Rubber coated heavy duty magnets, also called mounting magnets or large magnets, provide an easy way to attach heavy objects without drilling or welding.

These big magnets feature a robust design, typically housing a powerful NdFeB magnet (neodymium magnet) within a durable rubber casing. The magnet is strategically positioned to concentrate its magnetic field on one side, maximizing attraction to ferrous surfaces. This protective housing not only ensures the magnet’s longevity but also prevents damage during handling and use, making these magnets perfect for various applications.

The main components of these strong magnets are neodymium magnets， also known as NdFeB, NIB or Neo magnet. These permanent magnets are made from an alloy of neodymium, iron, and boron, forming a Nd₂Fe₁₄B crystalline structure. They are the most commonly used type of rare-earth magnet and are the strongest permanent magnets available commercially.

What Type of Magnets Are the Strongest?

Neodymium magnets (NdFeB magnets) are the strongest magnets available commercially. They belong to the rare-earth magnet family, which also includes samarium cobalt magnets. Their exceptional strength is due to their composition of neodymium, iron, and boron, forming the Nd₂Fe₁₄B crystalline structure. This unique arrangement allows for a high magnetic energy product, making them ideal for heavy-duty applications.

What Is the Most Powerful Type of Permanent Magnet?

The most powerful type of permanent magnet is the neodymium magnet. Specifically, the N52 grade neodymium magnet represents one of the highest grades available, offering superior magnetic strength. These magnets are capable of lifting or holding objects many times their own weight. In comparison, while samarium cobalt magnets are also strong and have better temperature stability, they do not match the magnetic strength of neodymium magnets.

Applicaitons of Rubber Casing Strong Neodymium Magnets

What Are Heavy Duty Magnets Used For?

High Strength Magnets have a wide range of applications across various industries:

• Industrial Manufacturing: Used for holding, lifting, or separating metal parts.
• Construction: Ideal for mounting fixtures without drilling or welding, preserving the integrity of surfaces.
• Automotive Industry: Employed in assembling and holding components during production.
• Oil & Gas Industry：Magnets used in the oil and gas industry provide reliable solutions for scaffolding fixation, pipeline fixation, and wire/cable mounting.
• Wind Industy: Magnets used in the wind industry, such as in wind turbine generators, fastening ladders, and securing main cables in wind towers, provide strong and reliable solutions for various applications.
• Advertising and Signage: Securely attach signs or displays to metallic surfaces.
• Magnetic Fishing: Powerful magnets are used to retrieve metal objects from bodies of water.
• Home and Office: For organizing tools, hanging heavy items, or creating magnetic surfaces. Daily use magnets are versatile and can be found in many common household and office items.

These magnets are ideal for situations that require strong, reliable magnetic force without permanently altering the surfaces they are applied to.

Traditionally, people mount objects by drilling holes or welding, but drilling weakens the steel plate and can lead to metal fatigue and corrosion, compromising safety. Welding requires skilled labor and adds to construction time and cost. Using our rubber-coated super magnets is a better solution—they offer flexibility and efficiency. No welding, no drilling, no screws, and easy to use. You can easily attach or remove them without damaging the structure.

Rubber-coated powerful magnets are versatile and strong tools for many uses. Made with rare earth magnets, they can lift heavy objects. These magnets are covered with a protective nickel-plated rubber coating, making them more durable and powerful than traditional magnets. With the proper care, these strong magnets can last for many years and provide the perfect solution for difficult jobs that require powerful magnets.

Heavy Duty Mounting Magnets

We offer rectangular N52 and N50 neodymium magnets with rubber coating, featuring either a sandwich magnet assembly or a U-profile channel magnet assembly inside. These designs maximize magnetic strength and are part of the rare earth magnet family.

One of our top sellers is the RCHNL84M rubber coated magnet. Coated with black TPV rubber and featuring an M10x30 stainless steel male thread, this magnet measures 85x50x35mm but boasts a vertical holding force of up to 3500N (786 lbs) thanks to its unique design. The sandwich magnetic assembly inside exposes the working surface without rubber coating, allowing direct contact where magnetic flux is concentrated.

We also offer a lower force version of 1200N (270 lbs) and a fully rubber coated version at 1500N (337 lbs) with the same dimensions to cater to different applications.

