Roll-Forged Sheaves are available in many configurations in order to meet various oilfield applications. â?¢ Roll-Forgedâ?¢ sheaves are available in sizes up to 78â?? in diameter. â?¢ Applications should provide for tightening separator plates against bearing cones to adjust and insure proper function of bearing. â?¢ Each sheave in the table below has a machined bore sized to accept the respective bearing number shown. â?¢ The sheaves are provided from the factory plain bore (the bearings are not included). How to contact us?