SKF recommends oil lubrication for bearings with a ring centred cage (designation suffix MA or MB). When these bearings are grease lubricated (→ Lubrication) the speed factor is limited to A ≤ 250 000 mm/min.
|A||=||n dm [mm/min]|
|dm||=||bearing mean diameter [mm]
= 0,5 (d + D)
|n||=||rotational speed [r/min]|
For applications exceeding these values, contact the SKF application engineering service.
For matched bearings, the permissible speed calculated for a single bearing should be reduced to approximately 80% of the quoted value.