R4-2RS Series Single Row Radial Ball Bearings are made of Chrome-Steel, pre-lubricated with grease and has rubber seals on both sides to protect the bearings from dust or any other types of possible contamination. The R Series Radial Ball Bearings have a combination of an inner and outer ring with a cage containing a complement of precision balls.
The R Series Single Row Radial Ball Bearings include in the following: axial fans, clutch, drive axles, idler wheels, motors, roller skates, skateboards, snow mobiles, fishing reel, motors, and many other industrial equipment.
"d" (shaft or inner diameter) = 1/4"
"D" (outer diameter) = 5/8"
"B" (width) = .1960"