# Waveshare DDSM210 Direct Drive Hub Motor

> Waveshare DDSM210 direct-drive hub servo motor (outer-rotor brushless, FOC driver and encoder built in): 0.25 N·m rated at 98 rpm / 0.5 A, 0.85 N·m locked-rotor, 210 rpm no-load at 14.4 V, UART bus, zero-backlash direct drive with tyre, Ø74.5 × 24.5 mm, 260 g.

- Manufacturer: Waveshare
- Part number: DDSM210
- Category: Actuators
- Canonical page: https://www.xirkit.io/products/waveshare-ddsm210-direct-drive-hub-motor-3b09
- Pinout: https://www.xirkit.io/products/waveshare-ddsm210-direct-drive-hub-motor-3b09/pinout
- Structured JSON: https://www.xirkit.io/products/waveshare-ddsm210-direct-drive-hub-motor-3b09/data.json
- Source: Xirkit structured parts catalog — every value traced to a cited document; unknowns are explicit.

## Key specifications

| Property | Value |
| --- | --- |
| Actuator type | direct_drive |
| Rated torque | 0.25 N·m |
| Peak torque | 0.85 N·m |
| Rated speed | 98 rpm |
| No-load speed | 210 rpm |
| Rated voltage | 14.4 V |
| Rated current | 0.5 A |
| Torque constant Kt | 0.23 N·m/A |
| Encoder | 12-bit position sensing |
| Control interface | UART |
| Dimensions | 74.5 × 74.5 × 24.5 mm |
| Operating temperature | -25 to 45 °C |

## Pinout (4 pins, 0 with electrical limits)

| Pin | Position | Kind | Chip pad | Functions | VIH | VIL | VOH | VOL | IOH | IOL | 5 V tolerant |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| UART | 1 | signal | — | uart | — | — | — | — | — | — | — |
| UART | 2 | signal | — | uart | — | — | — | — | — | — | — |
| GND | 3 | ground | — | ground | — | — | — | — | — | — | — |
| VCC | 4 | power in | — | power_in | — | — | — | — | — | — | — |

## Where to buy

| Supplier | Price | Stock | Checked | URL |
| --- | --- | --- | --- | --- |
| www.waveshare.com | 23.99 USD | in_stock | 2026-10-02 | https://www.waveshare.com/ddsm210.htm |

## FAQ

**What voltage powers the Waveshare DDSM210 Direct Drive Hub Motor?**

Supply range 14.4–14.4 V.

**How much does the Waveshare DDSM210 Direct Drive Hub Motor cost?**

From $23.99 at www.waveshare.com. Prices are observed unit prices before tax and shipping.

**What are the Waveshare DDSM210 Direct Drive Hub Motor dimensions?**

74.5 × 74.5 × 24.5 mm. A STEP model is available for enclosure fit checks.

**Where does this Waveshare DDSM210 Direct Drive Hub 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

- [Waveshare DDSM210 Direct Drive Hub Motor datasheet](https://www.waveshare.com/ddsm210.htm)
- [www.waveshare.com listing](https://www.waveshare.com/ddsm210.htm)

## Part graph

### Alternatives (by use case)

- [Waveshare DDSM400 Direct Drive Hub Motor](https://www.xirkit.io/products/waveshare-ddsm400-direct-drive-hub-motor-86f3) — Both serve mobile robot drive trains — check the trade-offs; $23.99 vs $25.99
- [Waveshare ST3215-HS Servo 20 kg·cm 12 V](https://www.xirkit.io/products/waveshare-st3215-hs-servo-20-kg-cm-12-v-c2c5) — Both serve mobile robot drive trains — check the trade-offs; $23.99 vs $21.99