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HH 32x7.8 [M5] / N38 - through hole magnetic holder

through hole magnetic holder

Catalog no 370483

GTIN/EAN: 5906301814931

Load capacity 27.00 kg / 264.78 N
Diameter Ø
32 mm [±1 mm]
Height
7.8 mm [±1 mm]
Weight
37.8 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel
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17.96 zł with VAT / pcs + price for transport

14.60 zł net + 23% VAT / pcs

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Contact us by phone +48 22 499 98 98 alternatively send us a note through inquiry form our website.
Specifications and form of neodymium magnets can be checked using our our magnetic calculator.

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Technical details - HH 32x7.8 [M5] / N38 - through hole magnetic holder

Specification / characteristics - HH 32x7.8 [M5] / N38 - through hole magnetic holder

properties
properties values
Cat. no. 370483
GTIN/EAN 5906301814931
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 32 mm [±1 mm]
Height 7.8 mm [±1 mm]
Weight 37.8 g
Magnetization Direction ↑ axial
Load capacity ~ ? 27.00 kg / 264.78 N
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics HH 32x7.8 [M5] / N38 - through hole 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: 370483-2026
Measurement Calculator

Pulling force

Field Strength

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Unlike the countersunk version, the hole can be straight (for a cylindrical head screw) or with a recess (depending on the model). It is a more durable and stronger solution than a bare magnetic ring.
The magnet inside is brittle, so we advise against using impact drivers. Correct mounting guarantees long holder life without cracks.
Model HH 32x7.8 [M5] / N38 has a holding force of approx. 27.00 kg on thick steel. Air gap, rust, or paint weaken the magnet's action.
They are commonly used in carpentry as strong furniture latches. Thanks to flat construction, they do not take up much space and are discreet.
The steel housing and magnet are covered with an anti-corrosion layer (nickel, zinc, or chrome). This is not a stainless product (unless stated otherwise).

Strengths as well as weaknesses of Nd2Fe14B magnets.

Benefits

Apart from their notable power, neodymium magnets have these key benefits:
  • They have stable power, and over more than 10 years their performance decreases symbolically – ~1% (in testing),
  • They have excellent resistance to weakening of magnetic properties when exposed to opposing magnetic fields,
  • A magnet with a metallic nickel surface has an effective appearance,
  • The surface of neodymium magnets generates a intense magnetic field – this is a key feature,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • Considering the ability of precise molding and customization to unique requirements, magnetic components can be produced in a wide range of forms and dimensions, which makes them more universal,
  • Fundamental importance in electronics industry – they serve a role in magnetic memories, brushless drives, advanced medical instruments, as well as technologically advanced constructions.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Limitations

Disadvantages of neodymium magnets:
  • Brittleness is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a special holder, which not only protects them against impacts but also raises their durability
  • When exposed to high temperature, neodymium magnets suffer a drop in force. Often, when the temperature exceeds 80°C, their power decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation and corrosion.
  • Due to limitations in creating nuts and complicated forms in magnets, we recommend using casing - magnetic mount.
  • Possible danger resulting from small fragments of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child safety. Additionally, tiny parts of these devices are able to be problematic in diagnostics medical when they are in the body.
  • High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which hinders application in large quantities

Holding force characteristics

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

The lifting capacity listed is a theoretical maximum value performed under standard conditions:
  • on a plate made of mild steel, effectively closing the magnetic field
  • possessing a massiveness of minimum 10 mm to ensure full flux closure
  • with a surface free of scratches
  • under conditions of ideal adhesion (surface-to-surface)
  • during pulling in a direction vertical to the mounting surface
  • at room temperature

Lifting capacity in real conditions – factors

It is worth knowing that the application force will differ depending on elements below, starting with the most relevant:
  • Space between magnet and steel – every millimeter of distance (caused e.g. by varnish or unevenness) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
  • