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neodymium magnets

We provide red color magnets Nd2Fe14B - our offer. All "magnets" on our website are available for immediate purchase (check the list). Check out the magnet price list for more details check the magnet price list

Magnets for treasure hunters F300 GOLD

Where to buy strong neodymium magnet? Magnetic holders in airtight and durable steel casing are excellent for use in variable and difficult weather conditions, including during rain and snow more information...

magnetic holders

Magnetic holders can be used to improve manufacturing, underwater discoveries, or finding meteorites made of metal check...

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NC NeoCube fi 5 mm kuleczki srebrne / N38 - neocube

neocube

Catalog no 120228

GTIN: 5906301812678

5

Weight

145 g

Magnetization Direction

↑ axial

Coating

[NiCuNi] nickel

49.99 with VAT / pcs + price for transport

40.64 ZŁ net + 23% VAT / pcs

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NC NeoCube fi 5 mm kuleczki srebrne / N38 - neocube
Specification/characteristics NC NeoCube fi 5 mm kuleczki srebrne / N38 - neocube
properties
values
Cat. no.
120228
GTIN
5906301812678
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Weight
145 g [±0,1 mm]
Magnetization Direction
↑ axial
Coating
[NiCuNi] nickel
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

These small neodymium balls are a creative antistress gadget that conquered the world. You can arrange a cube, sphere, bracelet, and even complicated geometric figures from them. A great desk gadget that occupies hands while thinking.
We warn: balls are dangerous if swallowed, therefore the toy is for people 14+. In case of swallowing, magnets can attract through intestinal walls, which requires immediate surgical intervention. It is an office and logic gadget, not a traditional toy.
Colored layers may lose shine over time from hitting each other during play. Black and gold versions are also very durable, but rainbow colors may wear off faster. Coating wear does not affect the magnetic force of the balls.
You can buy more boxes to build increasingly larger and more complicated solids. It is important to combine balls of the same diameter (standard is 5 mm). More balls mean more fun and a bigger challenge.
The best method to organize balls is to form them into a long chain. When you have a chain, you can fold it into strips of 6 balls, and then into a rectangle. Over time you will gain practice and arranging will become relaxing.

Pros and cons of neodymium magnets.

Besides their exceptional strength, neodymium magnets offer the following advantages:

  • They do not lose magnetism, even during approximately ten years – the drop in lifting capacity is only ~1% (based on measurements),
  • They are resistant to demagnetization induced by external field influence,
  • Thanks to the smooth finish, the plating of Ni-Cu-Ni, gold-plated, or silver-plated gives an visually attractive appearance,
  • Neodymium magnets ensure maximum magnetic induction on a contact point, which allows for strong attraction,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
  • Thanks to versatility in designing and the capacity to customize to complex applications,
  • Key role in future technologies – they find application in hard drives, electric drive systems, diagnostic systems, also complex engineering applications.
  • Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,

Disadvantages of neodymium magnets:

  • They are fragile upon too strong impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only protects the magnet but also increases its resistance to damage
  • When exposed to high temperature, neodymium magnets experience a drop in power. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding 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 immune to moisture, when using outdoors
  • Due to limitations in realizing nuts and complicated forms in magnets, we recommend using a housing - magnetic mechanism.
  • Potential hazard resulting from small fragments of magnets are risky, if swallowed, which gains importance in the context of child health protection. It is also worth noting that tiny parts of these magnets are able to complicate diagnosis medical when they are in the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Breakaway strength of the magnet in ideal conditionswhat contributes to it?

The lifting capacity listed is a theoretical maximum value performed under standard conditions:

  • using a base made of high-permeability steel, serving as a ideal flux conductor
  • whose thickness reaches at least 10 mm
  • with a surface perfectly flat
  • with total lack of distance (no coatings)
  • during pulling in a direction vertical to the mounting surface
  • in neutral thermal conditions

Determinants of practical lifting force of a magnet

Real force is affected by specific conditions, such as (from priority):

  • Space between magnet and steel – every millimeter of separation (caused e.g. by veneer or dirt) significantly weakens the pulling force, often by half at just 0.5 mm.
  • Direction of force – highest force is obtained only during perpendicular pulling. The resistance to sliding of the magnet along the plate is usually several times lower (approx. 1/5 of the lifting capacity).
  • Steel thickness – too thin plate causes magnetic saturation, causing part of the power to be lost into the air.
  • Steel grade – ideal substrate is pure iron steel. Hardened steels may have worse magnetic properties.
  • Base smoothness – the smoother and more polished the surface, the larger the contact zone and stronger the hold. Roughness creates an air distance.
  • Thermal factor – hot environment reduces magnetic field. Too high temperature can permanently damage the magnet.

* Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under perpendicular forces, whereas under parallel forces the holding force is lower. Moreover, even a slight gap {between} the magnet’s surface and the plate lowers the holding force.

Precautions when working with NdFeB magnets

Do not drill into magnets

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

Cards and drives

Do not bring magnets near a wallet, computer, or screen. The magnetic field can destroy these devices and wipe information from cards.

Bone fractures

Mind your fingers. Two large magnets will join immediately with a force of several hundred kilograms, destroying anything in their path. Exercise extreme caution!

Handling guide

Handle magnets with awareness. Their huge power can surprise even professionals. Stay alert and do not underestimate their force.

This is not a toy

Adult use only. Tiny parts can be swallowed, leading to intestinal necrosis. Keep away from children and animals.

Medical implants

Individuals with a ICD have to keep an large gap from magnets. The magnetism can stop the operation of the life-saving device.

Eye protection

Beware of splinters. Magnets can fracture upon uncontrolled impact, ejecting shards into the air. Eye protection is mandatory.

Sensitization to coating

Studies show that the nickel plating (standard magnet coating) is a strong allergen. For allergy sufferers, prevent direct skin contact and select coated magnets.

GPS Danger

A strong magnetic field disrupts the operation of magnetometers in phones and GPS navigation. Do not bring magnets near a smartphone to prevent breaking the sensors.

Power loss in heat

Regular neodymium magnets (grade N) lose power when the temperature surpasses 80°C. This process is irreversible.

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