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Neodymium magnets – most powerful on the market

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Grips for underwater searches

Discover your passion involving underwater treasure hunting! Our specialized grips (F200, F400) provide safety guarantee and huge lifting capacity. Stainless steel construction and strong lines are reliable in rivers and lakes.

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Proven solutions for mounting without drilling. Threaded grips (external or internal) provide quick improvement of work on production halls. They are indispensable installing lamps, detectors and banners.

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UMGW 16x13x5 [M4] GW / N38 - magnetic holder internal thread

magnetic holder internal thread

Catalog no 180315

GTIN/EAN: 5906301813712

5.00

Diameter Ø

16 mm [±1 mm]

Height

13 mm [±1 mm]

Height

5 mm [±1 mm]

Weight

6.6 g

Load capacity

5.00 kg / 49.03 N

see parameters »

3.80 ZŁ with VAT / pcs + price for transport

3.09 ZŁ net + 23% VAT / pcs

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Carbon Footprint – environmental impact GPSR Regulation – product safety
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Parameters as well as form of magnets can be calculated on our force calculator.

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Physical properties - UMGW 16x13x5 [M4] GW / N38 - magnetic holder internal thread

Specification / characteristics - UMGW 16x13x5 [M4] GW / N38 - magnetic holder internal thread

properties
properties values
Cat. no. 180315
GTIN/EAN 5906301813712
Production/Distribution Dhit sp. z o.o.
ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin Poland / China / Germany
Customs code 85059029
Diameter Ø 16 mm [±1 mm]
Height 13 mm [±1 mm]
Height 5 mm [±1 mm]
Weight 6.6 g
Load capacity ~ ? 5.00 kg / 49.03 N
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMGW 16x13x5 [M4] GW / N38 - magnetic holder internal thread
properties values units
remenance Br [min. - max.] ? 12.2-12.6 kGs
remenance Br [min. - max.] ? 1220-1260 mT
coercivity bHc ? 10.8-11.5 kOe
coercivity bHc ? 860-915 kA/m
actual internal force iHc ≥ 12 kOe
actual internal force iHc ≥ 955 kA/m
energy density [min. - max.] ? 36-38 BH max MGOe
energy density [min. - max.] ? 287-303 BH max KJ/m
max. temperature ? ≤ 80 °C

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C
properties values units
Vickers hardness ≥550 Hv
Density ≥7.4 g/cm3
Curie Temperature TC 312 - 380 °C
Curie Temperature TF 593 - 716 °F
Specific resistance 150 μΩ⋅cm
Bending strength 250 MPa
Compressive strength 1000~1100 MPa
Thermal expansion parallel (∥) to orientation (M) (3-4) x 10-6 °C-1
Thermal expansion perpendicular (⊥) to orientation (M) -(1-3) x 10-6 °C-1
Young's modulus 1.7 x 104 kg/mm²
Engineering data and GPSR
Chemical composition
iron (Fe) 64% – 68%
neodymium (Nd) 29% – 32%
boron (B) 1.1% – 1.2%
dysprosium (Dy) 0.5% – 2.0%
coating (Ni-Cu-Ni) < 0.05%
Sustainability
recyclability (EoL) 100%
recycled raw materials ~10% (pre-cons)
carbon footprint low / zredukowany
waste code (EWC) 16 02 16
Safety card (GPSR)
responsible entity
Dhit sp. z o.o.
ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki
tel: +48 22 499 98 98 | e-mail: bok@dhit.pl
batch number/type
id: 180315-2026
Measurement Calculator
Force (pull)
Field Strength
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The steel housing shields the magnetic field from the sides and top, directing all its power downwards (to the active side). Thanks to this, the holder is more durable, resistant, and safer to mount. The threaded hole allows creating a functional mounting point in seconds.
The most important rule is choosing the appropriate length of the screw being screwed in. Neodymium magnets are brittle, and direct pressure from a screw can cause them to crack or detach. You can use a spacer washer or lock nut to limit screwing depth.
They are used for fixing sensors, lamps, rating plates, machine guards, and installations. They allow mounting without drilling in steel substrate, which is crucial in rented spaces. Ideal for fixing lighting on machine tools and welding tables.
This value applies to perfect adherence with the entire magnet surface. Air gap (rust, paint, dirt) also drastically lowers holding power. For side detachment (sliding), the force is only approx. 1/3 of nominal capacity.
Standard coating effectively protects against moisture in indoor conditions. In rain and frost, the coating may degrade over time if not protected. The neodymium magnet itself inside is also nickel-plated.