Another best-seller is the RCHNLxxM-VT series. This U-profile channel magnet assembly is fully encapsulated in blue EPDM rubber, featuring a stainless-steel threaded stem on top. Available in three sizes, their vertical holding force ranges from 1000N (225 lbs) to 4000N (900 lbs). These magnets have excellent shear force performance, making them perfect for hanging heavy objects in a shear direction.

Benefits of Rubber Coating

The TPV and EPDM rubber materials used in coating these magnets offer:

• Long-Term Aging Resistance
• Anti-Corrosion Properties
• UV Protection
• Oil Resistance

These properties ensure durability even in harsh working conditions, providing reliable performance over extended periods.

TPV and EPDM rubber material feature great long-term ageing, anti-corrosion, UV-proof and anti-oil properties. So no need to worry about the quality even for a long period of applications in harsh working condition.

These powerful and strong magnets have an incredibly high pull force, making them ideal for lifting magnet applications. Nickel plated rubber covered heavy duty magnetic systems are very popular due to their flexibility and durability. They provide reliable performance in large neodymium magnets lifting operations and can be used in extremely challenging environments.

While heavy-duty mounting magnets provide numerous benefits, it is essential to handle them with care. Due to their strong magnetic fields, they can exert significant attractive forces and can pose risks if mishandled or brought close to sensitive equipment or individuals with pacemakers or other medical devices. It is important to follow the manufacturer’s instructions and guidelines for safe and proper usage.

FAQs (Frequently Asked Questions)

Why Are Neodymium Magnets So Strong?

Neodymium magnets are extraordinarily strong due to their unique material composition. These magnets are made from neodymium (a rare earth element), iron, and boron. NeFeB boasts one of the highest magnetic moments among natural elements. When combined with iron and boron, which also possess strong magnetic properties, it results in a powerful combination. The crystalline atomic structure of neodymium enables the alignment of magnetic moments, enhancing the overall magnetic field. Moreover, n52 neodymium magnets exhibit high coercivity, allowing them to resist demagnetization. The sintering process, which involves compacting and heating the materials, further aligns magnetic domains, resulting in their exceptional strength. This combination of factors creates strong neodymium magnets with a high energy product and unparalleled magnetic potency.In contrast, ferrite magnets are less potent due to their lower magnetic moments and less ordered structures. While other rare-earth materials exhibit strong magnetism, neodymium’s combination of properties, including high coercivity and the sintering process, distinguishes it as the strongest magnet in the market.

What Are High-Strength Neodymium Magnets Used For?

How do people use very strong magnets? They are used in various innovative ways:

1. Industrial Lifting Systems:

In industry, they underpin powerful lifting systems for handling heavy materials in settings like scrapyards and metal fabrication.

2. Magnetic Separation:

These large rare earth magnets enable efficient magnetic separation of ferrous materials in mining and recycling.

3. Medical Devices:

Used in MRI machines and other specialized equipment.

4. Electric Motors and Generators:

Magnet is also the key components in high-efficiency motors.

5. Prefabrication:

In construction, they’re used for securing formwork and in steel framework assembly.

6. Magnetic Fastening:

In daily life, these magnets can be found in heavy-duty magnetic door latches and even for hanging heavy objects on magnetic boards. Their remarkable strength and reliability make them indispensable for applications demanding substantial lifting and holding capabilities.

Their strength and reliability make them indispensable in applications requiring significant lifting and holding capabilities.

Are Neodymium Heavy Duty Mounting Magnets Dangerous?

While incredibly useful, powerful neodymium magnets can be dangerous if mishandled:

• Physical Injury: Strong attractive forces can cause magnets to snap together quickly, posing a risk of pinching or crushing fingers.
• Health Risks: Should be kept away from individuals with pacemakers or other medical implants, as the magnetic fields can interfere with these devices.
• Electronic Interference: Can affect electronic devices like smartphones, credit cards, or magnetic storage media.
• Swallowing Hazard: Small magnets pose a severe risk if ingested, especially for children.

It’s essential to handle these magnets with care, follow safety guidelines, and keep them away from vulnerable individuals and sensitive equipment.

Are Bigger Magnets More Powerful?

