LME203245UUAJ Bearing 20mm Ball Bushing Linear Motion Bearing Inner Diameter - 380mm SR168ZZC4 Dimensions : 1/4" x

SR168ZZC4 Dimensions : 1/4" x 3/8" x 1/8"

6221 open Ball Bearing

outer diameter is 52mm and width is 7mm

they block out dust and run cool at high RPMs

LME203245UUAJ Bearing 20mm Ball Bushing Linear Motion Bearing Inner Diameter - 380mm SR168ZZC4 Dimensions : 1/4" xLME203245UUAJNB Clearance Adjustable Type: Slide Unit Made in Japan: NB Linear Systems LME203245UUAJNB Clearance Adjustable Type Bearing, measures an inner diameter of 20mm, bearing is seals on both sides, Series mainly used in the USA, NB brand (Nippon Bearing Linear Systems), made in Japan. LME203245UUAJNB Bearing Linear Ball Bushing Shaft Diameter: 20mm Number Of Ball Circuits: 5 Quantity: 1 Bearing Dynamic load rating Cr: 862 N Static load rating