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How Important Bearing Clearance Is

How Important Bearing Clearance Is

2021-08-10

The so-called bearing clearance, also known as bearing clearance, refers to the amount of movement when the bearing is not installed on the shaft or bearing box, and one side of its inner or outer ring is fixed, and then the side of the bearing clearance is not fixed to do radial or axial movement.According to the direction of movement, it can be divided into radial clearance and axial clearance.The operating clearance (called working clearance) has an impact on the rolling fatigue life, temperature rise, noise, vibration and other performance of the bearing.

Bearing clearance standard query

C3 -- Radial clearance of radial bearing, larger than standard clearance;

MC3 -- Radial clearance standard clearance for small and micro ball bearings.

Details are as follows:

C1 -- Radial clearance of radial bearing, smaller than C2 clearance.

C2 -- Radial clearance of radial bearing, smaller than standard clearance.

CN (omitted) -- Radial standard clearance of radial bearing.

C3 -- Radial clearance of radial bearing, larger than standard clearance.

C4 -- radial clearance of radial bearing, larger than C3 clearance.

C5 -- radial clearance of radial bearing, larger than C4 clearance.

CC1 -- Radial clearance of cylindrical roller bearings (non-interchangeable), smaller than CC2 clearance.

CC2 -- Radial clearance of cylindrical roller bearings (non-interchangeable), smaller than standard clearance.

CC -- Radial standard clearance for cylindrical roller bearings (non-interchangeable).

CC3 -- Radial clearance of cylindrical roller bearings (non-interchangeable), larger than standard clearance.

CC4 -- Radial clearance of cylindrical roller bearings (non-interchangeable), greater than CC3 clearance.

CC5 -- Cylindrical roller bearings (non-interchangeable) radial clearance, greater than CC4 clearance.

MC1 -- Small, micro ball bearing radial clearance, less clearance than MC2.

MC2 -- Small, micro ball bearing radial clearance, less clearance than MC3.

MC3 -- Radial clearance standard clearance for small, miniature ball bearings.

MC4 -- Small, micro ball bearing radial clearance, greater clearance than MC3.

MC5 -- Small, micro ball bearing radial clearance, greater clearance than MC4.

MC6 -- Small, micro ball bearing radial clearance, greater clearance than MC5.

CM -- Radial clearance of deep groove ball bearings, cylindrical roller bearings for motors.

CT -- Radial clearance of cylindrical roller bearings for motors

Common clearance adjustment methods

1. The backlash of cylindrical and oval bearing bush can be adjusted by manual grinding and scraping or the method of trimming and scraping after dividing the face with cushion in the bearing.2, the top gap of cylindrical and oval bearing bush can be adjusted by manual scraping or when the situation allows.3, for many oil wedge fixed bearing bush, in principle, it is not allowed to repair scraping and adjust the bearing bush clearance, the clearance should be replaced when the new tile.4. For multi-wedge tilting bearing bush, scraping tile is not allowed. When the gap is not suitable, the tile should be replaced.For the tile with adjustable thickness, the tile quantity can be adjusted by adding a stainless steel pad under the tile back adjustment block, or by reducing the thickness of the adjustment block.Pay attention to the multi-wedge tilting bearing bush, the thickness error between the same group of tiles should be less than 0.01mm.

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