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neodymium magnets

We offer blue color magnets Nd2Fe14B - our proposal. All "magnets" in our store are available for immediate purchase (see the list). See the magnet price list for more details see the magnet price list

Magnet for fishing F300 GOLD

Where to buy strong neodymium magnet? Magnet holders in airtight, solid steel casing are perfect for use in challenging weather conditions, including snow and rain read

magnetic holders

Holders with magnets can be used to facilitate manufacturing, underwater exploration, or finding meteors from gold more information...

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BM 450x180x70 [4x M8] - magnetic beam

magnetic beam

Catalog no 090219

GTIN: 5906301812548

5

length [±0,1 mm]

450 mm

Width [±0,1 mm]

180 mm

Height [±0,1 mm]

70 mm

Weight

28900 g

4734.89 with VAT / pcs + price for transport

3849.50 ZŁ net + 23% VAT / pcs

bulk discounts:

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price from 1 pcs
3849.50 ZŁ
4734.89 ZŁ
price from 5 pcs
3618.53 ZŁ
4450.79 ZŁ

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Strength as well as shape of a neodymium magnet can be analyzed using our online calculation tool.

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BM 450x180x70 [4x M8] - magnetic beam
Specification/characteristics BM 450x180x70 [4x M8] - magnetic beam
properties
values
Cat. no.
090219
GTIN
5906301812548
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
length
450 mm [±0,1 mm]
Width
180 mm [±0,1 mm]
Height
70 mm [±0,1 mm]
Weight
28900 g [±0,1 mm]
Manufacturing Tolerance
± 0.1 mm

Magnetic properties of material

properties
values
units

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

It is a device used to catch unwanted metals from bulk raw materials transported on a belt. It is usually mounted above the conveyor belt (so-called overbelt) or in chutes. Protects mills, crushers, and shredders from falling screws, excavator teeth, or hammers.
Ferrite separators are characterized by a deep, penetrating magnetic field. They are ideal for catching large pieces of iron (screws, nails, cans, excavator teeth) from a long distance. Neodymiums are unrivaled in catching fine filings, wires, and small screws. The choice depends on the size of contaminants and the thickness of the raw material layer on the belt.
The separator housing is high-quality stainless steel, welded by TIG method. Thanks to this, the device is waterproof, dustproof, and very durable. The product meets standards for the food industry (HACCP/IFS/BRC).
Removing contaminants is simple but requires periodic stopping of the process or access to the magnet. Scrap is removed by mechanically moving it to the edge, where the magnetic field is weaker. Optionally, we offer systems facilitating cleaning (Extra Clean), which speed up maintenance.
Yes, we are a manufacturer and make plate separators to any size. Dimensions and mounting system are agreed with the client at the design stage. Send us dimensions of your conveyor belt and type of raw material, and we will select the appropriate solution.

Advantages and disadvantages of rare earth magnets.

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

  • Their power is maintained, and after around ten years it drops only by ~1% (according to research),
  • Neodymium magnets are exceptionally resistant to magnetic field loss caused by magnetic disturbances,
  • Thanks to the metallic finish, the surface of Ni-Cu-Ni, gold, or silver gives an aesthetic appearance,
  • Neodymium magnets deliver maximum magnetic induction on a small surface, which increases force concentration,
  • Thanks to resistance to high temperature, they are capable of working (depending on the shape) even at temperatures up to 230°C and higher...
  • Possibility of exact shaping and optimizing to individual conditions,
  • Significant place in electronics industry – they are utilized in magnetic memories, brushless drives, diagnostic systems, as well as industrial machines.
  • Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,

Characteristics of disadvantages of neodymium magnets: application proposals

  • Susceptibility to cracking is one of their disadvantages. Upon strong 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 lose their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
  • Magnets exposed to a humid environment can rust. Therefore during using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • Limited possibility of creating nuts in the magnet and complex forms - preferred is a housing - magnetic holder.
  • Potential hazard resulting from small fragments of magnets pose a threat, if swallowed, which becomes key in the context of child health protection. Furthermore, tiny parts of these devices are able to complicate diagnosis medical in case of swallowing.
  • Due to neodymium price, their price is relatively high,

Optimal lifting capacity of a neodymium magnetwhat affects it?

Breakaway force was defined for the most favorable conditions, including:

  • on a base made of mild steel, optimally conducting the magnetic field
  • whose transverse dimension reaches at least 10 mm
  • characterized by smoothness
  • with total lack of distance (without paint)
  • for force acting at a right angle (pull-off, not shear)
  • in stable room temperature

Determinants of practical lifting force of a magnet

During everyday use, the actual holding force depends on a number of factors, ranked from most significant:

  • Gap between surfaces – even a fraction of a millimeter of separation (caused e.g. by veneer or dirt) diminishes the pulling force, often by half at just 0.5 mm.
  • Loading method – catalog parameter refers to pulling vertically. When attempting to slide, the magnet exhibits significantly lower power (often approx. 20-30% of nominal force).
  • Base massiveness – insufficiently thick plate causes magnetic saturation, causing part of the power to be escaped to the other side.
  • Steel type – low-carbon steel attracts best. Higher carbon content lower magnetic permeability and holding force.
  • Surface condition – ground elements guarantee perfect abutment, which improves force. Uneven metal reduce efficiency.
  • Temperature influence – high temperature weakens magnetic field. Too high temperature can permanently demagnetize the magnet.

* Lifting capacity testing was performed on plates with a smooth surface of optimal thickness, under perpendicular forces, whereas under shearing force the holding force is lower. Additionally, even a slight gap {between} the magnet’s surface and the plate decreases the holding force.

Precautions when working with NdFeB magnets

Health Danger

Life threat: Strong magnets can deactivate heart devices and defibrillators. Stay away if you have electronic implants.

Safe distance

Equipment safety: Neodymium magnets can damage data carriers and delicate electronics (pacemakers, medical aids, timepieces).

Material brittleness

Beware of splinters. Magnets can explode upon uncontrolled impact, launching shards into the air. Wear goggles.

Pinching danger

Large magnets can crush fingers in a fraction of a second. Never put your hand betwixt two strong magnets.

Handling rules

Before starting, read the rules. Uncontrolled attraction can break the magnet or hurt your hand. Be predictive.

Product not for children

Neodymium magnets are not intended for children. Swallowing several magnets may result in them pinching intestinal walls, which poses a direct threat to life and necessitates immediate surgery.

Nickel allergy

Warning for allergy sufferers: The nickel-copper-nickel coating contains nickel. If an allergic reaction appears, cease working with magnets and wear gloves.

Heat sensitivity

Control the heat. Heating the magnet above 80 degrees Celsius will ruin its magnetic structure and pulling force.

Compass and GPS

Note: neodymium magnets produce a field that disrupts precision electronics. Keep a separation from your phone, device, and GPS.

Fire warning

Dust generated during machining of magnets is combustible. Avoid drilling into magnets without proper cooling and knowledge.

Warning!

Details about risks in the article: Safety of working with magnets.

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98