Matching of bearing outer ring and bearing seat
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Our company has a motor from ABB, and the bearings used are skf6319M/C3. After half a year of operation, abnormal noise was discovered. After inspection, it was found that there was a bit of outer ring running. The measurement showed a gap of 0.035mm. I would like to ask if the prawns meet the specifications? What are the assembly specifications?
It should be an interference fit, about 10 lines
The standard should be a transition fit, and the measured value around the tolerance K7 is too large.
Need a setting? Just spray it and you should be able to check the specific gaps, they are standard.
The gap is not too big, let’s spray it
I would like to ask clearly, how is the spraying method done?
I saw that the machinery factory seems to do this, using CuSO4 electrolysis, coating it with a layer and then grinding it
The gap is about 3.5 wires, which is not too big. Proofing and punching holes around the bearing chamber should solve the problem of sleeve running. If it doesn't work, I'm going to spray it.
The gap is not too big and can be processed after spraying or proofing and punching to maintain operation.
What kind of bearing seat is it? If it is a split type, add copper after pressing the lead, and ensure that there is 3 to 5 wires of interference. After operation, observe the effect and then adjust. If it is an integral bearing seat, the processing will be a little more troublesome. Either you insert it, or you spray it, or you make a sample and punch it, add steel glue, put it into the bearing and wait for it to solidify before running. The purpose is to restore the designed matching size.
No need to spray, just pockmarking the inner ring of the bearing seat will work!
What is running outside the circle? How to check the clearance standards between the inner and outer rings of bearings?
There is also a bearing retaining glue that you can try.
Use a sample punch to evenly make a circle of small holes, and then apply bearing curing agent to try the effect.
I think the outer ring can be pressed tightly, and the interference is 0.1mm.
The rolling coefficient is definitely much smaller than its friction coefficient