ROBSTRIDE03 is a 60 N.m peak-torque actuator for more heavily loaded robot joints. This quasi-direct-drive robot joint motor integrates a brushless motor, a 9:1 machined-steel reducer, FOC drive electronics and dual magnetic encoders in one assembly. It provides 60 N.m peak torque for transient motion demands within its electrical and thermal limits.
The actuator uses a 48 V nominal supply and 1 Mbps CAN communication. Its 20 N.m rated torque is tested at 100 rpm with heat sinking. The 200 rpm +/- 10% no-load speed is a separate operating condition. The 9:1 reducer and dual magnetic encoders provide an integrated platform for manipulator and legged-robot experiments that need more torque than the 17 N.m models.
For robotic arms, legged-robot prototypes, education and custom automation, the integrated module reduces the number of separate drive components to package. Its 880 g +/- 20 g mass should be considered alongside load inertia, mounting stiffness and cooling when selecting a joint. The technical files below support CAD integration, CAN configuration and bench commissioning.
Features
- Integrated QDD module - Combines motor, reduction gearing, FOC electronics and encoder feedback for compact robotic joint integration.
- 60 N.m peak torque - Provides transient output capability; choose the motion profile using the torque-speed and overload data, not peak torque alone.
- 20 N.m rated torque - Requires heat sinking and is tested at 100 rpm.
- Dual magnetic encoders - Provides integrated position feedback for closed-loop joint control and commissioning.
- 9:1 machined-steel gearing - Balances output torque, speed and packaging for the intended mechanism. The 9:1 reducer and dual magnetic encoders provide an integrated platform for manipulator and legged-robot experiments that need more torque than the 17 N.m models.
- 48 V nominal power - Uses the 24-60 V DC operating range specified in the linked user manual. Design wiring, protection and braking-energy handling for the complete system.
- FOC and bidirectional control - Supports CW/CCW motion with documented current, velocity, position and operation-control workflows.
- 1 Mbps CAN interface - Supports command and feedback exchange with a compatible host. Check CAN IDs, termination and firmware protocol before combining multiple axes.
- Mechanical integration - A 106 x 106 x 56 mm envelope and 880 g +/- 20 g mass support CAD-level joint planning. Check the mounting drawing for detailed hole locations and clearances.
- Technical development files - Model-specific English documentation and a 3D CAD model support mechanical design, wiring, parameter setup and software integration.
Specifications
| Parameter | Value |
|---|---|
| Model | RobStride 03 |
| Product Type | QDD integrated robot joint motor module |
| Size | 106 x 106 x 56 mm |
| Weight | 880 g +/- 20 g |
| Protection Level | IP52 |
| Electrical Terminal Interface | XT30 + GH1.25 |
| Poles | 42 |
| Phases | 3 |
| Drive Method | FOC |
| Reduction Ratio | 9:1 |
| Gear Material | Machined Steel |
| Rated Voltage | 48 V DC |
| Voltage Range | 24-60 V DC |
| Rated Torque | 20 N.m, with heat sinking |
| Peak Torque | 60 N.m |
| No-load Speed | 200 rpm +/- 10% |
| No-load Current | 2 Arms |
| Rated Torque Test Speed | 100 rpm |
| Rated Load Phase Current | 13 Apk +/- 10% |
| Peak Phase Current | 43 Apk +/- 10% |
| Back-EMF | 17 Vrms/krpm +/- 10% |
| Line Resistance | 0.39 Ohm +/- 10% |
| Torque Constant | 2.36 N.m/Arms |
| Inductance | 0.275mH +/- 10% |
| Encoder | Magnetic Encoder x 2 |
| Temperature Range | -20~50 deg C |
| Humidity Range | 5-85% RH, non-condensing |
| Storage Temperature Range | -30~70 deg C |
| Insulation Level | Class B |
| Insulation Resistance / Stator Winding | 100 MOhm |
| High Voltage Resistance / Stator and Casing | 600VAC, 1s, 2mA |
| Encoder Resolution | 14-bit single-turn absolute |
| CAN Bus Baud Rate | 1 Mbps |
| Rated Torque Heat Sink | 215 x 220 mm |
Thermal design is part of actuator selection. Account for the heat path into the mounting structure, ambient conditions and duty cycle. Rated rotating torque is not automatically a continuous stall rating.
