FAQ - Questions and answers about neodymium magnets

Neodymium magnet – what is it and how does it work? What do we use these strong magnets for?

Dive into the fascinating world of neodymium magnets – discover their extraordinary strength and versatile applications! Here you will find detailed answers to the most frequently asked questions, helping you understand how they work and what they can be used for. Find out why neodymium magnets are considered the most powerful permanent magnets and how using them can make your life easier.

1. Orders, logistics, and payments

Everything about the purchasing process, B2B invoices, and international shipping.

We offer a wide range of safe payment methods: fast online transfers (BLIK, PayU/Przelewy24), traditional bank transfer to the account, as well as cash or card payment to the courier upon delivery (COD).

Transaction details:
All electronic transactions are encrypted with SSL protocol (256-bit). In the case of a traditional transfer, we ship the goods after the payment is credited (usually the next business day). Cash on delivery allows for immediate shipment. Full transfer details can be found in the transport and payments section.

Orders placed and paid for (or COD) by 2:00 PM on business days are usually shipped the same day. Couriers deliver packages in 95% of cases within 24h (the next business day).

Logistics in detail:
The DHIT warehouse operates continuously on business days. If you order goods on Friday by 2:00 PM, the courier will pick them up the same day, and delivery will take place on Monday. InPost parcel lockers in some areas are also serviced on Saturdays (Weekend Parcel service), but this depends on the carrier's current offer. You will receive the shipment status by email immediately after the label is generated.

The cost depends on the total weight of the order and the selected method (Courier, Parcel Locker, Pallet). We offer free delivery for orders over a certain amount. Check the thresholds in the transport tab.

Why does weight matter?
Neodymium magnets are heavy (density similar to steel). A small package can weigh several kilograms. The system in the cart automatically sums up the weight of all products and selects the cheapest option.

Yes, we are a VAT payer. We issue a full 23% VAT invoice for every order.

Information for accounting:
The invoice is generated automatically after the goods are shipped and sent in PDF format to the email address provided in the order (in accordance with the 'paperless' idea). If you need a paper invoice attached to the package, please inform us in the order notes. We also handle Intra-Community Supply of Goods (ICS) transactions with a 0% VAT rate for EU companies with an active EU VAT number.

Yes. Select 'Traditional transfer' as the payment method, and in the order notes, write a request for a proforma. The system will generate a document for payment.

Yes, we ship to all European Union countries. The cost of international shipping is calculated automatically in the cart after selecting the delivery country. In the case of shipments outside the EU (export), please contact us individually.

Consumers have 14 days to return goods without giving a reason. The goods must be in an unaltered state (undamaged, scratched). Details in the returns section.

You can do this on the order status page by entering the order number and email.

2. Basics: what are magnets?

Definitions, chemical composition, and basic differences between materials.

It is the strongest type of permanent magnet commercially available on Earth. It is made of sintered powdered elements, mainly neodymium, iron, and boron.

Chemical formula and structure:
The basic component is the tetragonal phase Nd₂Fe₁₄B. This structure has exceptionally high magnetocrystalline anisotropy, which means it is very difficult to change the direction of its magnetization. This feature gives neodymium magnets such enormous coercivity (resistance to demagnetization) and allows them to store powerful magnetic energy in a small volume.

This is a group of 17 chemical elements that are crucial for modern technology. Neodymium (Nd) is the most important of them in magnet production.

Full list of rare earth elements (REE):

Scandium (Sc, 21)
Yttrium (Y, 39)
Lanthanum (La, 57)
Cerium (Ce, 58)
Praseodymium (Pr, 59)
Neodymium (Nd, 60) – key component of magnets
Promethium (Pm, 61)
Samarium (Sm, 62) – used in SmCo magnets
Europium (Eu, 63)
Gadolinium (Gd, 64)
Terb (Tb, 65) – additive increasing temperature resistance
Dysprosium (Dy, 66) – ditto
Holmium (Ho, 67)
Erb (Er, 68)
Thulium (Tm, 69)
Ytterbium (Yb, 70)
Lutetium (Lu, 71)

The name 'rare' is historically misleading – these elements are quite common in the Earth's crust, but they rarely occur in large, concentrated deposits, making their extraction and separation a difficult, expensive, and environmentally burdensome process.

