... , big torque and long life helical gear boxes R series helical gear boxes,gear reducer,gear boxSpecificationsLOW NOISE, HIGH PRECISION, BIG TORQUE ... WIDE RANGE. THE COMBINATION OF MACHINES CAN PRODUCE A LARGER TRANSMISSION RATIO AT A LOW OUTPUT ROTATIONAL SPEEDLOW NOISE, ... NOT EXCEED 1800r/m,THE CIRCUMFERENTIAL SPEED OF THE GEAR SHOULD NOT EXCEED 20m/sSUITABLE FOR NORMAL-REVERSE ROTATIONWITHOUT ...