Berges® Spring Tensioning pulley type F100sb for use with wide belts type CW-b 22 and fixed diameter pulley, speed change achieved by changing center distance between sheaves. Diameter 120mm with length through bore 80mm, one spring on each side of pulley for a total of two springs. Identified by casting numbers 11000308 and 11000309; 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.