The difference is huge, both in power and application. A neodymium magnet is about 10 times stronger than a ferrite one of the same dimensions.

Property comparison:

Strength (BHmax): Neodymium (up to 52 MGOe) vs Ferrite (up to 4 MGOe).
Appearance: Neodymium is silver (nickel-plated), Ferrite is dark gray/black (ceramic).
Corrosion: Neodymium rusts very easily (must have a coating), Ferrite is completely resistant to rust (iron oxide).
Price: Neodymium magnets are much more expensive due to the content of rare earth elements.
Conductivity: Neodymium conducts electricity (metal), Ferrite is an insulator.

It means that the magnet does not require an external power source (electricity) to generate a magnetic field and retains its properties for a very long time.

Stability over time:
Modern neodymium magnets are extremely stable. Under normal conditions (room temperature, no strong opposing magnetic fields), they lose less than 1% of their power over 10 years. This means that a magnet bought today will work just as effectively in 100 years, provided it is not physically destroyed or overheated.

A neodymium magnet works all the time. An electromagnet works only when current flows through it. If you need to 'turn off' the magnetic field, you need an electromagnet (which we do not have in our offer) or a magnetic lifter with a lever.

We offer: cylinders, blocks (plates), rings, as well as spheres and countersunk magnets.

3. Magnet fishing (searching in water)

Equipment selection, GOLD series (3 eyes), technical advice, and law.

These are our flagship models that solve the biggest problem for searchers: 'how to set the magnet so it doesn't stand vertically on the bottom?'. Thanks to the housing with **3 mounting holes** (one central, two side), you have full control.

Detailed specification of the GOLD series:

F200 GOLD (UMP 75x25 [M10x3]): The ideal compromise. Field intensity ~7500 Gauss. Two side mounts and one top mount. Great for a start, lightweight but effective.
F300 GOLD HOLOGRAM (UMP 94x28 [3xM10]): Universal 'combine'. Larger diameter (94mm) and thickness (28mm) generate a field of ~9000 Gauss. This is the model most often chosen by advanced amateurs.
F550 Silver Black (UMP 94x40 [3xM10]): A monster for special tasks. It has a special Silver Black coating resistant to salt and harsh chemical conditions. It is almost twice as thick as the F200, which translates into deep magnetic field penetration.

Physics of 3 holes:
By mounting the eyelet on the side, you shift the center of gravity. By pulling the rope, you force the magnet to lie flat against the river bottom. Thanks to this, you use 100% of the active surface of the magnet, not just its edge (as in cheap magnets with only one top eyelet).

For an adult who wants to find something real, not just 'wet the line', we recommend avoiding the weakest models (below 100kg) and aiming for the mid-range.

Our sales ranking and recommendations:
1. Choice No. 1 (Universal): Set F200 GOLD (290kg). This is the best price-to-performance ratio. You will pull out a bike, safe, or road signs with it, and you won't tire your arm after 10 throws.
2. Choice No. 2 (Strong): F300 GOLD (330kg+). If you have the budget and strength, this model will give you an advantage thanks to a wider magnetic field (you will search the bottom faster).
3. Choice No. 3 (Extreme): F550 Silver Black. Only for people aware of the risk – this magnet 'sticks' so strongly that detaching it from a flat sheet metal underwater may be impossible without a winch.

The rope is your only protection against losing equipment worth several hundred zlotys. Ordinary construction twine is not enough.

Rope and knot physics:
Each knot weakens the rope by about 30-50% of its nominal strength (notch effect). Therefore, the rope must have a huge power reserve.

Material: Polypropylene (PP). It does not absorb water (does not get heavy), is resistant to acids and bases, floats on water (easier to fish out if you let go of the end).
Weave: Core braid. The outer sheath protects against abrasion on stones, the core carries the weight.
Diameter vs ergonomics: For F200, 6mm is enough (strength ~500kg). For F550, we recommend 8-10mm. Why? A thin rope under heavy load acts like a knife – it cuts into hands. A thicker rope means greater pulling comfort.

The topic is controversial, but the law is precise regarding monuments and weapons. Throwing a magnet into the water itself is not prohibited (it is not fishing), but the key is WHAT you pull out.

