The FSS series harmonic drive unit is a high-precision gear reduction solution consisting of three core components: the cup-type flexspline, circular spline, and wave generator. Its compact and lightweight structure makes it ideal for applications where space and weight constraints are critical, such as robot joints, precision automation, medical devices, and aerospace systems.
FSS
FSS Harmonic Drive Unit
Key advantages of the FSS unit include:
Compact and lightweight design – The integrated structure achieves minimal size and weight, making it perfect for restricted installation spaces.
High transmission accuracy with low backlash – Harmonic drive technology ensures superior positioning accuracy and repeatability, enabling precise motion control.
High rigidity and load capacity – Each model is equipped with crossed roller bearings, capable of withstanding radial, axial, and moment loads simultaneously, while reducing the need for additional bearing systems.
Easy installation and integration – The unit type design simplifies assembly and ensures stable performance, minimizing errors caused by misalignment.
| Model | Reduction ratio | Rated torque at 2000r/min input | Permissible peak torque at start and stop | Permissible maximum value for average load torque | Permissible maximum momentary torque | Permissible maximum input rotational speed | Permissible average input rotational speed | Backlash | Weight | Design life | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Grease | Grease | |||||||||||||
| Nm | kgfm | Nm | kgfm | Nm | kgfm | Nm | kgfm | r/min | r/min | Arc Sec | kg | Hour | ||
| 5 | 50 | 0.4 | 0.04 | 0.9 | 0.09 | 0.53 | 0.05 | 1.8 | 0.18 | 10000 | 6500 | ≤60 | 0.025 | 10000 |
| 100 | 0.6 | 0.06 | 1.4 | 0.14 | 0.94 | 0.1 | 2.7 | 0.28 | 10000 | |||||
| 8 | 50 | 1.8 | 0.18 | 3.3 | 0.34 | 2.3 | 0.23 | 6.6 | 0.67 | 8500 | 3500 | ≤30 | FSN-I:0.08 FSS-C:0.026 |
10000 |
| 100 | 2.4 | 0.24 | 4.8 | 0.49 | 3.3 | 0.34 | 9 | 0.92 | 10000 | |||||
| 11 | 50 | 3.5 | 0.36 | 8.3 | 0.85 | 5.5 | 0.56 | 17 | 1.73 | 8500 | 3500 | ≤30 | FSS-I:0.13 FSN-I:0.17 FSS-C:0.05 |
10000 |
| 100 | 5 | 0.51 | 11 | 1.12 | 8.9 | 0.91 | 25 | 2.55 | 10000 | |||||
| 14 | 50 | 5.4 | 0.55 | 18 | 1.8 | 6.9 | 0.7 | 35 | 3.6 | 8500 | 3500 | ≤20 | FSS-I/II:0.51 FSS-C:0.09 FSN-I/II:0.39 FSSF-I:0.51 |
10000 |
| 80 | 7.8 | 0.8 | 23 | 2.4 | 11 | 1.1 | 47 | 4.8 | 15000 | |||||
| 100 | 7.8 | 0.8 | 28 | 2.9 | 11 | 1.1 | 54 | 5.5 | 15000 | |||||
|
17 |
50 | 16 | 1.6 | 34 | 3.5 | 26 | 2.6 | 70 | 7.1 |
7300 |
3500 |
≤20 |
FSS-I/II: 0.67 FSS-C: 0.15 FSN-I/II: 0.52 FSSF-I: 0.67 |
10000 |
| 80 | 22 | 2.2 | 43 | 4.4 | 27 | 2.7 | 87 | 8.9 | 15000 | |||||
| 100 | 24 | 2.4 | 54 | 5.5 | 39 | 4 | 108 | 11 | 15000 | |||||
| 120 | 24 | 2.4 | 54 | 5.5 | 39 | 4 | 86 | 8.8 | 15000 | |||||
