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neodymium magnets

We provide red color magnets Nd2Fe14B - our proposal. Practically all "neodymium magnets" in our store are in stock for immediate purchase (check the list). Check out the magnet price list for more details check the magnet price list

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UMGGZ 88x8.5 [M8] GZ / N38 - rubber magnetic holder external thread

rubber magnetic holder external thread

Catalog no 340313

GTIN: 5906301814757

5.00

Diameter Ø

88 mm [±1 mm]

Height

8.5 mm [±1 mm]

Weight

193 g

Load capacity

42.90 kg / 420.71 N

40.59 with VAT / pcs + price for transport

33.00 ZŁ net + 23% VAT / pcs

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UMGGZ 88x8.5 [M8] GZ / N38 - rubber magnetic holder external thread

Specification / characteristics UMGGZ 88x8.5 [M8] GZ / N38 - rubber magnetic holder external thread

properties
properties values
Cat. no. 340313
GTIN 5906301814757
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 193 g
Load capacity ~ ? 42.90 kg / 420.71 N
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMGGZ 88x8.5 [M8] GZ / N38 - rubber magnetic holder external thread
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

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
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Magnet Pull Force

Magnetic Field

Other deals

The protruding thread allows instant screwing of a lamp or holder using a nut. Thanks to the rubber coating, the magnet is waterproof and does not scratch paint, which is crucial in automotive.
It can be safely used outdoors all year round, in rain, snow, and frost. Guarantees no rusty stains on the paint, which happen with regular magnets.
Soft rubber provides a barrier between the hard magnet and the paint, eliminating the risk of scratches. However, it is worth remembering to wipe the roof of dust and sand before mounting so that it does not get under the magnet.
The magnet has a permanently built-in stud with a metric thread (usually M4, M6, or M8). It is a solid threaded connection made of galvanized steel, resistant to breaking.
Rubber creates a distance between the magnet and metal, which slightly reduces perpendicular attraction force but drastically increases friction force. Holding force depends on the roof sheet thickness.

Pros and cons of NdFeB magnets.

Advantages
Besides their exceptional magnetic power, neodymium magnets offer the following advantages:
  • They do not lose strength, even during nearly 10 years – the decrease in lifting capacity is only ~1% (according to tests),
  • Neodymium magnets are extremely resistant to demagnetization caused by external magnetic fields,
  • By applying a decorative layer of gold, the element presents an modern look,
  • Magnets are distinguished by impressive magnetic induction on the outer layer,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Possibility of individual creating as well as adapting to complex conditions,
  • Significant place in advanced technology sectors – they find application in hard drives, electric drive systems, medical devices, as well as modern systems.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications
Disadvantages
What to avoid - cons of neodymium magnets: application proposals
  • They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only shields 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 power. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
  • Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material stable to moisture, when using outdoors
  • Due to limitations in creating threads and complex shapes in magnets, we recommend using cover - magnetic mount.
  • Possible danger related to microscopic parts of magnets are risky, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. It is also worth noting that tiny parts of these magnets are able to be problematic in diagnostics medical in case of swallowing.
  • High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which can limit application in large quantities

Holding force characteristics

Highest magnetic holding forcewhat it depends on?
Information about lifting capacity was determined for the most favorable conditions, assuming:
  • on a block made of structural steel, perfectly concentrating the magnetic field
  • with a thickness minimum 10 mm
  • with an ground touching surface
  • under conditions of ideal adhesion (metal-to-metal)
  • under axial application of breakaway force (90-degree angle)
  • at standard ambient temperature
Practical lifting capacity: influencing factors
In real-world applications, the real power is determined by several key aspects, ranked from most significant:
  • Gap (between the magnet and the plate), since even a microscopic clearance (e.g. 0.5 mm) can cause a decrease in force by up to 50% (this also applies to paint, rust or dirt).
  • Angle of force application – maximum parameter is reached only during perpendicular pulling. The shear force of the magnet along the plate is usually many times smaller (approx. 1/5 of the lifting capacity).
  • Base massiveness – too thin steel causes magnetic saturation, causing part of the flux to be escaped to the other side.
  • Steel grade – the best choice is high-permeability steel. Stainless steels may have worse magnetic properties.
  • Surface quality – the smoother and more polished the plate, the larger the contact zone and stronger the hold. Roughness creates an air distance.
  • Thermal environment – temperature increase results in weakening of force. It is worth remembering the thermal limit for a given model.

Lifting capacity testing was performed on a smooth plate of suitable thickness, under a perpendicular pulling force, in contrast under attempts to slide the magnet the load capacity is reduced by as much as 75%. In addition, even a slight gap between the magnet and the plate reduces the lifting capacity.

Safety rules for work with neodymium magnets
Phone sensors

GPS units and smartphones are extremely susceptible to magnetic fields. Direct contact with a strong magnet can decalibrate the internal compass in your phone.

Physical harm

Large magnets can break fingers in a fraction of a second. Do not put your hand betwixt two attracting surfaces.

Magnet fragility

Neodymium magnets are sintered ceramics, meaning they are very brittle. Collision of two magnets leads to them breaking into small pieces.

Flammability

Fire hazard: Neodymium dust is highly flammable. Do not process magnets in home conditions as this risks ignition.

Safe distance

Avoid bringing magnets near a purse, computer, or screen. The magnetism can destroy these devices and erase data from cards.

Danger to the youngest

Strictly store magnets away from children. Ingestion danger is significant, and the consequences of magnets connecting inside the body are fatal.

Health Danger

Warning for patients: Strong magnetic fields affect medical devices. Keep minimum 30 cm distance or request help to work with the magnets.

Allergy Warning

Certain individuals suffer from a sensitization to Ni, which is the common plating for neodymium magnets. Frequent touching can result in an allergic reaction. We recommend wear protective gloves.

Respect the power

Exercise caution. Neodymium magnets attract from a long distance and connect with huge force, often quicker than you can move away.

Maximum temperature

Monitor thermal conditions. Heating the magnet to high heat will ruin its properties and strength.

Important! Want to know more? Read our article: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98