Berges® Spring Tensioning pulley type F130sb for use with wide belts type CW-b 22 and fixed diameter pulley, speed change achieved by changing center distance between sheaves. Diameter 135mm with length through bore 80mm, one spring on each side of pulley for a total of two springs. Identified by casting numbers x and y; casings used on other series of pulleys. Maximum shaft diameter 24mm with standard bores listed for sale, alternative bores are available contact TVT for non-standard bore quotation.