1. Determine operating conditions
- Bearing type and size
- Speed (rpm) and DN value
- Load type and magnitude (radial, axial, or combined)
- Operating temperature (average and maximum)
- Environmental effects: Dust, water, chemical effects, vibration
2. Base oil selection
- Synthetic base oils (PAO, ester, polyalphaolefin) offer advantages at high temperatures and high speeds.
- Mineral base oils are cost-effective and suitable for moderate speeds and temperatures.
3. Thickener
- For long-life and high-temperature resistant greases:
- Lithium complex or aluminum complex
- PFPE-based greases for very high temperatures
- The thickener ensures mechanical stability of the grease and its retention on the bearing surface.
4. Additives
- Anti-wear (AW/EP)
- Antioxidants → protect against oxidation and degradation
- Low conductivity additives (for inverter motors)
- Water repellent additives → humid environments
5. NLGI and viscosity
- NLGI grade 1–2 is suitable (0–1 for high speeds)
- Base oil viscosity must be appropriate for bearing speed and temperature.
6. Application and quantity
- Use the correct amount of grease (30–50% of bearing void)
- Centralized lubrication or circulating systems ensure a longer lifespan
- Regular maintenance and avoiding contamination increase lifespan
Please contact us for technical support regarding solutions suitable for your business.
