The limiting speed listed in the product table is a mechanical limit that should not be exceeded unless the bearing design and the application are adapted for higher speeds.
SKF recommends oil lubrication for bearings with a ring centred cage (designation suffix MA or PHAS). When these bearings are grease lubricated, the ndm value is limited to 250 000 mm/min.
|dm||bearing mean diameter [mm]
= 0,5 (d + D)
|n||rotational speed [r/min]|