Overview
The SITO DRIVE HS-25-I reducer is offered in 30, 50, 80, 100, and 120 speed-ratio options for robotic motion systems. At a 2000 rpm input, rated torque ranges from 27 to 67 Nm by ratio, while maximum allowable input speed is 5600 rpm. Select the ratio according to the required torque, backlash, and motion arrangement.
Features
- Five selectable speed ratios: 30, 50, 80, 100, and 120.
- Maximum allowable input speed of 5600 rpm and allowable average speed of 3500 rpm for every listed ratio.
- Backlash of ≤20 arcsec for ratios 30 and 50, and ≤10 arcsec for ratios 80, 100, and 120.
Specifications
| Parameter | HS-25-I, Ratio 30 | HS-25-I, Ratio 50 | HS-25-I, Ratio 80 | HS-25-I, Ratio 100 | HS-25-I, Ratio 120 |
|---|---|---|---|---|---|
| Rated torque at 2000 rpm input | 27 Nm | 39 Nm | 63 Nm | 67 Nm | 67 Nm |
| Peak torque allowed during start/stop | 50 Nm | 98 Nm | 137 Nm | 157 Nm | 167 Nm |
| Maximum allowable average load torque | 38 Nm | 55 Nm | 87 Nm | 108 Nm | 108 Nm |
| Instantaneous maximum torque | 95 Nm | 186 Nm | 255 Nm | 284 Nm | 304 Nm |
| Maximum allowable input speed | 5600 rpm | 5600 rpm | 5600 rpm | 5600 rpm | 5600 rpm |
| Allowable average speed | 3500 rpm | 3500 rpm | 3500 rpm | 3500 rpm | 3500 rpm |
| Moment of inertia | 0.413 × 10⁻⁴ kg·m² | 0.413 × 10⁻⁴ kg·m² | 0.413 × 10⁻⁴ kg·m² | 0.413 × 10⁻⁴ kg·m² | 0.413 × 10⁻⁴ kg·m² |
| Backlash | ≤20 arcsec | ≤20 arcsec | ≤10 arcsec | ≤10 arcsec | ≤10 arcsec |
SITO HS 25 I Reducer — 3D Model (STEP)
SITO HS 25 I Draw instalation drawing — Installation Drawing (PDF)
Applications
The HS-25-I is listed for the following robotic applications, where its selectable speed ratios and listed torque and backlash values support reducer selection for the required motion arrangement.
- Humanoid robots: joint-motion configurations requiring a selected reduction ratio.
- Robotic arms: robotic joint assemblies matched to the specified ratio and torque values.
- Exoskeletons: motion-system layouts requiring a reducer ratio selection.
- Quadruped robots: leg-joint motion arrangements using the listed ratio options.
- AGV vehicles: robotic vehicle motion systems requiring a selected reduction ratio.
- ARU robots: robotic motion arrangements using the listed HS-25-I options.
Visual Details
Product Video
Specifications and Performance

Additional Product Details


Dimensions and Construction

Application Examples
