SERVO MOTOR-MG90S

Description

🤖 MG90S Metal Gear Servo Motor – High-Torque Micro Servo for Heavy-Duty Applications

The MG90S Metal Gear Servo Motor is a premium upgrade to the standard SG90, featuring durable metal gears for enhanced torque and longevity. This analog micro servo delivers 25% more torque than plastic gear versions while maintaining the same compact form factor, making it ideal for demanding robotics, RC vehicles, and automation projects that require reliable, continuous operation. With metal gears, improved durability, and precise angular control, the MG90S is the professional choice for serious makers and engineers.

✨ Key Highlights

⚙️ Metal Gears – Steel/brass gears for superior durability and longevity
💪 Higher Torque – 2.2kg·cm @ 4.8V (25% more than SG90)
🔄 180° Rotation – Precise angular positioning from 0° to 180°
⚡ 4.8V – 6V Operation – Standard servo voltage range
🏗️ Heavy-Duty Construction – Built for continuous, high-stress operation
📐 Compact Size – Same footprint as SG90: 22.8mm x 12.2mm x 28.5mm
📱 Arduino Compatible – Works with Servo library out-of-the-box
🔧 Complete Accessories – Mounting hardware and metal servo horns included
⚖️ Moderate Weight – 13.4g (heavier than SG90 but stronger)
🎯 Superior Precision – Better accuracy and holding power

📊 Technical Specifications

Specification	Details
🏷️ Model Number	MG90S (Tower Pro or equivalent)
🔧 Servo Type	Analog Metal Gear Micro Servo
⚡ Operating Voltage	4.8V – 6V DC
🔋 Recommended Voltage	5V DC (standard) / 6V DC (maximum torque)
💡 No-Load Current	~170mA @ 4.8V / ~220mA @ 6V
⚙️ Stall Current (Max)	~820mA @ 4.8V / ~900mA @ 6V
💪 Torque @ 4.8V	2.2kg·cm (30.5oz·in)
💪 Torque @ 6V	2.5kg·cm (34.7oz·in)
🔄 Rotation Range	0° to 180° (approximately)
⏱️ Speed @ 4.8V	0.11 sec/60° (no load)
⏱️ Speed @ 6V	0.09 sec/60° (no load)
📡 Control Signal	PWM (Pulse Width Modulation)
🔊 PWM Frequency	50Hz (20ms period)
📏 Pulse Width Range	1ms (0°) to 2ms (180°), 1.5ms (90° center)
🎯 Neutral Position	1.5ms pulse width (90°)
🔌 Connector Type	Standard 3-pin servo connector (female)
📏 Wire Length	~250mm (25cm)
⚙️ Gear Type	Metal gears (Steel/Brass alloy)
🏗️ Gear Durability	High – resistant to stripping under load
🔩 Output Shaft	Spline shaft (standard servo horn compatible)
🌡️ Operating Temperature	0°C to +60°C
📐 Dimensions (L x W x H)	22.8mm x 12.2mm x 28.5mm (including mounting tabs)
⚖️ Weight	~13.4g (0.47oz)
🔧 Mounting Holes	2x mounting tabs with holes
🔩 Mounting Screw Size	M2 screws (included)
🔄 Bearing Type	Double ball bearing (smoother operation)

🔌 Wire Color & Pin Configuration

Wire Color	Function	Connection
Brown (or Black)	Ground (GND)	Connect to power supply ground / Arduino GND
Red	Power (VCC)	Connect to +5V or +6V (4.8V-6V) power supply
Orange (or Yellow/White)	Control Signal (PWM)	Connect to MCU PWM pin (Arduino D9, D10, etc.)

📏 PWM Pulse Width to Angle Mapping

Angle Position	Pulse Width	Duty Cycle @ 50Hz
0° (Minimum)	1.0ms (1000µs)	~5%
45°	1.25ms (1250µs)	~6.25%
90° (Center)	1.5ms (1500µs)	~7.5%
135°	1.75ms (1750µs)	~8.75%
180° (Maximum)	2.0ms (2000µs)	~10%

