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UMGGW 88x8.5 [M6] GW / N38 - magnetic holder rubber internal thread

magnetic holder rubber internal thread

Catalog no 160309

GTIN/EAN: 5906301813675

5.00

Diameter Ø

88 mm [±1 mm]

Height

8.5 mm [±1 mm]

Weight

186 g

Load capacity

42.90 kg / 420.71 N

technical parameters »

40.59 ZŁ with VAT / pcs + price for transport

33.00 ZŁ net + 23% VAT / pcs

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Carbon Footprint – environmental impact GPSR Regulation – product safety
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Pick up the phone and ask +48 22 499 98 98 alternatively let us know using our online form the contact section.
Strength along with structure of magnetic components can be calculated using our online calculation tool.

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Detailed specification - UMGGW 88x8.5 [M6] GW / N38 - magnetic holder rubber internal thread

Specification / characteristics - UMGGW 88x8.5 [M6] GW / N38 - magnetic holder rubber internal thread

properties
properties values
Cat. no. 160309
GTIN/EAN 5906301813675
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 88 mm [±1 mm]
Height 8.5 mm [±1 mm]
Weight 186 g
Load capacity ~ ? 42.90 kg / 420.71 N
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMGGW 88x8.5 [M6] 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
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: 160309-2026
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Thanks to the use of flexible Santoprene rubber coating, these holders do not scratch paint and ensure excellent grip even on slippery surfaces. Used for mounting taxi beacons, antennas, cameras, and license plates at rallies, where quick disassembly counts. 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 tight rubber coating, these magnets are fully waterproof and protected against corrosion. They can be safely used outdoors all year round, maintaining their properties in a wide temperature range. 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. Thanks to this, these magnets hold onto the car roof excellently even at high speeds and wind resistance. They ensure safety 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. This enables quick creation of a magnetic base for work lighting, reversing cameras, sensors, or advertising boards.
Most rubberized holders use a special multi-pole system (often close to a Halbach array) on a steel base. 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.

Strengths

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • Their power is maintained, and after around 10 years it decreases only by ~1% (theoretically),
  • Magnets effectively protect themselves against demagnetization caused by external fields,
  • In other words, due to the smooth layer of nickel, the element gains a professional look,
  • Magnets are distinguished by very high magnetic induction on the outer layer,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
  • In view of the ability of free shaping and customization to individualized requirements, magnetic components can be produced in a variety of geometric configurations, which expands the range of possible applications,
  • Fundamental importance in innovative solutions – they serve a role in mass storage devices, brushless drives, advanced medical instruments, and industrial machines.
  • Relatively small size with high pulling force – neodymium magnets offer high power in small dimensions, which makes them useful in small systems

Disadvantages

Disadvantages of neodymium magnets:
  • At strong impacts they can break, therefore we recommend placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • Neodymium magnets decrease their strength 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 stability even at temperatures up to 230°C
  • Magnets exposed to a humid environment can rust. Therefore when using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
  • We recommend casing - magnetic mount, due to difficulties in producing nuts inside the magnet and complex forms.
  • Potential hazard to health – tiny shards of magnets are risky, when accidentally swallowed, which is particularly important in the context of child safety. Furthermore, tiny parts of these products can complicate diagnosis medical after entering the body.
  • With large orders the cost of neodymium magnets can be a barrier,

Lifting parameters

Best holding force of the magnet in ideal parameters – what affects it?

Holding force of 42.90 kg is a measurement result conducted under the following configuration:
  • on a plate made of structural steel, perfectly concentrating the magnetic flux
  • possessing a thickness of min. 10 mm to avoid saturation
  • with a surface cleaned and smooth
  • without the slightest air gap between the magnet and steel
  • under axial force vector (90-degree angle)
  • at temperature approx. 20 degrees Celsius

Determinants of lifting force in real conditions

During everyday use, the actual lifting capacity is determined by several key aspects, ranked from the most important:
  • Distance (between the magnet and the plate), since even a very small distance (e.g. 0.5 mm) leads to a reduction in force by up to 50% (this also applies to varnish, corrosion or dirt).
  • Loading method – declared lifting capacity refers to pulling vertically. When applying parallel force, the magnet holds significantly lower power (often approx. 20-30% of nominal force).
  • Substrate thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
  • Metal type – not every steel reacts the same. High carbon content worsen the attraction effect.
  • Base smoothness – the more even the surface, the larger the contact zone and higher the lifting capacity. Unevenness creates an air distance.
  • Heat – neodymium magnets have a negative temperature coefficient. When it is hot they are weaker, and in frost they can be stronger (up to a certain limit).

Holding force was measured on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, in contrast under attempts to slide the magnet the holding force is lower. In addition, even a small distance between the magnet’s surface and the plate lowers the lifting capacity.

H&S for magnets
GPS and phone interference

Navigation devices and smartphones are extremely sensitive to magnetic fields. Direct contact with a strong magnet can ruin the internal compass in your phone.

Caution required

Be careful. Rare earth magnets act from a distance and snap with huge force, often faster than you can move away.

Heat warning

Standard neodymium magnets (grade N) lose magnetization when the temperature surpasses 80°C. This process is irreversible.

Avoid contact if allergic

A percentage of the population suffer from a contact allergy to nickel, which is the typical protective layer for neodymium magnets. Frequent touching may cause a rash. It is best to use protective gloves.

Crushing risk

Risk of injury: The attraction force is so great that it can result in hematomas, pinching, and broken bones. Protective gloves are recommended.

Electronic hazard

Avoid bringing magnets close to a wallet, computer, or TV. The magnetism can permanently damage these devices and erase data from cards.

Pacemakers

For implant holders: Strong magnetic fields disrupt electronics. Keep at least 30 cm distance or ask another person to work with the magnets.

Material brittleness

Neodymium magnets are sintered ceramics, meaning they are fragile like glass. Collision of two magnets will cause them breaking into small pieces.

Mechanical processing

Combustion risk: Neodymium dust is highly flammable. Avoid machining magnets in home conditions as this may cause fire.

Product not for children

Only for adults. Small elements pose a choking risk, causing severe trauma. Keep away from kids and pets.

Safety First! Want to know more? Read our article: Are neodymium magnets dangerous?