Assembly and Adjustment of Double Row Cylindrical Roller Bearings
Double row cylindrical roller bearings belong to linear contact bearings, whose bearing capacity and stiffness are higher. They are often used in medium, large and heavy machine tool spindle systems. Those sytems’ load is large, the stiffness is high and the speed is relatively low. Next, Dalian Guangyang, a bearing manufacturer in China, will share with you the assembly adjustment method of Chinese cylindrical roller bearings used in spindle systems.
Selection of double row cylindrical roller bearing
If there are manufacturing errors in the spindle and bearing of Chinese cylindrical roller bearings. It will inevitably affect the rotation accuracy of the spindle assembly.
(1) Front bearing selection: Because the radial runout of the main shaft at the front support has the greatest impact on the rotation accuracy of its end, so the bearing selection method should first be used to reduce the radial runout of the front support.
（2）Rear bearing selection: After the front bearing selection, the rear bearing selection can further improve the rotation accuracy of the spindle assembly.
Clearance (clearance) of double row cylindrical roller bearing and its adjustment
The clearance amount (clearance amount) of the rolling bearing has an important effect on the working performance of the spindle assembly. Also the bearing life. When the bearing works in a large clearance, it will cause the spindle position (radial or axial) offset and directly affect the machining accuracy. In addition, the stiffness and vibration resistance of the spindle assembly of Chinese cylindrical roller bearings are also greatly weakened. When the bearing is adjusted to zero clearance, the bearing area increases accordingly. The force condition of the rolling body tends to be uniform. And the rotation accuracy of the spindle can be improved. Therefore, keeping a reasonable clearance of rolling bearings is an important measure to improve the rotation accuracy. Also stiffness and vibration resistance of the spindle assembly.