Major Brand NX12Z Needle Roller / Full Complement Thrust Ball Bearing 12x21x18mm

NX..Z Series Needle Roller / Ball Thrust Combination: Of a non separable design has a closed cover attached to the housing washer which extends over the needle roller bearing outer ring, these are particularly suited to grease lubrication and the cover serves to retain the grease. They are able to support heavy single direction thrust loads in addition to radial loads, they also permit relatively high speed operation.
Benefits: High speed / thrust loading, grease lubrication, non separable - easily mounted