Zero Backlash Harmonic Drive System Servo Actuator HPJM-RE70-90-PRO-XX
The harmonic actuator achieves highly precise motion control through integrated components, including a harmonic drive, frameless torque motor, brake, encoder, and drive unit, with optimized size and weight. It delivers greater torque, higher precision, a more compact size, and a lighter weight. We also provide customization services according to customers’ specific requirements. Robot Joint Motors typically support a wide voltage range of DC24V~DC48V. As a core component in the robotics industry, the technological advancement of Robot Joint Motors will continue to promote the development of specialized robots and humanoid robots towards higher flexibility and broader application scenarios. Beyond robotics, Robot Joint Motors are also applied in semiconductor equipment, photovoltaic equipment, precision medical equipment, 3C equipment, optical equipment, and other fields.
Core Components
- Power Unit (Frameless Torque Motor): Provides high torque density and compact structure, suitable for high dynamic load scenarios.
- Harmonic Drive: achieves speed reduction and torque multiplication, featuring zero backlash and high precision (backlash controlled within 20 arcsec).
- Dual Encoders (Motor-side + Output-side): Support full closed-loop control with repeat positioning accuracy of ±10 arcsec.
- Temperature Sensor: Monitors load and environmental status in real time to enhance safety and adaptability.
- Embedded Drive Unit: Supports protocols like EtherCAT and CANopen, enabling dynamic PID adjustment.
Features
- Superior precision & zero backlash
- High Precision and Zero Backlash
Zero-backlash design eliminates transmission clearance of traditional reducers, achieving repeat positioning accuracy of ±10 arcsec and absolute positioning accuracy of ±30 arcsec, suitable for precision motion control scenarios (e.g., surgical robots, collaborative robotic arms).
3D Conjugate Dual-Arc Tooth Profile Technology
Optimizes tooth profile structure, reduces vibration and noise, improves transmission stiffness and service life, enabling smoother and more precise robot movements.
- Highly Integrated, Compact, and Lightweight Design
- Compact size and light weight
The high integration of the harmonic drive and frameless torque motor results in a compact structure, suitable for space-constrained scenarios (e.g., robot wrists, head joints).
- Lightweight material application: Uses high-strength aluminum alloy, carbon fiber, and other materials to reduce weight and improve robot energy efficiency and flexibility.
- High Transmission Efficiency:Â Transmission efficiency exceeds 80%, reducing energy loss and supporting efficient power transmission under dynamic load changes.
- High Safety and Reliability:Â Torque sensor integration (customizable). Supports collision detection and drag teaching functions, enhancing human-robot collaboration safety.
- Impact resistance and long service life:Â The harmonic drive can withstand high-load emergency stops, with a designed precision lifespan exceeding 10,000 hours, suitable for harsh industrial environments.
- Intelligent Integration and Control:Â Embedded controller with multi-protocol compatibility: Supports communication protocols like EtherCAT and CANopen, enabling dynamic PID adjustment.
- Modular design: Standardized interfaces facilitate quick integration and maintenance.
Specifications
| Starting torgue of FHG series | unit:cNm | ||||||