🎯 Perfect For

Application	Description
🤖 Heavy-Duty Robot Arms	Multi-DOF arms handling heavier payloads, industrial prototypes
🚗 RC Cars & Trucks	Steering for larger RC vehicles, off-road applications
✈️ RC Aircraft	Control surfaces for larger planes, gliders, drones
🚁 Drone Gimbals	Camera stabilization, FPV systems, professional gimbals
🏗️ Construction Robots	Walking robots, hexapods, quadrupeds with load-bearing joints
🎭 Professional Animatronics	Theatrical props, museum exhibits, realistic movements
🔬 Lab Automation	Precise positioning systems, sample handling, optical equipment
🏭 Industrial Prototypes	Factory automation mockups, conveyor systems, sorting mechanisms
📡 Antenna Positioning	Medium-duty antenna rotators, satellite tracking
🎮 Motion Simulators	Flight simulators, racing rigs, VR motion platforms
🚪 Automated Mechanisms	Door locks, valve control, industrial dampers
🎨 Kinetic Art	Moving sculptures, interactive installations, museums

📦 Package Contents

✅ 1x MG90S Metal Gear Micro Servo Motor
✅ 4x Servo Horns (various shapes: single arm, cross, double arm, star)
✅ 4x Mounting Screws (M2 for servo horns)
✅ 2x Mounting Brackets/Tabs (if separate)
✅ 25cm 3-wire cable with connector
⚠️ Note: Some horns may be metal (stronger than SG90 plastic)
⚠️ Note: Power supply NOT included (5V-6V recommended)
⚠️ Note: Servo extension cables sold separately

💻 Arduino Code Examples

Basic Servo Control with Load

Code Snippet

Code Snippet
`#include <Servo.h> Servo myServo; // Create servo object void setup() { myServo.attach(9); // Attach servo to pin 9 Serial.begin(9600); Serial.println("MG90S Metal Gear Servo Test"); // Move to center position myServo.write(90); delay(1000); }` void loop() { // Slow, controlled movement for heavy loads Serial.println("Moving to 0°"); for (int angle = 90; angle >= 0; angle--) { myServo.write(angle); delay(20); // Slower for heavier loads } delay(500); Serial.println("Moving to 180°"); for (int angle = 0; angle <= 180; angle++) { myServo.write(angle); delay(20); } delay(500); // Return to center Serial.println("Returning to 90°"); myServo.write(90); delay(2000); }



#include <Servo.h>
Servo myServo; // Create servo object
void setup() {

  myServo.attach(9); // Attach servo to pin 9

  Serial.begin(9600);

  Serial.println("MG90S Metal Gear Servo Test");

  

  // Move to center position

  myServo.write(90);

  delay(1000);

}

void loop() { // Slow, controlled movement for heavy loads Serial.println("Moving to 0°"); for (int angle = 90; angle >= 0; angle--) { myServo.write(angle); delay(20); // Slower for heavier loads } delay(500); Serial.println("Moving to 180°"); for (int angle = 0; angle <= 180; angle++) { myServo.write(angle); delay(20); } delay(500); // Return to center Serial.println("Returning to 90°"); myServo.write(90); delay(2000); }

Robot Arm with MG90S Servos

Code Snippet

Code Snippet
#include <Servo.h> Servo base, shoulder, elbow, gripper; void setup() { base.attach(9); // Base rotation (heavy load) shoulder.attach(10); // Shoulder joint (heavy load) elbow.attach(11); // Elbow joint (medium load) gripper.attach(12); // Gripper (light load) // Initialize to safe position moveToPosition(90, 90, 90, 30); // All servos to neutral delay(2000); } void moveToPosition(int b, int s, int e, int g) { // Smooth simultaneous movement int currentBase = base.read(); int currentShoulder = shoulder.read(); int currentElbow = elbow.read(); int currentGripper = gripper.read(); // Move incrementally int steps = 50; // Number of steps for smooth motion for (int i = 0; i <= steps; i++) { base.write(map(i, 0, steps, currentBase, b)); shoulder.write(map(i, 0, steps, currentShoulder, s)); elbow.write(map(i, 0, steps, currentElbow, e)); gripper.write(map(i, 0, steps, currentGripper, g)); delay(20); } } `void loop() { // Pick sequence moveToPosition(45, 60, 120, 30); // Open gripper, reach delay(500); moveToPosition(45, 60, 120, 90); // Close gripper delay(500); // Place sequence moveToPosition(135, 90, 90, 90); // Move to place position delay(500); moveToPosition(135, 90, 90, 30); // Open gripper delay(500); // Return home moveToPosition(90, 90, 90, 30); delay(2000); }`



#include <Servo.h>
Servo base, shoulder, elbow, gripper;
void setup() {

  base.attach(9);     // Base rotation (heavy load)

  shoulder.attach(10); // Shoulder joint (heavy load)

  elbow.attach(11);    // Elbow joint (medium load)

  gripper.attach(12);  // Gripper (light load)

