Another part of the block mounted bearing configuration includes labyrinth or triple ring bearing rings. Also called by their nomenclature LER rings or LOR rings each bearing assembly in a mounting block requires 2 rings per assembly. Typically these components come with the initial housing block but when they need to be replaced you can rely on Mechanidrive to carry ample inventory of these seal rings. The seal rings have 2-3 external diameter precision machined equidistant grooves that fit onto the shaft between the bearing adapter sleeve and the outer face of the bearing. It has a perfect slip fit into the grooves machined on each side of the housings bore diameter. Triple rings protect the bearing rollers from contaminates and debris during rotation in the housing. Mechandrive sells low cost replacement triple seals for all your housing mounted bearing applications.