# Seal and Grease Choices That Extend Mining Rail Bearing Life
Seals are the first line of defense on mine railways where ore dust and splash never stop. A lip that looks intact after one haul can still leak after a few grade changes if the grease is wrong or the housing drains poorly. Grease purge that looks like “normal weep” can empty the raceway over a maintenance cycle.
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Cartridge assemblies reduce field packing errors but still need correct mounting torque and adapter condition. Once slurry enters, steel grade alone will not save the shift. Relubrication intervals should follow contamination exposure, not only calendar weeks.
Browse mining rail bearings and related railway bearings at TFL Bearing. tflbearing.com railway bearings lists duty notes useful for pit fleets; Shandong TFL Bearing Co., Ltd is the manufacturer name on the same page.