  

  // Initialize to safe position

  moveToPosition(90, 90, 90, 30); // All servos to neutral

  delay(2000);

}
void moveToPosition(int b, int s, int e, int g) {

  // Smooth simultaneous movement

  int currentBase = base.read();

  int currentShoulder = shoulder.read();

  int currentElbow = elbow.read();

  int currentGripper = gripper.read();

  

  // Move incrementally

  int steps = 50; // Number of steps for smooth motion

  for (int i = 0; i <= steps; i++) {

    base.write(map(i, 0, steps, currentBase, b));

    shoulder.write(map(i, 0, steps, currentShoulder, s));

    elbow.write(map(i, 0, steps, currentElbow, e));

    gripper.write(map(i, 0, steps, currentGripper, g));

    delay(20);

  }

}

void loop() { // Pick sequence moveToPosition(45, 60, 120, 30); // Open gripper, reach delay(500); moveToPosition(45, 60, 120, 90); // Close gripper delay(500); // Place sequence moveToPosition(135, 90, 90, 90); // Move to place position delay(500); moveToPosition(135, 90, 90, 30); // Open gripper delay(500); // Return home moveToPosition(90, 90, 90, 30); delay(2000); }

Load Detection (Current Monitoring)

Code Snippet

Code Snippet
`#include <Servo.h> Servo myServo; const int CURRENT_SENSE_PIN = A0; // ACS712 current sensor const int SERVO_PIN = 9; void setup() { myServo.attach(SERVO_PIN); Serial.begin(9600); } float readCurrent() { // Read current from ACS712 sensor int sensorValue = analogRead(CURRENT_SENSE_PIN); float voltage = sensorValue * (5.0 / 1023.0); float current = (voltage - 2.5) / 0.185; // For ACS712-5A return abs(current); }` void loop() { // Move servo and monitor current for (int angle = 0; angle <= 180; angle += 10) { myServo.write(angle); delay(100); // Wait for position float current = readCurrent(); Serial.print("Angle: "); Serial.print(angle); Serial.print("° \| Current: "); Serial.print(current); Serial.println("mA"); // Detect overload (stalling) if (current > 700) { // Threshold for MG90S Serial.println("WARNING: Overload detected!"); myServo.detach(); // Release servo delay(1000); myServo.attach(SERVO_PIN); } } delay(2000); }



#include <Servo.h>
Servo myServo;

const int CURRENT_SENSE_PIN = A0; // ACS712 current sensor

const int SERVO_PIN = 9;
void setup() {

  myServo.attach(SERVO_PIN);

  Serial.begin(9600);

}
float readCurrent() {

  // Read current from ACS712 sensor

  int sensorValue = analogRead(CURRENT_SENSE_PIN);

  float voltage = sensorValue * (5.0 / 1023.0);

  float current = (voltage - 2.5) / 0.185; // For ACS712-5A

  return abs(current);

}

void loop() { // Move servo and monitor current for (int angle = 0; angle <= 180; angle += 10) { myServo.write(angle); delay(100); // Wait for position float current = readCurrent(); Serial.print("Angle: "); Serial.print(angle); Serial.print("° | Current: "); Serial.print(current); Serial.println("mA"); // Detect overload (stalling) if (current > 700) { // Threshold for MG90S Serial.println("WARNING: Overload detected!"); myServo.detach(); // Release servo delay(1000); myServo.attach(SERVO_PIN); } } delay(2000); }

✅ Advantages of MG90S vs SG90

Feature	MG90S Advantage	Improvement Over SG90
⚙️ Gear Material	Metal (Steel/Brass alloy)	❌ SG90: Plastic gears prone to stripping
💪 Torque @ 4.8V	2.2kg·cm	📈 +22% more torque (SG90: 1.8kg·cm)
💪 Torque @ 6V	2.5kg·cm	📈 +14% more torque (SG90: 2.2kg·cm)
🏗️ Durability	Excellent – handles shock loads	⚠️ SG90: Gears can strip under stress
🔄 Lifespan	Much longer operational life	📈 2-3x longer than plastic gears
⚡ Continuous Operation	Suitable for 24/7 use	⚠️ SG90: Limited duty cycle
🎯 Precision Hold	Better holding power under load	📈 Reduced position drift
🔊 Noise Level	Slightly noisier (metal gears)	⚠️ Trade-off for durability
⚖️ Weight	13.4g (heavier)	📈 +49% heavier (SG90: 9g)
💰 Price	2-3x more expensive	💰 Worth it for demanding applications

