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neodymium magnets

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KM HF - 22 kg - magnetic bracket

magnetic bracket

Catalog no 170257

GTIN: 5906301813699

5

Weight

593 g

Load capacity

22 kg / 215.75 N

29.52 with VAT / pcs + price for transport

24.00 ZŁ net + 23% VAT / pcs

bulk discounts:

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Parameters as well as appearance of neodymium magnets can be calculated on our force calculator.

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KM HF - 22 kg - magnetic bracket

Specification/characteristics KM HF - 22 kg - magnetic bracket
properties
values
Cat. no.
170257
GTIN
5906301813699
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Weight
593 g [±0,1 mm]
Load capacity ~ ?
22 kg / 215.75 N
Manufacturing Tolerance
± 0.1 mm

Magnetic properties of material

properties
values
units

Physical properties of NdFeB

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

Magnetic holders work great for welding with TIG methods, marking, or handling heavy components. Their holding power ranges from 10 to 75 kg, depending on, such as ESAB. Certain versions, e.g., with an integrated switch, enable for quick detachment of the magnet. Advantages of these holders include easy maintenance, long durability, and required versatility.

Advantages as well as disadvantages of neodymium magnets NdFeB.

Besides their durability, neodymium magnets are valued for these benefits:

  • They retain their magnetic properties for around 10 years – the loss is just ~1% (in theory),
  • They show superior resistance to demagnetization from outside magnetic sources,
  • The use of a mirror-like silver surface provides a eye-catching finish,
  • The outer field strength of the magnet shows elevated magnetic properties,
  • These magnets tolerate extreme temperatures, often exceeding 230°C, when properly designed (in relation to profile),
  • Thanks to the freedom in shaping and the capability to adapt to individual requirements, neodymium magnets can be created in diverse shapes and sizes, which broadens their usage potential,
  • Significant impact in cutting-edge sectors – they are utilized in hard drives, rotating machines, healthcare devices and high-tech tools,
  • Relatively small size with high magnetic force – neodymium magnets offer strong power in compact dimensions, which allows for use in small systems

Disadvantages of magnetic elements:

  • They may fracture when subjected to a sudden impact. If the magnets are exposed to mechanical hits, we recommend in a protective case. The steel housing, in the form of a holder, protects the magnet from fracture and additionally increases its overall resistance,
  • High temperatures may significantly reduce the strength of neodymium magnets. Typically, above 80°C, they experience permanent loss in performance (depending on size). To prevent this, we offer heat-resistant magnets marked [AH], capable of working up to 230°C, which makes them perfect for high-temperature use,
  • They rust in a damp environment, especially when used outside, we recommend using sealed magnets, such as those made of polymer,
  • Using a cover – such as a magnetic holder – is advised due to the restrictions in manufacturing threads directly in the magnet,
  • Potential hazard from tiny pieces may arise, when consumed by mistake, which is notable in the context of child safety. Moreover, miniature parts from these magnets have the potential to hinder health screening once in the system,
  • Due to a complex production process, their cost is relatively high,

Breakaway strength of the magnet in ideal conditionswhat affects it?

The given strength of the magnet corresponds to the optimal strength, measured in ideal conditions, that is:

  • with mild steel, serving as a magnetic flux conductor
  • of a thickness of at least 10 mm
  • with a refined outer layer
  • with no separation
  • under perpendicular detachment force
  • in normal thermal conditions

Determinants of lifting force in real conditions

The lifting capacity of a magnet depends on in practice key elements, ordered from most important to least significant:

  • Air gap between the magnet and the plate, since even a very small distance (e.g. 0.5 mm) can cause a drop in lifting force of up to 50%.
  • Direction of applied force, because the maximum lifting capacity is achieved under perpendicular application. The force required to slide the magnet along the plate is usually several times lower.
  • Thickness of the plate, as a plate that is too thin causes part of the magnetic flux not to be used and to remain wasted in the air.
  • Material of the plate, because higher carbon content lowers holding force, while higher iron content increases it. The best choice is steel with high magnetic permeability and high saturation induction.
  • Surface of the plate, because the more smooth and polished it is, the better the contact and consequently the greater the magnetic saturation.
  • Operating temperature, since all permanent magnets have a negative temperature coefficient. This means that at high temperatures they are weaker, while at sub-zero temperatures they become slightly stronger.

* Holding force was measured on the plate surface of 20 mm thickness, when the force acted perpendicularly, whereas under parallel forces the holding force is lower. Moreover, even a minimal clearance {between} the magnet and the plate lowers the holding force.

Exercise Caution with Neodymium Magnets

Dust and powder from neodymium magnets are flammable.

Do not attempt to drill into neodymium magnets. Mechanical processing is also not recommended. If the magnet is crushed into fine powder or dust, it becomes highly flammable.

Neodymium magnets are noted for their fragility, which can cause them to crumble.

Neodymium magnets are characterized by significant fragility. Magnets made of neodymium are made of metal and coated with a shiny nickel, but they are not as durable as steel. At the moment of connection between the magnets, sharp metal fragments can be dispersed in different directions.

People with pacemakers are advised to avoid neodymium magnets.

In the case of neodymium magnets, there is a strong magnetic field. As a result, it interferes with the operation of a heart pacemaker. However, if the magnetic field does not affect the device, it can damage its components or deactivate the device when it is in a magnetic field.

Keep neodymium magnets away from the wallet, computer, and TV.

The strong magnetic field generated by neodymium magnets can damage magnetic media such as floppy disks, video tapes, HDDs, credit cards, magnetic ID cards, cassette tapes, etc. devices. They can also damage devices like video players, televisions, CRT computer monitors. Remember not to place neodymium magnets close to these electronic devices.

Comparing neodymium magnets to ferrite magnets (found in speakers), they are 10 times more powerful, and their power can shock you.

Familiarize yourself with our information to properly handle these magnets and avoid significant swellings to your body and prevent disruption to the magnets.

The magnet is coated with nickel. Therefore, exercise caution if you have an allergy.

Studies show a small percentage of people have allergies to certain metals, including nickel. An allergic reaction often manifests as skin redness and rash. If you have a nickel allergy, you can try wearing gloves or simply avoid direct contact with nickel-plated neodymium magnets.

Neodymium magnets can demagnetize at high temperatures.

Although magnets have shown to retain their effectiveness up to 80°C or 175°F, this temperature may vary depending on the type of material, shape, and intended use of the magnet.

 Maintain neodymium magnets away from children.

Not all neodymium magnets are toys, so do not let children play with them. In such a situation, surgery is necessary to remove them. In the worst case scenario, it can result in death.

Neodymium magnets can attract to each other, pinch the skin, and cause significant swellings.

Magnets will crack or crumble with uncontrolled connecting to each other. You can't approach them to each other. At a distance less than 10 cm you should hold them very firmly.

Keep neodymium magnets as far away as possible from GPS and smartphones.

Neodymium magnets are a source of strong magnetic fields that cause interference with magnetometers and compasses used in navigation, as well as internal compasses of smartphones and GPS devices.

Warning!

Please see the article - What danger lies in neodymium magnets? You will learn how to handle them properly.

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e-mail: bok@dhit.pl

tel: +48 888 99 98 98