Product Description
150nm rated torque, 18r/min rated speed, high-precision cross roller bearings, suitable for low-speed and heavy-load scenarios, high rigidity, strong anti-overturning, widely used in turntables, robot joints and other precision transmission fields.

Port Definition | Port Description |
①EtherCAT_OUT | EtherCAT output |
②EtherCAT_In | EtherCAT input |
③CAN_H | CAN_H network signal terminal |
④CAN_L | CAN_L network signal terminal |
⑤GND | Power supply negative pole |
⑥VCC | Power supply positive pole |
⑦BAT- | Multi-turn battery negative pole |
⑧BAT+ | Multi-turn battery positive pole |
⑨RES- | Discharge resistor port |
⑩RES+ | Discharge resistor port |
⑪ T+ | Master sends control command to module |
⑫ T- | Module sends status feedback to master |
⑬ R+ | Master reflects module status data |
⑭ R- | Module reflects master control command |

Compact structure
Hollow hole diameter 20mm
Diameter 132mm
Height 108.4mm
Weight (N/B) 4.32/4.74kg
Exploded view
This product adopts a highly integrated design, with a compact and lightweight overall structure, and perfectly integrates core functional modules such as high-performance FOC vector control drive board, high-precision multi-turn absolute encoder, high-torque density frameless torque motor and precision harmonic reduction transmission mechanism. It realizes the integrated integration of drive control, position feedback, power output and precision reduction.

1. Motor back cover
2. Contol board
3. Encoder
4. Stator casing
5. Motor rotor
6. Motor stator
7. Harmonic drive
8. Flex spline cover
Dual encoders

Equipped with dual 17-bit absolute encoders,
it supports single-turn/multi-turn power-off memory,
fully closed-loop control to accurately compensate for transmission errors,
and maintains high precision for a long time without wear.
Crossed roller bearings

The 90° cross-arranged roller design can simultaneously withstand radial,
axial loads and overturning moments,
and have high precision, high rigidity,
high load capacity and excellent operating stability.
Product parameters
Parameters | Unit | RH - 14 | RH-17 | RH-20 | RH-25 | RH-32 |
Reduction ratio | - | 100 | 100 | 100 | 100 | 100 |
Input voltage | V | 48 | 48 | 48 | 48 | 48 |
No-load speed | RPM | 30 | 30 | 30 | 30 | 20 |
No-load current | A | 0.9 | 145 | 2.59 | 1.61 | 3.9 |
Rated speed | RPM | 25 | 25 | 25 | 25 | 18 |
Rated torque | N.m | 11 | 35 | 50 | 108 | 150 |
Rated power | W | 100 | 180 | 250 | 400 | 700 |
Rated current | A | 6.5 | 9 | 13 | 16 | 20 |
Peak torque | N.m | 28 | 54 | 80 | 157 | 229 |
Peak current | A | 16.25 | 13.86 | 20.8 | 23.2 | 33.44 |
Back EMF constant | Vdc/kgm | 1.39 | 2.79 | 2.79 | 4.89 | 6.28 |
Torque constant | N.m/A | 0.02 | 0.04 | 0.04 | 0.07 | 0.09 |
Line resistance | Ω | 0.62 | 0.7 | 0.36 | 0.155 | 0.08 |
Line inductance | mH | 0.43 | 0.47 | 0.51 | 0.33 | 0.18 |
Number of pole pairs | - | 10 | 10 | 10 | 10 | 10 |
Wiring method | - | Y | Y | Y | Y | Y |
Backlash | Arcsec | - | <20 | <20 | <20 | <20 |
Weight (N) | KG | 0.78 | 1.11 | 1.45 | 2.42 | 4.32 |
Weight (B) | KG | / | 1.28 | 1.75 | 2.74 | 4.74 |
Encoder type and interface | - | Dual encoder/ABS - 17bit | ||||
Repeat positioning accuracy | Degree | <0.01 | ||||
Communication method | - | CAN / EtherCAT | ||||
Insulation level | - | F |
*1. Standard motors only support non-brake.
*2. Standard motors support CAN bus and EtherCAT.
*3. Standard motors do not have waterproof function. If you need IP54, please contact sales before ordering.
*4. This product also supports 50:1 reduction ratio. Please contact sales to confirm delivery time before ordering.
*5. Rated torque test method: Under ambient temperature of 24 degrees Celsius (no other heat dissipation method), the motor torque reaches temperature balance under the condition of 60 degrees temperature rise and can work for a long time. The rated torque value of the motor.
Application
150Nm high torque, 18r/min precision rotation, built-in dual encoders for high-precision positioning, cross roller bearings with strong load-bearing capacity, suitable for high-rigidity transmission modules such as robot joints and turntables.

FAQ
1. Does it support waterproof and dustproof? What is the protection level?
Yes, our joint module can be customized with waterproof and dustproof functions according to customer needs.
The standard version is not waterproof for indoor applications, and can be equipped with IP54 protection, which is suitable for certain outdoor or humid environments.
If you have higher protection requirements, you can contact us for customization.
2. Does it support customized reduction ratio?
Yes. We can provide customized solutions with different reduction ratios according to your application requirements.
The conventional reduction ratio range covers: 100:1, and supports customized 50:1 reduction ratio.
3. What is the difference between the single encoder and dual encoder versions?
The single encoder version monitors the rotation of the motor end and is suitable for general precision requirements;
the dual encoder version monitors the motor end and the output end at the same time, which can effectively compensate for the backlash and elastic error,
and is suitable for high-precision control and high safety requirements (such as collaborative robots, medical equipment).
4. What communication interfaces can the joint module support?
The standard version is equipped with industrial bus protocols such as CANBus and EtherCAT (need to be customized).
5. Does it support integrated drive and control? Can it be directly connected to the controller?
We provide optional integrated drive and control joint modules with built-in motor drivers and position servo controllers.
Users can directly control through the bus or pulse interface without external independent drivers, simplifying wiring and system integration.
6. Are there standard 3D model files available for download?
Yes. We provide 3D model files in STEP format for all models, which is convenient for customers to quickly integrate mechanical design.
If you need to obtain it, please contact our sales staff to obtain the download link or data package.
7. What is the operating temperature range?
The standard operating temperature range is: -10°C ~ +50°C.
If you need to resist low or high temperature application environments (such as cold storage, hot working environment),
special temperature control solutions can be customized.
8. Can the joint module be designed hollow? Can it be wired?
Some models are hollow shaft designs, and the center aperture can be used for wiring, air pipes, water pipes, etc.,
which is convenient for realizing the functional layout of complex end effectors.
For specific center aperture dimensions, please refer to the model selection table or consult customer service.
9. How long is the standard delivery period and customized delivery period?
Standard model delivery period: usually 7-14 working days.
The delivery period for customized requirements (such as protection level customization, reduction ratio customization, communication protocol customization, etc.)
depends on specific requirements, generally 5-10 weeks.
10. How long is the warranty period? How about after-sales service?
All joint module products have a 12-month warranty period (under normal use).
We provide remote technical support, fault diagnosis guidance, and fast spare parts supply services.
Paid repair and maintenance services are also available outside the warranty period.