Features

By agreement, Schaeffler can supply plain bearings in materials other than those stated in the product descriptions. These have differing characteristics and areas of application.

In the case of spherical plain bearings, Schaeffler offers a glass fibre reinforced plastic as a sliding material, in the case of metal/polymer composite plain bearings the maintenance-free special material E421 or the plain bearing material E60 for film bearings.

These maintenance-free special materials conform to the regulations for lead-free plain bearings as stated in the Technical Principles.

Maintenance-free material E421

E421 is a two-layered metal/polymer composite comprising a steel supporting body with a plastic composite layer made from PTFE. The particularly thin-walled material facilitates very small design envelopes. Possible products include bushes, flanged bushes, thrust washers, strips and special designs in accordance with customer requirements.

Structure

The material comprises a steel backing and a sliding layer, ➤ Figure. As standard, the steel backing is protected against corrosion by a zinc coating.

Maintenance-free plain bearing material E421

Sliding layer ·

Steel backing ·

 Zinc coating as surface protection

Layer thickness

The sliding material is available with a layer thickness of 0,5 mm.

Technical data for E421

For the important mechanical and physical characteristics of the maintenance-free plain bearing material E421, see table.

Data

Plain bearing material E60 for film bearings

E60 is the new plain bearing material from Schaeffler for maintenance-free film bearings. The metal/polymer composite comprises a bronze rib mesh that is filled with a dry lubricant made from polytetrafluorethylene PTFE. This dry lubricant contains embedded chemically non-reactive additives.

Structure

The material comprises a rib mesh and a sliding layer, ➤ Figure.

A sliding layer made from PTFE is rolled and sintered into the rib mesh. The mesh thus functions as both a carrier and a sliding layer.

Maintenance-free plain bearing material E60

 Rib mesh ·

 Sliding layer

Rib mesh and sliding layer

Film thickness

The plain bearing material is available in a film thickness of 0,5 mm.

Technical data for E60

For the important mechanical and physical characteristics of the maintenance-free plain bearing material E60, see table.

Data

Glass fibre reinforced plastic

A glass fibre reinforced plastic plate GFRP with additives of PTFE offers a sliding layer with a very long operating life, for example for the large spherical plain bearing GE..-DF-G9, ➤ Figure.

Due to the larger sliding layer thickness, this bearing offers a longer wear life compared to bearings with other sliding materials.

The sliding material can be lubricated and is suitable for low as well as high sliding velocities. The operating life can be increased even further by initial lubrication and occasional relubrication.

Examples of applications include ladle turrets or mills, since greater clearance is permissible here and loads tend to act in one direction only.

Axial spherical plain bearings are also available by agreement with a glass fibre reinforced plastic plate, ➤ Figure.

Large spherical plain bearing GE..-DF with hard chromium/ GFRP sliding contact surface

 Sliding layer comprising GFRP and PTFE

Axial spherical plain bearing with hard chromium/ GFRP sliding contact surface

 Seal ·

 Lubrication hole

Technical data for GFRP

For the important mechanical and physical characteristics of the plain bearing material GFRP, see table.

Data