SKF Four-Point Contact Ball Bearings QJ 308 N2MA

SKF Four-Point Contact Ball Bearings QJ 308 N2MA

Four-point contact ball bearings are radial single row angular contact ball bearings with raceways that are designed to support axial loads acting in both directions. Radial loads can be supported up to a certain fraction of the axial load. These bearings take up considerably less axial space than double row bearings.

SKF four-point contact ball bearings of the QJ design have a contact angle of either 35° Or 45° . The inner ring is split. This enables a large number of balls to be incorporated in the bearing thus giving the bearing high load carrying capacity. The bearings are of separable design, I. E. The outer ring with ball and cage assembly can be mounted separately from the two inner ring halves.

Both inner ring halves of SKF Explorer four-point contact ball bearings have a recessed shoulder. This improves the oil flow when the bearing is used together with an SKF cylindrical roller bearing. In addition, these recesses can be used to facilitate dismounting...
- basic design bearings
- sealed bearings
- bearings with a two-piece inner ring
- large bearings for heavy engineering applications with two-piece inner or outer ring

The standard range is shown in matrix 1. The matrix is also valid for bearings in the 52 A and 53 A series, which have the same performance characteristics and dimensional features (except for the width of size 5200).

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