... ,high precision, big torque and long life helical gear boxes R series helical gear boxes,gear reducer,gear boxSpecificationsLOW NOISE, HIGH PRECISION, BIG TORQUE AND ... NOT EXCEED 1800r/m,THE CIRCUMFERENTIAL SPEED OF THE GEAR SHOULD NOT EXCEED 20m/sSUITABLE FOR NORMAL-REVERSE ROTATIONWITHOUT ... TECHNICAL SUPPORTING DEPARTMENT FOR OTHER CIRCUMSTANCES R series helical gear boxes/gear reducer/gear box