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neodymium magnets

We offer yellow color magnetic Nd2Fe14B - our store's offer. Practically all magnesy in our store are in stock for immediate delivery (check the list). See the magnet pricing for more details see the magnet price list

Magnets for treasure hunters F200 GOLD

Where to purchase very strong neodymium magnet? Magnetic holders in airtight and durable steel enclosure are perfect for use in challenging weather conditions, including in the rain and snow see more

magnetic holders

Magnetic holders can be applied to improve production processes, underwater exploration, or locating meteors made of ore read...

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

magnetic holder rubber internal thread

Catalog no 160309

GTIN: 5906301813675

5

Diameter Ø [±0,1 mm]

88 mm

Height [±0,1 mm]

8.5 mm

Weight

186 g

Load capacity

42.9 kg / 420.71 N

40.59 with VAT / pcs + price for transport

33.00 ZŁ net + 23% VAT / pcs

bulk discounts:

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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
values
Cat. no.
160309
GTIN
5906301813675
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
88 mm [±0,1 mm]
Height
8.5 mm [±0,1 mm]
Weight
186 g [±0,1 mm]
Load capacity ~ ?
42.9 kg / 420.71 N
Manufacturing Tolerance
± 0.1 mm

Magnetic properties of material N38

properties
values
units
remenance Br [Min. - Max.] ?
12.2-12.6
kGs
remenance Br [Min. - Max.] ?
1220-1260
T
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

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 106
°C-1
Thermal expansion perpendicular (⊥) to orientation (M)
-(1-3) x 10-6
°C-1
Young's modulus
1.7 x 104
kg/mm²

Shopping tips

Magnets in rubber were created for non-invasive mounting on sensitive 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 tight 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 long life. 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.
Rubber has a very high coefficient of friction, which makes the holder extremely difficult to move sideways (high shear force acts). This prevents lamps or antennas from sliding down during braking or sudden maneuvers. 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.
Inside there are several magnets arranged with alternating poles on a steel plate, which closes the magnetic field close to the surface. This is much safer for electronics inside the vehicle (e.g., under the roof) compared to regular magnets.

Advantages and disadvantages of NdFeB magnets.

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:

  • They retain magnetic properties for around ten years – the loss is just ~1% (in theory),
  • Magnets perfectly defend themselves against loss of magnetization caused by ambient magnetic noise,
  • In other words, due to the metallic surface of nickel, the element becomes visually attractive,
  • Magnets possess very high magnetic induction on the surface,
  • Thanks to resistance to high temperature, they are capable of working (depending on the form) even at temperatures up to 230°C and higher...
  • Possibility of exact forming as well as modifying to defined conditions,
  • Fundamental importance in modern technologies – they are utilized in data components, electric motors, diagnostic systems, and other advanced devices.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in small dimensions, which makes them useful in compact constructions

What to avoid - cons of neodymium magnets: tips and applications.

  • To avoid cracks upon strong impacts, we suggest using special steel holders. Such a solution secures the magnet and simultaneously improves its 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 very resistant to heat
  • Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material stable to moisture, in case of application outdoors
  • We suggest cover - magnetic mechanism, due to difficulties in creating nuts inside the magnet and complex forms.
  • Health risk to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. It is also worth noting that tiny parts of these products are able to complicate diagnosis medical after entering the body.
  • With mass production the cost of neodymium magnets is economically unviable,

Magnetic strength at its maximum – what affects it?

The load parameter shown represents the peak performance, recorded under optimal environment, namely:

  • with the application of a sheet made of low-carbon steel, ensuring maximum field concentration
  • with a cross-section no less than 10 mm
  • with an ground touching surface
  • under conditions of no distance (surface-to-surface)
  • during pulling in a direction vertical to the plane
  • at ambient temperature room level

Determinants of practical lifting force of a magnet

Holding efficiency impacted by working environment parameters, mainly (from most important):

  • Distance – the presence of foreign body (rust, dirt, gap) interrupts the magnetic circuit, which reduces capacity steeply (even by 50% at 0.5 mm).
  • Direction of force – highest force is reached only during pulling at a 90° angle. The shear force of the magnet along the plate is typically several times smaller (approx. 1/5 of the lifting capacity).
  • Metal thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of generating force.
  • Steel type – low-carbon steel gives the best results. Alloy steels decrease magnetic properties and holding force.
  • Base smoothness – the smoother and more polished the plate, the larger the contact zone and stronger the hold. Unevenness acts like micro-gaps.
  • Thermal factor – hot environment reduces pulling force. Too high temperature can permanently demagnetize the magnet.

* Lifting capacity testing was conducted on a smooth plate of optimal thickness, under perpendicular forces, however under parallel forces the lifting capacity is smaller. Moreover, even a small distance {between} the magnet’s surface and the plate reduces the load capacity.

H&S for magnets

Metal Allergy

It is widely known that the nickel plating (the usual finish) is a strong allergen. If your skin reacts to metals, refrain from direct skin contact or choose encased magnets.

Protect data

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

Medical implants

For implant holders: Strong magnetic fields affect medical devices. Maintain at least 30 cm distance or request help to work with the magnets.

Do not overheat magnets

Keep cool. NdFeB magnets are susceptible to heat. If you need operation above 80°C, ask us about special high-temperature series (H, SH, UH).

Adults only

NdFeB magnets are not toys. Swallowing several magnets may result in them attracting across intestines, which poses a critical condition and requires urgent medical intervention.

Safe operation

Use magnets with awareness. Their powerful strength can shock even experienced users. Be vigilant and do not underestimate their power.

Beware of splinters

Neodymium magnets are ceramic materials, which means they are fragile like glass. Impact of two magnets will cause them shattering into shards.

Crushing risk

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

Dust explosion hazard

Machining of neodymium magnets poses a fire hazard. Neodymium dust reacts violently with oxygen and is hard to extinguish.

Magnetic interference

A strong magnetic field disrupts the functioning of magnetometers in phones and navigation systems. Keep magnets close to a smartphone to prevent damaging the sensors.

Security!

Want to know more? Check our post: Why are neodymium magnets dangerous?

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98