In which alignment do I mount my axial deep groove ball bearings?

Single direction axial deep groove ball bearings, which are usable in case of strong axial loads in one direction, consist of a shaft washer, a housing washer and a ball-cage assembly.

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Single direction axial deep groove ball bearing
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Single direction axial deep groove ball bearing

Double direction axial deep groove ball bearings, which are usable in case of axial loads in two directions, consist of a shaft washer, two housing washers and two ball-cage assemblies.

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Double direction axial deep groove ball bearing
axial-discs-single-direction-sketch
Double direction axial deep groove ball bearing

Because of its construction, the bearings aren’t self-contained. The mounting of the bearings parts takes place separately and is therefore relatively easy.

The inner diameter of the shaft washer is minimally smaller than the inner diameter of the housing washer. The shaft washer will be fixed on the shaft; the housing washer will be fixed on the housing. In case of one direction axial deep groove ball bearings, you have to pay attention that the shaft washer abuts against a shaft shoulder or an abutment ring.

Thus, the shaft washer represents in some extent the inner ring of the bearing; the housing washer represents the outer ring of the bearing.

The shaft washer and the housing washer shouldn’t be mixed during the mounting.

As the inner diameter of the shaft washer and the housing washer differ only minimally, you should find out the dimensions with a calliper to detect clearly which one is the shaft washer respectively housing washer.

Tip: Shouldn’t you have a calliper, you can manage it as follows: You need two pointed pencils in different colors and a piece of paper. Use one of the two washers as a pattern and retrace the inner diameter with one of the pencils. After that, put the second washer accurately fitting on the developed circle and retrace the inner diameter of this washer with the second pencil in another color. Now, you can detect more clearly which of the two washers is the shaft washer (smaller inner diameter) respectively housing washer (bigger inner diameter).

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