Page 783 - Rollingbearings

Bearing data

Bearing data

Dimension Boundary dimensions: ISO 15, except for the width of sealed bearings with a BS2- designation preix
standards

Tolerances Normal
P5 geometrical tolerance on request (designation sufix C08)

Except for:

• Bearings with d ≤ 300 mm:
– width tolerance at least 50% tighter than ISO standard (table 3)
– P5 geometrical tolerance

• Bearings for vibratory applications:
– P5 bore diameter
For additional – P6 outside diameter
information
† page 35 Values: ISO 492, (table 2, page 38, to table 4, page 40)

Internal clearance Normal, C3
Check availability of C2, C4 or C5 clearance classes
Bearings for vibratory applications: C4

Values:
• cylindrical bore (table 4, page 782)
• tapered bore (table 5, page 783)
For additional
information Values are in accordance with ISO 5753-1 (as far as standardized) and are valid for unmounted bearings
† page 182 under zero measuring load

Permissible • Guideline values for light to normal loads (P ≤ 0,1 C) and constant position of misalignment relative to
misalignment the outer ring: table 6
Whether these values can be fully exploited depends on the design of the bearing arrangement, the
bearing abutments in the housing, etc
• When the position of the misalignment is not constant relative to the outer ring, additional sliding may
occur in the bearing, limiting misalignment to a few tenths of a degree Examples are: 9
– vibrating screens with rotating imbalance and therefore rotating delection of the shaft (ig. 14)
– delection-compensating rolls of paper machines where the stationary shaft is not straight
• To avoid detrimental effects on sealing performance, misalignment for sealed bearings should not
exceed 0,5°

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