# goBILDA 5000 Series Motor 8mm REX Shaft

> goBILDA 5000-0002-4008 is the 12 V RS-555 brushed DC motor behind the Yellow Jacket gearmotors: 6000 rpm theoretical / 5800 rpm tested no-load, 1.47 kg cm stall at 9.2 A, 8 mm REX shaft 32 mm long and a 4-ear mounting plate, Ø37.5 mm body ~81.8 mm long, 254 g, and a 3.3–5 V magnetic quadrature encoder (28 counts per revolution).

- Manufacturer: goBILDA
- Part number: 5000-0002-4008
- Category: Motors
- Canonical page: https://www.xirkit.io/products/gobilda-5000-series-motor-8mm-rex-shaft-0d65
- Pinout: https://www.xirkit.io/products/gobilda-5000-series-motor-8mm-rex-shaft-0d65/pinout
- Structured JSON: https://www.xirkit.io/products/gobilda-5000-series-motor-8mm-rex-shaft-0d65/data.json
- Source: Xirkit structured parts catalog — every value traced to a cited document; unknowns are explicit.

## Key specifications

| Property | Value |
| --- | --- |
| Motor type | brushed_dc |
| Rated voltage | 12 V |
| Stall torque | 0.144 N·m |
| No-load speed | 6,000 rpm |
| Shaft diameter | 8 mm |
| Encoder | relative magnetic Hall-effect quadrature encoder, 3.3–5 V |
| Dimensions | 37.5 × 37.5 × 113.8 mm |

## Pinout (2 pins, 0 with electrical limits)

| Pin | Position | Kind | Chip pad | Functions | VIH | VIL | VOH | VOL | IOH | IOL | 5 V tolerant |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| MOTOR | 3.5 mm FH-MC bullet connectors | motor plus | — | motor | — | — | — | — | — | — | — |
| ENC | 4-position JST XH [FH-MC] | signal | — | enc | — | — | — | — | — | — | — |

## Where to buy

| Supplier | Price | Stock | Checked | URL |
| --- | --- | --- | --- | --- |
| www.gobilda.com | 29.99 USD | in_stock | 2026-10-01 | https://www.gobilda.com/5000-series-12vdc-motor-with-8mm-rex-pinion-shaft/ |

## FAQ

**How much does the goBILDA 5000 Series Motor 8mm REX Shaft cost?**

From $29.99 at www.gobilda.com. Prices are observed unit prices before tax and shipping.

**What are the goBILDA 5000 Series Motor 8mm REX Shaft dimensions?**

37.5 × 37.5 × 113.8 mm. A STEP model is available for enclosure fit checks.

**Where does this goBILDA 5000 Series Motor 8mm REX Shaft 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

- [goBILDA 5000 Series Motor 8mm REX Shaft datasheet](https://www.gobilda.com/5000-series-12vdc-motor-with-8mm-rex-pinion-shaft/)
- [www.gobilda.com listing](https://www.gobilda.com/5000-series-12vdc-motor-with-8mm-rex-pinion-shaft/)

## Part graph

### Alternatives (by use case)

- [goBILDA Yellow Jacket 5202-2402-0188](https://www.xirkit.io/products/gobilda-yellow-jacket-5202-2402-0188-0e10) — Both serve mobile robot drive trains — check the trade-offs; $29.99 vs $54.99
- [goBILDA Yellow Jacket 5202 188:1 Motor](https://www.xirkit.io/products/gobilda-yellow-jacket-5202-188-1-motor-12c9) — Both serve mobile robot drive trains — check the trade-offs; $29.99 vs $39.99
- [Pololu 50:1 Micro Gearmotor HPCB 12V](https://www.xirkit.io/products/pololu-50-1-micro-gearmotor-hpcb-12v-3a12) — Both serve mobile robot drive trains — check the trade-offs; $29.99 vs $26.45
- [goBILDA Yellow Jacket 71.2:1 Gearmotor](https://www.xirkit.io/products/gobilda-yellow-jacket-71-2-1-gearmotor-698e) — Both serve mobile robot drive trains — check the trade-offs; $29.99 vs $54.99
- [goBILDA Yellow Jacket 13.7:1 Gearmotor](https://www.xirkit.io/products/gobilda-yellow-jacket-13-7-1-gearmotor-94ee) — Both serve mobile robot drive trains — check the trade-offs; $29.99 vs $54.99
- [goBILDA Spur Gearmotor 5201-0002-0026](https://www.xirkit.io/products/gobilda-spur-gearmotor-5201-0002-0026-a4f7) — Both serve mobile robot drive trains — check the trade-offs; $29.99 vs $24.99
- [goBILDA Yellow Jacket 5204-8002-0188](https://www.xirkit.io/products/gobilda-yellow-jacket-5204-8002-0188-a8c4) — Both serve mobile robot drive trains — check the trade-offs; $29.99 vs $56.99
- [Pololu 298:1 Micro Metal Gearmotor HP 6V](https://www.xirkit.io/products/pololu-298-1-micro-metal-gearmotor-hp-6v-d4b1) — Both serve mobile robot drive trains — check the trade-offs; $29.99 vs $23.95