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Bearing data

Dimension
standards
Boundary dimensions: ISO 1206 for bearings in the (R)NA 48, (R)NA 49 and (R)NA 69 series
Tolerances

For additional
information
Tolerances
Normal
P6 or P5 on request
  • Fw: F6 (table 1)
    Values are valid for unmounted bearings when rollers are in contact with the outer ring raceway.

Tighter tolerance for inside diameter under the rollers on request (designation suffix H followed by two numbers that identify the tolerance limit, e.g. H+24+20).


Values: ISO 492 (table 2, table 3, table 4)
Operating clearanceBearings without an inner ring
Suitable ranges (table 5) where:
  • recommended shaft tolerance classes applied
  • housing bore tolerance not tighter than K7Ⓔ
Internal clearanceNormal (bearings with an inner ring)
Check availability of C2, C3 or C4 clearance classes

Values: ISO 5753-1 (table 6)
Values are valid for unmounted bearings under zero measuring load.

Permissible misalignment

≈ 1 minute of arc


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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