Legal interpretation:

Monuments (Act on the protection of monuments): Searching for hidden or abandoned monuments using electronic and technical devices (including magnets) requires a permit from the Voivodeship Conservator of Monuments (WKZ). If you pull out an old sword, coin, or tank part – it becomes the property of the State Treasury. Appropriation is a crime.
Weapons and Unexploded Ordnance (Act on weapons and ammunition): Fishing out a gun or grenade imposes an obligation on you to immediately notify the Police (112). You must not move it, take it home, or clean it. This is a mortal danger (unexploded ordnance is chemically unstable) and a criminal risk (up to 8 years in prison for possession).
Scrap metal: Extracting modern rubbish (caps, pipes, cans) is treated as cleaning the environment and is allowed, unless the regulations of a given water body (e.g., PZW) state otherwise.

River water is a chemical cocktail. Neodymium (Nd), which is part of the magnet, is a very reactive element and without a coating, it oxidizes (rusts) rapidly, turning into powder.

Maintenance procedure:
1. Washing: After fishing, rinse the magnet with clean tap water (wash off mud, algae, and humic acids).
2. Drying: This is key. Wipe it dry. Water trapped in the handle housing will cause the core to swell and the nickel coating to crack.
3. Preservation: Lubricate the steel handle housing with oil, WD-40, or wax. The steel housing (even galvanized) loses its protective layer over time from hitting the bottom. F550 Silver Black models have better factory resistance, but also require care.

A magnet with a lifting capacity of 300kg sucked to a flat sheet pile driven into the bottom is impossible to detach with human muscle power if you pull straight towards yourself (according to the vector of attraction force).

Rescue techniques:

Change vector (Angle): Walk 50-100 meters sideways along the bank. By pulling at an angle, you change the tearing force (the largest) into shear force (sliding), which is 80% smaller. The magnet will slide to the edge of the obstacle and let go.
'Shot' method: Stretch the rope like a guitar string and release it abruptly. The shock wave on the rope can break the magnet's grip.
Leverage: Use a thick branch as a lever, wrapping the rope around it.
Last resort: Hand winch (so-called 'tryzubi') or car winch. Remember – the rope has its breaking strength!

Water hides the history of the last 100 years. Polish rivers and lakes are full of surprises.

Finds statistics:

80% - Scrap: Caps, nails, wires, fragments of fences, cans, parts of agricultural machinery.
15% - Utility items: Bicycles, scooters, workshop tools (wrenches, hammers), fishing rods, phones, and even safes (usually empty after theft).
5% - Militaria and History: Bayonets, helmets, casings, weapon parts, uniform buttons. It is for these 5% that most people start their adventure with Magnet Fishing.

4. Technical parameters and physics

Detailed knowledge for engineers and constructors.

This is the material energy class designation (Grade).

Deciphering the symbol:

Letter 'N': Means 'Neodymium' and standard maximum operating temperature (80°C).
Number (e.g., 38, 42, 52): Means the so-called BHmax (Maximum Energy Product) expressed in MegaGauss-Oersteds (MGOe).

What does this mean in practice?
The higher the number, the stronger the magnet with the same volume. An N52 magnet is about 35-40% stronger than an N35 magnet of identical dimensions. N52 is currently the strongest material available in mass production.

The range depends on the size and shape of the magnet. Generally: the larger the pole area and magnet thickness, the greater the range. Small magnets work for a few millimeters, huge ones for a dozen or so centimeters. The field weakens with the square of the distance.

Standard neodymium magnets (without a letter after the number, e.g., N42) lose their magnetic properties irreversibly if heated above 80°C.

Available high-temperature classes:

N (Standard): up to 80°C
M (Medium): up to 100°C
H (High): up to 120°C
SH (Super High): up to 150°C
UH (Ultra High): up to 180°C
EH (Extra High): up to 200°C
AH (Axial High): up to 230°C

Remember that as temperature resistance increases, the maximum available power (remanence) of the magnet usually decreases slightly.

These are two key parameters describing every magnet in physics.

Remanence (Br):
This is the so-called magnetic remanence. It determines how strong the magnetic flux remains in the material after its saturation. For neodymium magnets, it is usually between 1.1 and 1.48 Tesla. This is a parameter speaking about the 'strength' of the magnet.

