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What are the mounting options for a 120MM Brushless Motor?

Dec 31, 2025

Tom Green
Tom Green
Tom is a senior researcher at Duowei Electric, focusing on the development of sustainable materials for electrical applications. His work contributes to the company's commitment to avoiding conflict minerals.

As a seasoned supplier of 120MM Brushless Motor, I've witnessed firsthand the burgeoning demand for reliable and high - performance brushless motors. Among the various sizes available, the 120MM brushless motor stands out for its versatility and power, making it a popular choice across multiple industries. One of the key aspects that users often inquire about is the mounting options for these motors. In this blog, I'll delve into the different mounting methods for a 120MM brushless motor, exploring their advantages, applications, and considerations.

Flange Mounting

Flange mounting is one of the most common and straightforward methods for installing a 120MM brushless motor. A flange is a flat, circular or square plate that extends from the motor housing. It typically has several holes drilled around its perimeter, which are used to bolt the motor to a surface.

The main advantage of flange mounting is its stability. The large surface area of the flange distributes the motor's weight and the forces generated during operation evenly across the mounting surface. This reduces the risk of vibration and ensures that the motor remains firmly in place, even under heavy loads.

Flange - mounted 120MM brushless motors are widely used in industrial machinery, such as conveyor systems and packaging equipment. In conveyor systems, the motor needs to provide a consistent and reliable power source to move materials along the belt. The stable mounting provided by the flange helps to maintain the motor's alignment and prevent any misalignment that could cause premature wear and tear.

When choosing a flange - mounted motor, it's important to consider the size and type of the flange. Different motors may have different flange dimensions and hole patterns. Make sure to match the motor's flange to the mounting surface to ensure a proper fit. Additionally, the material of the flange can also affect its durability and performance. Stainless steel flanges are often preferred in harsh environments due to their corrosion resistance.

Foot Mounting

Foot mounting involves using the motor's feet, which are small protrusions at the bottom of the motor housing, to attach the motor to a base or a frame. The feet usually have holes that allow for easy bolting.

One of the advantages of foot mounting is its simplicity. It's relatively easy to install a foot - mounted motor, as it doesn't require any additional brackets or complex mounting arrangements. This makes it a cost - effective option for many applications.

Foot - mounted 120MM brushless motors are commonly found in small - to - medium - sized industrial equipment, such as fans and pumps. In a fan application, the motor needs to be securely mounted to ensure efficient airflow. The foot mounting provides a stable base for the motor while allowing for easy access for maintenance and repairs.

However, foot - mounted motors may be more susceptible to vibration compared to flange - mounted motors. To mitigate this issue, vibration - absorbing pads can be used between the motor feet and the mounting surface. These pads help to reduce the transmission of vibration and noise, improving the overall performance of the motor.

Face Mounting

Face mounting refers to the process of mounting the motor directly to a surface using the front face of the motor housing. This method is often used when space is limited, as it allows for a more compact installation.

The main advantage of face mounting is its space - saving design. In applications where there is not enough room for a flange or foot mounting, such as in some compact robotic systems, face mounting can be the ideal solution. The motor can be mounted flush against a surface, minimizing the overall footprint.

Face - mounted 120MM brushless motors are also used in some precision machinery, where precise alignment is crucial. For example, in a pick - and - place robot, the motor needs to be accurately positioned to ensure accurate movement of the robotic arm. Face mounting allows for precise alignment and reduces the chances of misalignment during operation.

However, face mounting requires careful consideration of the mounting surface's flatness and stability. Any irregularities in the mounting surface can cause stress on the motor housing and affect its performance. It's also important to ensure that the mounting bolts are tightened evenly to avoid any distortion of the motor housing.

Shaft Mounting

Shaft mounting is a unique mounting option where the motor is mounted directly on a rotating shaft. This method is often used in applications where the motor needs to be integrated with a specific mechanical system.

The advantage of shaft mounting is its direct coupling between the motor and the load. This eliminates the need for additional transmission components, such as belts or gears, which can reduce energy losses and improve the overall efficiency of the system.

Shaft - mounted 120MM brushless motors are commonly used in some high - precision applications, such as in medical equipment and optical instruments. In a medical centrifuge, for example, the motor needs to be directly coupled to the centrifuge rotor to ensure precise rotation speed and balance.

High Performance BLDC Motor120MM Brushless Motor

When using shaft mounting, it's important to ensure proper alignment between the motor shaft and the load shaft. Any misalignment can cause excessive vibration and premature wear of the bearings. Additionally, the shaft - mounted motor needs to be properly secured to prevent it from slipping or moving during operation.

Considerations When Choosing a Mounting Option

When selecting the appropriate mounting option for a 120MM brushless motor, several factors should be taken into account.

  1. Application Requirements: Different applications have different requirements in terms of stability, space, and precision. For example, an industrial machine that operates under heavy loads may require a more stable mounting method like flange mounting, while a compact consumer product may benefit from a space - saving face mounting option.
  2. Mounting Surface: The nature of the mounting surface, such as its flatness, strength, and material, will also influence the choice of mounting option. A rough or uneven surface may not be suitable for face mounting, while a weak surface may require additional reinforcement for heavier motors.
  3. Vibration and Noise: Vibration can cause damage to the motor and other components in the system, as well as generate noise. Consider using vibration - absorbing materials or mounting options that reduce vibration, especially in applications where a quiet environment is required.
  4. Maintenance and Accessibility: The ease of maintenance and accessibility to the motor should also be considered. Some mounting options may make it more difficult to access the motor for inspection, repair, or replacement of parts.

At our company, we offer a wide range of 120MM Brushless Motor options, including 48V 300W Brushless DC Motor and High Performance BLDC Motor. Our motors are designed with high - quality materials and advanced manufacturing techniques to ensure reliable performance and long service life. Whether you need a motor for industrial, commercial, or consumer applications, we can provide you with the right solution.

If you're interested in learning more about our 120MM brushless motors or have specific requirements for your project, we encourage you to contact us for procurement discussions. Our team of experts is ready to assist you in choosing the most suitable motor and mounting option for your needs.

References

  • Electric Motor Handbook, Second Edition by Arnold T. Asquith
  • Brushless DC Motors and Electric Vehicles by Dr. S.K. Pillai

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