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Commonly used positioning method of bearing ring

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61820-RS SKF Bearing

Positioning of bearing inner ring

When installing the inner ring of the bearing on the shaft, the position of the bearing is generally fixed on one side of the shaft shoulder, and the other side is fixed with a nut, a stop washer or a spring ring. The dimensions of the contact part of the shaft shoulder and the axial fixed parts with the inner ring of the bearing can be determined according to the installation dimensions of the various bearings listed in the bearing size table.

(1) Nut positioning

When the bearing rotates at a high speed and bears a large axial load, the end face of the nut and the inner ring of the bearing should be perpendicular to the rotation center line of the shaft. Otherwise, even if the nut is tightened, the installation position of the bearing and the normal working condition of the bearing will be damaged, and the rotation accuracy and service life of the bearing will be reduced. Especially when the fit between the inner bore of the bearing and the shaft is a loose fit, strict control is required.

In order to prevent the nut from loosening during rotation, appropriate technical measures must be taken to prevent loosening. Use the nut and the stop washer to locate, put the inner key teeth of the stop washer into the keyway of the shaft, and then bend one of the teeth on the outer ring into the notch of the nut.

(2) Spring retainer positioning

In the case that the bearing bears little axial load, the speed is not high, the shaft is short and it is difficult to process the thread on the journal, the elastic retaining ring with a rectangular section can be used for positioning. This method is convenient for loading and unloading, occupies a small space, and is simple to manufacture.

(3) Positioning of thrust washer

When the journal is short, it is difficult to process threads on the journal, the bearing speed is high, and the axial load is large, the washer can be used for positioning, that is, the washer is used for positioning on the shaft end surface with more than two screws. The stop washer or wire is tightened to prevent loosening.

(4) Adapter sleeve positioning

The bearing speed is not high, and the spherical roller bearing that bears a smooth radial load and a small axial load can be installed on the optical axis with the aid of a tapered adapter sleeve. The adapter sleeve is positioned with a nut and a stop washer. Use the friction force of the nut to tighten the adapter sleeve to locate the bearing.
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calendar Until 14/04/2021 07:00:00 expired

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