Product Comparison
| Model | Peak Torque | Rated Torque / Test Speed | Rated Voltage | Voltage Range | Dimensions | Weight | Protection | Feedback | Ratio | No-load Speed |
|---|---|---|---|---|---|---|---|---|---|---|
| ROBSTRIDE00 | 14 N.m | 5 N.m at 100 rpm | 48 V | 24-60 V | 57 x 57 x 51 mm | 310 g +/- 3 g | Not specified | 2 magnetic encoders | 10:1 | 315 rpm +/- 10% |
| ROBSTRIDE01 | 17 N.m | 6 N.m at 100 rpm | 36 V | 24-50 V | 78.5 x 78.5 x 40 mm | 380 g +/- 3 g | IP52 | 1 magnetic encoder | 7.75:1 | 315 rpm +/- 10% |
| ROBSTRIDE02 | 17 N.m | 6 N.m at 100 rpm | 48 V | 24-60 V | 78.5 mm diameter; 41.5 mm body depth | 380 g +/- 3 g | IP52 | 2 magnetic encoders | 7.75:1 | 410 rpm +/- 10% |
| ROBSTRIDE03 | 60 N.m | 20 N.m at 100 rpm | 48 V | 24-60 V | 106 x 106 x 56 mm | 880 g +/- 20 g | IP52 | 2 magnetic encoders | 9:1 | 200 rpm +/- 10% |
| ROBSTRIDE04 | 120 N.m | 40 / 35 N.m | 48 V | 24-60 V | 120 x 120 x 56 mm | 1420 g +/- 20 g | IP52 | 2 magnetic encoders | 9:1 | 200 rpm +/- 10% |
| ROBSTRIDE05 | 5.5 N.m | 1.6 N.m at 100 rpm | 48 V | 15-60 V | 46 x 46 x 44 mm | 191 g +/- 3 g | Not specified | 2 magnetic encoders | 7.75:1 | 480 rpm +/- 10% |
| ROBSTRIDE06 | 36 N.m | 11 N.m at 100 rpm | 48 V | 15-60 V | 88 x 88 x 49 mm | 621 g +/- 3 g | Not specified | 2 magnetic encoders | 9:1 | 480 rpm +/- 10% |
| ROBSTRIDE-EDULITE05 | 6 N.m | 1.8 N.m at 100 rpm | 48 V | 15-60 V | 46 x 46 x 44 mm | 242 g +/- 3 g | Not specified | 2 magnetic encoders | 9:1 | 430 rpm +/- 10% |
| ROBSTRIDE02-IP67 | 17 N.m | 6 N.m at 100 rpm | 48 V | 24-60 V | 81 mm diameter; 44 mm maximum body depth | 490 g | IP67 | 2 magnetic encoders | 7.75:1 | 410 rpm +/- 10% |
| ROBSTRIDE 10P | 42 N.m | 14 N.m at 50 rpm | 48 V | 15-60 V | 57 mm diameter; 59.1 mm body length | 460 g +/- 3 g | Not specified | 2 magnetic encoders | 25:1 | 125 rpm +/- 10% |
Rated torque requires the specified heat-sink conditions. ROBSTRIDE04 is rated at 40 N.m with a 345 x 345 mm heat sink, or 35 N.m with a 220 x 200 mm heat sink. Peak torque and no-load speed are separate limits, not a simultaneous continuous operating point.
Hardware Overview
Torque-Speed Performance
Use the 48 V torque-speed curve with the overload and thermal tests in the user manual. Operating duration and cooling determine whether a commanded point is sustainable.
Mechanical Installation
Use the model-specific mounting drawing for the bolt pattern and shaft clearance. Check screw engagement and support the load without forcing the housing.
