Temperature Adjustment for Basic Load Rating
If rolling bearings are used at high temperatures, the hardness of the bearing steel decreases. Consequently, the basic load rating, which depends on the physical properties of the material, also decreases. Therefore, the basic load rating should be adjusted for the higher temperatures using the following equation:
where
| C t : |
Basic load rating after temperature correction (N) |
| f t : |
Temperature factor (See table below) |
| C : |
Basic load rating before temperature adjustment (N) |
If large bearings are used at higher than 120°, they must be given special dimensional stability heat treatment to prevent excessive dimensional changes. The basic load rating of bearings given such special dimensional stability heat treatment may become lower than the basic load rating listed in the bearing tables.
Temperature Factor ft
| Bearing Temperature( ℃) |
125 |
150 |
175 |
200 |
250 |
| Temperature Factor ft |
1.00 |
1.00 |
0.95 |
0.90 |
0.75 |
|
