SMKC25UU NB 25mm Slide Bush Bushings Motion Linear Bearing Outer Diameter - 50.292mm With its included inner ring

With its included inner ring (cone)

a bigger number of balls can be set up than in the instance of ball bearings

6219NR width is 32mm

SW10UU Seals on both sides

SMKC25UU NB 25mm Slide Bush Bushings Motion Linear Bearing Outer Diameter - 50.292mm With its included inner ringSMKC25UU NB Center Mount Square Flange Slide Bush Made in Japan: NB Linear Systems Nippon Bearing Linear Systems SMKC25UU NB Center Mount Square Flange Linear Slide Bush, The retainer material is steel, Bearing is seals on both sides, series mainly used in the USA, NB brand (Nippon Bearing Linear Systems), Made in Japan. SMKC25UU NB Bearing Linear Slide Bush Retainer Material: Steel Bearing Inner Diameter: 25mm Quantity: 1 Bearing Dynamic Load Rating