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    25 mm Strain Wave Harmonic Drive Gearbox, Ratio 30~50

    25mm harmonic drive gearbox for sale online. Cheap harmonic gearing has 30 and 50 gear ratios for selection. High precision and torque strain wave gear is the best solution for industrial robots, CNC equipment, medical instruments, military industry and other fields.
    SKU: ATO-HD-25
    30-day Returns
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    Delivery date: 6-12 days

    Get a 25mm harmonic drive at low price. It is available with gear ratios of 30 and 50. Harmonic gearing provides high transmission accuracy and supports a single-stage high reduction ratio with low inertia. Cost-effective strain wave gear 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-03
    • Diameter: 25 mm
    • Thickness: 7.3 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, other gear ratios please contact us.


    Gear ratio 30 50
    Rated torque when input 2000r/min (N.m) 0.08 0.13
    Allowable peak torque at start and stop (N.m) 0.15 0.24
    Maximum allowable average load torque (N.m) 0.12 0.16
    Momentary allowable maximum torque (N.m) 0.25 0.6
    Allowable maximum input speed (r/min) 10000
    Allowable average input speed (r/min) 6500
    Moment of inertia (1/4GD) (kgcm2) 7.0x10-4
    Arc seconds ≤20
    Design life (hour) 10000

    25mm strain wave harmonic drive gearbox dimensions (unit: mm)

    25mm harmonic drive dimensions

    Strain wave harmonic drive gearbox applications

    Harmonic drive applications

    Tips:  Strain wave harmonic drive gearbox working principle

    Harmonic gear transmission was invented by the American inventor CWMusser in 1955. The harmonic drive is a new type of transmission method that uses the elastic deformation of flexible working members to move or transmit power. It breaks through the use of rigid components in mechanical transmission. The mechanism mode uses a flexible component to achieve mechanical transmission, thereby obtaining a series of special functions that are difficult to achieve by other transmissions. Because the deformation process of the intermediate flexible component is basically a symmetrical harmonic, it is named. Except that the former Soviet Union called this kind of transmission flexible wheel transmission, the United States, Britain, Germany, Japan and other countries all called it "harmonic transmission".

    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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