Limitations of Greases
1. Heat removal is not efficient
2. Dirt removal is difficult
- Grease is not re-circulated and filtered
- Purging may be helpful
- Cleanliness/lubrication frequency are key
3. Requires special equipment to apply
- More powerful pumps/largerlines
- Grease guns
- Automatic lubricators
Advantages of Greases
1. Provide good sealing
- Keeps dirt and water out
- Less dripping and splattering
2. Excellent for many high temperature operations
- Does not "thin out"
3. Ideal for intermittent operations
- Will not drain away when operation stops
- Speed changes, reverse direction
4. Load carrying ability
- High pressure / low speeds / shock loading
- Solid lubricant additives: moly, graphite
5. Aid to mechanical operation
6. Can be "fine-tuned" to an application
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