Practical answer
The correct initial quantity depends on bearing free space, housing free volume, speed and operating temperature. High-speed positions normally require closer control of fill ratio and enough space for excess grease to move or purge.
Use a metered tool for relubrication and record quantity and interval. Greases with different base oils, thickeners or additive systems should not be mixed without checking compatibility and cleaning requirements.
On-site checks
- Bearing size and available housing volume
- Speed, temperature, load and start-stop frequency
- Condition of grease inlet and purge path
- Base oil, thickener and viscosity of the existing grease
Record for enquiry or analysis
- Complete grease designation
- Quantity per service and relubrication interval
- Temperature before and after relubrication
- Leakage, thrown grease, discoloration or hardening
Suffix rules and allowable values vary by manufacturer. Confirm the final selection against current manufacturer documentation and actual machine conditions. Reference entry points:NSK · Schaeffler medias