Berges® Spring tension Pulley type F600b for use with wide belts type CW-b 83 and adjusting pulley R600b. Diameter of 506mm with length through bore 360mm, die cast aluminum sheave faces with steel slide hub. Identified by casting numbers x and x, one spring; castings used on other series of pulleys.. Maximum shaft diameter 90mm with standard bores listed for sale, alternative bores are available contact TVT for non-standard bore quotation.