Coercivity (HcJ):
This is the magnetic field intensity needed to completely demagnetize the material. The higher the coercivity, the harder it is to 'spoil' the magnet through the action of an external field or temperature. Neodymium magnets have very high coercivity, which is why we call them permanent magnets.

Internal induction (Br) is often confused with induction on the surface.

Measurements:

Inside the material (Br): 11,000 - 14,800 Gauss (1.1 - 1.48 T).
On the pole surface: Depends on the shape! A flat plate magnet may have 2500 Gauss, and a long N52 cylinder even 6500 Gauss in the center of the pole. It is usually between 0.3 and 0.6 Tesla.

We measure this using a teslameter (gaussmeter) with a Hall probe.

The density of sintered NdFeB is approx. 7.5 g/cm³. It is similar to steel and zinc.

Axial: Poles are on flat surfaces (like a coin - heads is N, tails is S). This is standard for 99% of our magnets.
Diametrical: Poles are on the sides of the cylinder (as if you cut the cylinder lengthwise). Rarely used, e.g., in rotation sensors.

Standard neodymium magnets are produced with a tolerance of +/- 0.1mm. This means that a 10mm magnet can actually be between 9.9mm and 10.1mm.

Standard Ni-Cu-Ni coating is approx. 15-30 micrometers thick. It is very thin but effective.

5. Mounting, gluing, and processing

How to safely connect magnets with other materials.

Magnets have a smooth, nickel-plated surface that is difficult to glue.

Recommendations:
The best results are obtained with two-component epoxy adhesives (e.g., Distal, Poxipol, UHU Endfest 300). They form a hard joint that fills irregularities well. For very small magnets, cyanoacrylate glues ('SuperGlue') can be used, but they are brittle and may let go upon impact. The magnet surface before gluing should be degreased (alcohol, acetone) and gently matted with sandpaper (watch out for dust!).

Absolutely NOT!

Hot glue guns heat the glue to temperatures of 150-200°C. Applying such hot glue to a standard neodymium magnet (max 80°C) will cause its immediate, partial, or complete demagnetization. The magnet will lose power irretrievably. Use only cold glues.

In home conditions, it is practically impossible and dangerous.

Why?

Hardness: Neodymium is a sintered ceramic, harder than tool steel. A regular HSS drill bit just slips.
Brittleness: The material cracks at the slightest stress.
Temperature: Friction during drilling will instantly heat the material above 80°C, destroying magnetism around the hole.
Danger: Neodymium dust is flammable (chips can self-ignite!) and toxic.

If you need a magnet with a hole, buy a ready-made product from the 'countersunk' series.

Only with professional diamond tools with copious water cooling. At home, it is dangerous and will destroy the magnet.

Forceful tearing (pulling in opposite directions) is doomed to failure with strong magnets.

Sliding technique:
1. Place the joined magnets on the edge of a stable, wooden table (wood is not magnetic).
2. Lean one magnet against the tabletop and slide the other one off the edge.
3. Pressing firmly, slide one magnet down off the other. The shear force needed to move is much smaller than the pull force.
4. Immediately move the magnets away from each other to a safe distance (min. 50 cm) so they don't 'snap' back (risk of crushing fingers and breaking magnets).

How to safely separate two strong magnets?

You need a pair where one magnet is glued with the N pole on top and the other with the S pole. If you use magnets with a countersunk hole, buy pairs (one with the phase on N, the other with the phase on S).

6. Practical applications

Inspiration for home, workshop, and industry.

Technically, a strong magnetic field can disrupt the operation of older rotor meters, magnetic couplings in water meters, or discs in electricity meters.

Legal warning:
Using magnets for this purpose is illegal and treated as theft of utilities (energy, water, gas). Modern meters are equipped with special magnetic field strips/indicators. Bringing a neodymium magnet close causes an irreversible color change of the indicator or saves an error in the electronic meter's memory. During an inspection, this is irrefutable proof of manipulation, which results in huge financial penalties and criminal proceedings.

Yes, it is a very cheap and effective way to protect the engine.

How does it work?
During engine operation, microscopic metal filings are created (wear of bearings, rings, shafts). A paper oil filter catches impurities up to approx. 20-30 microns. Smaller filings circulate in the oil, acting like abrasive paste. Attaching a strong neodymium magnet to the filter housing (or drain plug) catches ferromagnetic particles from the flowing oil, 'sticking' them to the wall. When changing the oil and filter, you throw away these impurities along with the old filter.

