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Bearing data

Deep groove ball bearings

Dimension standards

Boundary dimensions: ISO 15

Series 10, 02, 03

Tolerances

For additional information → Tolerances

Normal

Values: ISO 492 (table 1)


Due 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 and ball bearing units
 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)


Due 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.


Due 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.

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.

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.

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