This assembly incorporates a custom designed ABEC-1 Precision Bearing pressed into our traditional "FR" Series style housing with a 16 teeth / inch knurl to assist in the assembly of the roller.
Bearing Construction: 
 Custom ABEC-1 Precision Bearing construction: AISI52100 Steel ~ Nitrile Seals ~ Nylon Ball retainer
 Outer Cup Construction: Zinc plated Steel                                                                                           
Using standard dimensions as our Semi-Precision "FR" series bearings results in minimal / no modification in current roller assembly processes for OEM's.
Same Tooling; Same Process; Superior Product!