Glass boards are a challenge for magnets.

Physics of the problem:
Such a board consists of a steel sheet covered with a thick sheet of glass (usually 4-6 mm). The glass creates a huge 'air gap'. The magnet's attraction force decreases drastically with distance (inverse-square law). Ordinary black ferrite magnets are too weak to penetrate through the glass. You need large, thick neodymium magnets (e.g., cylinders 20x10mm or blocks) that generate a sufficiently deep magnetic field.

7. Safety and health

Hazards for people, children, and electronics.

They are not toys. The attraction force of large neodymium magnets is so huge that it can crush fingers and even break hand bones if they get between two colliding magnets. Colliding magnets also cause sharp pieces of coating and material to chip off (like glass). Always use protective goggles and thick gloves when working with large magnets.

YES, THEY ARE VERY DANGEROUS. People with a pacemaker or insulin pump must keep a distance of min. 30-50 cm from magnets. The magnetic field can switch the device to test mode or turn it off.

A strong field can disrupt the operation of the compass, magnetometer, and optical stabilization of the camera. Usually, it does not damage the phone permanently, but we recommend not keeping strong neodymium magnets directly next to the phone housing.

Cards with a magnetic strip (old type) – yes, they will be erased. Chip and contactless cards are usually safe, but it is better not to risk it.

Small magnets are deadly dangerous if swallowed (they can squeeze intestines). Do not give them to children! Large magnets can crush fingers.

Standard magnets are nickel-plated. For allergy sufferers, we recommend magnets coated with Gold, Epoxy (black), or magnets in sealed housings.

Air transport of magnets is restrictive (IATA). A strong field interferes with navigation. Magnets must be specially shielded with steel sheet. In hand luggage, they are usually confiscated by security control.

8. Troubleshooting

Why doesn't the magnet work as it should?

This is the most common problem. The lifting capacity given in the specification (e.g., 100 kg) refers to the perpendicular pull force (pulling perfectly upwards).

When you hang a magnet on a wall (vertically), shear force acts on it (gravity pulls down). The force needed to move the magnet along the metal is usually only 15-20% of its maximum lifting capacity. Additionally, neodymium magnets are coated with nickel, which is very smooth and slippery. To prevent the magnet from sliding down, you need to increase friction – use a magnet in a rubber housing or stick thin rubber/insulating tape to it.

There can be three reasons: 1. The sheet is too thin (the magnet does not close the field). 2. There is an air gap (rust, thick paint). 3. The metal alloy has poor magnetic properties.

Most stainless steels (e.g., 304, 316) are austenitic steels – they are non-magnetic. The magnet attracts only ferritic (e.g., 430) and martensitic steels.

Because you are trying to join them with the same poles (N to N or S to S). Rotate one of the magnets 180 degrees.

Magnets do not break by themselves. They break from impact (even micro-impact when joining). They are brittle like glass. If it broke, it means it hit metal or another magnet.

Probably the nickel coating was damaged (scratch, chip) or the magnet was used in a humid environment without adequate protection (e.g., waterproof glue).

9. Water and fuel magnetizers (Turbomag)

How to get rid of limescale in pipes and save fuel?

A magnetizer does not remove calcium from water (it is not a filter), but changes its physical structure. A strong magnetic field causes the precipitating calcium carbonate not to crystallize as hard, depositing 'scale' (calcite), but as soft powder (aragonite), which is flushed out of the installation. Thanks to this, you protect washing machines, dishwashers, central heating boilers, and sanitary installations from scaling.

The best place is the main water supply pipe to the building, after the water meter, and before branching to the house. In the case of protecting a specific device (e.g., an expensive gas furnace), it is worth installing a smaller magnetizer directly on the return pipe before the furnace. Our magnetizers are overlay types – you don't have to cut pipes, installation takes 5 minutes.

Yes, provided that a sufficiently strong field is applied. Magnetization of fuel (petrol, diesel, LPG) causes the ordering of hydrocarbon clusters. Thanks to this, the fuel-air mixture burns more thoroughly and faster. The result is smoother engine operation, reduced exhaust smoke, and fuel savings of 5-12% depending on the engine type and driving style.

