How to Choose a Suitable Brushed DC Motor
Selecting the right brushed DC motor comes down to matching the motor’s performance to your application’s load, power, and environment. A clear understanding of a few key factors ensures reliable operation and long service life.

Load Requirements
Start with the basics: torque and speed.
• Torque determines the motor’s ability to move or lift a load
• Speed (RPM) defines how fast the motion occurs
These two are interconnected—higher torque usually results in lower speed. For applications like tilt/trim systems, high torque is the priority.

Voltage and Current
Choose a motor that matches your system voltage (commonly 12V or 24V DC).
• Low voltage → weak performance
• High voltage → overheating and damage
Also check rated and stall current to ensure your wiring, relays, and power source can handle the load.

Duty Cycle
Consider how the motor will operate:
• Intermittent duty: Short bursts (ideal for tilt/trim)
• Continuous duty: Requires better cooling and efficiency
Using the correct duty type avoids unnecessary cost and overheating.

Thermal Performance
Heat is a major cause of motor failure. Look for:
• Thermal protection
• High insulation class (Class F or H)

Build Quality
Durability is especially important in harsh environments:
• Sealed or waterproof housing
• Corrosion-resistant materials
• High-quality brushes and commutator

Fit and Compatibility
Ensure the motor physically and electrically fits your system:
• Shaft size and mounting pattern
• Correct rotation (CW/CCW)
• Compatible connectors and controls

Reliability
Choose trusted manufacturers or OEM-equivalent options with consistent quality, warranty, and availability.

Conclusion
A suitable brushed DC motor is one that meets torque and voltage requirements first, then matches current capacity, duty cycle, and environmental conditions. Proper selection ensures efficient performance, prevents failures, and extends motor life.