1, Miniature bearings and shaft pillow melting together is what causes?

A: There may be fit bearing bore and shaft loose, resulting in slippage between the inner ring and the shaft of the inner ring and the shaft caused by high temperature sintering together.

Reference Solution: Depending on the bearing type, standard bearings is quenching and induction hardening heat treatment of steel with a recommended maximum operating temperature between 120-200 degrees. If the bearings need continuous operation at high temperatures, dynamic load bearing capacity may need to make adjustments. Also note that as a lubricant. Bearing materials, work environment, lubricants, etc. should be noted.

2, Everyone says general election C3 clearance. In the end is what data ah? You can specifically talk about it? How to determine how to detect?

A: The bearing clearance refers to the bearing when it is not installed, one of its inner or outer ring is fixed, then they are not fixed and either the amount of radial or axial movement when moving. According to the direction of movement can be divided into radial clearance and axial clearance. Clearance operation is (called operational clearance) the size of the rolling bearing fatigue life, temperature, noise and vibration performance impact. Radial clearance of rolling bearings are generally divided into / C1, / C2, / C0, / C3, / C4, / C5 these groups. 1,2 group belongs to a small clearance; 0 group to the standard set clearance; 3,4,5 group larger clearance group. Select Rolling clearance constituencies should be based on the product type, size, temperature, etc. used, and the tightness of the shaft and the hole with the case in accordance with the appropriate criteria to select. Of course, this is the device selection when they should determine the problem. Clearance also detected in accordance with relevant industry standards for professional testing.