The safety factor of its main-bearing parts can catch 3. All superior the design requirement of APl Spec 8C standard, the capacity of overload during drilling operation is very strong. 
No Geardrive structure, direct drive the main shaft drilling by motor,can supply the higher operation torque, low noise, no gear trouble, energy consumption loss reduce in the pass and maintainconvenience. 
Motor adopt permanent magnet synchronous torque servo motor, the effective power of the motor catch more than 90%, transmission efficiency increase of about 10% compared to traditional motor. 
Top drive system is consistent with the overall structure of center of gravity, so that top drive and slide without friction that due to laterality, increase the life of pulley. 
Structure simply, Weight reducing, make sure the effective lifting hoisting of travelling system, reducing wear and damage of steel cables, bearings and so on.