R4 Open Bearing 1/4x5/8x0.196 inch MiniatureR4 Open Ball Bearing Ceramic Balls 1 4" x 5 8" x 0. 196" inch R4 Open Ball Bearing with Ceramic Balls, inner diameter is 1 4" inch, outer diameter is 5 8" inch and width is 0. 196" inch. Item: R4 Ball Bearing Type: Deep Groove Ball Bearing Closures: Open Material: Chrome Steel Size: 1 4" x 5 8" x 0. 196" inch Inner Diameter: 1 4" inch Outer Diameter: 5 8" inch Width: 0. 196" inch Quantity: One Bearing Dynamic load rating: 1490 N Static load rating: