Overview
The SITO DRIVE CS Mini-05-1U-U micro harmonic reducer is offered with 30, 50, or 80 speed-ratio options for compact robotic and motion-transmission assemblies. At a 2,000 r/min input speed, rated torque ranges from 0.25 to 0.52 Nm by ratio. The reducer has a stated maximum allowable input speed of 10,000 rpm, backlash of ≤20 arcsec, and a compact installation drawing with mounting and shaft dimensions.
Features
- CS Mini-05-1U-U micro harmonic reducer.
- Selectable transmission ratios: 30, 50, or 80.
- Maximum allowable input speed: 10,000 rpm.
- Allowable average speed: 6,500 rpm.
- Backlash: ≤20 arcsec.
Specifications
Performance by Transmission Ratio
| Parameter | Ratio 30 | Ratio 50 | Ratio 80 |
|---|---|---|---|
| Model | CS-05-1U-U | CS-05-1U-U | CS-05-1U-U |
| Transmission ratio | 30 | 50 | 80 |
| Rated torque at 2,000 r/min input | 0.25 Nm | 0.4 Nm | 0.52 Nm |
| Peak torque allowed during start/stop | 0.5 Nm | 0.9 Nm | 1.35 Nm |
| Maximum allowable average load torque | 0.38 Nm | 0.53 Nm | 0.84 Nm |
| Instantaneous maximum torque | 0.9 Nm | 1.8 Nm | 2.5 Nm |
| Maximum allowable input speed | 10,000 rpm | 10,000 rpm | 10,000 rpm |
| Allowable average speed | 6,500 rpm | 6,500 rpm | 6,500 rpm |
| Moment of inertia | 2.5 × 10⁻⁴ kg·m² | 2.5 × 10⁻⁴ kg·m² | 2.5 × 10⁻⁴ kg·m² |
| Backlash | ≤20 arcsec | ≤20 arcsec | ≤20 arcsec |
Installation Drawing Dimensions
| Item | Specified value |
|---|---|
| Diameter | ≤22 mm |
| Thickness | ≤38 mm |
| Weight | ≤0.042 kg |
| Front mounting face | Square, 20 mm ±0.1 mm |
| Axial dimension | 8.50 mm |
| Left-side flange axial dimension | 2 mm |
| Body length | 18 mm |
| Right-side flange axial dimension | 2 mm |
| Right-side shaft projection | 7.50 mm |
| Axial step dimension | 1.50 mm |
| Right-side shaft-section axial dimension | 6.50 mm |
| Left-side shaft projection | 7.50 mm |
| Left-side shaft vertical dimension | 3.50 mm |
| Stepped cylindrical section | Ø19.50 mm, tolerance −0.02 / −0.04 |
| Stepped cylindrical section | Ø15 mm, tolerance −0.02 / −0.04 |
| Left-side shaft | Ø4 mm |
| Right-side shaft | Ø3 mm, tolerance −0.05 |
| Right-side shaft | Ø9 mm, tolerance −0.02 |
| Right-side shaft-section vertical dimension | 2.6 mm |
| Output-side circular feature | Ø23 mm |
| Mounting interface | Four M2-6H threaded holes; depth 4 |
Applications
Use this micro harmonic reducer in compact robotic and motion-transmission assemblies where the selected 30, 50, or 80 ratio, torque limits, speed limits, backlash, and installation geometry can be matched to the mechanism. The documented mounting face, threaded-hole pattern, and shaft dimensions support mechanical layout and installation planning.
Documents
- SITO CS 05 1U U Reducer — 3D Model (STEP)
- SITO CS 05 1U U Reducer Mini — 3D Model (STEP)
- SITO CS 05 1U U Reducer — 3D Model (STEP)
- SITO CS 05 1U U Reducer — 3D Model (STEP)
- SITO CS 05 1U U Reducer Mini — 3D Model (STEP)
- SITO CS 05 1U U Draw instalation drawing — Installation Drawing (PDF)
Visual Details
Product Video
Specifications and Performance

Application Examples


Dimensions and Construction



Additional Product Details
