BLDC MotorKinmore KBL3657 brushless DC motor · Ø36 mm

KBL3657H-03A

Name: KBL3657H-03A
Brand: Kinmore

18.5 W, 18 V Ø36 mm BLDC motor from Kinmore: 0.0416 N·m rated at 4271 rpm.

Manufacturer datasheet: Kinmore · KBL3657H-03A ↗ (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: torque constant (fitted to the rated point), resistance (fitted to the rated point), inductance, rotor inertia, weight, insulation class, IP rating.

Applications:Home Appliances Power Tools Fans & Pumps

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How this motor is made

Full manufacturing overview: 57 mm Inner-rotor BLDC Motor →

Ø36 mm frame; built with the same process as the 57 mm inner-rotor reference series.

Assembly steps: 11
Equipment types: 14
BOM lines: 13
PRD suppliers: 88

1. Lamination stamping & interlocking
2. Stator insulation
3. Winding
4. Terminal connection
5. Stator in-process test
6. Impregnation & curing
7. Rotor assembly
8. Magnetizing
9. Rotor balancing
10. Final assembly
11. End-of-line test

Export certification: Low-voltage motor without electronics

Rated power: 18.6 W
Rated torque: 0.0416 N·m
Rated speed: 4,271 rpm
Rated efficiency: 79.5 %

Performance curves

Right axis:

SpeedEfficiency (right axis)

Calculated with the linear DC-motor model (constant 18 V supply, ignoring resistance rise with temperature).

Full specifications

General

Motor type: BLDC Motor
Series: Kinmore KBL3657 brushless DC motor
Frame / flange: Ø36 mm

Rated Values

Rated voltage: 18 V
Rated power: 18.6 W
Rated torque: 0.0416 N·m
Rated speed: 4,271 rpm
Rated current: 1.3 A

Performance

Stall torque: 1.48 N·m
No-load speed: 4,395 rpm
Rated efficiency: 79.5 %
Peak efficiency: 85.1 %

Electrical

Torque constant Kt: 0.0389 N·m/A
Back-EMF constant Ke: 4.07 V/krpm
Resistance: 0.47 Ω
Inductance: 0.705 mH
No-load current: 0.23 A
Stall current: 38.3 A
Electrical time constant: 1.5 ms
Mechanical time constant: 0.467 ms

Mechanical

Rotor inertia: 15 g·cm²
Body length: 57 mm
Shaft diameter: 3.17 mm
Weight: 0.27 kg
Power density: 68.9 W/kg
Insulation class: B
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
APS-06D48-RALTE	TechServo	BLDC, Servo, DC	18–48 V DC	6 A / 18 A	Incremental encoder, Hall sensors, Sensorless
ZM-BL4810F	Zeming	BLDC	18–50 V DC	10 A	Hall sensors, Sensorless
ZM-BL48D10	Zeming	BLDC	18–50 V DC	10 A	Hall sensors, Sensorless
ZM-BL4810K	Zeming	BLDC	18–50 V DC	10 A	Hall sensors, Sensorless
DBL-10RS	Mayi Motor	BLDC	12–60 V DC	10 A	Hall sensors
NU-BL3610-01	Nuelectronics	BLDC	12–36 V DC	10 A / 15 A	Hall sensors, Sensorless, Open loop, Closed loop