Surpass Hobby BAT S4214 400KV/660KV Brushless FPV Motor for Multirotor Drones, M6 Shaft, 12N14P
Surpass Hobby BAT S4214 400KV/660KV Brushless FPV Motor for Multirotor Drones, M6 Shaft, 12N14P
Surpass Hobby
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Overview
Surpass Hobby BAT S4214 is a brushless FPV motor for multirotor/FPV aircraft builds. It is available in 400KV and 660KV versions and uses an M6 threaded shaft for prop installation.
Key Features
- M6 shaft fits most propellers; custom nuts help protect steel shaft threads
- Detachable design for easier cleaning; front cover airflow structure helps improve heat dissipation
- 48SH rotor with NdFeB magnet tiles
- Lightweight, high-strength hole-core steel shaft
- NMB bearings (Japan), smooth and wear-resistant
- 220C high-temperature resistant multi-strand copper wire
- 0.2 mm silicon steel sheet (Japan) for low heat generation and high efficiency
Specifications
| Model | S4214 |
| KV options | 400KV / 660KV |
| Slot/Poles | 12N14P |
| Motor size | Dia 50.4 x 60.5 mm |
| Stator size | Dia 42 x 14 mm |
| Shaft | Dia 6 mm, M6 (CW) |
| Mounting | 4 x M4, Dia 30 mm bolt circle |
| Wire | 14#; 670 mm |
Electrical (by KV)
| Parameter | 400KV | 660KV |
|---|---|---|
| Max watts | 2393.3 W | 2138.8 W |
| Max current | 57.16 A | 86.07 A |
| No-load current | 0.7 A | 1.5 A |
| Resistance | 60.2 m | 30.9 m |
| Weight (including wire) | 255.8 g | 257.0 g |
Thrust Test Data (GF1270-3 Prop)
| Parameter (100% throttle) | S4214 400KV | S4214 660KV |
|---|---|---|
| RPM | 12470 | 11727 |
| Volts | 41.87 V | 24.85 V |
| Amps | 57.16 A | 86.07 A |
| Watts | 2393.3 W | 2138.8 W |
| Torque | 1.387 N.m | 1.230 N.m |
| Thrust | 7011 g | 6219 g |
| Efficiency | 3.9 g/W | 4.1 g/W |
| Motor efficiency | 75.7% | 70.6% |
| Operating temperature | 35.3C | 34.6C |
Options
- KV: 400KV or 660KV
- Quantity: 1PCS or 4PCS
For help choosing the right KV option for a specific prop and power setup, contact [email protected] or visit https://rcdrone.top/.
Details
High-efficiency BAT S4214 motor for multirotor and FPV builds, offered in 400KV or 660KV.
The M6 threaded shaft fits common propellers, while the custom nut helps protect the steel threads during installs.
A 48SH rotor with NdFeB magnet tiles pairs with a lightweight, high-strength hole-core steel shaft for dependable output.
Quality internals—including NMB bearings, high-temperature copper winding, and silicon steel—support smooth running and efficiency.
The detachable design makes cleaning easier, and the front-cover airflow structure helps move heat away during long flights.
Full size, mounting, and thrust-test reference for planning prop, battery, and frame compatibility.
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