Roll-Forged sheaves are available in sizes up to 78 in diameter. McKissick Roller Bearing Sheaves are designed to operate on shafts carborized to 60 Rockwell C and grind to -.003/-.004 of the indicated shaft size. Some sizes are available with an optional inner race. Check with Crosby Sales for prices and correct shaft size. Application should provide for 1/32 running clearance over the hub width. For sizes not listed, McKissick Finished Bore Sheaves can be equipped with Roller Bearings at an optional charge.