High temperature of the fan’s self-aligning bearing
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The temperature of the air handler blower’s bellows is 14 degrees. After replacing the bearings and running the unit for 120 hours, the bearing temperature rose slowly from 26 degrees to 48 degrees. (For the fourteen blowers of the same type, the bearing temperatures are all between 20 and 30 degrees.) The bearing housings were inspected, and it was found that there was no lack of oil and that the retaining rings were not loose. I would be very grateful if experts or experienced users could help identify the cause of this issue.
If there is no damage, it may be an excess of glycerin, which can also raise the bearing temperature. However, these temperatures are all within the normal range. For reference.
The belt is tight. The self-adjusting swing amount of the bearing is no longer present.
48 degrees is not a problem. . . It’s fine as long as it’s not over 70 or 80 degrees
Over 40 degrees isn’t considered high; check whether the bearing tension is too high
It rose another 2.5 degrees today; it’s really strange.
Was the set screw tightened too much? Thank you.
What is the fit between the gland and the outer ring of the bearing?
Looking at the picture, quite a lot of grease has been added. Also, is the pre-tightening force of the bearing cover too high?