Wear on the oter race and bearing housing cap
Wear on the oter race and bearing housing cap
(OP)
Over the last few months I have witnessed a large number of bearing being changed during routine maintenance, for wear appearing on the outside, of the outer race and bearing housing caps. Upon inspecting the bearing and cap, it would appear that the bearing has been rotating in the housing and wearing a groove into the bearing cap. I understand that there is a lot of factors to consider why this could be happening, such as clearances, torque setting, shaft run out and so on and so.
I'm asking if anyone has experiencing this problem, and is the a way to detect it?
I'm asking if anyone has experiencing this problem, and is the a way to detect it?





RE: Wear on the oter race and bearing housing cap
In the machines I deal with, we very rarely see evidence of an outer race spinning in the housing. This usually happens as a result of a bearing failure. It is more likely a consequence than a cause.
Johnny Pellin
RE: Wear on the oter race and bearing housing cap
Spherical Roller Bearings
Belt Driven Fan running 2735rpm
Routinely greased
RE: Wear on the oter race and bearing housing cap
The keys to avoiding these failures are to mount the bearing correctly on a shaft with low run-out and a rotor with a good balance. Apply the correct grease in the correct amount at the correct frequency.
Johnny Pellin
RE: Wear on the oter race and bearing housing cap
http://www.rpsindustries.in/wp-content/uploads/201...
Or, mounted between the bearings ?
http://www.fanair.in/images/products/blower-and-fa...
Got pictures of the worn bearings and housings?
I'm guessing the blower is heavy, and overhung and mounted outboard of the bearings on the horizontal shaft.
I also guess the housing that wears is the bearing close to the belt drive, and the belt pull is close to horizontal
The usual reason for worn housings is improper fit for the application, which lets the bearing creep in response to loading that changes direction.
RE: Wear on the oter race and bearing housing cap
I hope to have some more information on this issues later today.
RE: Wear on the oter race and bearing housing cap
Preventing bearing creep with that configuration is not usually a catalog solution.
RE: Wear on the oter race and bearing housing cap
RE: Wear on the oter race and bearing housing cap
For prevention, I'd be inclined to install the outer race with some slow-curing Loctite applied to its OD, and a few rotations of the fan while the bearing cap is being torqued down, to allow any necessary self-alignment to take place. Nowadays, I tend to use Loctite PST for everything, because it's not too weak, not too strong, visually apparent, and I just carry the one tube.
Mike Halloran
Pembroke Pines, FL, USA
RE: Wear on the oter race and bearing housing cap
The other should be allowed to "float" to accommodate axial thermal expansion.
Gluing the fixed bearing outer race in the housing might cause an axial load problem.