Precautions for installation and debugging of mechanical parts of CNC machine tools: 1. Precautions for installation and debugging of spindle bearings (1) Installation and commissioning of a single bearing When assembling, try to make the eccentricity of the spindle positioning inner hole and the spindle shaft diameter and the eccentricity of the bearing inner ring and the raceway as close as possible, and make them in the opposite direction, so that the eccentricity after assembly can be reduced. (2) Installation and debugging of two bearings When installing the two supported spindle bearings, the eccentricity direction of the front and rear two supporting bearings should be the same, and the eccentricity should be properly selected. The accuracy of the front bearing should be one grade higher than that of the rear bearing to minimize the eccentricity of the front end positioning surface of the assembled main shaft components. When disassembling the main shaft bearing for repairing machine tools, because the original manufacturer has adjusted the eccentric position of the bearing, it is necessary to mark the position in the circumferential direction before disassembly, so as to ensure that the original relative position of the bearing and the main shaft remains unchanged after reassembly, and reduce the damage to the main shaft parts. Influence. When assembling the bearings with interference fit, hot or cold installation should be used for installation. Do not knock them violently, so as not to damage the bearings during the installation process and affect the performance of the machine tool.  

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