Four point bearing

Features of four point bearings

Four point bearings are similar in design to single row angular contact ball bearings, but unlike these, can support axial forces in both directions. Due to the design of the rolling element raceway geometry results in radial load of the four-point bearings, a contact of the rolling element at four points of the raceways. Due to the design of the rolling element raceway and the higher number of rolling elements compared to angular contact ball bearings, four point bearings have a higher load carrying capacity than single row angular contact ball bearings in a similar design envelope. Four-point bearings usually have a split bearing ring.

Load

With increasing axial load on the four-point bearing, the radial load carrying capacity decreases. With pure radial load, four-point bearings should not be used due to the higher internal friction compared to radial deep groove ball bearings. About the values for the load capacity of the bearing, our service team will be happy to provide information.

To keep the friction of the four-point bearing as low as possible even at high speeds, a minimum axial load is necessary. Thus, a ratio of Fa > 1.2Fr should be given in continuous operation.

Accuracy

The dimensional and running tolerances of the four-point bearings normally correspond to the tolerance class P0 according to DIN 620-2.

Vierpunktlager
Vierpunktlager

 

Bearing Clearance

The four point bearings are designed in the standard with the bearing clearance class CN according to DIN 620-4.

Sealing

Four-point bearings are usually designed with dust covers or RSR sealing washers. Depending on the installation space, Sealing systems are also possible.

Cages

Four-point bearings can be equipped with Plastic or metal cages.

Materials

The four-point bearings are made in your standard version from the material 1.3505 (100Cr6) and manufactured with a minimum hardness of 58 HRC. On request, corrosion protected versions are available.

Vierpunktlager Kraft
Four-point bearing load directions
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