I have a conveyor line that has had several premature bearing failures. These failures have been on both open lube bearings and sealed bearings. The line is relatively new 18 mos. at most and does not run all the time, I would estimate 16-24 hrs per week, yet I have had 6-8 bearing fail in the last several months.

Product on this line is cured polyurethane foam and is very light weight.

Hi DHH89,

Bearings normally require minimal load to have the rolling elements (such as balls) roll on to the raceways of the rings (inner and outer rings). If the grease is thick, chances are the balls will not roll but instead skid which can be one of the causes of premature failures. I have no idea about the grease you are using. And if the grease is not thick then there are other factors like sealing for moisture ingress. Have you checked the failed bearings if there are signs of corrosion? Especially for outdoor application and low temperature environment. Check the grease if it has an additive which addresses moisture ingress.

Cheers,
francko

Hi DHH89,

If the bearing failed due to contamination like moisture ingress, you should maintain the optimum level of grease inside the bearing to insure that the bearing is protected from contamination.

Regards,

Danny

My simple suggestion is get a hacksaw and cut the bearing and look at the raceway so you have some evidence on what cause your bearing to fail.

My Warm Regard,

Rolly Angeles
www.rsareliability.com