When installing the self-aligning roller bearing, at what temperature will it be damaged due to overheating?
Release time:
2025-06-18
When installing the self-aligning roller bearing, at what temperature will it be damaged due to overheating?
Generally speaking, when installing self-aligning roller bearings with heating, if the temperature exceeds 120℃, it may cause damage to the bearings. The specific reasons are as follows:
- **Tempered phenomenon**: When the temperature exceeds 120℃, the bearing material may undergo tempering, resulting in a decrease in the hardness and accuracy of the rings, affecting the wear resistance and dimensional stability of the bearings, and shortening their service life.
- **Change in metallographic structure**: High temperatures can cause the residual austenite in the bearing steel to transform into martensite, leading to an increase in the circumferential length of the outer ring and causing vibration. At the same time, it may cause the decomposition of the martensite structure, generating tempered sorbite or troostite, reducing the material's toughness and increasing its brittleness, which can easily lead to roller fragmentation or ring cracking during operation.
- **Destruction of grease performance**: If the bearings are pre-filled with grease, excessively high temperatures can cause the grease to carbonize and dry out, losing its lubricating effect. After installation and operation, the friction coefficient will increase sharply, causing the bearings to overheat and fail.
However, due to differences in materials, manufacturing processes, and other aspects, the tolerance for high temperatures of self-aligning roller bearings produced by different manufacturers may vary. For instance, some self-aligning roller bearings made of special high-temperature steel can withstand higher temperatures for a short period without damage, but long-term exposure to high temperatures will still have an adverse effect on their performance.
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