Besides the pulleys as per Chinese GB10595 Standard, TY can supply the pulleys fabricated according to the Know-How technologies introduced from German KOCH AG. The dimensions of pulley shell, end disc, hub and shaft are rationally determined with the aid of computer. According to actual load condition, it is light, medium or heavy duty construction of the pulleys. Casting steel end disc, welded structure pulley is available for the heavy torque one. CO2 and submerged arc welding are adopted for the pulleys. Ultrasonic or X-ray nondestructive test is carried out for the weld bead test. Herring bone or diamond pattern groove rubber lagging on pulley surface is available for the drive pulley. Key, shrinkage or shrink disc connection is adopted for the pulley shaft and hub connection according to the application requirement. Static balancing is carried out for each pulley before delivery for ensuring the least rotating resistance.