SITO DRIVE HS-32-III Harmonic Reducer, 50120:1 Ratios for Robotics

Overview

The SITO DRIVE HS-32-III harmonic reducer is offered in 50, 80, 100, and 120 transmission ratios for robotics applications including robotic arms, humanoid robots, exoskeletons, quadruped robots, AGV vehicles, and ARU robots. At a 2000 r/min input speed, rated torque varies by ratio from 76 to 137 Nm; backlash is 20 or 10 arcsec, depending on the selected ratio.

Features

• High-toughness flexspline: Electroslag remelting, multi-stage forging, and repeated spin forming improve material purity and ductility, supporting fatigue resistance and helping reduce structural damage under overload.
• Advanced ADI material: Fine-structured austempered ductile iron (ADI) provides self-lubricating properties, low temperature rise, vibration damping, reduced noise, and long service life across a broad operating temperature range.
• Precision heat treatment: An optimized heat-treatment process balances hardness and toughness while controlling residual stress to improve fatigue performance.
• Optimized flexspline tooth finishing: Tooth finishing after deformation improves meshing contact and load distribution, reducing friction and enhancing durability.
• S-shaped tooth profile: Developed using kinematic, friction, and lubrication analysis, the S-shaped tooth geometry promotes smooth torque transmission and reduces friction during gear engagement.
• Specialized precision tooling: Custom-developed machining tools support production of miniature harmonic reducers and precise gear components.
• Performance testing: Testing covers service life, accuracy, starting torque, torsional stiffness, and load capacity to support product development and quality control.

Applications

• Humanoid robots
• Robotic arms
• Exoskeletons
• Quadruped robots
• AGV vehicles
• ARU robots

Specifications

Downloads

• SITO HS 32 II Reducer 3D Model (STEP)
• SITO HS 32 III Reducer 3D Model (STEP)
• SITO HS 32 III Draw instalation drawing Installation Drawing (PDF)

Visual Details

Product Video

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Specifications and Performance

Strain wave reducer family lineup with diameter, ratio, and torque range text

Additional Product Details

Robotic hand graphic labeled CSMini-2.5 ultra-micro strain wave drive reducerManufacturing and inspection imagery for precision reducer components

Dimensions and Construction

Small strain wave reducer comparison with 11 mm diameter label and coin

Application Examples

Industrial robotic arm illustration describing harmonic reducers as robot core components