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    40 mm Strain Wave Harmonic Drive Gearbox, Ratio 30~100

    Low price 40mm harmonic drive gearbox is the simplest solution for your high-precision motion control applications. It is a strain wave gear that offers harmonic gear reduction and increases rotation speed. Buy a harmonic gearing with a 30~80 gear ratio for robotics and aerospace.
    SKU: ATO-HD-40
    Free Shipping Worldwide
    Delivery date: 6-12 days

    Affordable 40mm strain wave gear can provide harmonic gear reduction, but can also be used to increase rotation speed. Harmonic gearing with a high torque capacity and rigidity is available. The strain wave harmonic drive gearbox is the best solution for industrial robots.


    • The lightweight strain wave harmonic drive gearbox has an ultra-thin hollow, compact and simple structure.
    • Excellent positioning accuracy and rotation accuracy.
    • Harmonic gearing with a high torque capacity and a high gear ratio is available.
    • Special for wrist joint robot.


    Model: ATO-SHD-08
    Diameter: 40 mm
    Thickness: 11.5 mm
    Gear type: Cylindrical gear reducer
    Installation form: Horizontal
    Input speed: 4000 rpm
    Rated power: 0.1 kW
    Output speed: 0~500 rpm
    Available torque: 1~100 N.m
    Number of stages: Single-stage
    Gear ratio: 30, 50, 80, 100, other gear ratios please contact us.


    Gear ratio 30 50 80 100
    Rated torque when input 2000r/min (N.m) 1 1.95 2.5 2.85
    Allowable peak torque at start and stop (N.m) 2.1 3.95 4.8 5.5
    Maximum allowable average load torque (N.m) 1.65 2.75 3.5 3.95
    Momentary allowable maximum torque (N.m) 3.95 7.95 9 10.8
    Allowable maximum input speed (r/min) 8500
    Allowable average input speed (r/min) 3500
    Moment of inertia (1/4GD2) (kgcm2) 3.5x10-4
    Arc seconds ≤20 ≤10
    Design life (hour) 10000

    40mm strain wave harmonic drive gearbox dimensions (unit: mm)

    40mm harmonic drive dimensions

     Strain wave harmonic drive gearbox applications

    Harmonic drive applications

    Tips: Harmonic gear transmission deceleration principle

    The principle of harmonic gearing is to use the relative movement of the flexible wheel, rigid wheel and wave generator, and the controllable elastic deformation of the main flexible wheel to realize movement and power transmission. The elliptical cam in the wave generator rotates in the flexspline to deform the flexspline. When the flexspline and rigid gear teeth at both ends of the long shaft of the elliptical cam of the wave generator come into engagement, both ends of the short shaft The teeth of the flexspline are separated from the teeth of the steel wheel. For the teeth between the long shaft and the short shaft of the wave generator, the different sections along the two circumferences of the flexible wheel and the rigid wheel are in a semi-engaged state that gradually enters the mesh, which is called meshing, and is in a state of gradually exiting the meshing half mesh. Called out. When the wave generator rotates continuously, the flexspline is continuously deformed, SO that the teeth of the two wheels continuously change their original working state in the four movements of meshing, meshing, meshing and disengaging, resulting in a staggered tooth movement, which realizes the initiative. The motion transfer from the wave generator to the flexspline.

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