SWK8 1/2" Bore linear motion ball bushings/bearings, the inner diameter(bore) is 1/2" 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.

• Item: SWK8 Bearing
• Type: NB Linear Systems ball bushing
• Shaft Diameter: 1/2" Inch
• Dynamic load rating Cr: 510 N
• Static load rating Cor: 784 N
• Number of Ball Circuits: 5
• Quantity: One Bearing