SWK64 NB Systems 4" inch Ball Bushings Square Flange Linear Motion
SWK64 NB:Made in Japan:NB Linear Systems
Square Flange Type
Nippon Bearing Linear Systems
SWK64 NB 4" Bore linear motion ball bushings/bearings, the inner diameter(bore) is 4" inch dimensions with steel retainer, bearing is a high accuracy grade linear bushings, series mainly used in the USA, NB brand (Nippon Bearing Linear Systems), made in Japan.