Turntable bearings are precision bearings featuring a specialised structure that integrates support, rotation, transmission, and fixation functions. They are capable of simultaneously withstanding combined loads including axial loads, radial loads, and overturning moments. These bearings predominantly employ a design with negative clearance and preload, ensuring high rigidity and rotational precision.

Typically, the inner and outer rings of a slewing bearing incorporate mounting holes, lubrication ports, and sealing structures, catering to diverse installation requirements across various equipment under precision operating conditions. Characterised by compact design, high rotational accuracy, and straightforward installation and maintenance, slewing bearings primarily comprise three major categories: YRT slewing bearings, ZKLDF slewing bearings, and cross-roller bearings.

These three series share identical mounting dimensions, though their internal structures differ, with comparable performance characteristics.