| Â Â Â Â Â Â Type Reduction ratio |
11 | 14 | 17 | 20 | 25 | 32 | 40 |
| 50 | 一 | 8.8 | 27 | 36 | 56 | 85 | 136 |
| 80 | 一 | 7.5 | 25 | 33 | 50 | 74 | 117 |
| 100 | 一 | 6.9 | 24 | 32 | 49 | 72 | 112 |
| 120 | 一 | 6.9 | 24 | 31 | 48 | 68 | 110 |
| 160 | 一 | 一 | 一 | 31 | 47 | 67 | 105 |
| Moment load table of FHT(FHG)series | ||
| Model | Design value | Instant permissible value |
| FHG-14 | Mbdi 41Nm | Mb max 80Nm |
| Ftdi270N | Ft max 490N | |
| Fa di 270N | F a max 490N | |
| FHG-17 | M bdi 72Nm | Mb max 140Nm |
| Ftdi400N | Ft max 700N | |
| Fa di 400N | F a max 700N | |
| FHG-20 | M bdi 140Nm | Mb max 280Nm |
| Ftdi650N | Ft max 1150N | |
| Fa di 650N | F a max 1150N | |
| FHG-25 | M bdi 243Nm | Mb max 480Nm |
| Ft di 900N | Ft max 1600N | |
| Fa di900N | Fa max 1600N | |
| FHG-32 | M bdi 460Nm | Mb max 900Nm |
| Ftdi 1350N | Ftmax 2300N | |
| Fa di 1350N | Fa max 2300N | |
| FHG-40 | M bdi 600Nm | Mb max 1200Nm |
| Ft di 2000N | Ftmax 3500N | |
| Fa di 2000N | F a max 3500N | |
| odel | Reduction ratio |
Rated torque at 2000r/min input |
Permissible peak torque at start and stop |
Permissible maximum value for average load torque |
Permissible maximum value for average load  torque | Permissible maximum input rotational speed(Grease) |
Backlash | weight | Desian life | |||||
| Nm | kgfm | Nm | kgfm | Nm | kgfm | Nm | kgfm | r/min | r/min | Arc Sec | kg | Hour | ||
| 14 | 50 | 7 | 0.7 | 23 | 2.3 | 9 | 0.9 | 46 | 4.7 | 8500 | 3500 | ≤20 | FHG-I/II:0.40 FHG-III:0.7 FHG-IV:0.66 FHG-V:0.40 |
10000 |
| 80 | 10 | 1.0 | 30 | 3.1 | 14 | 1.4 | 61 | 6.2 | 15000 | |||||
| 100 | 10 | 1.0 | 36 | 3.7 | 14 | 1.4 | 70 | 7.2 | 15000 | |||||
| 120 | 10 | 1.0 | 36 | 3.7 | 14 | 1.4 | 70 | 7.2 | 15000 | |||||
| 17 | 50 | 21 | 2.1 | 44 | 4.5 | 34 | 3.4 | 91 | 9 | 7300 | 3500 | ≤20 | FHG-I/II:0.54 FHG-III:0.99 FHG-IV:0.90 FHG-V:0.62 |
10000 |
| 80 | 29 | 2.9 | 56 | 5.7 | 35 | 3.6 | 113 | 12 | 15000 | |||||
| 100 | 31 | 3.2 | 70 | 7.2 | 51 | 5.2 | 143 | 15 | 15000 | |||||
| 120 | 31 | 3.2 | 70 | 7.2 | 51 | 5.2 | 112 | 11 | 15000 | |||||
| 20 | 50 | 33 | 3.3 | 73 | 7.4 | 44 | 4.5 | 127 | 13 | 6500 | 3500 | ≤20 | FHG-I/II:0.72 FHG-III:1.32 FHG-IV:1.29 FHG-V:0.82 |
10000 |
| 80 | 44 | 4.5 | 96 | 9.8 | 61 | 6.2 | 165 | 17 | 15000 | |||||
| 100 | 52 | 5.3 | 107 | 10.9 | 64 | 6.5 | 191 | 20 | 15000 | |||||
| 120 | 52 | 5.3 | 113 | 11.5 | 64 | 6.5 | 191 | 20 | 15000 | |||||
| 160 | 52 | 5.3 | 120 | 12.2 | 64 | 6.5 | 191 | 20 | 15000 | |||||
| 25 | 50 | 51 | 5.2 | 127 | 13 | 72 | 7.3 | 242 | 25 | 5600 | 3500 | ≤20 | FHG-I/II:1.22 FHG-III:2.02 FHG-IV:1.99 FHG-V:1.40 |
10000 |
| 80 | 82 | 8.4 | 178 | 18 | 113 | 12 | 332 | 34 | 15000 | |||||
| 100 | 87 | 8.9 | 204 | 21 | 140 | 14 | 369 | 38 | 15000 | |||||
| 120 | 87 | 8.9 | 217 | 22 | 140 | 14 | 395 | 40 | 15000 | |||||
| 32 | 50 | 99 | 10 | 281 | 29 | 140 | 14 | 497 | 51 | 4800 | 3500 | ≤20 | FHG-I/II:2.54 FHG-IIV:4.20 FHG-IV:4.00 FHG-V:2.70 |
10000 |
| 80 | 153 | 16 | 395 | 40 | 217 | 22 | 738 | 75 | 15000 | |||||
| 100 | 178 | 18 | 433 | 44 | 281 | 29 | 841 | 86 | 15000 | |||||
| 120 | 178 | 18 | 459 | 47 | 281 | 29 | 892 | 91 | 15000 | |||||
| 40 | 50 | 178 | 18 | 523 | 53 | 255 | 26 | 892 | 91 | 4000 | 3000 | ≤20 | FHG-I/IV:4.40 FHG-III:7.20 FHG-IV:7.00 FHG-V:4.06 |
10000 |
| 80 | 268 | 27 | 675 | 69 | 369 | 38 | 1270 | 130 | 15000 | |||||
| 100 | 345 | 35 | 738 | 75 | 484 | 49 | 1400 | 143 | 15000 | |||||
| 120 | 382 | 39 | 802 | 82 | 586 | 60 | 1530 | 156 | 15000 | |||||







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