Contents
When does oil filling in a worm gear make sense?
Maintenance
1. Oil vs. Grease Filling
The choice of lubricant in the worm gear of a screw jack is crucial for the performance and longevity of the system. Engineers are often faced with the decision of whether to use grease or oil as a lubricant. Both options have specific advantages and disadvantages that need to be considered depending on the application.
Oil filling in a worm gear
2. Grease Filling
Grease filling is a common choice for many standard applications listed in the catalog. It allows for a drive speed of up to 1500 rpm and provides sufficient lubrication for most applications without compromising the longevity of the system.
2.1 Pro and Cons
Cons
✘ Limited speed: At higher speeds, especially above 1500 rpm, grease loses its lubricating effect. Due to the high speed, a tunnel forms around the lubrication points, leading to insufficient lubrication.
✘ Heat dissipation: Grease has lower thermal conductivity than oil, resulting in poorer heat dissipation.
Pros
✔ Easy handling: Grease is less fluid and therefore easier to handle and apply.
✔ Lower risk of leaks: Due to its consistency, there is a lower risk of leaks compared to oil.
✔ Good adhesion: Grease adheres well to lubrication points, providing consistent lubrication.
3. Oil filling
Oil filling is preferred when higher operating speeds of up to 3000 rpm are required. Oil is more fluid and can provide effective lubrication even at high speeds.
3.1 Pro and Cons
Cons
✘ Risk of leaks: Due to its liquid nature, the housing must be additionally sealed, which adds to the cost.
✘ More complex handling: The handling and application of oil can be more complex and often require special seals and equipment.
✘ Separate spindle lubrication: Screw jacks with a lifting spindle and grease lubrication are self-supplied with grease from the housing. However, the oil housing prevents this, so separate lubrication for the spindle is required.
Pros
✔ Higher speeds: Oil remains fluid even at high speeds and does not form a tunnel around the lubrication points, ensuring constant lubrication.
✔ Better heat dissipation: Oil dissipates heat more efficiently, leading to better cooling of the system and increasing the performance of the screw jack.
Want to know more?
Lubrication
Have you ever wondered how to extend the lifespan of your electromechanical systems and reduce maintenance costs? Here, you'll find everything you need to know about adequate and proper lubrication.
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