Neodymium magnets – most powerful on the market

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NCM 30x13.5x5 / N38 - channel magnetic holder

channel magnetic holder

Catalog no 360488

GTIN/EAN: 5906301814870

Diameter Ø

30 mm [±1 mm]

Height

13.5 mm [±1 mm]

Weight

14 g

Magnetization Direction

↑ axial

Load capacity

16.00 kg / 156.91 N

Coating

[NiCuNi] Nickel

9.40 with VAT / pcs + price for transport

7.64 ZŁ net + 23% VAT / pcs

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Technical details - NCM 30x13.5x5 / N38 - channel magnetic holder

Specification / characteristics - NCM 30x13.5x5 / N38 - channel magnetic holder

properties
properties values
Cat. no. 360488
GTIN/EAN 5906301814870
Production/Distribution Dhit sp. z o.o.
ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin Poland / China / Germany
Customs code 85059029
Diameter Ø 30 mm [±1 mm]
Height 13.5 mm [±1 mm]
Weight 14 g
Magnetization Direction ↑ axial
Load capacity ~ ? 16.00 kg / 156.91 N
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics NCM 30x13.5x5 / N38 - channel magnetic holder
properties values units
remenance Br [min. - max.] ? 12.2-12.6 kGs
remenance Br [min. - max.] ? 1220-1260 mT
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

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 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
Elemental analysis
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: 360488-2026
Magnet Unit Converter
Magnet pull force

Magnetic Induction

Other deals

Channel holders are some of the most efficient mounting magnets, built based on a steel U-profile (trough). They are widely used in industry for fixing guards, flaps, doors, and in robot grippers.
Two mounting points (in larger models) prevent the holder from rotating and ensure a solid connection. They can be screwed to wood, walls, aluminum profiles, furniture boards, or plastics.
Thanks to the short-circuiting of the magnetic field by steel side walls, holding force is concentrated and very large. Even a small channel holder can surprise with its power, surpassing pot magnets.
Magnets are shielded on three sides by steel, increasing their lifespan and crack resistance. Thanks to solid construction, these holders do not crack as easily as bare neodymium plates.
The product is intended mainly for indoor use (dry rooms). To increase resistance to external conditions, they can be varnished or painted.

Strengths as well as weaknesses of neodymium magnets.

Advantages

In addition to their pulling strength, neodymium magnets provide the following advantages:
  • They retain attractive force for around 10 years – the drop is just ~1% (in theory),
  • They feature excellent resistance to magnetism drop when exposed to opposing magnetic fields,
  • By covering with a smooth layer of silver, the element presents an nice look,
  • The surface of neodymium magnets generates a maximum magnetic field – this is one of their assets,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
  • Possibility of individual forming as well as modifying to complex conditions,
  • Universal use in modern industrial fields – they serve a role in data components, electric drive systems, advanced medical instruments, also modern systems.
  • Thanks to concentrated force, small magnets offer high operating force, with minimal size,

Disadvantages

Disadvantages of neodymium magnets:
  • To avoid cracks upon strong impacts, we suggest using special steel holders. Such a solution protects the magnet and simultaneously improves its durability.
  • We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
  • When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation and corrosion.
  • Limited ability of producing threads in the magnet and complex shapes - recommended is a housing - mounting mechanism.
  • Potential hazard resulting from small fragments of magnets can be dangerous, in case of ingestion, which becomes key in the aspect of protecting the youngest. Additionally, small components of these products can be problematic in diagnostics medical in case of swallowing.
  • Due to complex production process, their price is relatively high,

Holding force characteristics

Detachment force of the magnet in optimal conditionswhat contributes to it?

The specified lifting capacity refers to the peak performance, measured under laboratory conditions, namely:
  • using a plate made of low-carbon steel, serving as a magnetic yoke
  • with a cross-section no less than 10 mm
  • with a plane free of scratches
  • without the slightest insulating layer between the magnet and steel
  • under axial application of breakaway force (90-degree angle)
  • in stable room temperature

Practical lifting capacity: influencing factors

During everyday use, the actual holding force depends on many variables, ranked from crucial:
  • Distance (between the magnet and the metal), because even a tiny distance (e.g. 0.5 mm) results in a decrease in lifting capacity by up to 50% (this also applies to paint, rust or dirt).
  • Angle of force application – maximum parameter is reached only during perpendicular pulling. The force required to slide of the magnet along the plate is usually many times smaller (approx. 1/5 of the lifting capacity).
  • Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field passes through the material instead of generating force.
  • Chemical composition of the base – mild steel attracts best. Alloy steels decrease magnetic permeability and lifting capacity.
  • Plate texture – ground elements guarantee perfect abutment, which increases field saturation. Rough surfaces weaken the grip.
  • Temperature – temperature increase results in weakening of induction. It is worth remembering the thermal limit for a given model.

Holding force was tested on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, whereas under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a slight gap between the magnet’s surface and the plate reduces the lifting capacity.

Safe handling of neodymium magnets
Heat warning

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

Protect data

Very strong magnetic fields can corrupt files on credit cards, hard drives, and other magnetic media. Maintain a gap of min. 10 cm.

Choking Hazard

Strictly store magnets out of reach of children. Risk of swallowing is high, and the consequences of magnets connecting inside the body are tragic.

Fire warning

Fire hazard: Neodymium dust is explosive. Do not process magnets in home conditions as this may cause fire.

Crushing force

Danger of trauma: The attraction force is so immense that it can cause hematomas, crushing, and broken bones. Protective gloves are recommended.

Keep away from electronics

Remember: neodymium magnets produce a field that confuses sensitive sensors. Maintain a separation from your phone, tablet, and GPS.

Material brittleness

NdFeB magnets are ceramic materials, meaning they are fragile like glass. Impact of two magnets will cause them breaking into small pieces.

Allergy Warning

Some people suffer from a contact allergy to nickel, which is the typical protective layer for neodymium magnets. Frequent touching might lead to skin redness. We suggest wear protective gloves.

Respect the power

Use magnets consciously. Their powerful strength can surprise even experienced users. Be vigilant and respect their power.

Medical implants

Patients with a heart stimulator should keep an safe separation from magnets. The magnetism can disrupt the functioning of the life-saving device.

Warning! Learn more 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