As an important component of machine tools, turntables have always been the focus of machine tool design. As a key component for carrying workpieces, the turntable's rotation accuracy, rigidity and combined load-bearing capacity directly affect the processing performance of machine tools. Among them, the selection of bearings plays a direct and decisive role. The traditional solution for turntable bearings generally uses two or more groups of radial and thrust bearings in combination, in order to enable the turntable to withstand axial loads, radial loads and overturning moments at the same time. Although this solution is mature, it also has disadvantages such as complex turntable structure design and inconvenient bearing installation and maintenance. 

The HRT series of high-precision turntable bearings breaks through the traditional bearing selection and arrangement. One set of bearings can meet the requirements of the turntable to withstand combined loads, greatly simplifying the structure of the turntable and reducing design, installation, maintenance and costs. The combination of a set of radial rollers and two rows of axial thrust roller retainer assemblies makes the structure compact and saves space for the overall structural design of the turntable; the bearings are provided with mounting holes, making installation extremely convenient; the bearings are preloaded before leaving the factory, and high rigidity and high rotation accuracy can be achieved without adjusting the clearance; the inner and outer rings of the bearings are provided with oil filling holes, which is convenient for regular oil filling and maintenance; the rotation accuracy of HRT turntable bearings can reach up to 1.5μm, which is much higher than that of ordinary bearings.