Four Point Contact Ball Bearings

Four point contact ball bearings resemble in their construction a pair of single-row angular contact ball bearings in O-arrangement and thus also double-row angular contact ball bearings. Four point contact ball bearings - they have only one row of balls- thus save significantly on installation space in the axial direction. Because of their geometry, they are especially suited to absorbing high axial forces from changing directions.

Special bearings

• Coated bearing
• Thin-section four point contact ball bearing
• Customer-individual construction

Sizes of manufacture

Individual manufacture beginning at outer diameter of 250 mm - serial manufacture even at the smallest diameters.

Designs

• With inner ring split in radial direction (QJ)
• With outer ring split in radial direction (Q)

Bearing rings materials

Roller bearing steel (Standard)

Rolling elements materials

Roller bearing steel (Standard)

Cage materials

Brass, sheet steel

Main dimensions

The main dimensions of the standardised four point contact ball bearing comply with the details in DIN 628-4

Dimensional and running accuracy

We manufacture four point contact ball bearings in tolerance class normal and tolerance class P6 as per DIN 620-2.

Bearing clearance

We manufacture four point contact ball bearings with bearing clearances C2, normal, C3 and C4 as per the details in DIN 628-4, up to individually limited clearance classes. The values apply to non-built-in bearings with zero measurement load.

Contact angle

Usually 35°

Lubrication

The bearings are not greased and can be lubricated with grease or oil.

Connection to adjacent construction

Positive locking shaft-hub Connection