The Optibelt KS V-grooved pulley for taper bushings profile SPZ 10 TB SPZ 63/300ZA and is balanced in one plane. Balancing is carried out minus the key on a smooth mandrel. Machines where the rotors are balanced with an adjusting spring inserted in the shaft end must be ordered as “Balanced with finished bore without key on a smooth mandrel without inserted spring".
Datum diameter is 63 mm Number of grooves are 3 Cast iron pulley