|
20 |
50 | 25 | 2.5 | 56 | 5.7 | 34 | 3.5 | 98 | 10 |
6500 |
3500 |
≤20 |
FSS-I/II: 0.96 FSS-C: 0.28 FSN-I/II: 0.73 FSSF-I: 0.96 |
10000 |
| 80 | 34 | 3.5 | 74 | 7.5 | 47 | 4.8 | 127 | 13 | 15000 | |||||
| 100 | 40 | 4.1 | 82 | 8.4 | 49 | 5 | 147 | 15 | 15000 | |||||
| 120 | 40 | 4.1 | 87 | 8.9 | 49 | 5 | 147 | 15 | 15000 | |||||
| 160 | 40 | 4.1 | 92 | 9.4 | 49 | 5 | 147 | 15 | 15000 | |||||
|
25 |
50 | 39 | 4 | 98 | 10 | 55 | 5.6 | 186 | 19 |
5600 |
3500 |
≤20 |
FSS-I/II: 1.46 FSS-C: 0.42 FSN-I/II: 1.14 FSSF-I: 1.46 |
10000 |
| 80 | 63 | 6.4 | 137 | 14 | 87 | 8.9 | 255 | 26 | 15000 | |||||
| 100 | 67 | 6.8 | 157 | 16 | 108 | 11 | 284 | 29 | 15000 | |||||
| 120 | 67 | 6.8 | 167 | 17 | 108 | 11 | 304 | 31 | 15000 | |||||
| 160 | 67 | 6.8 | 176 | 18 | 108 | 11 | 314 | 32 | 15000 | |||||
|
32 |
50 | 76 | 7.8 | 216 | 22 | 108 | 11 | 382 | 39 |
4800 |
3500 |
≤20 |
FSS-I/II: 3.11 FSS-C: 0.89 FSN-I/II: 2.47 |
10000 |
| 80 | 118 | 12 | 304 | 31 | 167 | 17 | 568 | 58 | 15000 | |||||
| 100 | 137 | 14 | 333 | 34 | 216 | 22 | 647 | 66 | 15000 | |||||
| 120 | 137 | 14 | 353 | 36 | 216 | 22 | 686 | 70 | 15000 | |||||
| 160 | 137 | 14 | 372 | 38 | 216 | 22 | 686 | 70 | 15000 | |||||
|
40 |
50 | 137 | 14 | 402 | 41 | 196 | 20 | 686 | 70 |
4000 |
3000 |
≤20 |
FSS-I/II: 4.6 FSS-C: 1.7 FSN-I/II: 3.64 FSSF-I: 4.6 |
10000 |
| 80 | 206 | 21 | 519 | 53 | 284 | 29 | 980 | 100 | 15000 | |||||
| 100 | 265 | 27 | 568 | 58 | 372 | 38 | 1080 | 110 | 15000 | |||||
| 120 | 294 | 30 | 617 | 63 | 451 | 46 | 1180 | 120 | 15000 | |||||
| 160 | 294 | 30 | 647 | 66 | 451 | 46 | 1180 | 120 | 15000 | |||||
Application
Industrial Robot
Service Robots
Meal Machine Tools
Medical Devices
Analysis,Test Equipment
Energy Related Equipment
Papermaking Equipment
Frequently Asked Questions
Laifual shall not be liable for consequential damages of others equipment cause by the defective products. and shall not be liable for the incidental and consequential expenses and the labor costs for detaching and installing to the driven equipment.
Laifual shall not be liable for consequential damages of others equipment cause by the defective products. and shall not be liable for the incidental and consequential expenses and the labor costs for detaching and installing to the driven equipment.
Laifual shall not be liable for consequential damages of others equipment cause by the defective products. and shall not be liable for the incidental and consequential expenses and the labor costs for detaching and installing to the driven equipment.
Laifual shall not be liable for consequential damages of others equipment cause by the defective products. and shall not be liable for the incidental and consequential expenses and the labor costs for detaching and installing to the driven equipment.
