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
| Parameter | 50 ratio | 80 ratio | 100 ratio | 120 ratio |
|---|---|---|---|---|
| Model | HS-32-III | HS-32-III | HS-32-III | HS-32-III |
| Transmission ratio | 50 | 80 | 100 | 120 |
| Rated torque at 2000 r/min input | 76 Nm | 118 Nm | 137 Nm | 137 Nm |
| Peak torque allowed during start/stop | 216 Nm | 304 Nm | 333 Nm | 353 Nm |
| Maximum allowable average load torque | 108 Nm | 167 Nm | 216 Nm | 216 Nm |
| Instantaneous maximum torque | 382 Nm | 568 Nm | 647 Nm | 686 Nm |
| Maximum allowable input speed | 4800 rpm | 4800 rpm | 4800 rpm | 4800 rpm |
| Allowable average speed | 3500 rpm | 3500 rpm | 3500 rpm | 3500 rpm |
| Moment of inertia | 1.69 (×10⁻⁴ kg·m²) | 1.69 (×10⁻⁴ kg·m²) | 1.69 (×10⁻⁴ kg·m²) | 1.69 (×10⁻⁴ kg·m²) |
| Backlash | ≤20 arcsec | ≤20 arcsec | ≤10 arcsec | ≤10 arcsec |
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
Specifications and Performance
Additional Product Details
Dimensions and Construction
Application Examples