Plain bearings

During motion, shear friction is formed on the contact surface.

Advantages: 
Simple structure 
Small diameter (but large length!) 
Simple assembly 
Quiet operation (for high revolutions) 
Withstanding impact loading

Disadvantages: 
Precise manufacturing 
Expensive (deficient) materials 
Higher-quality lubrication (= higher maintenance requirements, more complicated operation) 
High lubricant consumption

Calculation: 
Same as for shaft pivots

Structural design

Basic components are a bearing housing and a casing.

A number of contradictory requirements are placed on the casing material:
Jamming aspect 
Price 
Friction intensity 
Lubricant wettability 
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

Materials:

• Metallic materials 

Lead and tin composition 
Tin, lead, and tin-lead bronze 
Brass 
Aluminium bronze 
Aluminium compounds 
sintered materials (18 280, 18 344), grey iron (42 24 15, 42 24 56).

• Non-metallic materials

PTFE materials 
Polyvinyl acetate materials 
Polycaprolactam materials 
Harden-fabric materials (fabric + resin) 
Hygroscopic-resistant rubber

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.