⚠️ Important Usage Notes & Best Practices

⚡ Dedicated power supply essential – Use external 5V-6V PSU (2A minimum), NEVER Arduino 5V pin
🔌 Common ground critical – Servo GND and Arduino GND must connect
💪 Higher torque = higher current – Stall current up to 900mA, ensure adequate PSU
⚙️ Metal gears still have limits – Don’t exceed 2.5kg·cm torque rating
🔊 Noisier than SG90 – Metal gears produce more audible buzz
🌡️ Heat generation – Can get warm under continuous heavy load
🎯 Better precision – Less backlash than plastic gears, tighter positioning
⏱️ Slightly faster – 0.11s/60° vs 0.12s/60° (SG90)
🔋 6V operation – Running at 6V gives maximum torque but shortens lifespan
⚖️ Weight consideration – 13.4g may affect flying drones/lightweight robots
📏 Same mounting footprint – Direct replacement for SG90 in existing projects
🛡️ Use for heavy loads – Ideal when SG90 gears would strip

🔋 Power Supply Requirements

Number of Servos	Voltage	Minimum Current	Recommended PSU
1 Servo	5V	1A	2A @ 5V (USB charger)
2-3 Servos	5V	2A	3A @ 5V (wall adapter)
4-6 Servos	5V	3A	5A @ 5V regulated PSU
7+ Servos	5V	5A+	10A @ 5V switching PSU
High Performance	6V	+20% current	6V regulated PSU (higher torque mode)
⚠️ Critical: MG90S draws MORE current than SG90 – use higher capacity PSU

🔍 Troubleshooting Guide

Problem	Possible Cause	Solution
Servo Doesn’t Move	Insufficient power or wrong wiring	✅ Use external 2A+ PSU, verify red to +5V, brown to GND
Servo Jitters Under Load	Power supply can’t handle current spikes	✅ Upgrade to 3A+ PSU, add 470µF-1000µF capacitor across power
Arduino Resets When Servo Moves	Powering servo from Arduino 5V	✅ CRITICAL: Use separate PSU, connect grounds only
Servo Gets Very Hot	Stalling against obstacle or overload	✅ Remove obstruction, reduce load, check for binding
Grinding Noise	Metal gears misaligned or damaged	✅ Check for internal damage, may need replacement
Inconsistent Speed	Voltage fluctuation or weak battery	✅ Use regulated PSU, check voltage under load with multimeter
Limited Range of Motion	Mechanical binding or calibration	✅ Remove horn, check for obstructions, recalibrate limits in code
Buzzing When Holding Position	Normal operation (trying to maintain position)	✅ Add capacitor, use detach() when not actively controlling

💡 Pro Tips for MG90S Usage

🔋 Voltage selection – Use 5V for longevity, 6V for maximum torque (shorter life)
📏 Large capacitor essential – 1000µF across power rails reduces jitter significantly
⚙️ Break-in period – Run servos through full range 20-30 times before heavy use
🔧 Gradual movements – Incremental angle changes reduce mechanical stress
💾 Current limiting – Monitor current draw, implement soft limits in code
⏱️ Duty cycle management – Give servos rest periods during continuous operation
🛡️ Shock absorption – Use rubber dampers for impact-prone applications
🔄 Gear lubrication – Metal gears benefit from light machine oil (sparingly)
📊 Load testing – Test with actual payload before deployment
🎯 Calibration – Individual servos may need fine-tuning (±5° adjustment)
🌡️ Thermal management – Add heatsinks for continuous heavy-duty use
🔌 Wire gauge – Use 22-24 AWG for servo power, shorter runs better

🆚 Detailed MG90S vs SG90 Comparison

Feature	MG90S (Metal Gear)	SG90 (Plastic Gear)
Torque @ 4.8V	2.2kg·cm	1.8kg·cm
Torque @ 6V	2.5kg·cm	2.2kg·cm
Gear Material	Metal (Steel/Brass)	Plastic (Nylon)
Durability	⭐⭐⭐⭐⭐ Excellent	⭐⭐⭐ Good
Weight	13.4g	9g (-33% lighter)
Speed @ 4.8V	0.11 sec/60°	0.12 sec/60° (slightly slower)
Stall Current	820mA @ 4.8V	650mA @ 4.8V (less)
Noise Level	⭐⭐ Higher (metal gears)	⭐⭐⭐ Quieter
Lifespan	⭐⭐⭐⭐⭐ Very Long	⭐⭐⭐ Moderate
Precision	⭐⭐⭐⭐ Better	⭐⭐⭐ Good
Price	💰💰💰 2-3x more	💰 Very affordable
Best For	Heavy loads, continuous use	Lightweight, budget projects

