Robot arm joints (Enactic OpenArm)
quasi-direct-drive actuator: 9 N·m rated / 27 N·m peak at 40:1, 100 rpm no-load; OpenArm uses 1 per arm (Foxtech OpenArm configuration).
Engineering inference
DAMIAO
DAMIAO DM-J4340-2EC Joint Motor
DAMIAO DM-J4340-2EC is a geared joint motor with its driver built in: 9 N·m rated / 27 N·m peak through a 40:1 reduction, 36 rpm rated, no-load 52 rpm in the 24 V build and 100 rpm in the 48 V build, 2.5 A rated / 8 A peak, dual 14-bit magnetic encoders, CAN at 1 Mbps with MIT, position and speed modes. Ø57 × 53.3 mm, about 362 g. The J4340P adds a crossed-roller output bearing (56.5 mm, 375 g).
DM-J4340-2ECDevelopment boardPrice$155.00aifitlab.com · in stock
Buy at aifitlab.com Overview
Motor essentials
Facts about the complete product. Unknown values remain open design questions.
- Rated voltage
- 48 V
- No-load speed
- 100 RPM
- Gear reduction
- 40:1
- Encoder
- dual magnetic single-turn absolute, 14-bit (motor + output)
A good fit for
Guidance to help you shortlist. The basis is shown for each recommendation.
Robotics and motor control
CAN at 1 Mbps with MIT impedance, position and speed modes; position, velocity, torque and temperature feedback; dual 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)
- 57 × 57 × 53.3 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
- Rated / peak torque
- 9 / 27 N·m
- No-load speed
- 100 rpm
- Encoder
- dual magnetic single-turn absolute, 14-bit (motor + output)
- Control
- CAN · MIT (impedance), position-speed, speed
| Connector | Type |
|---|---|
| power_can | XT30(2+2)-F power + CAN connector |
| debug_uart | GH1.25 3-pin debugging serial port |
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
- 100 RPM
- Continuous rated torque
- 9 N·m
- Rated-load speed
- 36 RPM
- Rated current
- 2.5 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
Mechanical dimensions
Reported product dimensions may exclude protruding components. Unknown height does not establish a complete clearance envelope.
- Length
- 57 mm
- Width
- 57 mm
- Reported height / thickness
- 53.3 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_canXT30(2+2)-F power + CAN connector | 4 | Unknown | — |
| debug_uartGH1.25 3-pin debugging serial port | 3 | 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.
aifitlab.com
US · USD
$155.00Minimum quantity unknown
- Observed stock
- in stock
- Checked
- Oct 6, 2026, 07:32 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
DAMIAO DM-J4340-2EC joint motor — product photo (Damiao manual) (opens in a new tab)
Manufacturer reference
inspected: black cylindrical motor, aluminium output flange, GH1.25 port at the base; the photo at the top of the maker manual
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.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.integrated_driver, spec.provides.motor_type, spec.provides.no_load_speed_rpm, 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_complete, spec.usage.requirements.other.peak_current_a, spec.usage.requirements.rated_current_a, spec.usage.requirements.rated_voltage_v
sha256 e8dec36365ca008df913f428d191b8f73cf7669ab3ad42cbd4dd0420a5094f77
Supports: offers
FAQ
DAMIAO DM-J4340-2EC Joint Motor questions
What voltage powers the DAMIAO DM-J4340-2EC Joint Motor?
Supply range 24–48 V.
How much does the DAMIAO DM-J4340-2EC Joint Motor cost?
From $155 at aifitlab.com. Prices are observed unit prices before tax and shipping.
What are the DAMIAO DM-J4340-2EC Joint Motor dimensions?
57 × 57 × 53.3 mm. A STEP model is available for enclosure fit checks.
Where does this DAMIAO DM-J4340-2EC Joint Motor 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.