When building a robotics project, choosing the right motor is one of the most important decisions you’ll make. Two of the most common motor types used in robotics are brushed DC motors and brushless DC motors (BLDC motors).

But which one is better for your application?

In this guide, we’ll break down:

• The difference between brushed and brushless motors

• Performance comparison

• Cost comparison

• Efficiency & lifespan

• Which motor type is best for robotics projects

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What Is a Brushed DC Motor?

A brushed DC motor uses carbon brushes and a commutator to transfer electrical current to the rotor. This mechanical contact creates rotation.

Key Features:

• Simple structure

• Low cost

• Easy to control

• Works with basic DC power supply

Advantages:

✔ Affordable
✔ Easy to wire
✔ Great for beginners
✔ No complex driver required

Disadvantages:

✘ Brushes wear out over time
✘ Lower efficiency
✘ More noise
✘ Generates more heat

Best For:

• DIY robots

• Educational kits

• Low-budget robotics projects

• Simple motion systems

Many small gear motors like 25D and 37D planetary gear motors are brushed motors, widely used in small mobile robots and smart car projects.

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What Is a Brushless DC Motor (BLDC)?

A brushless DC motor eliminates brushes and instead uses electronic commutation via a motor driver.

Key Features:

• No physical brush contact

• Controlled by ESC or driver

• Higher efficiency

• Longer lifespan

Advantages:

✔ High efficiency
✔ Longer service life
✔ Low noise
✔ Better speed stability
✔ Higher torque-to-weight ratio

Disadvantages:

✘ Higher cost
✘ Requires motor driver
✘ Slightly more complex setup

Best For:

• Industrial robotics

• AGV systems

• Robotic arms

• Precision motion control

• Continuous operation applications

For example, 57BL brushless planetary motors are commonly used in industrial-grade robotic systems requiring stable 24V operation.

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Brushed vs Brushless Motor Comparison

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Which Motor Is Better for Robotics?

The answer depends on your project type.

Choose Brushed Motor If:

• You are building a hobby robot

• Budget is limited

• You need a simple plug-and-play solution

• Intermittent use

Choose Brushless Motor If:

• Your robot runs continuously

• You need higher efficiency

• You require precise speed control

• It’s an industrial or commercial project

• 24V power system is used

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What About Gear Motors?

Most robotics applications require gear motors rather than high-speed direct motors.

Why?

Because robots need:

• High torque

• Controlled speed

• Stable output

Planetary gear motors are especially popular because they provide:

• High torque density

• Compact structure

• Better load capacity

• Lower backlash

Both brushed and brushless motors can be combined with planetary gearboxes.

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24V Systems: Why Brushless Is More Popular

In 24V robotics platforms (AGV, warehouse robots, industrial automation), brushless motors are often preferred because:

• Better energy efficiency

• Lower maintenance

• Stable long-term performance

• Lower downtime

If you are designing a 24V robotic system, a brushless planetary gear motor is usually the better long-term investment.

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Final Recommendation

There is no “one-size-fits-all” motor.

For beginners → Brushed DC gear motor
For professional robotics → Brushless planetary gear motor
For industrial 24V systems → Brushless motor with encoder

Choosing the correct motor will improve:

• Robot stability

• Power efficiency

• System lifespan

• Overall performance

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Need Help Choosing the Right Motor?

When selecting a motor, consider:

• Voltage (12V or 24V?)

• Required torque

• Required RPM

• Load weight

• Duty cycle

• Control method

• Space constraints

If you’re unsure, always match torque first, then speed, then size.