Bearing covers shield the exposed ends of pillow block, flange, and other mounted bearings from dust, debris, and accidental contact, extending bearing life while helping equipment meet machine guarding requirements. A flange bearing cover typically bolts directly to the bearing housing using the same mounting holes as the bearing itself, so no additional drilling or fabrication is needed to install one. 3BG Supply Co.’s bearing cover lineup includes 2-, 3-, and 4-bolt flange configurations in both lightweight and heavyweight materials, including our 3-bolt flange bearing cover and 4-bolt flange bearing cover options, so MRO teams can match bolt pattern and duty rating to their existing bearing housing. Because a properly fitted bearing cover keeps contaminants out of the bearing seal, it can meaningfully reduce unplanned bearing replacements on exposed equipment. Browse our full machine guards selection for shaft covers, backplates, and other guarding styles as well.
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FAQs
What is a bearing cover used for?
A bearing cover shields the exposed end of a pillow block, flange, or other mounted bearing from dust, debris, and accidental contact, protecting the bearing seal and helping equipment meet machine guarding safety requirements. It typically bolts directly over the bearing housing without requiring separate fabrication.
How do I know which flange bearing cover fits my bearing housing?
Match the bolt pattern (2-, 3-, or 4-bolt), bolt circle diameter, and overall housing size to your existing bearing, since flange bearing covers are designed to reuse the same mounting points as the bearing itself. Checking your bearing's housing type and size before ordering avoids a mismatched fit.
What's the difference between a lightweight and heavyweight bearing cover?
Lightweight bearing covers use thinner material and suit lower-exposure, less abrasive environments, while heavyweight bearing covers use thicker material for more demanding conditions with higher contact risk or debris exposure. Both styles mount the same way; the choice comes down to how much physical protection your application needs.
Are bearing covers required for OSHA compliance?
OSHA's machine guarding standards generally require guarding for rotating parts that pose a contact hazard, and exposed bearing housings on accessible equipment often fall under that requirement. A bearing cover is a straightforward way to guard these points without interfering with bearing performance or maintenance access.
Can a bearing cover be removed for maintenance without disturbing the bearing?
Yes — bearing covers are designed to bolt on and off independently of the bearing itself, so maintenance teams can remove the cover for lubrication, inspection, or bearing replacement without disturbing the bearing's mounting. Reinstalling the cover afterward restores the same level of protection.
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