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    90 mm Strain Wave Harmonic Drive Gearbox, Ratio 50~100

    Get the best 90mm strain wave gear from a reliable harmonic drive company. It is a high torque harmonic gearing with a 50 or 100 gear ratio. The harmonic drive gearbox provides high transmission accuracy and supports a single-stage high reduction ratio with low inertia, used for industrial robots, CNC equipment, medical instruments, and the military industry.
    SKU: ATO-HD-90
    30-day Returns
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    Delivery date: 6-12 days

    Low price 90mm harmonic drive is the simplest solution for your high-precision motion control applications. It is a strain wave gear that provides harmonic gear reduction and increases rotation speed. Buy a harmonic gearing with a 50 or 100 gear ratio for robotics and aerospace.


    • 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.


    • Model: ATO-SHD-20
    • Diameter: 90 mm
    • Thickness: 19 mm
    • Gear type: Cylindrical gear reducer
    • Installation form: Horizontal
    • Input speed: 3500 rpm
    • Rated power: 0.1 kW
    • Output speed: 0~500 rpm
    • Available torque: 1~100 N.m
    • Number of stages: Single-stage
    • Gear ratio: 50, 100, other gear ratios please contact us.


    Gear ratio 50 100
    Rated torque when input 2000r/min (N.m) 17.00 28.00
    Allowable peak torque at start and stop (N.m) 39.00 57.00
    Maximum allowable average load torque (N.m) 24.00 34.00
    Momentary allowable maximum torque (N.m) 69.00 95.00
    Allowable maximum input speed (r/min) 6000
    Allowable average input speed (r/min) 3500
    Arc seconds ≤20 ≤10
    Design life (hour) 10000

    90mm strain wave harmonic drive gearbox dimensions (unit: mm)

    90 mm strain wave harmonic drive gearbox dimensions

     Strain wave harmonic drive gearbox applications

    Harmonic drive applications

    Tips: What is a strain wave harmonic drive gearbox?

    ATO strain wave harmonic drive gearbox is a kind of speed reduction device, which is composed of three basic components: fixed internal gears, flexible wheels and wave generators that cause radial deformation of the flexible wheels. Harmonic gearing is a new type of transmission structure. The harmonic drive uses the flexible gear to generate a controlled elastic deformation wave, causing the relative misalignment between the teeth of the rigid wheel and the flexible wheel to transmit power and motion. The harmonic drive has the advantages of high precision and high load capacity, and its volume and weight are reduced by at least 1/3 compared with an ordinary gear reducer because the material used is 50% less.

    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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    SKU: ATO-HD-55
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