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neodymium magnets

We provide red color magnetic Nd2Fe14B - our store's offer. All "magnets" in our store are available for immediate delivery (check the list). Check out the magnet pricing for more details see the magnet price list

Magnet for treasure hunters F300 GOLD

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Holders with magnets can be used to improve production processes, underwater exploration, or searching for meteors from gold more information...

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SM 18x150 [2xM5] / N42 - magnetic separator

magnetic separator

Catalog no 130271

GTIN: 5906301812739

0

Diameter Ø [±0,1 mm]

18 mm

Height [±0,1 mm]

150 mm

Weight

0.01 g

332.10 with VAT / pcs + price for transport

270.00 ZŁ net + 23% VAT / pcs

bulk discounts:

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price from 1 pcs
270.00 ZŁ
332.10 ZŁ
price from 10 pcs
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price from 20 pcs
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298.89 ZŁ

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Force along with shape of neodymium magnets can be checked with our force calculator.

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SM 18x150 [2xM5] / N42 - magnetic separator
Specification/characteristics SM 18x150 [2xM5] / N42 - magnetic separator
properties
values
Cat. no.
130271
GTIN
5906301812739
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
18 mm [±0,1 mm]
Height
150 mm [±0,1 mm]
Weight
0.01 g [±0,1 mm]
Manufacturing Tolerance
± 0.1 mm

Magnetic properties of material N42

properties
values
units
remenance Br [Min. - Max.] ?
12.9-13.2
kGs
remenance Br [Min. - Max.] ?
1290-1320
T
coercivity bHc ?
10.8-12.0
kOe
coercivity bHc ?
860-955
kA/m
actual internal force iHc
≥ 12
kOe
actual internal force iHc
≥ 955
kA/m
energy density [Min. - Max.] ?
40-42
BH max MGOe
energy density [Min. - Max.] ?
318-334
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

A magnetic rod is the basic element of building grate separators and magnetic filters. It is mounted in chutes, hoppers, and pipelines to protect production machines from failure. Thanks to the use of strong neodymium magnets, the rod catches even metallic dust.
The construction relies on a sealed, welded stainless steel housing, polished smooth. Inside there is a stack of strong neodymium magnets arranged in a special configuration (magnetic circuit). Such construction ensures full resistance to corrosion, water, oils, and acids.
Metal filings stick to the surface very strongly, so cleaning requires strength or cleverness. We recommend sticking packing tape to the cluster of filings and tearing it off together with the contaminants. In industry, cover tubes (so-called Easy Clean system) are used, from which the magnetic insert slides out.
The Gauss value tells us how effectively and deeply the magnet will catch contaminants. The economical version (8kGs) handles large pieces of metal perfectly. High Power versions (~12000-14000 Gs) are necessary for catching metallic dust, oxides, and stainless steel after processing.
We fulfill individual orders for bars perfectly matched to your machine or separator. You can choose a mounting method consistent with your technical design. We ensure fast realization of special orders and technical advice.

Advantages as well as disadvantages of NdFeB magnets.

Apart from their consistent magnetism, neodymium magnets have these key benefits:

  • Their magnetic field is maintained, and after approximately 10 years it decreases only by ~1% (according to research),
  • They maintain their magnetic properties even under external field action,
  • Thanks to the reflective finish, the coating of nickel, gold, or silver gives an aesthetic appearance,
  • The surface of neodymium magnets generates a powerful magnetic field – this is one of their assets,
  • Through (adequate) combination of ingredients, they can achieve high thermal strength, enabling operation at temperatures reaching 230°C and above...
  • Possibility of custom creating and optimizing to specific conditions,
  • Universal use in electronics industry – they serve a role in mass storage devices, electromotive mechanisms, advanced medical instruments, also other advanced devices.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Characteristics of disadvantages of neodymium magnets: tips and applications.

  • Brittleness is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a special holder, which not only secures them against impacts but also increases their durability
  • Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of strength (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
  • Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
  • Limited possibility of creating threads in the magnet and complicated shapes - preferred is cover - magnetic holder.
  • Health risk to health – tiny shards of magnets are risky, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. Additionally, small components of these products are able to complicate diagnosis medical when they are in the body.
  • With budget limitations the cost of neodymium magnets can be a barrier,

Breakaway strength of the magnet in ideal conditionswhat affects it?

Breakaway force is the result of a measurement for the most favorable conditions, assuming:

  • with the application of a yoke made of low-carbon steel, guaranteeing full magnetic saturation
  • possessing a thickness of minimum 10 mm to avoid saturation
  • with an ideally smooth contact surface
  • under conditions of ideal adhesion (metal-to-metal)
  • for force applied at a right angle (in the magnet axis)
  • at temperature approx. 20 degrees Celsius

Practical aspects of lifting capacity – factors

In practice, the actual lifting capacity is determined by many variables, ranked from the most important:

  • Air gap (betwixt the magnet and the metal), as even a very small distance (e.g. 0.5 mm) leads to a drastic drop in force by up to 50% (this also applies to paint, rust or debris).
  • Force direction – catalog parameter refers to detachment vertically. When slipping, the magnet exhibits much less (typically approx. 20-30% of nominal force).
  • Wall thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of converting into lifting capacity.
  • Material composition – not every steel attracts identically. Alloy additives worsen the interaction with the magnet.
  • Base smoothness – the more even the plate, the larger the contact zone and higher the lifting capacity. Unevenness creates an air distance.
  • Heat – NdFeB sinters have a negative temperature coefficient. At higher temperatures they are weaker, and in frost gain strength (up to a certain limit).

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

Safe handling of neodymium magnets

Phone sensors

Remember: rare earth magnets generate a field that interferes with sensitive sensors. Keep a separation from your mobile, device, and GPS.

Swallowing risk

Neodymium magnets are not intended for children. Eating several magnets can lead to them connecting inside the digestive tract, which constitutes a critical condition and necessitates immediate surgery.

Warning for allergy sufferers

Medical facts indicate that nickel (the usual finish) is a potent allergen. If you have an allergy, prevent direct skin contact or opt for versions in plastic housing.

Handling rules

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

Dust explosion hazard

Fire warning: Neodymium dust is explosive. Do not process magnets without safety gear as this may cause fire.

Material brittleness

Neodymium magnets are ceramic materials, meaning they are prone to chipping. Collision of two magnets will cause them breaking into shards.

Maximum temperature

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

Keep away from computers

Data protection: Neodymium magnets can ruin data carriers and delicate electronics (pacemakers, medical aids, mechanical watches).

Medical interference

Individuals with a pacemaker must maintain an large gap from magnets. The magnetism can stop the functioning of the life-saving device.

Hand protection

Risk of injury: The attraction force is so great that it can cause hematomas, pinching, and even bone fractures. Protective gloves are recommended.

Caution!

Learn more about risks in the article: Magnet Safety Guide.

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98