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neodymium magnets

We provide yellow color magnets Nd2Fe14B - our proposal. All magnesy neodymowe on our website are available for immediate delivery (see the list). See the magnet price list for more details see the magnet price list

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magnetic holders

Holders with magnets can be used to facilitate manufacturing, exploring underwater areas, or finding space rocks made of metal more information...

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NC NeoCube fi 5 mm kuleczki kolorowe / N38 - neocube

neocube

Catalog no 120229

GTIN: 5906301812685

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 kolorowe / N38 - neocube
Specification/characteristics NC NeoCube fi 5 mm kuleczki kolorowe / N38 - neocube
properties
values
Cat. no.
120229
GTIN
5906301812685
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Weight
145 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] nickel
Manufacturing Tolerance
±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

It is a magnetic puzzle allowing for building solids, chains, and jewelry. Arranging balls acts relaxingly, destresses, and improves concentration. It's an ideal gift for teenagers and adults looking for intellectual entertainment.
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.
Color abrasion at ball contacts is a normal process resulting from metal-on-metal friction. If you care about maximum aesthetic durability, choose the silver (nickel-plated) version. 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). With two sets (432 balls), you can build much more interesting figures than with one.
The best method to organize balls is to form them into a long chain. The "strip" method allows you to quickly arrange a cube fitting the box. Beginnings can be difficult, but the satisfaction from a perfectly arranged cube is immense.

Strengths as well as weaknesses of neodymium magnets.

Besides their high retention, neodymium magnets are valued for these benefits:

  • Their magnetic field remains stable, and after around ten years it decreases only by ~1% (according to research),
  • They retain their magnetic properties even under strong external field,
  • Thanks to the metallic finish, the plating of nickel, gold-plated, or silver gives an professional appearance,
  • Neodymium magnets deliver maximum magnetic induction on a contact point, which increases force concentration,
  • 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 modularity in forming and the ability to modify to individual projects,
  • Fundamental importance in modern industrial fields – they find application in computer drives, electromotive mechanisms, advanced medical instruments, and technologically advanced constructions.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

What to avoid - cons of neodymium magnets and proposals for their use:

  • At strong impacts they can crack, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage and increases the magnet's durability.
  • Neodymium magnets lose their force 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 stability even at temperatures up to 230°C
  • They rust in a humid environment. For use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
  • We recommend a housing - magnetic holder, due to difficulties in realizing nuts inside the magnet and complex shapes.
  • Possible danger to health – tiny shards of magnets pose a threat, in case of ingestion, which gains importance in the context of child safety. Additionally, small components of these products can be problematic in diagnostics medical when they are in the body.
  • High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Highest magnetic holding forcewhat affects it?

Holding force of 0 kg is a result of laboratory testing performed under standard conditions:

  • on a base made of mild steel, optimally conducting the magnetic flux
  • possessing a massiveness of min. 10 mm to ensure full flux closure
  • with a plane perfectly flat
  • without the slightest air gap between the magnet and steel
  • under perpendicular force vector (90-degree angle)
  • in stable room temperature

Practical lifting capacity: influencing factors

It is worth knowing that the magnet holding will differ subject to the following factors, starting with the most relevant:

  • Space between magnet and steel – every millimeter of distance (caused e.g. by veneer or unevenness) diminishes the pulling force, often by half at just 0.5 mm.
  • Loading method – declared lifting capacity refers to pulling vertically. When applying parallel force, the magnet exhibits much less (typically approx. 20-30% of nominal force).
  • Base massiveness – too thin steel does not accept the full field, causing part of the power to be wasted to the other side.
  • Chemical composition of the base – mild steel gives the best results. Alloy steels decrease magnetic properties and holding force.
  • Surface condition – ground elements ensure maximum contact, which improves field saturation. Uneven metal reduce efficiency.
  • Thermal factor – high temperature weakens pulling force. Too high temperature can permanently demagnetize the magnet.

* Lifting capacity was assessed using a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular detachment force, whereas under parallel forces the holding force is lower. Additionally, even a slight gap {between} the magnet’s surface and the plate reduces the load capacity.

Warnings

Threat to navigation

A powerful magnetic field negatively affects the operation of magnetometers in smartphones and GPS navigation. Do not bring magnets near a device to prevent breaking the sensors.

Medical implants

For implant holders: Strong magnetic fields disrupt electronics. Keep at least 30 cm distance or ask another person to work with the magnets.

Material brittleness

Watch out for shards. Magnets can explode upon uncontrolled impact, launching sharp fragments into the air. We recommend safety glasses.

Nickel coating and allergies

Some people suffer from a contact allergy to Ni, which is the common plating for NdFeB magnets. Extended handling may cause an allergic reaction. We suggest use safety gloves.

Pinching danger

Watch your fingers. Two large magnets will join instantly with a force of massive weight, destroying everything in their path. Be careful!

Electronic hazard

Avoid bringing magnets close to a purse, laptop, or screen. The magnetic field can destroy these devices and wipe information from cards.

Powerful field

Use magnets consciously. Their huge power can shock even professionals. Stay alert and respect their power.

Choking Hazard

NdFeB magnets are not toys. Swallowing a few magnets may result in them connecting inside the digestive tract, which constitutes a critical condition and necessitates urgent medical intervention.

Heat warning

Standard neodymium magnets (N-type) undergo demagnetization when the temperature exceeds 80°C. Damage is permanent.

Dust is flammable

Fire warning: Neodymium dust is explosive. Avoid machining magnets without safety gear as this may cause fire.

Safety First!

More info about hazards in the article: Safety of working with magnets.

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98