... )(helical gearbox) Generallntroduction of HK series:(gear reducer)(gear box)(helical gearbox) The HK series gear units, are novel transmission ... device and composed of Y series motor, helical gear,Gelisen arc gear and worm gear. ... device, strong adaptability. 6:The HK Series can match with general Y series motor, Y2 series motor, overload motor, Brake motor, frequency ...