Bearing data

Dimension
standards
Boundary dimensions: ISO 1206:2001 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 and when rollers 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 like H+24+20)
Values: ISO 492:2014 (table 2, table 3, table 4)
Operating clearance

Bearings without an inner ring

Suitable ranges (table 5) if:
  • 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 5753-1:2009 (table 6)
Values are valid for unmounted bearings under zero measuring load.
Misalignment≈ 1 minute of arc

The permissible angular misalignment between the shaft and the housing depends on the size and internal design of the bearing, the radial internal clearance in operation and the forces and moments acting on the bearing. As a result, only an approximate value is listed here. Any misalignment increases bearing noise and reduces bearing service life.
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