Machine tool spindle bearing is the core plate of IBC. Machine tool spindle bearing is a special angular ball bearing specially designed for machine tool spindle. Its main characteristics are high precision and high speed, which can provide good shafting rigidity to meet the needs of precision machining of machine tool. At present, it has high-precision angular ball bearings, assembly angular ball bearings, universal angular ball bearings, honey sealed angular contact ball bearings, etc., which are widely used in precision machine tools, CNC machining centers, etc. The machine tool industry will always be the leading industry of IBC.