Full specification
| Parameter | Value |
|---|---|
| Frame | Φ57 × 53.3 mm · P variants 56.5 mm |
| Ratio | 40:1 · planetary |
| Version 9 N·m | 9 N·m rated / 27 N·m peak · 362 g (381 g for P) |
| Version 12 N·m (V1.1) | 12 N·m rated / 40 N·m peak · 362 g (381 g for P) |
| 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 |
| Torque sensor | None — current-loop torque control only |
| Typical axes | Wrist pitch, small elbow, gimbal, ankle of a small quadruped |
Source: DAMIAO 2026 product selection catalogue, DM-J planetary series. Figures verified November 2026 — confirm the exact variant against the datasheet issued with your order.
When this is the right choice
- Three times the torque of DM-J4310 in the same Φ57 envelope. 40 N·m peak at 362 g is the highest density in the DM-J range.
- Peak-to-rated ratio of 3.3× leaves room for the acceleration peak without oversizing the motor.
- Drop-in for existing DM-J4310 mounting — same diameter, different length and ratio.
- Absolute position on the output side, no homing sequence.
When it is the wrong choice
- Axes that must hold at power-off. No brake anywhere in the series.
- Contact-rich tasks needing measured torque. No sensor; current-loop control is not a measurement.
- Speed-critical high-ratio work. 40:1 costs output speed against the 10:1 DM-J4310.
Alternatives at a similar level
- DAMIAO DM-J4310 — 3–5.2 N·m at 306–370 g — faster, lower torque
- DAMIAO DM-J6216 — 10 N·m rated, 45 N·m peak at 740 g in a Φ67 frame
- Crabnova CE-RBV3-R58-101 — 20–45 N·m with brake and 70 N·m sensor, 0.495 kg
- Tongchuan TCHL-14 — 6.5 N·m harmonic at 0.45 kg with torque-sensor option
Quote this model
Model, quantity and destination is enough to start — we come back with price, availability and the datasheet.
DM-J4340 FAQ
9 N·m or 12 N·m version?
The V1.1 winding raises rated torque to 12 N·m and peak to 40 N·m at the same mass. Unless you are matching an existing build, take V1.1.
What does the P suffix change?
A different output interface and 19 mm more length (56.5 vs 53.3 mm). Torque is the same as the equivalent non-P version.
Can it replace a DM-J4310 without changing brackets?
Same Φ57 diameter, longer body. Check the axial space before you commit — that is the only obstacle in most builds.
How long does it take to ship?
Confirmed per order at quotation.
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