Advantages and disadvantages of rare earth magnets.

Strengths

Apart from their notable magnetic energy, neodymium magnets have these key benefits:
  • Their power remains stable, and after around 10 years it drops only by ~1% (theoretically),
  • Neodymium magnets are distinguished by extremely resistant to loss of magnetic properties caused by external magnetic fields,
  • By applying a smooth coating of nickel, the element presents an proper look,
  • Magnets are characterized by huge magnetic induction on the surface,
  • Through (adequate) combination of ingredients, they can achieve high thermal resistance, allowing for functioning at temperatures approaching 230°C and above...
  • Possibility of custom machining as well as optimizing to concrete requirements,
  • Universal use in modern industrial fields – they are commonly used in data components, electric drive systems, medical equipment, as well as other advanced devices.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which makes them useful in miniature devices

Cons

Drawbacks and weaknesses of neodymium magnets: application proposals
  • At strong impacts they can crack, therefore we advise placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
  • Neodymium magnets decrease their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
  • Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
  • We suggest cover - magnetic holder, due to difficulties in creating nuts inside the magnet and complicated shapes.
  • Potential hazard related to microscopic parts of magnets can be dangerous, in case of ingestion, which becomes key in the aspect of protecting the youngest. Additionally, tiny parts of these products are able to disrupt the diagnostic process medical when they are in the body.
  • High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which hinders application in large quantities

Lifting parameters

Maximum holding power of the magnet – what affects it?

Magnet power was defined for the most favorable conditions, taking into account:
  • with the contact of a yoke made of special test steel, ensuring maximum field concentration
  • with a cross-section of at least 10 mm
  • characterized by lack of roughness
  • under conditions of ideal adhesion (metal-to-metal)
  • for force acting at a right angle (pull-off, not shear)
  • in neutral thermal conditions

Magnet lifting force in use – key factors

Real force is influenced by working environment parameters, mainly (from priority):
  • Clearance – existence of any layer (paint, dirt, air) acts as an insulator, which lowers capacity steeply (even by 50% at 0.5 mm).
  • Force direction – remember that the magnet has greatest strength perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the nominal value.
  • Substrate thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet limits the attraction force (the magnet "punches through" it).
  • Steel grade – the best choice is high-permeability steel. Stainless steels may attract less.
  • Smoothness – full contact is possible only on smooth steel. Rough texture create air cushions, reducing force.
  • Heat – NdFeB sinters have a negative temperature coefficient. At higher temperatures they are weaker, and at low temperatures gain strength (up to a certain limit).

Lifting capacity was measured with the use of a smooth steel plate of optimal thickness (min. 20 mm), under vertically applied force, however under parallel forces the lifting capacity is smaller. Additionally, even a small distance between the magnet’s surface and the plate reduces the lifting capacity.

H&S for magnets
Warning for allergy sufferers

Nickel alert: The nickel-copper-nickel coating contains nickel. If redness appears, immediately stop handling magnets and wear gloves.

Bodily injuries

Mind your fingers. Two powerful magnets will join instantly with a force of massive weight, crushing anything in their path. Exercise extreme caution!

Safe distance

Equipment safety: Neodymium magnets can damage payment cards and delicate electronics (pacemakers, hearing aids, mechanical watches).

Power loss in heat

Monitor thermal conditions. Exposing the magnet above 80 degrees Celsius will permanently weaken its properties and strength.

Risk of cracking

Protect your eyes. Magnets can fracture upon violent connection, ejecting shards into the air. Wear goggles.

This is not a toy

Always store magnets away from children. Choking hazard is significant, and the consequences of magnets clamping inside the body are fatal.

Fire risk

Powder generated during cutting of magnets is self-igniting. Do not drill into magnets without proper cooling and knowledge.

Immense force

Handle with care. Neodymium magnets act from a distance and snap with huge force, often faster than you can react.

Implant safety

Patients with a heart stimulator should maintain an absolute distance from magnets. The magnetic field can disrupt the functioning of the life-saving device.

GPS Danger

Navigation devices and smartphones are highly susceptible to magnetism. Close proximity with a strong magnet can decalibrate the sensors in your phone.

Important! Details about risks in the article: Safety of working with magnets.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98