Lubrication

SKF ConCentra roller bearing units are intended for grease lubrication.

Initial grease fill

SKF ConCentra roller bearing units in the general, high-speed and extreme environment variants are filled with a mineral oil based lithium grease. The initial grease fill at the factory fills the bearing completely, and 30 to 50% of the free space in the housing.
Relubrication-free bearing units are filled with a semi-synthetic oil based lithium grease. The initial grease fill at the factory fills the bearing completely, and 60 to 80% of the free space in the housing.
The technical specifications of both greases are provided in table 1.
For general, high-speed and extreme variants, the grease provides reliable performance when operating between 35 and 110 °C. During start-up, temperatures down to –20 °C are permissible. For short periods, temperatures above 110 °C can be tolerated.
For the relubrication-free variant, the grease provides reliable performance when operating between 35 and 130 °C. During start-up, temperatures down to –30 °C are permissible. For short periods, temperatures above 130 °C can be tolerated.
For additional information about permissible temperatures of rolling bearing greases, refer to Temperature range – the SKF traffic light concept.
SKF logo