Brief introduction of tower crane slewing bearings

Turntable bearings of tower cranes are also called slewing bearings, indispensable and important accessories of tower cranes, which are able to bear axial load, radial load and overturning torque. Turntable bearings of tower cranes usually have mounting hole, internal gear, outer gear, lubricating oil and sealing devices, that can make slewing mechanisms of tower cranes have compact structure, reliable guide and easy maintenance.

Slewing bearings of construction tower cranes have various types, such as no teeth type, outer teeth type, internal teeth type four points contact ball bearings, double row angular contact ball bearings, bearings with cross roller, crossed tapered roller bearings and three row cylindrical roller bearings. The four-point contact ball bearing has high static load capacity; crossed cylindrical roller bearing has high dynamic load capacity; crossed tapered roller bearing pre-loaded can make through the bearing has great support rigidity and high rotation accuracy. When tower cranes work, slewing bearings can connect tower crane body with hoisting jibs, and turn to let tower cranes work stably.