10. Magnetic separators (industry)

Cleaning bulk and liquid products in production.

A separator is used to catch unwanted metal (iron) elements from the transported raw material. They are used in the food industry (flour, sugar, grain), plastics (granules), recycling, and mining. They protect crushing machines from failure and ensure the purity of the final product (HACCP systems).

It depends on the type. Simple separators (e.g., rods, grates) are cleaned manually – by taking them out of the product stream and wiping with a cloth or compressed air. Automatic and semi-automatic separators have pollutant discharge systems (e.g., sliding cleaning sleeves), which allows continuous operation without stopping the production line.

The standard in the food industry for catching fine filings is min. 6000-8000 Gauss on the rod surface. For very demanding applications (e.g., milk powder, spices), neodymium separators with a power of 10,000 - 12,000 Gauss are used, which catch even paramagnetic dust (e.g., worn stainless steel after processing).

11. Toys and education

NeoCube balls, physics experiments, and science.

NeoCube is a set (usually 216 pieces) of strong neodymium magnetic balls with a diameter of 5mm. It allows you to create an infinite number of shapes, chains, and 3D geometric figures. It is great anti-stress and logical fun for adults and teenagers. Note: Product not suitable for small children (risk of swallowing!).

Neodymium magnets are a great teaching aid. You can build: 1. Homopolar motor (battery, magnet, wire). 2. Magnetic train (battery, two magnets, and copper wire spiral). 3. Show the phenomenon of eddy currents by dropping a magnet in a copper pipe (it will fall very slowly). All accessories can be found in our educational section.

NeoCube balls are coated with a layer of nickel, gold, or black chrome. During intense play, the balls rub against each other, which after a longer time (several months/years) can lead to the coating wearing off at the contact points. This is natural mechanical wear.

12. Custom production and services

Unusual magnets and solutions for companies.

Yes. As a direct importer and distributor cooperating with factories, we can supply magnets of any shape (arc, trapezoidal), dimension, and magnetization direction. The minimum order quantity (MOQ) depends on the size of the magnet and the degree of complexity (usually from several dozen to several hundred pieces). The lead time is approx. 6-10 weeks.

Unfortunately, we do not provide services for regenerating old magnets. Magnetization requires dedicated coils (magnetizers) perfectly matched to the shape of a specific magnet. It is often cheaper and faster to buy a new, stronger neodymium magnet of similar dimensions.

Yes, for companies and industry, we offer a magnetic field measurement service (e.g., of separators) with a certified gaussmeter. We issue a measurement protocol necessary for HACCP / ISO audits.

13. Automotive and workshop (PDR, Taxi)

Magnets in the car, body repairs, and organization.

For this purpose, rubber-coated magnetic holders (with external or internal thread) are used. The rubber protects the paint from scratches and increases friction, preventing sliding at high speeds. We recommend using several holders with a diameter of min. 66mm or 88mm for secure mounting.

In the PDR method, very strong neodymium magnets (often in the shape of a sphere or cylinder) are used to locate the lance tip under the sheet metal and to pull out shallow dents using the induction method. These magnets must be protected with material (e.g., felt) so as not to damage the paint.

Yes. A magnetic plug catches iron filings from the gearbox or oil pan that fall to the bottom. This is especially important during the engine break-in period and in older cars where metal wear is greater. It is cheap protection against failure.

14. Construction and renovation

Locating profiles, inspection flaps, and cleaning.

You don't need an expensive detector. A strong neodymium magnet (e.g., cylinder 20x10mm) is enough. Move it slowly along the wall. The magnet will 'stick' in the place where steel screws fastening the board to the frame are located under the board. This is the cheapest and most reliable way to avoid drilling into the profile.

Use a set: 4 block magnets glued to the opening frame and 4 steel plates glued to the tile/flap. Thanks to this, the flap holds flush with the glaze, and in the event of a plumbing failure, it can be easily removed, e.g., using a glass suction cup.

The fastest way is with a magnetic sweeper. It is a device on wheels with a wide magnetic beam at the bottom. You drive over grass or sand, and the magnet pulls out all nails, screws, and filings, protecting your car tires and household members' feet.

15. Advertising and printing

Mounting banners, magnetic foils, and gadgets.

