Select Mounted Ball Bearing Unit Type View Technical Specifications
Relubrication
To maximize bearing life, be sure you relubricate units with a NLGI #2-compatible grease at intervals recommended for your application. Optimal intervals are based on the dn* value (inner ring diameter in mm x speed in RPM) and operating environment of your application.
General guidelines include:
| dn* Value | Environmental Conditions | Operating Temperature (F) | Interval |
|---|---|---|---|
| Up to 40,000 | Ordinary | 5 to 150 | 6-12 months |
| Up to 40,000 | Ordinary | 150 to 210 | 2-6 months |
| 40,000 to 70,000 | Ordinary | 5 to 150 | 2-6 months |
| 40,000 to 70,000 | Ordinary | 150 to 210 | Monthly |
| Up to 70,000 | Dirty | 5 to 150 | Weekly to Monthly |
| Up to 70,000 | Dirty | 150 to 210 | Daily to 2 Weeks |
| Up to 70,000 | Very Dirty | Any | Daily to Weekly |
| Up to 70,000 | Very Dirty | Any | Daily |
* d – inner ring diameter (mm); n = speed in RPM
Grease Fill Amounts
Relubricating bearings with the appropriate grease fill amount is critical to bearing life. For optimal distribution, apply lubricant through the grease fitting under low pressure during slow shaft rotation. Be careful not to overfill the bearing because it can cause seals to overheat and unseat.
Grease fill amounts should be based on your application experience. General guidelines include:
| Bore Size | Grease Amount |
|---|---|
| Up to 1" | 1.5 – 2 grams |
| 1 1/8 to 1-1/2" | 2.5 – 3 grams |
| 1 7/16 to 2-7/16" | 4 – 5 grams |
| 2 1/2 to 3-1/2" | 7 – 8 grams |
