Miniature bearings and shaft melting together What is the cause?

A: There may be a bearing bore with the axis of the loose, resulting in slip between the inner ring and shaft caused by high temperature so that the inner ring and shaft together.
Solution: Depending on the type of bearing, standard bearings are hardened and induction hardened heat treated steel, the proposed maximum operating temperature between 120 to 200 degrees. If the bearing is to be operated continuously at high temperatures, the dynamic load capacity of the bearing may need to be adjusted. Also pay attention to the role of lubricant. Bearing materials, work environment, lubricants, etc. should be noted.

Generally speaking, we choose C3 clearance. What is the data in the end ah? Specific to talk about? How to determine how to detect?

A: The bearing clearance refers to the bearing in the absence of installation, the inner or outer ring of a fixed, and then not fixed to do a radial or axial movement of the amount of movement. According to the direction of movement, can be divided into radial clearance and axial clearance. The running clearance (called the working clearance) affects the rolling bearing fatigue life, temperature rise, noise, vibration and other properties of the bearing. Radial bearing radial clearance is generally divided into / C1, / C2, / C0, / C3, / C4, / C5 these groups. Group 1 and 2 belong to small clearance; Group 0 is the standard group; Group 3, 4 and 5 have larger clearance group. The choice of rolling bearing clearance group according to the product type, size, temperature and the use of shaft and hole with the degree of tightness in accordance with the appropriate standards to choose. Of course, this is the equipment in the selection should be identified when the problem. Clearance detection should also be based on the relevant industry standards for professional testing.