Creep

The inner diameter surface or outer diameter surface slips, causing the mirror surface or discoloration, and sometimes gets stuck.

Reasons: Insufficient interference at the fitting point, insufficient tightening of the sleeve, abnormal temperature rise, excessive load on the host, etc.

Solution: Re-study whether the interference amount is appropriate, check the usage conditions, and check the accuracy of the shaft and bearing box.

rust corrosion

The surface is partially or completely rusty, and the rolling elements become linearly rusty.

Reasons: poor storage condition, improper packaging, insufficient anti-rust agent, intrusion of moisture, acidic solvents, etc., so handle the bearing directly with your hands. Intrusion of water, corrosive substances (paint, gas, etc.). Unsuitable lubricant. Water droplets are attached due to the condensation of water vapor. Stops when the temperature is high and humid. Poor rust protection during transportation.

Solution: To prevent rust during storage, re-oil the packaging regularly and irregularly, strengthen the sealing performance, check the lubricating oil regularly, replace the oil in a timely manner if the oil quality is unqualified or deteriorated, and use the bearings correctly.

Bearing indentation

Damage condition: dents formed on the raceway surface or rotating surface when small metal powder, foreign matter, etc. are bitten into the machine. Due to the impact during installation, concave surfaces (Brinnell hardness indentations) are formed at the spacing intervals of the rolling elements.

Cause: Foreign matter such as metal powder bites in. The impact load received during assembly or transportation is too large.

Solution: Impact bushing. Improve sealing device. Filter the lubricating oil. Improve assembly and usage methods.