Bearing data

Dimension
standards
Boundary dimensions: ISO 15:2011
Tolerances
For additional
information
(→ Tolerances)
Normal
P6 running accuracy
Values: ISO 492:2014 (table 1, table 2)
Internal
clearance

For additional
information
(→ Internal clearance)
C3
Check availability of other clearance classes
Values: ISO 5753-1:2009 (table 3)
Values are valid for unmounted bearings under zero measuring load.
Misalignment

Identical to standard bearings
(→ Bearing data)
Axial
displacement

NU design hybrid cylindrical roller bearings can accommodate axial displacement of the shaft relative to the housing within the bearing. Values for the permissible axial displacement s from the normal position of one bearing ring relative to the other are listed in the product table.
Silicon nitride
properties
For bearing grade silicon nitride (Si3N4), refer to Materials for rolling bearings.
Electrical
properties
Hybrid bearings provide protection against AC and DC currents. The impedance for a hybrid bearing is high, even for very high frequencies, providing good protection against high frequency current and voltage peaks. For small hybrid deep groove ball bearings fitted with a contact NBR seal, the voltage level before the first arcing occurs through the seal/bearing contact is > 2,5 kV DC. For additional information, contact the SKF application engineering service.
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