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neodymium magnets

We offer blue color magnets Nd2Fe14B - our proposal. All magnesy in our store are in stock for immediate delivery (see the list). Check out the magnet price list for more details see the magnet price list

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

channel magnetic holder

Catalog no 360488

GTIN: 5906301814870

0

Diameter Ø

30 mm [±1 mm]

Height

13.5 mm [±1 mm]

Weight

14 g

Magnetization Direction

↑ axial

Load capacity

16 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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NCM 30x13.5x5 / N38 - channel magnetic holder
Specification/characteristics NCM 30x13.5x5 / N38 - channel magnetic holder
properties
values
Cat. no.
360488
GTIN
5906301814870
Production/Distribution
Dhit sp. z o.o.
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 kg / 156.91 N
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

Their unique "sandwich" construction (steel-magnet-steel) short-circuits the magnetic field, giving huge force on a small surface. 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. Thanks to the flat construction, they are great for surface mounting without milling.
Channel holders are characterized by an exceptionally high force-to-size ratio. Even a small channel holder can surprise with its power, surpassing pot magnets.
The steel trough (U-profile) perfectly protects glued magnets from impacts and crushing. They are ideal for heavy doors, machine flaps, molds, and fastening systems in industry.
The steel housing is usually galvanized, providing basic protection against corrosion. In dry rooms, holders are practically indestructible.

Strengths as well as weaknesses of neodymium magnets.

Besides their tremendous field intensity, neodymium magnets offer the following advantages:

  • They do not lose strength, even during nearly ten years – the decrease in lifting capacity is only ~1% (according to tests),
  • Neodymium magnets remain highly resistant to magnetic field loss caused by external field sources,
  • Thanks to the metallic finish, the plating of nickel, gold, or silver gives an visually attractive appearance,
  • Magnets have maximum magnetic induction on the working surface,
  • Through (adequate) combination of ingredients, they can achieve high thermal resistance, enabling operation at temperatures approaching 230°C and above...
  • Possibility of exact modeling as well as adjusting to specific requirements,
  • Key role in electronics industry – they are commonly used in computer drives, brushless drives, precision medical tools, and complex engineering applications.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Cons of neodymium magnets: application proposals

  • To avoid cracks under impact, we suggest using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
  • NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
  • Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we advise using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • Limited ability of producing threads in the magnet and complicated shapes - recommended is casing - magnetic holder.
  • Possible danger to health – tiny shards of magnets can be dangerous, in case of ingestion, which becomes key in the aspect of protecting the youngest. It is also worth noting that tiny parts of these magnets can complicate diagnosis medical after entering the body.
  • Due to expensive raw materials, their price is relatively high,

Optimal lifting capacity of a neodymium magnetwhat affects it?

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

  • using a sheet made of low-carbon steel, functioning as a ideal flux conductor
  • whose thickness is min. 10 mm
  • with an ideally smooth touching surface
  • with zero gap (without coatings)
  • during pulling in a direction perpendicular to the plane
  • at temperature approx. 20 degrees Celsius

Key elements affecting lifting force

In practice, the actual holding force is determined by many variables, presented from most significant:

  • Distance (betwixt the magnet and the metal), because even a microscopic distance (e.g. 0.5 mm) results in a reduction in lifting capacity by up to 50% (this also applies to varnish, corrosion or debris).
  • Pull-off angle – remember that the magnet holds strongest perpendicularly. Under shear forces, the capacity drops significantly, often to levels of 20-30% of the maximum value.
  • Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of generating force.
  • Material type – the best choice is pure iron steel. Cast iron may generate lower lifting capacity.
  • Surface condition – ground elements ensure maximum contact, which improves field saturation. Rough surfaces weaken the grip.
  • Thermal environment – temperature increase causes a temporary drop of force. It is worth remembering the thermal limit for a given model.

* Lifting capacity testing was conducted on a smooth plate of suitable thickness, under perpendicular forces, in contrast under attempts to slide the magnet the holding force is lower. Moreover, even a small distance {between} the magnet and the plate reduces the load capacity.

Safe handling of NdFeB magnets

Shattering risk

Neodymium magnets are sintered ceramics, meaning they are very brittle. Collision of two magnets leads to them breaking into shards.

GPS Danger

Navigation devices and smartphones are extremely susceptible to magnetism. Direct contact with a strong magnet can decalibrate the sensors in your phone.

Allergic reactions

Medical facts indicate that the nickel plating (the usual finish) is a strong allergen. If you have an allergy, refrain from direct skin contact or choose encased magnets.

Bone fractures

Risk of injury: The pulling power is so immense that it can cause blood blisters, pinching, and broken bones. Protective gloves are recommended.

Product not for children

Always keep magnets out of reach of children. Choking hazard is high, and the consequences of magnets clamping inside the body are tragic.

Power loss in heat

Regular neodymium magnets (N-type) lose power when the temperature exceeds 80°C. Damage is permanent.

Combustion hazard

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

Handling guide

Use magnets with awareness. Their immense force can surprise even professionals. Be vigilant and respect their power.

Protect data

Very strong magnetic fields can corrupt files on credit cards, HDDs, and storage devices. Stay away of min. 10 cm.

Life threat

For implant holders: Strong magnetic fields disrupt electronics. Maintain at least 30 cm distance or request help to work with the magnets.

Danger!

More info about hazards in the article: Magnet Safety Guide.

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98