Full specification
| Parameter | Value |
|---|---|
| Frame | Φ57 mm · length 46 / 49.05 / 53.3 mm depending on variant |
| Ratio | 10:1 · planetary |
| V1.1 | 3 N·m rated / 7 N·m peak · 306 g · Φ57 × 46 mm |
| V1.2 | 3.5 N·m rated / 12.5 N·m peak · 306 g · Φ57 × 46 mm |
| P | 3.5 N·m rated / 12.5 N·m peak · 330 g · Φ57 × 49.05 mm |
| M | 5.2 N·m rated / 18 N·m peak · 370 g · Φ57 × 53.3 mm |
| Supply | 24 V nominal · 24–48 V supported |
| Encoder | Dual encoder (2EC) · single-turn absolute on the output side |
| Comms | CAN / CAN FD |
| Brake | None — not offered anywhere in the DM-J series |
| Torque sensor | None — current-loop torque control only, no torque feedback |
| Typical axes | Wrist, fingers, small rotary joints, research arms |
Source: DAMIAO 2026 product selection catalogue (DM-J series, ~20 SKUs) and the DM-J4310 variant sheet. Figures verified November 2026 — confirm the exact variant against the datasheet issued with your order.
When this is the right choice
- Wrist and small-axis duty at the right order of magnitude. 5.2 N·m and 370 g is a real servo joint, not a hobby servo, at a size that fits a forearm.
- Cheap to integrate. 24 V, CAN, and a driver stack with published code — the fastest way to put a controllable joint on a research platform.
- Planetary reduction tolerates shock and reversal far better than a harmonic of the same size, which matters on a hand or a wrist that gets bumped.
- Absolute position on the output side from the dual encoder, so no homing routine on every power-up.
When it is the wrong choice
- Any axis that must hold when power drops. There is no brake in this series and no factory option for one — a vertical wrist on DM-J4310 will fall.
- Force-controlled contact. No torque sensor; current-loop torque is a control mode, not a measurement, and it drifts with temperature.
- Above ~18 N·m. DM-J4340 (12/40 N·m) or DM-J6216 (10/45 N·m) sit in the same Φ57–67 envelope with more torque.
Alternatives at a similar level
- DAMIAO DM-J4340-2EC V1.1 — 12 N·m rated, 40 N·m peak, 40:1, 362 g
- DAMIAO DM-J6216L-2EC — 10 N·m rated, 45 N·m peak, 16:1, 740 g
- Crabnova CE-RB-R48-101-Lite — 5 N·m rated harmonic at 0.26 kg, if you need near-zero backlash
- Tongchuan TCHL-17 — 29 N·m rated harmonic at 0.93 kg — the next class up
Quote this model
Model, quantity and destination is enough to start — we come back with price, availability and the datasheet.
DM-J4310 FAQ
Which of the four DM-J4310 variants do I want?
V1.1 is 3/7 N·m at 306 g and the original winding. V1.2 keeps the same Φ57 × 46 mm body and raises the peak to 12.5 N·m. P is the same torque as V1.2 in a 49.05 mm body with a different output interface. M reaches 5.2/18 N·m in a 53.3 mm body at 370 g. If you have the axial space, M is the one to take.
Can I add a brake or a torque sensor?
No. Across the whole DM-J series there is no brake option and no torque sensor — the 2026 catalogue does not contain either feature on any of the roughly twenty SKUs. If you need either, the harmonic lines are where they exist.
24 V or 48 V?
24 V nominal with 24–48 V supported at the same torque. The 48 V variant roughly doubles no-load speed, which is why mobile platforms often order it.
How long does it take to ship?
Confirmed per order at quotation — it depends on the variant and the quantity. The quotation carries the date we are working to.
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