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!