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UMGGW 22x6 [M4] GW / N38 - magnetic holder rubber internal thread

magnetic holder rubber internal thread

Catalog no 160304

GTIN/EAN: 5906301813620

5.00

Diameter Ø

22 mm [±1 mm]

Height

6 mm [±1 mm]

Weight

12 g

Load capacity

5.10 kg / 50.01 N

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7.38 ZŁ with VAT / pcs + price for transport

6.00 ZŁ net + 23% VAT / pcs

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Physical properties - UMGGW 22x6 [M4] GW / N38 - magnetic holder rubber internal thread

Specification / characteristics - UMGGW 22x6 [M4] GW / N38 - magnetic holder rubber internal thread

properties
properties values
Cat. no. 160304
GTIN/EAN 5906301813620
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 22 mm [±1 mm]
Height 6 mm [±1 mm]
Weight 12 g
Load capacity ~ ? 5.10 kg / 50.01 N
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMGGW 22x6 [M4] GW / N38 - magnetic holder rubber 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
Technical and environmental data
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: 160304-2026
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Pulling force
Field Strength
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Magnets in rubber were created for non-invasive mounting on delicate painted surfaces, such as car bodies or machine casings. They are commonly used in the advertising industry (car wrapping, foil fixing), lighting (LED work lamps), and mobile monitoring. The internal threaded bushing allows easy screwing of any element, creating a solid mounting point without drilling holes in the sheet metal.
Yes, thanks to the hermetic rubber coating, these magnets are fully waterproof and protected against corrosion. Santoprene rubber does not rot in the sun and retains flexibility even during frosts, guaranteeing durability. This is the best choice for mounting on a car roof, because you can be sure that rusty stains will not appear on the paint after rain.
Although rubber creates a small distance reducing perpendicular pull-off force, it drastically increases resistance when trying to slide the magnet across the surface. This prevents lamps or antennas from sliding down during braking or sudden maneuvers. They ensure maximum stability of mounting under vibrations, which is crucial in transport and automotive.
You can screw any metric bolt, hook, handle, cable holder into the magnet or screw the device housing directly. Just remember to choose the appropriate screw length – too long can push the rubber from the bottom and damage the paint.
Such an arrangement makes the field very strong right at the rubber (high lifting capacity) but quickly fades with distance. This is much safer for electronics inside the vehicle (e.g., under the roof) compared to regular magnets.

Advantages as well as disadvantages of Nd2Fe14B magnets.

Advantages

Apart from their consistent magnetism, neodymium magnets have these key benefits:
  • They virtually do not lose power, because even after 10 years the decline in efficiency is only ~1% (according to literature),
  • Magnets very well protect themselves against loss of magnetization caused by external fields,
  • Thanks to the shiny finish, the layer of nickel, gold-plated, or silver-plated gives an aesthetic appearance,
  • Neodymium magnets achieve maximum magnetic induction on a contact point, which increases force concentration,
  • Through (adequate) combination of ingredients, they can achieve high thermal strength, enabling action at temperatures approaching 230°C and above...
  • In view of the potential of flexible shaping and adaptation to unique needs, NdFeB magnets can be manufactured in a broad palette of forms and dimensions, which makes them more universal,
  • Significant place in advanced technology sectors – they are used in computer drives, motor assemblies, precision medical tools, as well as industrial machines.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which enables their usage in small systems

Limitations

Disadvantages of NdFeB magnets:
  • They are prone to damage upon heavy impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only protects the magnet but also improves its resistance to damage
  • Neodymium magnets decrease their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. 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 while using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
  • Limited ability of making threads in the magnet and complicated forms - preferred is cover - magnetic holder.
  • Potential hazard to health – tiny shards of magnets can be dangerous, if swallowed, which becomes key in the context of child safety. Furthermore, small elements of these products are able to be problematic in diagnostics medical when they are in the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Pull force analysis

Detachment force of the magnet in optimal conditions – what it depends on?

Information about lifting capacity was defined for the most favorable conditions, taking into account:
  • using a base made of low-carbon steel, acting as a magnetic yoke
  • with a cross-section minimum 10 mm
  • with an ideally smooth touching surface
  • under conditions of ideal adhesion (metal-to-metal)
  • during pulling in a direction vertical to the plane
  • at ambient temperature approx. 20 degrees Celsius

Lifting capacity in real conditions – factors

In practice, the real power is determined by a number of factors, listed from the most important:
  • Clearance – the presence of foreign body (rust, tape, gap) interrupts the magnetic circuit, which lowers power rapidly (even by 50% at 0.5 mm).
  • Loading method – declared lifting capacity refers to pulling vertically. When slipping, the magnet holds significantly lower power (often approx. 20-30% of nominal force).
  • Element thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
  • Material composition – not every steel attracts identically. High carbon content worsen the interaction with the magnet.
  • Surface structure – the smoother and more polished the surface, the better the adhesion and higher the lifting capacity. Unevenness creates an air distance.
  • Temperature influence – high temperature reduces pulling force. Too high temperature can permanently demagnetize the magnet.

Holding force was checked on the plate surface of 20 mm thickness, when a perpendicular force was applied, whereas under attempts to slide the magnet the load capacity is reduced by as much as 75%. Additionally, even a slight gap between the magnet’s surface and the plate decreases the load capacity.

Precautions when working with neodymium magnets
Data carriers

Very strong magnetic fields can corrupt files on payment cards, hard drives, and other magnetic media. Stay away of min. 10 cm.

Medical implants

Individuals with a heart stimulator must keep an large gap from magnets. The magnetism can interfere with the operation of the life-saving device.

Product not for children

Only for adults. Tiny parts pose a choking risk, causing serious injuries. Keep out of reach of kids and pets.

Maximum temperature

Avoid heat. Neodymium magnets are sensitive to heat. If you require operation above 80°C, look for HT versions (H, SH, UH).

Fire risk

Fire warning: Rare earth powder is highly flammable. Do not process magnets without safety gear as this risks ignition.

Handling guide

Handle magnets with awareness. Their huge power can shock even professionals. Stay alert and respect their power.

Eye protection

Neodymium magnets are ceramic materials, meaning they are prone to chipping. Impact of two magnets leads to them cracking into shards.

Nickel coating and allergies

Medical facts indicate that nickel (the usual finish) is a potent allergen. If your skin reacts to metals, prevent direct skin contact or opt for encased magnets.

Crushing force

Large magnets can smash fingers in a fraction of a second. Never put your hand between two attracting surfaces.

Keep away from electronics

Note: rare earth magnets generate a field that confuses precision electronics. Keep a separation from your mobile, tablet, and navigation systems.

Safety First! Details about hazards in the article: Magnet Safety Guide.