Motor DC 4mm Shaft 8520 Motor Model Aircraft Micro Coreless 3.7V

The 8520 Hollow Cup Motor with a 1.0mm shaft is a high-speed, coreless motor designed for small drone projects and quadcopters. It delivers impressive RPM performance in a lightweight and compact form factor, making it ideal for applications where size and weight matter.

Package Includes:

1 x 8520 Motor (1.0mm Shaft)

19.95 AED (Tax included)

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Features

High-speed coreless motor for rapid response and minimal cogging
Compact size for easy integration into drones and small vehicles
Lightweight construction to reduce payload and enhance flight efficiency
Ideal for micro quadcopters, drones, and small UAV projects

Specifications

Voltage: 3.7V
Output shaft diameter: 1.0mm
Cable length: Approximately 45mm
Motor Type: Coreless DC motor
High RPM suitable for micro drone propellers
Lightweight: Minimal contribution to payload

Principle of Work

The 8520 motor operates as a coreless DC motor. Unlike traditional iron-core motors, the rotor has no iron, reducing inertia and allowing rapid acceleration and deceleration. When voltage is applied, the motor’s rotor spins at high speed, producing torque sufficient to drive small propellers. The motor's speed can be precisely controlled using PWM signals from a motor controller, enabling smooth and stable drone flight.

Applications

Micro drones and quadcopters
Mini UAV projects
Educational robotics and aerial vehicle prototypes
High-speed lightweight mechanical projects

Arduino Integration Example (2-Pin Motor)

The 8520 Hollow Cup Motor is a simple 2-pin DC motor. It can be controlled using an H-bridge motor driver (such as L298N, L293D, or a MOSFET driver) connected to an Arduino. One pin connects to the positive supply and the other to the motor driver output. PWM signals can be used to control the motor speed, while switching the pins allows changing the rotation direction.

L293D | Technology Tutorials


// Example Arduino code to control 2-pin DC motor using L298N

int motorPin1 = 3; // Motor driver input 1
int motorPin2 = 4; // Motor driver input 2
int speedPin  = 5; // PWM pin for speed control

void setup() {
  pinMode(motorPin1, OUTPUT);
  pinMode(motorPin2, OUTPUT);
  pinMode(speedPin, OUTPUT);
}

void loop() {
  // Rotate motor forward
  digitalWrite(motorPin1, HIGH);
  digitalWrite(motorPin2, LOW);
  analogWrite(speedPin, 200); // Speed 0-255
  delay(2000);

  // Stop motor
  digitalWrite(motorPin1, LOW);
  digitalWrite(motorPin2, LOW);
  delay(1000);

  // Rotate motor backward
  digitalWrite(motorPin1, LOW);
  digitalWrite(motorPin2, HIGH);
  analogWrite(speedPin, 200);
  delay(2000);

  // Stop motor
  digitalWrite(motorPin1, LOW);
  digitalWrite(motorPin2, LOW);
  delay(1000);
}

This code allows the motor to rotate forward, stop, rotate backward, and stop in a continuous loop. Adjust the value analogWrite (speedPin, value) to change the speed of the motor (0 = stop, 255 = full speed). Ensure your motor driver can handle the current drawn by the 8520 motor.

Additional Notes

Ensure the motor is used within its specified voltage range (3.7V) for optimal performance and longevity. Overvoltage or excessive load may damage the motor. Using a proper ESC with current limiting will protect both the motor and controller. The hollow cup coreless design allows high RPM operation with minimal vibration and excellent flight stability for small drones.