Spherical roller bearings thrust bearings and tapered, face to face or back to back is usually mounted to the axial position of one bearing ring to determine the internal clearance or preload. Clearance and preload choice depends on the bearing arrangement performance and health requirements. It exists between this type of bearing axial clearance and radial clearance fixed relationship, as long as a certain value are met, the axial clearance is usually sufficient. Starting from zero clearance condition, tighten the shaft by unscrewing or mother, or adjusting pads back on the bearing outer ring thickness, you can obtain the specified clearance.

3. Detection clearance

Bearing radial clearance check available several methods. The easiest way to check is to be checked by hand rotation of the bearing. Install the correct bearing smooth rotation flexibility, no braking phenomenon; another inspection method hand shaking bearing outer ring, even if there is a radial clearance of 0.01mm, the uppermost point of the bearing should have 0.01 ~ 0.15mm shaft the amount of movement. This method is only suitable for checking single row radial ball bearings, other types of bearings are not very effective.

Bearing radial clearance can also be used to detect the thickness gauge. Measured between the feeler insert not bear the load bearing parts of the rolling element and the outer (or inner). This method is widely used to detect self-aligning bearings and cylindrical (cone) roller bearings.

Bearing radial clearance can also be used to detect a dial indicator. Detection, the bearing outer ring from the top, with a dial indicator measurement.

After installation to be detected bearing clearance is to install clearance. Installation clearance equal to the original clearance by subtracting the installation of the clearance decrease the value.

Rolling clearance, some adjustable, some not adjustable. Bearing clearance adjustable angular contact ball bearings, tapered roller bearings, thrust ball bearings and thrust roller bearings. The remaining categories of bearing clearance not adjustable.

Clearance is not adjustable bearing assembly and use of the process anyway after check clearance. According to test results decide whether you need to reinstall, repair, or replacement.

Adjustable bearing for clearance, after the installation and use of the process should be adjusted. By using the process of adjustment, can partially compensate for bearing wear caused by the bearing clearance is increased.

The bearing clearance can be described, such as tapered roller bearings, both radial clearance have axial clearance, but also a certain geometric relationship between the two. Thrust bearings, the axial clearance only have practical significance.