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How To Safely Make A Coreless Motor

In the intricate realm of engineering, the coreless motor emerges as a notable marvel. Quite contrary to its traditional counterparts, the coreless motor boasts of an absence of an iron core, giving it its unique name. 

Delving into constructing one is both a revelation and a challenge. Think about it: a motor, an integral machine component, devoid of its core. Astonishing, isn’t it? Yet, it’s achievable. 

Let’s move on this exciting journey to decode the art and science behind crafting a coreless motor, keeping our guidance lucid and comprehensible. And while the journey might seem daunting at first, the outcome will undoubtedly resonate with the ingenuity of human invention.

Click to read our article: Comprehensive Guide on Coreless Motors and Its Specifications I hope it will help you

What is a DC Coreless Motor?

A coreless DC motor is a motor that runs on current (DC). It stands out from DC motors because it doesn’t have an iron core in its armature. This unique design contributes to its efficiency and effectiveness.

Coreless Motor

Structure and Operation

A coreless motor consists of two primary components: a coil and a magnet. Typically wound with a thin wire, the coil is positioned on a cylindrical, non-metallic former. Surrounding this coil is a permanent magnet, often made of neodymium, a strong and durable material. The absence of an iron core in the armature sets coreless motors apart from their conventional counterparts.

The operation of a DC coreless motor is relatively straightforward. When a current passes through the coil, a magnetic field is produced. The interaction between this magnetic field and the magnetic field of the surrounding permanent magnet creates a rotational force or torque. This torque drives the motor’s output shaft, enabling it to perform mechanical work.

Steps to Make Simple Coreless Motor

Constructing a basic coreless motor involves several straightforward yet crucial steps. While seemingly simple, these steps are the foundation upon which the motor’s functionality hinges. So, let’s delve into the intricacies of this fascinating process:

Prepare Your Work Surface

Before you embark on this electrifying journey, ensure your work area is organized and free from potential hazards. Safety should be prioritized when engaging in an electrical project.

Gather Your Materials

To execute this task precisely, you will need a small cylindrical tube and a spool of magnet wire. Magnet wire, renowned for its conductivity, is the key to our motor’s operation.

Coil the Magnet Wire

Take that cylindrical tube and carefully wrap it with a thin magnet wire layer. The coiling process requires patience and precision. Ensure the wire is wound uniformly to optimize performance.

Prepare the Wire Leads

Now, grab two small pieces of wire. These wires will serve as the conduits for the electrical current. Remove the insulation from both tips of the wire. This will expose the conductive core, enabling effective electrical contact.

Solder the Connections

With your soldering iron ready, gently solder one end of each wire to the exposed ends of the magnet wire on the cylinder. This soldering step is critical for creating a seamless electrical pathway.

Power Up the Motor

Now, assuming you have meticulously connected the wires to the magnet wire, it’s time to connect the other ends of the wires to a suitable power source or battery. The flow of electricity is the catalyst for the motor’s movement.

Magnetic Precision

Position the cylinder you’ve prepared between two potent magnets. This placement allows a magnetic field to exert force on the coiled wire, setting the stage for the motor’s mesmerizing spin.

Energize and Observe

When you activate the power, there’s an immediate sense of expectation. See the culmination of your efforts: The motor begins to rotate. It’s a simple yet powerful demonstration of the wonders of electromagnetism.

Safety Measures in Motor Making

Creating a coreless motor involves several intricate steps and handling various materials and tools. Ensuring the safety of the individuals involved is paramount. This guide will strictly outline essential safety measures to observe during the motor-making process.

coreless motor

Personal Protective Equipment (PPE)

● Always wear appropriate PPE, including safety goggles, gloves, and a lab coat or apron, to protect against hazards like flying debris, chemicals, or electrical accidents.

Workspace Safety

● Set up your workspace in a clean, well-ventilated area, and keep it organized to prevent tripping hazards.

● Ensure adequate lighting to avoid eye strain and accidents.

