The PB series provides the advantages of ball bearings at an economical price
They are used for light-duty applications
The PB series consists of a two-piece separable zinc plated steel housing with a spherical bearing seat this allows the spherically ground bearing to have initial self-alignment in all directions
The ball bearing is an RA-RRB extended inner-ring-type with positive-contact, land-riding seals and a self locking collar
The series incorporates an improved shroud-cap design and comes permanently prelubricated
RPB has the same construction as the PB-type, but with a thick, electrically conductive rubber inner liner
The bearings in the RPB unit are designated as RA-RRB FS450 and have a special ball and race finish for quiet operation
The RABR unit consists of the bearing with the rubber interliner