Bearings in high speed rotation, especially close to or exceed the size of the table speed recorded speed limit; the main should note the following:

(1) The use of precision bearings;

(2) Analysis of the bearing internal clearance (taking into account the temperature rise generated by the bearing internal clearance reduction);

(3) Analysis of the type of material the cage (for high-speed rotation, suitable for cutting copper alloy or phonetic resin cage system. There is also a high-speed rotation of the synthetic resin molded cage);

(4) Analysis of lubrication (for use on high-speed rotation of the circulation lubrication, spray lubrication, oil mist lubrication and oil lubrication.