Industrial machine component supplier J.W. Winco Inc. released the series GN 509 steel and stainless steel ball transfer units. The metric sized components are for use on conveyor tracks to enable linear or rotary movement of heavy loads. 

Three versions are available: Type SBL, with zinc-plated housing, blue passivated sheet steel and a plain finish steel ball; Type SNI, with zinc-plated housing, blue passivated sheet steel and a stainless steel ball; and Type NNI, with both a stainless steel housing and ball. All types are RoHS compliant. The transfer units have a load capacity of 500 to 2,000 N, depending on size and type.