Advantages of PTFE Friction Bearings

Very Low Friction Constant

The friction constant is lower than for any other solid material. Since the static and dynamic sliding coefficient are very close, no so-called stick-slip effect occurs.

Differentiation is made between dry running bearings and lubricated bearings.

For lubricated bearings, pan-shaped recesses are pressed in the PTFE sliding plate and provided with depot lubrication (silicone grease 300 medium, bridge bearing quality).

The friction constant of PTFE deteriorates in case of low temperatures, while it remains largely constant for high temperatures. The values stated by us therefore refer to the most unfavorable values of -35°C, which occur in the approval procedures.

For the sake of simplicity, the following friction constants may be assumed under optimum installation conditions:
PTFE friction bearing, unlubricated about f = 0.1
PTFE friction bearing, lubricated    about f = 0.04

Corrosion Resistance

The PTFE glide plates are absolutely corrosion resistant, resistant against chemicals and aging. The steel parts of the bearings are by standard sandblasted and provided with a zincphosphate coating.
Upon request, all usual corrosion protection processes are offered, including hot galvanizing. Versions made of special steel alloys or stainless steel are also possible.

Temperature Resistance

The range of application of our bearings is limited to those temperature ranges which are secured by official friction tests under load.

• Use at temperatures of -60°C is ensured by tests.
• Use at temperatures of over 180°C requires custom constructions / high temperature bearings.

Maintenance-Free

PTFE friction bearings are totally maintenance-free, this also applies to lubricated PTFE bearings; no subsequent lubrication is required.

Low Form Factor

Compared with other bearing types, PTFE friction bearings require only very low form factors.