Power and CAN Connections
The power connector and CAN connector are separate. Verify the illustrated CAN_H, CAN_L, GND and VBAT+ orientation before applying power.
Commission with conservative limits. Secure the mechanism, verify supply and CAN wiring, begin unloaded or lightly loaded, and stop motion before changing control modes.
Application
Robot joint development
Build compact rotary joints for arms, legs, gimbals, and custom motion platforms. The 60 N.m peak capability provides transient torque margin, but the 20 N.m heat-sink-tested rating and the motion cycle govern sustained use.
Humanoid and quadruped research
Prototype controlled joint axes where integrated actuator packaging is useful. Evaluate the 9:1 reduction, mass distribution, acceleration torque and impact loading together. Validate each gait or movement cycle on a secured prototype before increasing the operating limits.
Robotic arms
Develop shoulder, elbow, wrist, or gripper rotary axes for lab automation and manipulation research. Check the load moment at each arm position rather than using payload mass alone. The 20 N.m rated-torque conditions are important for sustained movement and holding tasks.
Mobile robotics
Integrate controlled rotary motion into AMR, AGV, inspection robot, and mechatronic subsystems. Use the 48 V supply and CAN interface as part of the complete subsystem design. Verify cable routing, mounting stiffness and host-side stop behavior before autonomous operation.
Education and training
Teach actuator control, encoder feedback, FOC concepts, and joint tuning workflows. Explore feedback, current commands, velocity and position modes on a bench fixture. Start with the model-specific manual and keep motion limits conservative while learning the control workflow.
Custom automation
Use in low-speed high-torque fixtures, pan-tilt systems, haptic rigs, and test benches. For repeatable test fixtures and custom axes, log position, speed and current while tuning. Plan a suitable thermal path and motion duty cycle, and verify stop behavior before unattended use.
Reference Documents
Manuals and Product Files
Software and Development
Packing List
| SKU | Item | Quantity |
|---|---|---|
| ROBSTRIDE-03 | ROBSTRIDE03 actuator motor module | 1 |
| ROBSTRIDE-Debug | ROBSTRIDE debug board accessory | 1 |
FAQ
ROBSTRIDE03 provides 60 N.m peak torque, a 9:1 reduction and 880 g +/- 20 g mass. ROBSTRIDE04 provides 120 N.m peak torque, a 9:1 reduction and 1420 g +/- 20 g mass. Compare the supply voltage, encoder configuration, mounting and heat-sink requirements as well as torque.
The 9:1 reducer and dual magnetic encoders provide an integrated platform for manipulator and legged-robot experiments that need more torque than the 17 N.m models.
The peak torque is 60 N.m. Rated torque is 20 N.m at the 100 rpm test point. Heat sinking is required. Peak torque is a transient capability and must not be treated as a continuous holding rating.
The nominal supply is 48 V DC. The linked user manual specifies a 24-60 V DC operating range. Size the supply, wiring and protection for the complete system, including voltage transients during braking.
It uses dual magnetic encoders, 14-bit single-turn absolute encoder resolution and a 1 Mbps CAN bus. Check the model-specific command scaling and the installed firmware before integrating it with a host controller.
The motor option contains one ROBSTRIDE03 actuator module and excludes the debug board. The Debug Board option contains one debug board accessory and no motor.
The user manual covers current, velocity, position and operation-control workflows, along with host-software setup. Use a compatible CAN interface and the correct firmware protocol. The official Python CAN examples cover RS00-RS06 through Linux SocketCAN.
No. Peak torque is a transient output limit. Continuous operation depends on speed, winding temperature, heat sinking, ambient conditions and load cycle. Check the thermal and overload curves for the planned duty cycle.
Do not assume this model has the sealed housing of ROBSTRIDE02-IP67. Select enclosure protection, cooling and cable protection for the installation and use a separately specified sealed model where required.
Check the 106 x 106 x 56 mm envelope, the exact mounting drawing, screw depth, output clearance and cable routing. Calculate gravity and acceleration torque, support the mechanism securely, and begin commissioning with conservative current and speed limits.