Legged and humanoid robot joints
quasi-direct-drive actuator: 6 N·m rated / 17 N·m peak at 7.75:1, 410 rpm no-load; Seeed lists it for quadrupeds, humanoids and exoskeletons.
Engineering inference
RobStride
RobStride 02 QDD Actuator
RobStride 02 is a 48 V quasi-direct-drive joint actuator: 6 N·m rated (at 100 rpm) and 17 N·m peak through a 7.75:1 planetary reducer, 410 rpm no-load, 7 A rated / 23 A peak phase current, torque constant 1.22 N·m/Arms, 14-bit absolute encoders, CAN 2.0 at 1 Mbps with RobStride, CANopen and MIT protocols. 24–60 V, 380 g, Ø78.5 × 41.5 mm.
RS02Development boardPrice$145.00www.seeedstudio.com · in stock
Buy at www.seeedstudio.com Overview
Motor essentials
Facts about the complete product. Unknown values remain open design questions.
- Rated voltage
- 48 V
- No-load speed
- 410 RPM
- Gear reduction
- 7.75:1
- Encoder
- dual magnetic, 14-bit absolute
A good fit for
Guidance to help you shortlist. The basis is shown for each recommendation.
Robotics and motor control
CAN 2.0 at 1 Mbps with three protocols (RobStride private, CANopen, MIT), current/speed/position modes, 14-bit absolute encoders.
Engineering inferenceNo-load speed, rated performance and stall limits describe different operating points. A stall specification is not a continuous operating rating.
3D model & CAD
3D model & CAD files
Generated from the datasheet's dimensioned drawing and measured against it. Download the STEP to check fit in your own enclosure.
- Envelope (L × W × H)
- 78.5 × 78.5 × 41.5 mm
- Verification
- generated
- Envelope complete
- Yes
Torque & control
Torque, speed and control
What the joint can deliver and how the controller talks to it.
- Type
- QDD
- Gearbox
- planetary 7.75:1
- Rated / peak torque
- 6 / 17 N·m
- No-load speed
- 410 rpm
- Encoder
- dual magnetic, 14-bit absolute
- Control
- CAN · operation control (MIT-style), current, speed, position (CSP), position (PP)
| Connector | Type |
|---|---|
| power_can | XT30PB(2+2)-M power + CAN (mates XT30(2+2)-F, AMASS) |
| swd | SWD download port (SWDIO, SWCLK, 3V3, GND) |
Rated torque is continuous; peak torque is short-duration. Values with two figures (e.g. 24/48 V) are per supply voltage.
Specifications
Motor performance
No-load, rated-load and stall figures retain their separate test conditions.
- Rated voltage
- 48 V
- No-load speed
- 410 RPM
- Continuous rated torque
- 6 N·m
- Rated-load speed
- 100 RPM
- Rated current
- 7 A
Stall torque and current are not continuous ratings. Check the duty cycle and starting load when choosing the driver and power supply.
Thermal limits by level
Product operating conditions, chip ambient ratings, package case limits and junction maxima remain separate.
Motor body
- Product operating range
- -20 to 50 °C
Mechanical dimensions
Reported product dimensions may exclude protruding components. Unknown height does not establish a complete clearance envelope.
- Length
- 78.5 mm
- Width
- 78.5 mm
- Reported height / thickness
- 41.5 mm
Attached generated geometry is an approximate envelope. A generated outline does not establish an electrically verified PCB footprint.
Board connectors
| ID / type | Pins | Pitch | Notes |
|---|---|---|---|
| power_canXT30PB(2+2)-M power + CAN (mates XT30(2+2)-F, AMASS) | 4 | Unknown | — |
| swdSWD download port (SWDIO, SWCLK, 3V3, GND) | 4 | Unknown | — |
Complete structured record
Every available field, including details beyond the summaries. Null means the value has not been established.
Sourcing & files
Supplier offers
US / USD is the target market. Observed price and stock are separate from a delivery quote.
www.seeedstudio.com
US · USD
$145.00Minimum quantity unknown
- Observed stock
- in stock
- Checked
- Oct 6, 2026, 07:36 AM UTC
- Delivery estimate
- Not quoted
Observed within the last 24 hours. Confirm the current supplier quote.
Visit supplier (opens in a new tab)Delivery depends on quantity, postal code and shipping method. A dispatch statement such as “ship today” is not an arrival estimate.
Design files and references
Each source keeps its own verification status. Confirm the part revision and file contents before using it in a design.
Datasheet (opens in a new tab)
Manufacturer reference
RobStride 02 QDD actuator — product photo (Seeed Studio) (opens in a new tab)
Manufacturer reference
inspected: black pancake housing, aluminium front flange with the M3 ring and output hub; matches the p8 outline
STEP (generated from datasheet drawing) — link unavailable
Generated asset
cad_check passed
Generated envelope geometry may also exist for this record. It does not replace manufacturer CAD or a verified electrical land pattern.
Source evidence
Document provenance, retrieval dates and the field groups supported by each source.
Supports: spec.constraints.electrical.supply_voltage_max_v, spec.constraints.electrical.supply_voltage_min_v, spec.constraints.thermal.operating_temp_max_c, spec.constraints.thermal.operating_temp_min_c, spec.geometry.body_diameter_mm, spec.geometry.body_length_mm, spec.geometry.cad.bbox.height_mm, spec.geometry.cad.bbox.length_mm, spec.geometry.cad.bbox.width_mm, spec.geometry.cad.envelope_complete, spec.geometry.cad.mesh_path, spec.geometry.cad.step_path, spec.geometry.cad.verification, spec.geometry.dimensions.height_mm, spec.geometry.dimensions.length_mm, spec.geometry.dimensions.width_mm, spec.geometry.other.weight_g, spec.provides.actuator_type, spec.provides.control_interface, spec.provides.control_modes, spec.provides.encoder, spec.provides.encoder_bits, spec.provides.features, spec.provides.gear_ratio, spec.provides.gear_type, spec.provides.integrated_driver, spec.provides.kt_nm_per_a, spec.provides.motor_type, spec.provides.no_load_speed_rpm, spec.provides.other.insulation_class, spec.provides.other.pole_pairs, spec.provides.peak_torque_nm, spec.provides.rated_speed_rpm, spec.provides.rated_torque_nm, spec.usage.connectors, spec.usage.pinout, spec.usage.pinout_complete, spec.usage.requirements.other.peak_current_a, spec.usage.requirements.rated_current_a, spec.usage.requirements.rated_voltage_v
sha256 87baa04792996978d1d4edc4176cd583e695e8bc09a65f97fc982b2e0a7f71b7
Supports: offers
FAQ
RobStride 02 QDD Actuator questions
What voltage powers the RobStride 02 QDD Actuator?
Supply range 48–48 V.
How much does the RobStride 02 QDD Actuator cost?
From $145 at www.seeedstudio.com. Prices are observed unit prices before tax and shipping.
What are the RobStride 02 QDD Actuator dimensions?
78.5 × 78.5 × 41.5 mm. A STEP model is available for enclosure fit checks.
Where does this RobStride 02 QDD Actuator data come from?
Every value in this record is traced to a source — 2 documents including the board and chip datasheets — with the page and table cited per value. Unknowns are left explicit, never guessed.