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NC NeoCube fi 5 mm kuleczki srebrne / N38 - neocube

neocube

Catalog no 120228

GTIN/EAN: 5906301812678

5.00
Weight
145 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

check parameters »

40.64 zł net / pcs

49.99 zł with VAT (23% VAT) / pcs

price for transport

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Frequently asked questions

Are these magnets safe for children?
Small neodymium magnets are dangerous if swallowed — two magnets swallowed separately can join through the intestinal wall. Construction sets and magnetic balls are not toys for small children and require adult supervision. Check the age marking and the flux index before buying.
What happens if a magnet is dropped on a hard floor?
Sintered NdFeB is brittle and may crack or chip. A damaged coating exposes material that corrodes in damp air within hours. A cracked magnet should not stay in a child's set.
Can magnets damage electronic equipment?
A strong field can harm magnetic stripe cards, pacemakers and insulin pumps, and can disturb the compass in a phone. Keep sets away from such devices.

Guides from the knowledge base

Want to talk magnets?

Call us now +48 888 99 98 98 alternatively let us know using contact form the contact section.
Specifications and structure of a neodymium magnet can be estimated using our power calculator.

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Technical specification - NC NeoCube fi 5 mm kuleczki srebrne / N38 - neocube

Specification / characteristics - NC NeoCube fi 5 mm kuleczki srebrne / N38 - neocube

properties
properties values
Cat. no. 120228
GTIN/EAN 5906301812678
Production/Distribution Dhit sp. z o.o.
ul. Zielona 14 05-850 Ożarów Mazowiecki PL
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

Specification / characteristics NC NeoCube fi 5 mm kuleczki srebrne / N38 - neocube
properties values units
Remanence Br ? 12.2-12.6 kGs
Remanence Br ? 1220-1260 mT
Coercivity bHc ? 10.8-11.5 kOe
Coercivity bHc ? 860-915 kA/m
Intrinsic coercivity iHc ≥ 12 kOe
Intrinsic coercivity iHc ≥ 955 kA/m
Energy product BHmax ? 36-38 BH max MGOe
Energy product BHmax ? 287-303 BH max KJ/m
Maximum working temperature ? ≤ 80 °C

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°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 310 °C
Curie Temperature TF 590 °F
Specific resistance 150 μΩ⋅cm
Bending strength 250 MPa
Compressive strength 1000~1100 MPa
Thermal expansion parallel (∥) to orientation (M) (3-4) x 10-6 °C-1
Thermal expansion perpendicular (⊥) to orientation (M) -(1-3) x 10-6 °C-1
Young's modulus 1.7 x 104 kg/mm²
Technical and environmental data

Material specification

iron (Fe) 64% – 68%
neodymium (Nd) 29% – 32%
boron (B) 1.1% – 1.2%
dysprosium (Dy) 0.5% – 2.0%
coating (Ni-Cu-Ni) < 0.05%

Ecology and recycling (GPSR)

recyclability (EoL) 100%
recycled raw materials ~10% (pre-cons)
carbon footprint low / zredukowany
waste code (EWC) 16 02 16
Safety card (GPSR)
responsible entity
Dhit sp. z o.o.
ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki
tel: +48 22 499 98 98 | e-mail: bok@dhit.pl
batch number/type
id: 120228-2026
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These small neodymium balls are a creative antistress gadget that conquered the world. Arranging balls acts relaxingly, destresses, and improves concentration. A great desk gadget that occupies hands while thinking.
The product is dedicated to teenagers and adults, it must be absolutely kept away from children. Swallowing several balls can lead to dangerous joining of them in the intestines. We recommend using the product by persons aware of the danger.
Colored layers may lose shine over time from hitting each other during play. If you care about maximum aesthetic durability, choose the silver (nickel-plated) version. Despite possible abrasions, magnets still attract just as strongly.
Yes, sets can be combined without limits, creating gigantic structures. If you have 5mm balls, buy the same ones so they fit perfectly together. With two sets (432 balls), you can build much more interesting figures than with one.
The key to success is patience and separating balls one by one. The "strip" method allows you to quickly arrange a cube fitting the box. Over time you will gain practice and arranging will become relaxing.

Advantages as well as disadvantages of rare earth magnets.