While it might seem intuitive that larger magnets are more powerful, size isn’t the only factor that determines a magnet’s strength. The magnetic force of a magnet depends on:

• Material Composition: Neodymium magnets are stronger than other types of magnets like ferrite or alnico magnets, regardless of size.
• Magnet Grade: Higher grades (e.g., N52) indicate a stronger magnetic field.
• Design and Shape: The shape and magnetic circuit design can concentrate the magnetic field effectively.
• Volume and Mass: A bigger magnet has more magnetic material, which can contribute to a stronger magnetic field.

However, a smaller neodymium magnet can be stronger than a larger ferrite magnet. Therefore, while size contributes to strength, the type of magnet and its material properties are crucial factors.

How to Make a Magnet Stronger?

Enhancing a magnet’s strength can be achieved through several methods:

• Stacking Magnets: Placing magnets in series can increase the overall magnetic force.
• Using Higher Grade Materials: Replacing a magnet with one made from a stronger material, like upgrading from ferrite to neodymium.
• Proper Storage: Storing magnets with keepers (soft iron pieces) can maintain their strength by preserving magnetic alignment.
• Avoiding Heat and Physical Damage: Excessive heat or impact can demagnetize magnets; protecting them maintains their strength.
• Magnetizing Techniques: Re-magnetizing a magnet using a stronger magnetic field can restore lost strength.

For permanent magnets like neodymium magnets, their strength is inherent, and while they can be maintained, significantly increasing their strength typically requires replacing them with a stronger magnet.

How to Store Permanent Rare Earth Magnets?

To store neodymium rare-earth magnets safely, it’s important to take precautions because of their powerful magnetic fields. Here’s how to store them effectively:

1. Use Non-Magnetic Containers: Store the magnets in containers made of materials like plastic or cardboard to avoid unwanted attraction to metal objects.
2. Keep Away from Electronics: Place magnets away from electronics, credit cards, and pacemakers, as their strong magnetic fields can damage these items.
3. Store Separately: Keep large neodymium magnets apart from each other to prevent them from attracting and colliding, which could cause them to chip or break.
4. Label the Containers: Mark the containers with the magnet’s strength to easily identify them and prevent mishandling.
5. Wear Protective Gear: Always wear safety goggles and gloves when handling magnets, as they can cause pinching injuries if mishandled.

By following these storage and handling guidelines, you’ll keep the magnets safe and maintain their integrity for long-term use.

Conclusion

Rubber coated heavy industrial magnets offer a powerful and flexible solution for various industrial and personal applications. Their combination of robust NdFeB magnets and protective rubber coatings make them perfect for mounting, lifting, and holding tasks without causing damage to surfaces. Understanding the properties of these powerful magnets, their safe handling, and appropriate applications ensures that you can leverage their capabilities effectively. Whether you’re using them in industrial manufacturing or creative projects, these super strong magnets provide unmatched performance and convenience.

Large Heavy Duty Rubber Coated Magnets Parameter Table

	Item No.	L (mm)	W (mm)	H (mm)	M	Pull Force (Kg)	Pull Force (N)	Pull Force (Lbs)	Weight (g)
	RCNL85M-1200	85	50	65	10	122	1200	270	944.9
	RCNL85M-3500	85	50	65	10	356	3500	786	975
	RCNL88M-1500	88	53	67	10	150	1500	337.5	974.5
	RCHNL5F-N	125	61	28		200	2000	450	1002.4
	RCHNL4M	100.5	61	28	M10x26	100	1000	224	789.9
	RCHNL5M	125	61	28	M10x26	200	2000	450	998.4
	RCHNL8M	203	61	27.5	M10x26/M10X31	400	4000	899	2050
	RCHNL4M-VT	100.5	61	28	M10	100	1000	224	900
	RCHNL5M-VT	125	61	28	M8/M10	200	2000	449	1000
	RCHNL8M-VT	203	61	28	M10	400	4000	899	1693

 

* We test the holding force of magnetic assembly by attaching it on a 20mm thick steel plate (low carbon steel with no coating) at room temperature and then pulling it slowly in vertical direction with the device that is sensitive enough to record the strength at the moment when magnetic assembly is separated from the steel plate. This is to give you a reference while the actual holding force in real application could be different with the change of pulling direction, thickness of the steel, surface treatment, etc.