BLDC MotorT-MOTOR U series · Ø60.7 mm
U7 KV420
420 KV drone motor from T-MOTOR for 3-8S: up to 5060 g thrust with a 18*6.1CF prop.
Manufacturer datasheet: T-MOTOR · U7 KV420 ↗ (checked 2026-10-18)Maker profile & contacts →
Figures are copied from the maker’s published datasheet; curves are calculated from them. Confirm with the manufacturer before ordering. Not stated on the datasheet, estimated from it: rated point (estimated from KV, voltage and maximum current), inductance, rotor inertia, insulation class, IP rating.
Applications:Drones & UAV
How this motor is made
Full manufacturing overview: 70 mm Outer-rotor BLDC Motor →Ø60.7 mm frame; built with the same process as the 70 mm outer-rotor reference series.
- 1. Stator lamination stamping & interlocking
- 2. Stator powder coating
- 3. Outer-stator winding
- 4. Terminal soldering
- 5. Stator in-process test
- 6. Trickle impregnation (optional)
- 7. Stator mounting & Hall board
- 8. Rotor cup assembly
- 9. Magnetizing
- 10. Rotor balancing
- 11. Final assembly
- 12. End-of-line test
Export certification: Low-voltage motor without electronics
- Rated power
- 430 W
- Rated torque
- 0.336 N·m
- Rated speed
- 12,215 rpm
- Rated efficiency
- 92.6 %
Performance curves
Right axis:
SpeedEfficiency (right axis)
Calculated with the linear DC-motor model (constant 29.6 V supply, ignoring resistance rise with temperature).
Full specifications
General
- Motor type
- BLDC Motor
- Series
- T-MOTOR U series
- Frame / flange
- Ø60.7 mm
Rated Values
- Rated voltage
- 29.6 V
- Rated power
- 430 W
- Rated torque
- 0.336 N·m
- Rated speed
- 12,215 rpm
- Rated current
- 15.7 A
Performance
- Stall torque
- 20.4 N·m
- No-load speed
- 12,420 rpm
- Rated efficiency
- 92.6 %
- Peak efficiency
- 93.8 %
Electrical
- Torque constant Kt
- 0.0227 N·m/A
- Back-EMF constant Ke
- 2.38 V/krpm
- Resistance
- 0.033 Ω
- Inductance
- 0.05 mH
- No-load current
- 0.9 A
- Stall current
- 897 A
- Poles
- 14
- Electrical time constant
- 1.52 ms
- Mechanical time constant
- 0.498 ms
Mechanical
- Rotor inertia
- 78 g·cm²
- Body length
- 39.5 mm
- Shaft diameter
- 6 mm
- Weight
- 0.296 kg
- Power density
- 1,452 W/kg
- Protection
- IP40
Compatible drivers
All drivers →Drivers whose supply voltage covers this motor and whose continuous current is at least its rated current; drivers from the same maker first. Confirm Hall/encoder type and settings with the maker.
| Model | Maker | Motor type | Supply | Cont. / peak current | Feedback |
|---|---|---|---|---|---|
| ZM-BL4815F | Zeming | BLDC | 18–50 V DC | 15 A | Hall sensors, Sensorless |
| DBL-15RS | Mayi Motor | BLDC | 18–60 V DC | 15 A | Hall sensors |
| DBL4815RS | Mayi Motor | BLDC | 18–55.2 V DC | 15 A / 50 A | |
| BD15L□□2□ | Stonker Motor | BLDC | 12–60 V DC | 15 A | Sensorless |
| ZLAC8015 | ZLTECH | Servo, BLDC | 24–48 V DC | 15 A / 30 A | Incremental encoder, Hall sensors |
| ZLAC8015D | ZLTECH | Servo, BLDC | 24–48 V DC | 15 A / 30 A | Incremental encoder, Hall sensors |
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896 W · 22.2 V