Strengths

Besides their immense strength, neodymium magnets offer the following advantages:
  • They retain magnetic properties for almost 10 years – the loss is just ~1% (in theory),
  • They retain their magnetic properties even under strong external field,
  • A magnet with a smooth silver surface is more attractive,
  • They are known for high magnetic induction at the operating surface, making them more effective,
  • 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 designing and the capacity to adapt to unusual requirements,
  • Universal use in innovative solutions – they serve a role in mass storage devices, electromotive mechanisms, advanced medical instruments, and multitasking production systems.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Weaknesses

Problematic aspects of neodymium magnets and ways of using them
  • Brittleness is one of their disadvantages. Upon intense impact they can fracture. We recommend keeping them in a steel housing, which not only secures them against impacts but also raises their durability
  • When exposed to high temperature, neodymium magnets suffer a drop in power. Often, when the temperature exceeds 80°C, their power decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • They oxidize in a humid environment. For use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in producing threads and complex shapes in magnets, we propose using casing - magnetic mechanism.
  • Potential hazard resulting from small fragments of magnets can be dangerous, in case of ingestion, which is particularly important in the aspect of protecting the youngest. Additionally, small components of these devices can disrupt the diagnostic process medical in case of swallowing.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Pull force analysis

Maximum holding power of the magnet – what contributes to it?

The force parameter is a theoretical maximum value executed under the following configuration:
  • with the use of a sheet made of low-carbon steel, guaranteeing full magnetic saturation
  • with a cross-section minimum 10 mm
  • with an polished touching surface
  • under conditions of gap-free contact (surface-to-surface)
  • for force applied at a right angle (pull-off, not shear)
  • at room temperature

Determinants of practical lifting force of a magnet

In practice, the actual lifting capacity results from several key aspects, listed from most significant:
  • Air gap (between the magnet and the plate), as even a microscopic distance (e.g. 0.5 mm) can cause a decrease in lifting capacity by up to 50% (this also applies to varnish, rust or dirt).
  • Force direction – declared lifting capacity refers to pulling vertically. When attempting to slide, the magnet holds much less (often approx. 20-30% of nominal force).
  • Steel thickness – too thin plate does not close the flux, causing part of the power to be wasted to the other side.
  • Metal type – not every steel reacts the same. Alloy additives weaken the attraction effect.
  • Smoothness – full contact is obtained only on polished steel. Rough texture reduce the real contact area, weakening the magnet.
  • Temperature – temperature increase causes a temporary drop of induction. It is worth remembering the maximum operating temperature for a given model.

Lifting capacity testing was conducted on plates with a smooth surface of suitable thickness, under perpendicular forces, however under parallel forces the lifting capacity is smaller. Moreover, even a slight gap between the magnet’s surface and the plate lowers the load capacity.

Safety rules for work with NdFeB magnets
Beware of splinters

Beware of splinters. Magnets can explode upon violent connection, ejecting sharp fragments into the air. We recommend safety glasses.

Keep away from computers

Avoid bringing magnets near a wallet, computer, or screen. The magnetic field can permanently damage these devices and erase data from cards.

Do not underestimate power

Before starting, read the rules. Uncontrolled attraction can destroy the magnet or injure your hand. Think ahead.

Avoid contact if allergic

A percentage of the population experience a hypersensitivity to Ni, which is the typical protective layer for NdFeB magnets. Frequent touching may cause an allergic reaction. We recommend wear protective gloves.

Implant safety

Patients with a pacemaker should keep an absolute distance from magnets. The magnetic field can interfere with the operation of the life-saving device.

Magnetic interference

Navigation devices and smartphones are highly susceptible to magnetism. Direct contact with a powerful NdFeB magnet can permanently damage the internal compass in your phone.

This is not a toy

Product intended for adults. Small elements can be swallowed, leading to intestinal necrosis. Keep out of reach of kids and pets.

Do not drill into magnets

Dust generated during cutting of magnets is self-igniting. Avoid drilling into magnets without proper cooling and knowledge.

Permanent damage

Control the heat. Exposing the magnet above 80 degrees Celsius will ruin its magnetic structure and strength.

Pinching danger

Big blocks can crush fingers instantly. Under no circumstances place your hand betwixt two attracting surfaces.

Important! Learn more about risks in the article: Safety of working with magnets.