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NCM 20x13.5x5 / N38 - channel magnetic holder

channel magnetic holder

Catalog no 360487

GTIN/EAN: 5906301814863

5.00

Diameter Ø

20 mm [±1 mm]

Height

13.5 mm [±1 mm]

Weight

9.2 g

Magnetization Direction

↑ axial

Load capacity

8.00 kg / 78.45 N

Coating

[NiCuNi] Nickel

7.29 with VAT / pcs + price for transport

5.93 ZŁ net + 23% VAT / pcs

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Technical of the product - NCM 20x13.5x5 / N38 - channel magnetic holder

Specification / characteristics - NCM 20x13.5x5 / N38 - channel magnetic holder

properties
properties values
Cat. no. 360487
GTIN/EAN 5906301814863
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 20 mm [±1 mm]
Height 13.5 mm [±1 mm]
Weight 9.2 g
Magnetization Direction ↑ axial
Load capacity ~ ? 8.00 kg / 78.45 N
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics NCM 20x13.5x5 / 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 specification and ecology
Chemical composition
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%
Sustainability
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: 360487-2025
Measurement Calculator
Force (pull)

Field Strength

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Thanks to two poles on one plane, this holder holds much stronger than a regular block magnet of the same size. They are very flat and durable, making them ideal for mounting in tight spaces (e.g., in window profiles).
Two mounting points (in larger models) prevent the holder from rotating and ensure a solid connection. Hole spacing allows secure fixing even in difficult conditions.
Model NCM 20x13.5x5 / N38 reaches a capacity of up to 8.00 kg, which is an impressive result for such a flat element. This force is available with direct contact with metal over the entire surface.
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. With constant contact with water, corrosion may appear, so we do not recommend them for work in rain without additional protection.

Pros as well as cons of neodymium magnets.

Advantages

In addition to their magnetic capacity, neodymium magnets provide the following advantages:
  • They retain attractive force for almost ten years – the drop is just ~1% (based on simulations),
  • Neodymium magnets remain remarkably resistant to loss of magnetic properties caused by external interference,
  • In other words, due to the smooth layer of gold, the element gains a professional look,
  • Magnetic induction on the top side of the magnet is very high,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can function (depending on the form) even at a temperature of 230°C or more...
  • Thanks to the ability of precise forming and customization to individualized solutions, NdFeB magnets can be created in a broad palette of shapes and sizes, which makes them more universal,
  • Huge importance in electronics industry – they are commonly used in magnetic memories, drive modules, medical devices, as well as modern systems.
  • Thanks to concentrated force, small magnets offer high operating force, with minimal size,

Weaknesses

What to avoid - cons of neodymium magnets and ways of using them
  • They are prone to damage upon too strong impacts. To avoid cracks, it is worth protecting magnets in a protective case. Such protection not only shields the magnet but also improves its resistance to damage
  • Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of strength (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
  • Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material resistant to moisture, when using outdoors
  • Limited possibility of producing threads in the magnet and complicated shapes - preferred is casing - magnet mounting.
  • Possible danger resulting from small fragments of magnets are risky, if swallowed, which is particularly important in the context of child health protection. Additionally, small elements of these products are able to be problematic in diagnostics medical in case of swallowing.
  • Due to neodymium price, their price exceeds standard values,

Lifting parameters

Magnetic strength at its maximum – what contributes to it?

Holding force of 8.00 kg is a theoretical maximum value performed under specific, ideal conditions:
  • using a sheet made of high-permeability steel, serving as a circuit closing element
  • with a cross-section minimum 10 mm
  • with a plane perfectly flat
  • under conditions of no distance (surface-to-surface)
  • under vertical force vector (90-degree angle)
  • in neutral thermal conditions

Impact of factors on magnetic holding capacity in practice

During everyday use, the actual lifting capacity results from many variables, presented from the most important:
  • Gap between surfaces – every millimeter of distance (caused e.g. by varnish or dirt) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
  • Force direction – catalog parameter refers to detachment vertically. When applying parallel force, the magnet exhibits much less (typically approx. 20-30% of nominal force).
  • Substrate thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
  • Steel grade – the best choice is high-permeability steel. Hardened steels may attract less.
  • Surface condition – smooth surfaces ensure maximum contact, which increases field saturation. Rough surfaces weaken the grip.
  • Temperature – heating the magnet results in weakening of induction. Check the thermal limit for a given model.

Holding force was checked on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, in contrast under shearing force the load capacity is reduced by as much as 75%. Moreover, even a slight gap between the magnet and the plate lowers the load capacity.

H&S for magnets
Conscious usage

Handle magnets consciously. Their huge power can surprise even experienced users. Be vigilant and respect their force.

Threat to electronics

Do not bring magnets near a purse, laptop, or TV. The magnetic field can irreversibly ruin these devices and wipe information from cards.

Machining danger

Drilling and cutting of NdFeB material carries a risk of fire hazard. Neodymium dust reacts violently with oxygen and is hard to extinguish.

Crushing risk

Protect your hands. Two powerful magnets will join instantly with a force of massive weight, destroying anything in their path. Exercise extreme caution!

Adults only

NdFeB magnets are not suitable for play. Accidental ingestion of multiple magnets may result in them pinching intestinal walls, which poses a direct threat to life and necessitates immediate surgery.

Demagnetization risk

Watch the temperature. Heating the magnet above 80 degrees Celsius will ruin its properties and pulling force.

Material brittleness

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

Compass and GPS

GPS units and smartphones are highly sensitive to magnetism. Direct contact with a powerful NdFeB magnet can permanently damage the internal compass in your phone.

Allergy Warning

Medical facts indicate that nickel (standard magnet coating) is a common allergen. If you have an allergy, refrain from direct skin contact or opt for encased magnets.

Medical implants

Individuals with a ICD must keep an safe separation from magnets. The magnetic field can stop the operation of the implant.

Caution! Want to know more? Check our post: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98