1. Over-greasing
- Excess grease can become trapped within the bearing, causing increased heat and friction.
- This is particularly problematic in high-speed bearings.
- Result: Energy loss, bearing overheating, grease escaping the bearing.
2. Under-greasing
- Insufficient lubrication leads to metal-to-metal contact.
- Result: Wear, pitting, premature bearing failure.
3. Incorrect grease selection
- Using the wrong NLGI, viscosity, or base oil:
- Too viscous grease for high speeds → overheating
- Low temperature resistance → melting or bleeding
- Incorrect additives → damage to bearing surface
- Result: Shortened bearing life.
4. Grease contamination
- Dust, dirt, water, or chemicals mix into the grease.
- Result: Increased friction, accelerated wear, grease degradation.
5. Incorrect application method
- Excessive or insufficient manual application
- Incorrect dosage or blockages in central systems
- Result: Irregular lubrication, hot spots on the bearing surface.
6. Inappropriate lubrication interval
- Too long an interval → grease ages and loses its lubricating effect
- Too short an interval → unnecessary lubrication, excessive heating
7. Ignoring high temperatures or environmental factors
- If ambient temperature or heat generated by the motor/machine is not considered, the grease can melt or bleed, rendering lubrication ineffective.
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