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    43x43 mm Strain Wave Harmonic Drive Gearbox, Ratio 30

    43x43 mm strain wave harmonic drive gearbox with a high torque capacity and rigidity is available. Small harmonic reducer with 30 gear ratios provides harmonic gear reduction and increases rotation speed. Strain wave gearbox is the simplest solution for your high-precision motion control applications.
    SKU: ATO-HD-43
    30-day Returns
    Free Shipping
    Delivery date: 6-12 days

    Get a high torque 43x43 mm harmonic drive gearbox at low cost. A harmonic reducer provides high transmission accuracy and supports a high reduction ratio with low inertia. Strain wave gearbox with 30 reduction ratio, commonly used for industrial robots, CNC equipment, medical instruments, and military industry.


    • It is a strain wave harmonic drive gearbox with high rigidity, no gear backlash and coaxial input and output.
    • The gearbox features excellent positioning accuracy and rotation accuracy.
    • Harmonic reducer with a high torque capacity and a high gear ratio is available.
    • 43x43 mm strain wave gearbox is designed for robots.


    • Model: ATO-CSF-11-XX-2XH-A
    • Output/Input: Motor direct connection input, Flange output
    • Diameter: 43x43 mm
    • Thickness: 32 mm
    • Gear type: Cylindrical gear reducer
    • Installation form: Horizontal
    • Tooth Surface Hardness: Hard Tooth Surface
    • Layout Form: Coaxial
    • Gear ratio: 30, other gear ratios please contact us.


    Gear ratio 30 50 80 100
    Rated torque when input 2000r/min (N.m) 2.1


    4.5 5
    Allowable peak torque at start and stop (N.m) 4.1 8.3 10.2 11
    Maximum allowable average load torque (N.m) 3.1 5.5 8.5 8.9
    Momentary allowable maximum torque (N.m) 8.2 17 22 25
    Allowable maximum input speed (r/min) 8500
    Allowable average input speed (r/min) 3500
    Moment of inertia (1/4GD) (kgcm2) 1.4x10-2
    Arc seconds ≤20 ≤10

    Dimensions (unit: mm)

    43x43mm harmonic drive dimensions

    Harmonic Drive Gearbox Applications

    ATO harmonic drive gearboxes can be used to optimize the shape of robots, increase precision, increase strength, improve flexibility, etc., and are widely used in industrial robots, numerical control equipment, medical instruments, military and other fields.

    Harmonic drive applications

    Tips: 4 Factors Affecting Transmission Efficiency of Harmonic Drive Gearbox

    • Ambient temperature: Under the same conditions, the higher the ambient temperature, the higher the transmission efficiency of the harmonic drive gearbox (the higher the temperature, the better the lubrication effect).
    • Speed: Under the same conditions, the higher the speed, the lower the efficiency of the harmonic drive gearbox.
    • Speed ratio: Under the same conditions, the greater the speed ratio of the harmonic drive gearbox, the lower the efficiency.
    • Load: Under the same conditions, the greater the load, the higher the efficiency of the harmonic drive gearbox.

    Installation Manual

    PDFATO Harmonic Drive Gearbox Installation Manual

    Precautions for installation

    1. When the harmonic drive gearbox is in use, if the output end is horizontally downward, the lubricating grease injected into the inner wall space of the flexspline must exceed the meshing tooth surface.
    2. The installation plane of the rigid wheel and the rigid wheel connection and the installation plane of the flexible wheel and the flexible wheel need to be statically sealed to ensure that the grease will not leak during the use of the harmonic drive gearbox and avoid the reducer from working with little or no oil Time damage.
    3. During the installation process, please do not knock the parts of the harmonic drive gearbox with hard objects, or apply strong pressure to avoid damage to the parts.
    4. If you have any questions during the inspection, please contact ATO.

    Tips for using a harmonic drive gearbox

    • Please use it in the specified environment.
      Observe the following conditions when using a harmonic drive gearbox:
      Ambient temperature: 0-40 degrees Celsius, no splashes of water, oil, etc.; no corrosive, explosive gas; no dust such as metal powder,
    • Please use the prescribed method for installation.
      Please implement the installation method correctly according to the harmonic drive gearbox manual. If it is not installed correctly, it may cause vibration, loss of accuracy, shortened service life, damage and other failures.
    • Please use the specified lubricant.
      Failure to use the specified lubricant may result in reduced harmonic drive gearbox life.
      Please do not disassemble or reassemble the product, otherwise, it will not be able to restore its original performance.
      Do not exceed the allowable torque during use, otherwise, it may cause harmonic drive gearbox failure.
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