🎓 Example Heavy-Duty Projects

Project	Why MG90S?	Servos Needed
4-DOF Robot Arm (Heavy)	Handles 200-300g payload	4x MG90S
Large RC Car Steering	Withstands impact/shock loads	1-2x MG90S
Hexapod Walking Robot	Continuous operation, body weight	12-18x MG90S
Professional Camera Gimbal	Holds DSLR weight (500g+)	2-3x MG90S
Automated Door Lock	Reliable, thousands of cycles	1x MG90S
CNC Pen Plotter	Precision + durability	2-3x MG90S

🔧 Metal Gear Maintenance Tips

Maintenance Task	Frequency	Procedure
Visual Inspection	Monthly	Check for loose horns, damaged wires, physical damage
Lubrication	Every 6 months	Apply tiny drop of light machine oil to gear teeth (sparingly)
Horn Screw Check	Monthly	Verify horn mounting screw is tight (don’t overtighten)
Calibration Check	Quarterly	Test 0°, 90°, 180° positions, adjust code if drift detected
Current Draw Test	Quarterly	Measure no-load and stall current, compare to specs
Deep Clean	Yearly	Disassemble, clean gears, re-lubricate (advanced users)

🛡️ Warranty & Support

✅ Premium MG90S metal gear micro servo
✅ 2.2kg·cm torque @ 4.8V (25% more than SG90)
✅ Durable metal gears (Steel/Brass alloy)
✅ Double ball bearing for smooth operation
✅ 180° rotation range with precise positioning
✅ Standard 3-wire interface (brown-red-orange)
✅ Complete accessory kit (4 horns, screws, mounting hardware)
✅ Compatible with Arduino Servo library
✅ Works with 3.3V and 5V logic levels
✅ Compact 22.8×12.2×28.5mm form factor (SG90 compatible)
✅ Pre-tested before shipping
✅ Technical documentation and example code
✅ Fast replacement for defective units
⚠️ Important: CRITICAL – Use external 5V-6V power supply (2A+ minimum) – NEVER power from Arduino 5V pin. Connect common ground between servo and microcontroller. Metal gears are much more durable but slightly noisier than plastic. Stall current up to 900mA @ 6V – ensure adequate power supply. Ideal for heavy-duty applications where SG90 would fail. Not waterproof – protect from moisture.

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Description

🤖 MG90S Metal Gear Servo Motor – High-Torque Micro Servo for Heavy-Duty Applications

✨ Key Highlights

📊 Technical Specifications

🔌 Wire Color & Pin Configuration

📏 PWM Pulse Width to Angle Mapping

🎯 Perfect For

📦 Package Contents

💻 Arduino Code Examples

Basic Servo Control with Load

Robot Arm with MG90S Servos

Load Detection (Current Monitoring)

✅ Advantages of MG90S vs SG90

⚠️ Important Usage Notes & Best Practices

🔋 Power Supply Requirements

🔍 Troubleshooting Guide

💡 Pro Tips for MG90S Usage

🆚 Detailed MG90S vs SG90 Comparison

🎓 Example Heavy-Duty Projects

🔧 Metal Gear Maintenance Tips

🛡️ Warranty & Support

Customer Reviews

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SERVO MOTOR-MG90S

Shipping Policy

Safe Checkout

Description

🤖 MG90S Metal Gear Servo Motor – High-Torque Micro Servo for Heavy-Duty Applications

✨ Key Highlights

📊 Technical Specifications

🔌 Wire Color & Pin Configuration

📏 PWM Pulse Width to Angle Mapping

🎯 Perfect For

📦 Package Contents

💻 Arduino Code Examples

Basic Servo Control with Load

Robot Arm with MG90S Servos

Load Detection (Current Monitoring)

✅ Advantages of MG90S vs SG90

⚠️ Important Usage Notes & Best Practices

🔋 Power Supply Requirements

🔍 Troubleshooting Guide

💡 Pro Tips for MG90S Usage

🆚 Detailed MG90S vs SG90 Comparison

🎓 Example Heavy-Duty Projects

🔧 Metal Gear Maintenance Tips

🛡️ Warranty & Support

Customer Reviews

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