Overview
SITO DRIVE CS Mini-08-1U-U is a compact harmonic reducer offered with 30, 50, or 100 transmission-ratio options for robotic motion systems and other compact mechanisms. At a 2,000 r/min input, rated torque ranges from 0.9 to 2.4 Nm according to ratio; all listed options have an 8,500 rpm maximum allowable input speed and ≤20 arcsec backlash. Review ratio-specific torque limits and the installation drawing when selecting.
Features
- CS-08-1U-U reducer with selectable 30, 50, or 100 transmission ratios.
- Maximum allowable input speed: 8,500 rpm; allowable average speed: 3,500 rpm.
- Backlash: ≤20 arcsec for each listed ratio.
Specifications
Ratio-specific performance
| Parameter | Ratio 30 | Ratio 50 | Ratio 100 |
|---|---|---|---|
| Model | CS-08-1U-U | CS-08-1U-U | CS-08-1U-U |
| Transmission ratio | 30 | 50 | 100 |
| Rated torque at 2,000 r/min input | 0.9 Nm | 1.8 Nm | 2.4 Nm |
| Peak torque allowed during start/stop | 1.8 Nm | 3.3 Nm | 4.8 Nm |
| Maximum allowable average load torque | 1.4 Nm | 2.3 Nm | 3.3 Nm |
| Instantaneous maximum torque | 3.3 Nm | 6.6 Nm | 9 Nm |
| Maximum allowable input speed | 8,500 rpm | 8,500 rpm | 8,500 rpm |
| Allowable average speed | 3,500 rpm | 3,500 rpm | 3,500 rpm |
| Moment of inertia | 3.2 × 10³ (× 10⁻⁴ kg·m²) | 3.2 × 10³ (× 10⁻⁴ kg·m²) | 3.2 × 10³ (× 10⁻⁴ kg·m²) |
| Backlash | ≤20 arcsec | ≤20 arcsec | ≤20 arcsec |
Installation dimensions and interfaces
| Drawing item | Specified value |
|---|---|
| Displayed size | 30 × 67.5 mm |
| Overall width | 30 mm |
| Overall length | 67.5 mm |
| Diameter limit | ≤50 mm |
| Thickness limit | ≤67.5 mm |
| Weight | ≤0.106 kg |
| Front-face diameter callout | Ø35 |
| Front-face mounting holes | Four M3 threaded holes; depth marking 6 |
| Square dimension | □30 ±0.10 |
| Left shaft callout | 4.50 +0/−0.05 |
| Left shaft diameter | Ø5 +0/−0.02 |
| Drawing callouts | 11; 13; 2.60; Ø16; Ø28; 13.50; 5; Ø25; 2.50 (two locations); 29.50 |
| Output shaft diameter | Ø9 +0/−0.002 |
| Output shaft-end diameter | Ø8 0/−0.05 |
| Output shaft diameter | Ø29 0/−0.02 |
Applications
Suitable for designing compact robotic joints and motion modules where the required reduction ratio, torque limits, input speed, backlash, and drawing-defined mounting geometry can be matched to the application.
Downloads
SITO CS 08 1U U Reducer Mini — 3D Model (STEP)
SITO CS 08 1U U Reducer — 3D Model (STEP)
SITO CS 08 1U Draw Mini instalation drawing — Installation Drawing (PDF)
Visual Details
Product Video
Product Views

Dimensions and Construction


Additional Product Details




