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Friction/Running-in characteristics - Electrical/chemical properties - Machinability

Properties siliding bearing material

Electrical and chemical properties

Electrical properties

The sliding layer, made of POM, enables GLYCODUR® A sliding bearings to function as an electrical insulator.


In order to avoid electrostatic char-ging, affected components must be appropriately grounded.

Chemical properties

The chemical properties of GLYCODUR® sliding bearings are mainly determined by the steel backing layer and the tin bronze sinter layer, because the sliding layers are resistant to many chemicals. The top layer of GLYCODUR® F bearings is virtually inert, due to the PTFE material used, it can be attacked by molten alkaline metals or by free fluorides at elevated temperatures.

The POM top layer of GLYCODUR A bearings is resistant to organic substances.

The tin bronze sintered structure is resistant to seawater, water vapor, atmospheric effects, salt solutions and sulfuric acids at room tempera-ture, but is not resistant to oxidising acids and media containing ammoni-um hydroxides.


All exposed surfaces on the steel backing are tin plated; but in most applications there is only limited protection against corrosion. In the event the bearings are exposed to corrosive media, or a risk of contact corrosion between the steel backing of the bearing and the housing material exists, the backing may be protected by a Ni, Cr, or Zn layer. Further details are available upon request.

Under dry sliding conditions, there is no lubricant to provide protection against corrosion. Special attention must be paid to the corrosion properties of the mating material.

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