Amazon.com: SKF USA BR4 Roller Bearing (Tapered Set
The modern caged single row cylindrical roller bearing was invented in 1909 by Dr.`Ing. Josef Kirner! a leading engineer at the Norma`Compagnie! Cannstatt! Germany. This company was incorporated into the SKF Group in 1914. Since then! most major technical advancements in cylindrical roller bearings have been developed by SKF.