What Is an Electromagnet Holding Solenoid?

An electromagnet holding solenoid, also known as an electro holding magnet, is a device designed to securely hold ferromagnetic parts using electromagnetic force. It consists of a steel housing and an internal coil. When energized, the coil generates a magnetic field that holds the metal object in place—this is commonly referred to as an “energize-to-hold” mechanism.

Dr. Solenoid offers two types of DC 12V or 24V electromagnet holding solenoids:

Switched-ON to Hold (energize to attract and hold)

Switched-OFF to Hold (de-energize to release)

Our Product Range

We supply both round and rectangular solenoid electromagnets, available in DC 12V or 24V, with size options ranging from Ø8 mm to Ø100 mm, and holding forces from 2N to 2400N.
Pricing is negotiable based on order quantity.

Key Advantages

✦ High Holding Force
Electromagnets offer strong clamping power, enhanced by durable nickel plating for resistance in demanding applications.

✦ Easy ON/OFF Control
Magnetic force is activated or deactivated with a simple electrical current, making it highly energy-efficient and user-friendly.

✦ Remote Operation
Since the magnet is controlled via electric current, it can be safely operated from a distance—minimizing risk and improving operational safety.

✦ Flexible Mounting Options
Available in multiple sizes and shapes, our electromagnets can be mounted to fit various systems and structures.

 AS 6035 Best electro holding magnets DC 24 V strong force from Dr solenoid

Structure and Working Principle

The electro holding magnets is an electromagnetic fixture that fixes the workpiece by the suction force generated by the solenoid coil inside after the electromagnetic coil is energized. The The electro holding magnets consists of several parts such as the iron core, solenoid coil, panel and bobbin.   The electro holding magnets composed of the solenoid coil and the iron core is the main part of the unit.  The electro holding magnets is different due to the difference in design methods or materials used, and is also constantly developing and improving. The electro holding magnets is used on the grinder instead of using splints and bolts to fix the workpiece being ground. Such an The electro holding magnets is relatively simple and can only fix flat workpieces. This is the traditional electromagnets, and its application has great limitations. With the development of industry, Solelnoid enterprises have an increasing demand for electromagnetic tools, and the requirements are getting higher and higher, prompting people to continuously update the application of the electro holding magnets.

Electro holding magnets style.

Generally, there are two styles of circular suction cup electromagnets, ordinary style (i.e., power on, power off, release); holding style (power on, release, power off, just the opposite of the ordinary style) The suction surface can also be made into various shapes according to actual needs, such as arc shape, V shape, etc.

Product principle: When the solenoid coil inside is energized, magnetic energy is generated, the housing and the middle iron core are magnetized, and then a magnetic field loop is generated, so the suction cup product must rely on the suction surface to work. At a distance of 0mm, the suction cup electromagnet has a strong force despond on different size.

Advantages: Advantages of suction cup electromagnets: 0mm distance suction force is large, which is different from the concept of frame and round tube electromagnets, and the force generated is also different; in the case of spacing, the attenuation force is also different, 0-5mm is attenuated by 65%, 5-10mm is attenuated by 85%, and the force generated at different distances is also different; in terms of installation, it can be designed according to requirements to meet the application of various occasions.

The electro holding magnets has been improved in a series of ways to meet the needs of production. The electromagnetic suction cup is optimized and designed according to customer requirements to solve the serious problems of fast heating, large residual magnetism, and uneven suction surface. The suction force and volume of the circular suction cup type electromagnet product can be customized according to the required requirements. Products of different sizes use different power and functions.

 What is a small round electric holding electromagnet

small round electric holding electromagnet is a permanent holding electromagnet built in a small magnet inside. It features power on to release and power off to hold during operation.

•  Part 1 ： The structure of 2015 DC Lifting electromagnet
• 1.1： Iron core: usually located in the middle of the coil, it is an important part of the electromagnet to generate magnetic force. It is made of soft magnetic materials and can be 
•          magnetized to enhance the magnetic field when powered on.
• 1.2：Solenoid Coil: it is made of copper wire, it is the source of the magnetic field. When DC current is passed through, a magnetic field will be generated around it. The larger the
•        current and the more turns of the coil, the stronger the magnetic field.
• 1.3: Panel: it is usually made of magnetic conductive material, located on the adsorption surface of the electromagnet, it can guide the magnetic lines to be concentrated, making
•       the adsorption force more concentrated and effective, and increasing the suction force on the workpiece.
• 1.4 Bottom housing: it is the role of supporting and protecting the internal iron core, solenoid coil and other components. It is generally made of solid materials such   as carbon 
•       steel plates to ensure the overall structural strength of the electromagnet.
• 1.5 Electric wire: it is used to connect an external power supply, input current to the solenoid coil, and enable the electromagnet to work normally.
•  
• Part 2 : Working Principle
• Based on the principle of electromagnetic induction, when current passes through the solenoid coil of the suction cup electromagnet, a magnetic field is generated around the solenoid coil, which magnetizes the iron core, and the magnetized iron core further enhances the magnetic field strength. At this time, if a magnetic workpiece approaches the panel of the suction cup electromagnet, the workpiece will be tightly sucked under the action of the magnetic field force. When the current of the coil is cut off, the magnetic field disappears quickly, the magnetism of the iron core also disappears, the workpiece loses suction and separates from the suction cup, thus achieving demagnetization.

 What is a Reverse Permanent Lifting electromagnet?

The direction of the magnetic field lines depends on the direction of the current flowing through the solenoid coil of the electromagnet.  A "reverse permanent lifting electromagnet" isn't a standard, widely - known term. a Reverse Permanent lifting electromagnet is a device that uses an electromagnetic field to lift ferromagnetic materials like iron and steel

Reverse Permanent Lifting electromagnet is to Reversing the direction of the electric current reverses the direction of the magnetic field lines which reverses the polarity of the magnet.

What are the advantages of using a reverse permanent lifting electromagnet compared to other types of magnets? 

1. Enhanced control:

- A reverse permanent lifting electromagnet combines the properties of a permanent magnet and an electromagnet. The ability to reverse the magnetic field provides more precise control over the lifting and releasing of objects. For example, in a factory setting, it can be used to pick up and release small metal parts with greater accuracy than a simple permanent magnet, which has a constant magnetic field and may not release the parts as easily.

2. Energy efficiency:

- Once the object is initially attracted using the combined magnetic field (permanent and electromagnetic), the power to the electromagnet can be reduced or adjusted. The permanent magnet component helps to maintain the hold on the object, saving energy compared to a traditional electromagnet that requires a continuous supply of a relatively high current to maintain the lifting force.

3. Versatility:

- It can handle a wider range of ferromagnetic materials. The adjustable magnetic field strength and direction allow it to work with different shapes, sizes, and weights of objects. For instance, it can be used to lift both heavy steel plates in a construction site and tiny metal components in an electronics manufacturing plant. In contrast, a simple permanent magnet may not have the flexibility to handle such a diverse range of objects effectively due to its fixed magnetic strength and polarity.

4. Safety:

- The reverse function can enhance safety. In a situation where the object needs to be quickly released, such as in a conveyor - based sorting operation, the ability to reverse the magnetic field ensures a reliable release mechanism. This can prevent jams or accidents caused by objects not being properly released, which is an advantage over other type