The Way Of djustment Of Bearing Clearance

(1) Adjustment of bearing axial clearance

The inner ring of the bearing is positioned by the shaft shoulder, the outer ring is preloaded by the bearing glands on both sides, and the axial clearance of the bearing is adjusted by the preloading force of the bearing glands on both sides. If it is reduced, there should be a certain clearance in the axial direction of the bearing. There is no relevant national standard for the axial clearance of the bearing.

In practice, the axial clearance is less affected by factors such as interference assembly and load operation. Therefore, during installation, the original clearance of the bearing is generally adjusted as the standard.

Specific adjustment method: In the case that the reducer is not covered with a cover, install the shaft assembly in place, tighten the gland bolts on both sides of the bearing in place, and then apply a certain axial pressure on one end of the shaft. The magnitude of the axial force can refer to the axial force that the shaft is subjected to during operation, and then use a feeler gauge to measure gap 1 and gap.

 After the measurement is completed, calculate the sum of gap 1 and gap 2, and compare it with the original clearance measured by the bearing. In comparison, ensure that the difference between the two is within ±40μm. If the requirement cannot be met, it can be adjusted by adding an adjustment shim until the requirement is met.

(2) Adjustment of bearing radial clearance

The radial clearance of the bearing plays a vital role in the stable operation of the bearing, and for the radial clearance of the bearing, GB/T4604-2006 has relevant standards, so in the specific application, just look up the table to know The upper and lower limits of the radial clearance of the bearing.

 The specific adjustment method: In order to facilitate the measurement, the glands on both sides of the bearing should be removed before adjustment, the bearing should be installed on the bearing seat, cover the upper cover, and the four fastening bolts on both sides of the bearing should be tightened evenly with a torque wrench. The force can refer to the relevant provisions of the national standard. After tightening it in place, use a feeler gauge to measure it, and compare the measured value with the standard value of the look-up table.

Example: Bearing type 23232CC/W33. According to GB/T4604-2006, the maximum radial clearance of the bearing is 110μm, and the minimum value is 75μm. Adjust the bearing clearance by comparing the results. If the adjustment value is less than the minimum value, it means that the installation clearance of the bearing is too small, and the clearance should be increased, as shown in the bearing installation diagram (axial). Copper sheets can be placed in the bolt holes of the upper and lower joint surfaces of the bearing housing for adjustment. If the adjustment value is greater than the maximum value, it means that the bearing installation clearance is too large.

The adjustment method is to put copper skin on the joint surface of the bearing housing and the bearing outer ring for adjustment. Be careful not to block the oil hole of the bearing when placing the copper skin. The above methods generally require multiple adjustments to adjust the bearing radial clearance within the standard range. After the clearance adjustment reaches the standard, re-install.

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