Geared slewing ring include external tooth and internal tooth four-point contact ball bearings, double-row ball bearings, crossed cylindrical roller bearings, and three-row cylindrical roller bearings
When selecting the type of slewing rings, the following factors need to be considered:
When precise positioning is a key operating parameter, cross roller slewing bearings are usually used.
The size of the load is one of the factors that determine the bearing size. Generally, four-point contact ball slewing rings bearings can withstand heavy loads and impact loads. They are suitable for applications where the magnitude and direction of the load will change.
3. Operating temperature
In most cases, the allowable operating temperature of the slewing rings bearings mainly depends on the gasket and sealing material used for lubrication. The allowable operating temperature range is -25 to +70°C.
For applications involving vibration, preloaded four-point contact ball slewing rings bearings and crossed cylindrical roller slewing rings bearings are suitable.
5. Running speed
The friction force generated by the four-point contact ball slewing rings bearings is smaller than that of the cross cylindrical roller slewing rings bearings. The four-point contact ball slewing rings bearings also has a higher speed.
Sealing is critical to the performance of slewing rings bearings. Qualified seals used in slewing rings bearings can provide good moisture and pollution protection, and can ensure the role of grease.