Permaglide Plain Bearing

Product Description

Permaglide plain bearings are bearings for very small radial or axial design envelopes. These products are available as bushes, flanged bushes, thrust washers and strips and in two groups of materials. The bushes are available not only in metric sizes but also in inch sizes.

Bushes, washers and strips are supplied in the maintenance-free Permaglide P1 or the low-maintenance P2. Flanged bushes are made from the maintenance-free Permaglide P1.

Embodies the product characteristic of a permanently, low-wear gliding. By applying a plastic material onto a metallic base alloy, a low friction matrix that unites favourable tribological properties with the load carrying properties and thermal conductivity of metals is obtained. The use of solid lubricants in the plastic matrix makes it possible to use Permaglide bearings in applications without oil- and grease lubrication.

Depending upon customer requirements and specific applications, a number of maintenance-free and low maintenance materials are available with identical microstructure. A porous bronze sinter structure applied to a steel or bronze back and is impregnated with the respective plastic mix. The solid lubricant produces a film between the sliding surfaces. It attributes to low-noise operation at constant speeds and low coefficients of friction throughout the entire service life of the component. This is achieved by means of a mixture of PTFE (Poly Tetra Fluoro Ethylene) with wear-retardant and thermally conductive additives.

It is not possible to find the desired solution for plain bearing applications with products made of maintenance-free materials for all duties and applications. For such duties and applications, low-maintenance materials are available. In this case, the sliding surface

taking up the wear load is formulated from a PVDF (Polyvinylidene Fluoride) matrix.

To reduce the coefficient of friction and improve thermal conductivity, special additives are mixed into the matrix. In addition, the surface of the sliding layer may optionally be equipped with lube bore relieves to accommodate grease or oil.