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Harmonic Drive (zero backlash)

Harmonic Drive (zero backlash) is a precision strain wave gear used in robotics wherever high positional accuracy, compact construction, and minimal backlash are required. Components of this type are widely used in robot joints, manipulators, robotic arms, axis drives, and positioning systems.

Key characteristics of this component class include very high precision, large gear ratios within compact dimensions, smooth operation, high repeatability, and suitability for applications requiring accurate motion control. In practice, a harmonic drive often appears as part of an integrated actuator or joint module alongside a motor, encoder, and controller.

#Harmonic Drive#Zero Backlash#Strain Wave Gear#Precision Gear#Robot Joint Transmission#Robotics#Actuation#Motion Control#Manipulator#Gear Reduction
Market classIndustrial

Classification

Harmonic Drive · serves as: Torque Transmission, Gear Reduction, Precision Joint Motion. · compatible with: Humanoid, Manipulator, Industrial Robot.

Which group Harmonic Drive (zero backlash) belongs to and how it is built

5items
Actuation
Hardware domain
Industrial
Market class

This subcategory covers components responsible for highly accurate torque transmission and speed reduction in robots, manipulators, and joint modules.

Harmonic Drive is a specialized strain wave gear valued in robotics for its high precision, very low backlash, and large gear reduction ratio in a compact form factor. It is widely used in the joints of industrial and humanoid robots, as well as manipulators with demanding accuracy requirements. Its compact construction enables the design of rigid, precise motion axes.

Strain wave gear design used in precision drive systems for robots and manipulators.

Technical specification

Basic physical properties of Harmonic Drive (zero backlash) — dimensions, weight and materials

4parameters
Dimensions
Wymiary zależne od konkretnej wielkości i serii przekładni.
Materials
Precision steel and alloy components; the exact material stack depends on the manufacturer and series.
Mounting
Mounted as a gear element within a joint module, robot axis, manipulator, or integrated actuator.
Weight
Masa zależna od rozmiaru, przełożenia i wykonania.
Updated: 23 March 2026