Determination of bearing clearance

Source: China Bearing Network Time: 2013-01-25

/*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';

1. When measuring the clearance of the bearing unit, the bearing is placed on the platform; the bearing outer ring is pressed by hand; the inner and outer rings are not inclined; the left inner ring is 1/2-1 turn; Make the roller stable. Then; put the left and right columns of the roller in the upper position. Use the feeler to measure the internal clearance; its measuring orientation and measuring point are different according to the outer diameter of the bearing.
The bearing clearance of the outer ring outer diameter greater than 200mm is measured by inserting the feeler gauge between the two rows of rollers directly above the bearing and the outer circle and between the two rows of rollers in the left and right symmetrical orientation of the bearing and the inner ring; Determine the internal clearance of each bearing.
The internal clearance (R) of the bearing is: the internal clearance of the bearing measured between the two rows of rollers and the outer ring on the bearing is separated from (r1)` (r2), and the internal clearance above the bearing is set ( RT).
RT=1/2(r1+r2)
The internal clearance of the bearing measured between the two rows of rollers in the left and right symmetrical directions of the bearing and the clearance between the two rows of rollers on the left side and the outer ring are divided into rL1`rL2, The inner clearance of the bearing on the left side is set to RL.
RL=1/2(rL1+rL2)
Set the clearance between the two rows of rollers on the right side and the outer ring to the bearing internal clearance setting rR on the right side of rR1`rR2.
rR=1/2(rR1+rR2)
Find the internal clearance of the bearing by the following formula
r=1/2(RT+RL+rR)
2. The clearance of the bearing mounted on the shaft or the sleeve is measured to determine the clearance of the outer ring of the bearing when the roller is in a sagging condition. Firstly, ensure that the bearing's straight posture changes to the outer ring 1/2-1 circle; The sub-column of a roller is separated from the orientation directly below. The feel is measured with a feeler gauge; the measured portion is somewhat different depending on the outer diameter of the outer ring of the bearing.
The bearing clearance of the outer ring outer diameter greater than 200mm is measured by inserting the feeler between the two rows of rollers and the outer ring directly above the bearing and between the two rows of rollers in the left and right symmetrical orientation of the bearing; Internal clearance. The internal clearance r of the bearing is; the internal clearance of the bearing between the two rows of rollers directly under the bearing and the outer ring is set to rS1`rS2; the internal clearance above the bearing is set to rS .
rS=1/2(rS1+rS2)
The internal clearance of the bearing measured between the two rows of rollers in the left and right symmetrical directions of the bearing and the clearance between the two rows of rollers and the outer ring on the left side; the separation is set to rL1`rL2; Set the internal clearance of the bearing on the left side to rL.
rL=1/2(rL1+rL2)
The clearance measured between the two rows of rollers on the right side and the outer ring is set to R1'rR2, and the internal clearance of the bearing on the right side is set to rR.
rR=1/2(R1+R2)
Use the following formula to find the internal clearance of the bearing.
r=1/2(rS+rL+rR)
The measurement matters are measured in the internal clearance of the bearing and the bearing scale; the temperature of the measuring instrument and the component to be tested are necessary. Especially the bearing of the heating oil tank `induction heater heating device; it is necessary to measure the internal clearance. The condition of heating can be completely cooled. For example, the bearing is transported from the storage warehouse to the measurement site; the bearing temperature can be high; if the temperature of the bearing is not recognized, the clearance is performed; the measurement of the scale; the measurement result can be faulty. The clearance of a large bearing with an outer diameter of 400 mm or more on the outer ring is measured; or when the scale is used; the bearing that is unpacked may be placed on the platform for a day and night; the temperature of the homing and the ambient temperature are combined.

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