Magnetic foil is flexible (can be cut with scissors) but is very weak. It is used to make fridge magnets (promotional) or car stickers. It is not suitable for hanging heavy objects. For mounting banners or advertising boards, you must use hard neodymium magnets.

If the substrate is steel (e.g., a warehouse hall made of sandwich panels, a container), use magnetic hooks. They are mobile – you can change the position of the advertisement at any time without leaving holes. Remember to select the lifting capacity with a margin for wind gusts.

In printing (folders, premium boxes), thin block magnets (e.g., 10x10x1mm or round 10x1mm) hidden under a layer of paper are used. It is important to precisely pair the poles so that the box closes with a pleasant 'click'.

16. Modeling and hobby (figurines, RC)

Magnets in wargames, flying models, and mock-ups.

Standard are small cylinder magnets with dimensions of 3x2mm or 5x2mm (depending on the base size). They are glued into the bottom of the base, which allows for safe transport of the army in metal cases (figurines do not hit each other).

Instead of ugly clips, modelers use 'invisible mounts'. You need 4 pairs of strong ring or block magnets. You glue one part to the chassis posts, the other inside the body. The body holds firmly, and no holes are visible from the outside.

Neodymium magnets are great for mounting interchangeable weapons in tank/plane models or removable roofs in dollhouses. Use drill bits with the diameter of the magnet to hide it flush with the surface.

17. Tailoring and fashion

Magnetic clasps, bags, and clothing.

Yes, we offer special magnets in PVC covers for sewing in. The plastic casing allows sewing with a machine around the magnet, while protecting it from moisture (washing). They are perfect for invisible fastenings in coats or jackets.

Most often, so-called magnetic snaps are used. They consist of 4 elements (two plates, two magnets with 'legs'). Assembly does not require sewing – just cut the material, insert the legs, and bend them with pliers. It is a quick and durable repair.

Ordinary neodymium magnets – no. Water and detergents will destroy the nickel coating, and the magnet will rust and stain clothes. For clothing, use only waterproof magnets (in PVC foil) or special snaps made of brass/stainless steel.

18. Office and organization

Boards, cable organization, and magnetic paints.

Magnetic paint contains iron filings, but their layer is very thin. Ordinary school magnets are too weak. For magnetic walls, you must use light but strong neodymium magnets with a large contact surface. Avoid heavy ceramic magnets that slide down under their own weight.

You can stick small magnets to cable plugs (with heat shrink tubing or tape) and mount a metal strip on the edge of the desk. Thanks to this, cables do not fall behind the desk and are always at hand. It's a popular 'lifehack'.

Yes. Glass boards require special, very strong magnets in a housing (often in the shape of a pawn or cylinder). Ordinary office magnets will not penetrate through thick glass. Look in our offer for products marked as 'for glass boards'.

19. Meteorite hunting and geology

Identification of stones and mineral separation.

Most do. Over 90% of meteorites (chondrites, siderites) contain nickel-iron, which reacts to a magnet. A strong neodymium magnet is the basic tool of a meteorite hunter. However, remember that attraction does not give 100% certainty – magnetite (earth stone) also reacts to a magnet.

Gold prospectors use magnets to separate so-called 'black sand' (magnetite) from the pan. Magnets in a special housing with a release mechanism are used for this (so that you don't have to clean the magnet manually from filings). The magnet pulls out the black sand, leaving gold, which is non-magnetic, at the bottom of the pan.

20. Electronics and sensors

Reed switches, Hall effect, and DIY projects.

Hall sensors detect a magnetic field. Usually, a small neodymium magnet (e.g., 3x3mm) is enough to trigger them. They are used in rotational speed measurement, electric bike throttles, or as limit switches in 3D printers. Proper pole alignment relative to the sensor is important.

We do not deal with service, but we sell ring magnets, which are the heart of every speaker. Replacing a ferrite magnet with a neodymium one in a speaker allows for drastically reducing its weight and increasing efficiency, but requires precise coil centering.

A reed switch is a glass tube with contacts that close when a magnet is brought close. It is the simplest door/window opening sensor (alarm systems). A flat neodymium magnet glued to the window sash is enough for correct operation. It is a cheap and failure-free solution.

Didn't find the answer to your question?

Our experts will be happy to help you choose the right magnet.