QS Motor QSD138A-70
QS138 70H V1 Mid Drive Motor — 3000W rated IPM PMSM inrunner for electric motorcycle and e-scooter conversions. Belt driven (default) or sprocket design with 6-5 spline shaft output. 138mm stator diameter, 70mm stack height, 5 pole pairs. Air cooled, IP67 waterproof. Supports regenerative braking. Commonly paired with Fardriver ND72450/ND72530, VOTOL EM150/EM200, or Sabvoton SVMC72150 controllers. Compatible with 428 chain sprocket adapters (10T/11T/13T/14T) or timing belt pulleys.
In brief: 3000W mid-drive motor. 48–72V rated. From $268.
Specs verified Aug 31, 2026
Where to Find
Prices tracked across 3 sellersAliExpress - SIA Tech Store
$268.20 + $185.67 shipping
QS Motor
Request a quoteAliExpress - NB Ebike Factory Store
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Specifications
Motor Design
- Design
- Inrunner PMSM
- Stator Diameter
- 138mm
- Stator Height
- 70mm
- Pole Pairs
- 5
- Shaft Type
- Spline
- Cooling
- Air
Performance
- Wattage
- 3000W
- Peak Wattage
- 10000W
- Rated Voltage
- 48–72V
- Rated RPM
- 3800
- Max Torque
- 55.00Nm
Electrical
- Continuous DC Amps
- 67A
- Peak DC Amps
- 140A
- Flux Weakening RPM
- 6000RPM
Features
- PAS Sensor Type
- None
- Temp Sensor
- KTY83
- Has Encoder
- No
Physical
- Weight
- 11 kg
- Dimensions (L×W×H)
- 210mm × 162mm × 162mm
- IP Rating
- IP67
Ports & Connectors
| Pin | Wire color | Function |
|---|---|---|
| 1 | Yellow | Phase A |
| 2 | Green | Phase B |
| 3 | Blue | Phase C |
| Pin | Wire color | Function |
|---|---|---|
| 1 | Red | 5V Power |
| 2 | No color | None |
| 3 | Black | Ground |
| 4 | Green | Hall A |
| 5 | Yellow | Hall B |
| 6 | Blue | Hall C |