Material Handling

● Place all materials and chemicals in specified locations, avoiding heat sources and direct sunlight.

● Use proper containers and labels to make sure everything is clear.

● Handle materials with care to prevent injuries or damage.

Electrical Safety

● If working with electrical components, ensure that all power sources are turned off when making connections or adjustments.

● Ensure electrical cords and connections are distanced from water to prevent electric shock.

● Use insulated tools and equipment when dealing with electricity.

Applications of a Coreless Motor

With their unique design and compact size, Coreless motors find various applications in various industries. These motors, also known for their efficiency and precision, are crucial components in several devices and systems. Let’s explore some key applications of coreless motors, highlighting their significance in modern technology.

Medical Devices

Coreless motors are extensively used in medical devices, where precise control and compact size are critical. They power equipment such as infusion pumps, insulin pumps, and medical robots. The smooth and precise motion provided by coreless motors ensures the accuracy required for delivering medications or performing delicate surgical procedures.


Coreless motors are favored for various applications in the aerospace industry, where weight and size constraints are paramount. They are employed in actuator systems, control surfaces, and satellite positioning systems. Their lightweight design and high power-to-weight ratio make them ideal for space exploration and aviation.

Consumer Electronics

In the realm of consumer electronics, coreless motors stand out as game-changers. Why? Dive into a camera, and you’ll spot them at the heart of the autofocus mechanism. Pick up a gaming controller, and there they are, delivering that tactile vibration feedback.

And for drone enthusiasts? Well, these motors are the unsung heroes behind those agile flights. Their compact footprint, coupled with their powerhouse performance, redefines device efficiency.

coreless motor


What is a coreless motor, and why would I want to make one?

A coreless motor, distinct from its traditional counterparts, lacks an iron core in its armature. This construction results in a lightweight motor with faster response times and decreased cogging.

Why would one opt for a coreless motor?

Choosing a coreless motor presents advantages such as reduced weight, enhanced efficiency, and minimized inertia. Notably, the absence of an iron core diminishes the chances of magnetic saturation.

What are the primary components of a coreless motor?

Fundamental to a coreless motor are:

● A wound copper coil: This creates an electromagnetic field.

● Permanent magnets: These are set around the coil.

● Bearings: They support the rotor.

● A commutator: Essential for current transmission.

How do you begin constructing a coreless motor?

Get the appropriate materials: copper wire, permanent magnets, bearings, and a commutator. Next, designing the motor layout, keeping spatial constraints and application requirements in mind.

What’s the procedure for winding the copper coil?

Initiate by selecting the right gauge of copper wire. Wind this wire onto a temporary form, ensuring it’s tight and evenly layered. Once sufficiently wound, carefully remove the form, preserving the coil’s shape.

Click to read our article Comparison Guide Between Coreless Motors and Brushless Motors.


Constructing a motor requires a delicate balance: an interplay between detailed artisanship and exacting engineering. In our journey, we’ve unraveled the intricate dance of material selection, the precision demanded in design, and the finesse needed during assembly. Every step is pivotal, converging to yield a motor that promises unparalleled efficiency, performance, and reliability.

Consider the coreless motor – a manifestation of science and engineering in harmony. Serving myriad applications, from robotics to aerospace, its distinct design sets it apart. The omission of an iron core? Genius. Benefits stream in diminished cogging, faster response times, and an enviable power-to-weight ratio.

This engineering marvel has flown under the radar for too long, yet its ripple effects in industries demanding tight, efficient motion control can’t be ignored.But a note of caution: crafting such a motor is not for the faint-hearted.

It demands an unwavering eye for detail, an uncompromising commitment to precision, and a sound knowledge of electrical and mechanical nuances. And as with any endeavor of this magnitude, safety is paramount. After all, we’re navigating a world filled with intricate components and materials that, while essential, carry inherent risks.

We at Donghui Motor also have a lot of knowledge about other motor types. You can contact us at any time and we have dedicated personnel to answer your questions.


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