Bearing data
Dimension standards |
Boundary dimensions: ISO 15 Series 10, 02, 03 |
Tolerances For additional information → Tolerances |
Normal Values: ISO 492 (table 1) Owing to the special surface treatment of the bearings, there may be slight deviations from the standard tolerances. These deviations do not affect mounting or bearing operation. |
Radial internal clearance |
Multiples of C5 Values (table 2) are valid for unmounted bearings under zero measuring load. |
Permissible misalignment |
≈ 20 to 30 minutes of arc Accommodate misalignment only when the bearings rotate slowly. Misalignment increases bearing noise and reduces bearing service life, and when it exceeds the guideline values, these effects become particularly noticeable. |
Stabilization |
120 °C (250 °F) The rings, rolling elements and cages of SKF high temperature bearings undergo the same heat stabilization process as the relevant standard bearing. As a result, for higher operating temperatures, a certain amount of dimensional change is to be expected. Greater clearances accommodate temperature differentials and material structural changes. |
Insert bearings (Y-bearings) | Ball bearing units | |
Dimension standards |
Boundary dimensions: ISO 9628 |
Boundary dimensions: ISO 3328 |
Tolerances For additional information → Tolerances |
Normal, except the bore and outside diameter (table 3) Values: ISO 492 (table 1) Owing to the special surface treatment of the bearings, there may be slight deviations from the standard tolerances. These deviations do not affect mounting or bearing operation. |
Housing bore has an increased sphere diameter appropriate for high temperature applications. Owing to the special surface treatment of the bearings and ball bearing unit housings, there may be slight deviations from the standard tolerances. These deviations do not affect mounting or bearing operation. |
Internal clearance |
Multiples of C5 Values (table 2) are valid for unmounted bearings under zero measuring load. |
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Permissible misalignment |
≈ 20 to 30 minutes of arc |
≈ 20 to 30 minutes of arc Initial static misalignment ≤ 5° |
Accommodate misalignment only when the bearings rotate slowly. Misalignment increases bearing noise and reduces bearing service life, and when it exceeds the guideline values, these effects become particularly noticeable. |
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Stabilization |
150 °C (300 °F) The rings, rolling elements and cages of SKF high temperature insert bearings and ball bearing units undergo the same heat stabilization process as the relevant standard insert bearing and ball bearing unit. As a result, for higher operating temperatures, a certain amount of dimensional change is to be expected. Greater clearances accommodate temperature differentials and material structural changes. |