Questions about bearing fits?
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Our unit is equipped with a single-stage cantilever centrifugal oil pump; two sets of angular contact ball bearings are used on the side of the bearing housing that is close to the motor, while one set of deep groove ball bearings is used on the side close to the impeller. How are these two sets of angular contact ball bearings typically matched together? Face to face, back to back, or in series?
Back-to-back installation yields better results than face-to-face installation
Our factory uses back-to-back installation for the melt pumps, and the results are excellent
It is not convenient to lubricate when they are face to face, and it is also not easy to disassemble them in that position
When installed back to back, it works well; but when installed face to face, the result is not good
All I’ve seen are those installed back to back
They are generally installed back to back; other configurations are less common
The six forum leaders had a serious discussion, sharing their understanding of the structural forms of bearing assemblies, drawing on their practical experience from their respective organizations； From effective lubrication to easy disassembly, everyone agreed that a back-to-back installation yields good results. Given the actual circumstances of the discussion, it can be assumed that there is a correct answer to the question, and the post category can be changed to “Solved”.
A set of deep groove ball bearings is used on the side close to the impeller? Why not a roller bearing with a living inner ring?
Roller bearings are expensive; deep groove ball bearings are much cheaper
Experience shows that back-to-back installation is better!