... continous duty 2:Varied motor combination,mounting position..... (gear box)(reducer)(helical-bevel gear) Model 37 47 57 67 77 87 Structure ... device and composed of Y series motor, helical gear, Gelisen arc cone gear and worm gear. The gears are made of high wear ... the mounting position ,motor combination. 7:with small volume , helical gear achieve the output torque range of 69-18000NM and output ...