Lubrication selection affects bearing temperature, friction, wear and service intervals. Grease or oil must be selected for the bearing type, speed, load, temperature, sealing arrangement, contamination exposure and relubrication method.
Grease and Oil Lubrication
Grease is commonly used where a simple contained lubricant system is suitable. Oil lubrication may be used where speed, heat removal, circulation or system design requires it. The equipment and bearing documentation should define the lubricant type and method.
Lubrication Selection Factors
- Bearing type, size, speed and load
- Operating temperature and ambient conditions
- Seals, housings and contamination exposure
- Grease consistency, base oil viscosity and compatibility
- Relubrication access, interval and lubricant quantity
Common Lubrication Errors
- Mixing incompatible greases without a documented compatibility review
- Overfilling a housing and increasing operating temperature
- Using too little lubricant or missing a relubrication interval
- Allowing contamination or water to enter through damaged seals
Related Bearing Selection
Lubrication requirements should be reviewed with the bearing configuration, including deep groove ball bearings, cylindrical roller bearings and spherical roller bearings. Correct mounting and fit are also important; review the installation guide when applicable.
FAQ
Can I add grease to a sealed bearing?
Do not relubricate a sealed bearing unless the bearing documentation and housing design specifically allow it.
How much grease should be used?
The correct quantity depends on the bearing, housing, speed and lubrication method. Follow the equipment or bearing documentation.
Request a Lubrication Review
Send the bearing reference, speed, load, temperature, existing lubricant and relubrication method through our inquiry page.