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1, natural clearance of the bearing fit
Because of the bearing clearance group: 2 group 0, group 3, group 4, group 5, group all 5 clearance groups, and each clearance is not the same size of the group. Gear shafts and housings for the specific, and it matches the bearing (clearance group) is a particular. If bearing natural clearance hours will result in a bad clearance adjustment. When the bearings are of the same group, natural clearance sizes, also not conducive to clearance adjustments. Therefore, before each Assembly, should check whether natural clearance of the bearing fit.
2, the effects of ambient temperature
In the North, when the winter when the ambient temperature is low, repair slow down machine, bearing oil film freezing cold, easily lead to detection are bearing oil clearance smaller trips, if the bearing clearance measurement adjustment to the established standards, increased bearing clearance. So when we were setting the bearing internal clearance, usually with the operational clearance is less than the measured bearing clearance standards 10~20!m and run collection bearing the heat for a long time. If the bearing does not heat, then meets the technical requirements, if the bearing heat adjustment.
3, metal, gear impacts when metal wear, two parallel gear shaft is bound to change, to change gears meshing effect, causes the center of gravity offset. When this happens, the gear shaft on either side of the shaft tolerance uneven uneven symmetric result in bearing clearance, which affect the adjustment of the bearing clearance. At this point, you can use metal grinding metal or replaced to serve the intended purpose. When a bad gear, gear caused by bad, can cause gear shaft on either side of the shaft tolerance does not directly result in bearing clearance of not even symmetric, thus affecting the bearing clearance adjustments. Therefore, we usually put gear box in the back, idle 3~5min, adjust them again.
4, the effect of bolt tightening method
In practice, we found that if bearing the same side of the bolt, and then tighten the bolt on the other side, is bound to make both sides of the bearing clearance varies, thus reducer in the operation of the vibration caused by the big, reduced bearing service life. Therefore, when the fastening bolts must be both preload and tightening again, before they can be ideal for bearing clearance.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 33022U NTN | 110 | 170 | 47 |
| 32022XU NTN | 110 | 170 | 38 |