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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

7.38 with VAT / pcs + price for transport

6.00 ZŁ net + 23% VAT / pcs

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Technical data - 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
Engineering data and GPSR
Material specification
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%
Environmental data
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: 160304-2025
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Force (pull)

Magnetic Induction

Other deals

Thanks to the use of soft Santoprene rubber coating, these holders do not scratch paint and ensure excellent grip even on slippery surfaces. They are standard in the advertising industry (car wrapping, foil fixing), lighting (LED work lamps), and mobile monitoring. The internal threaded bushing allows quick mounting of any element, creating a solid mounting point without drilling holes in the sheet metal.
Full rubberizing effectively isolates the magnetic system from moisture, road salt, and dirt, making them an ideal solution for outdoor applications. Santoprene rubber does not rot in the sun and retains flexibility even during frosts, guaranteeing long life. This is the recommended 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.
The holder is equipped with a steel bushing with an internal thread (you will find the thread size in the product name, e.g., M4, M6, M8). 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. Thanks to this, the magnet holds the sheet metal strongly but does not disturb devices in the cabin or attract metal objects from afar.

Advantages as well as disadvantages of Nd2Fe14B magnets.

Benefits

In addition to their magnetic capacity, neodymium magnets provide the following advantages:
  • They have unchanged lifting capacity, and over nearly 10 years their performance decreases symbolically – ~1% (according to theory),
  • They possess excellent resistance to magnetism drop as a result of opposing magnetic fields,
  • Thanks to the smooth finish, the surface of nickel, gold, or silver gives an elegant appearance,
  • Magnets are distinguished by very high magnetic induction on the outer side,
  • Through (appropriate) combination of ingredients, they can achieve high thermal strength, enabling action at temperatures approaching 230°C and above...
  • Possibility of individual forming and modifying to atypical requirements,
  • Key role in modern industrial fields – they serve a role in HDD drives, electric drive systems, precision medical tools, as well as modern systems.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in small dimensions, which makes them useful in small systems

Limitations

Disadvantages of NdFeB magnets:
  • At very strong impacts they can break, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
  • Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
  • 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
  • We recommend cover - magnetic mechanism, due to difficulties in producing nuts inside the magnet and complicated forms.
  • Potential hazard resulting from small fragments of magnets are risky, when accidentally swallowed, which becomes key in the context of child safety. It is also worth noting that small elements of these products can complicate diagnosis medical in case of swallowing.
  • Due to neodymium price, their price is relatively high,

Pull force analysis

Highest magnetic holding forcewhat affects it?

Magnet power is the result of a measurement for ideal contact conditions, assuming:
  • with the contact of a sheet made of low-carbon steel, guaranteeing maximum field concentration
  • with a cross-section of at least 10 mm
  • with an ideally smooth contact surface
  • with zero gap (without impurities)
  • during pulling in a direction vertical to the mounting surface
  • at ambient temperature approx. 20 degrees Celsius

Lifting capacity in practice – influencing factors

During everyday use, the actual lifting capacity depends on many variables, presented from most significant:
  • Air gap (between the magnet and the plate), because even a very small distance (e.g. 0.5 mm) results in a reduction in force by up to 50% (this also applies to paint, rust or dirt).
  • Pull-off angle – note that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the nominal value.
  • Metal thickness – thin material does not allow full use of the magnet. Magnetic flux penetrates through instead of converting into lifting capacity.
  • Material type – ideal substrate is high-permeability steel. Cast iron may attract less.
  • Surface quality – the more even the plate, the better the adhesion and stronger the hold. Unevenness creates an air distance.
  • Operating temperature – neodymium magnets have a negative temperature coefficient. At higher temperatures they are weaker, and in frost they can be stronger (up to a certain limit).

Holding force was tested on the plate surface of 20 mm thickness, when a perpendicular force was applied, however under parallel forces the load capacity is reduced by as much as 5 times. Additionally, even a slight gap between the magnet’s surface and the plate decreases the load capacity.

Precautions when working with NdFeB magnets
Metal Allergy

It is widely known that the nickel plating (standard magnet coating) is a common allergen. For allergy sufferers, prevent direct skin contact and select encased magnets.

Keep away from electronics

Be aware: neodymium magnets produce a field that confuses precision electronics. Keep a safe distance from your mobile, device, and navigation systems.

Permanent damage

Watch the temperature. Exposing the magnet above 80 degrees Celsius will destroy its magnetic structure and pulling force.

Crushing force

Large magnets can smash fingers in a fraction of a second. Do not place your hand between two attracting surfaces.

Mechanical processing

Fire hazard: Rare earth powder is highly flammable. Do not process magnets without safety gear as this may cause fire.

Conscious usage

Handle with care. Rare earth magnets attract from a long distance and connect with huge force, often faster than you can react.

Magnetic media

Avoid bringing magnets close to a wallet, laptop, or screen. The magnetic field can destroy these devices and erase data from cards.

Do not give to children

Always store magnets out of reach of children. Ingestion danger is significant, and the effects of magnets connecting inside the body are very dangerous.

Protective goggles

NdFeB magnets are ceramic materials, meaning they are prone to chipping. Collision of two magnets will cause them breaking into small pieces.

Warning for heart patients

Medical warning: Strong magnets can deactivate pacemakers and defibrillators. Do not approach if you have medical devices.

Security! Learn more about hazards in the article: Magnet Safety Guide.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98