# 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).

- Manufacturer: DAMIAO
- Part number: DM-J4340-2EC
- Category: Actuators
- Canonical page: https://www.xirkit.io/products/damiao-dm-j4340-2ec-joint-motor-5c25
- Structured JSON: https://www.xirkit.io/products/damiao-dm-j4340-2ec-joint-motor-5c25/data.json
- Source: Xirkit structured parts catalog — every value traced to a cited document; unknowns are explicit.

## Key specifications

| Property | Value |
| --- | --- |
| Actuator type | qdd |
| Gearbox | 40:1 |
| Rated torque | 9 N·m |
| Peak torque | 27 N·m |
| Rated speed | 36 rpm |
| No-load speed | 100 rpm |
| Rated voltage | 48 V |
| Rated current | 2.5 A |
| Encoder | dual magnetic single-turn absolute, 14-bit (motor + output) |
| Control interface | CAN |
| Control modes | MIT (impedance), position-speed, speed |
| Dimensions | 57 × 57 × 53.3 mm |

## Where to buy

| Supplier | Price | Stock | Checked | URL |
| --- | --- | --- | --- | --- |
| aifitlab.com | 155 USD | in_stock | 2026-10-06 | https://aifitlab.com/products/damiao-dm-j4340-2ec-servo-motor?variant=43524854448264 |

## FAQ

**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.

## Sources

- [DAMIAO DM-J4340-2EC Joint Motor datasheet](https://damiao.enactic.ai/en/products/hardware/dm-j4340-2ec-v1.0/)
- [aifitlab.com listing](https://aifitlab.com/products/damiao-dm-j4340-2ec-servo-motor?variant=43524854448264)

## Part graph

### Alternatives (by use case)

- [RobStride 02 QDD Actuator](https://www.xirkit.io/products/robstride-02-qdd-actuator-8a4d) — Both serve robot joints and actuation — check the trade-offs; $145 vs $155
- [CubeMars AK60-6 V3.0 KV80 Actuator](https://www.xirkit.io/products/cubemars-ak60-6-v3-0-kv80-actuator-4518) — Both serve robot joints and actuation — check the trade-offs; $155 vs $229.9
- [ROBOTIS DYNAMIXEL AX-18A](https://www.xirkit.io/products/robotis-dynamixel-ax-18a-491d) — Both serve robot joints and actuation — check the trade-offs; $155 vs $126.39
- [ROBOTIS DYNAMIXEL XC430-T240BB-T](https://www.xirkit.io/products/robotis-dynamixel-xc430-t240bb-t-49c1) — Both serve robot joints and actuation — check the trade-offs; $155 vs $137.89
- [ROBOTIS DYNAMIXEL XC330-M288-T](https://www.xirkit.io/products/robotis-dynamixel-xc330-m288-t-9ce4) — Both serve robot joints and actuation — check the trade-offs; $155 vs $103.39
- [ROBOTIS DYNAMIXEL XC430-W150-T](https://www.xirkit.io/products/robotis-dynamixel-xc430-w150-t-a339) — Both serve robot joints and actuation — check the trade-offs; $155 vs $137.89
- [ROBOTIS DYNAMIXEL XC430-W240-T](https://www.xirkit.io/products/robotis-dynamixel-xc430-w240-t-cbcb) — Both serve robot joints and actuation — check the trade-offs; $155 vs $137.89
- [ROBOTIS DYNAMIXEL 2XC430-W250-T](https://www.xirkit.io/products/robotis-dynamixel-2xc430-w250-t-e00b) — Both serve robot joints and actuation — check the trade-offs; $155 vs $298.89
- [ROBOTIS DYNAMIXEL 2XL430-W250-T](https://www.xirkit.io/products/robotis-dynamixel-2xl430-w250-t-efe2) — Both serve robot joints and actuation — check the trade-offs; $155 vs $149.39

### Pin-compatible

- [DAMIAO DM-J4310-2EC V1.1 Joint Motor](https://www.xirkit.io/products/damiao-dm-j4310-2ec-v1-1-joint-motor-5f3b) — Same Ø57 mm housing and mounting pattern (front 6×M3 on Ø50 and Ø27, rear 4×M3 on Ø38 per the Damiao drawings) — the DM-J4340 (9/27 N·m at) fits the same bracket