expensive (deficient) materials
Higher-quality lubrication (= higher maintenance requirements, more complicated operation)
High lubricant consumption
Same as for shaft pivots
Basic components are a bearing housing and a casing.
A number of contradictory requirements are placed on the casing material:
Good thermal conductivity
There are 2 standardised types of bearing casings:
- Casing made completely of the bearing material
- Casing made of two materials – basic material and lining
Lead and tin composition
Tin, lead, and tin-lead bronze
sintered materials (18 280, 18 344), grey iron (42 24 15, 42 24 56).
Polyvinyl acetate materials
Harden-fabric materials (fabric + resin)
There are numerous renowned manufacturers of plain bearings (casings) on the market. Each of them uses own marking of types and materials, while maintaining some established marking practices such as inner diameter, length or outer diameter.
We will be pleased to help you identify plain bearings used by you, or replace them with types supplied by our company.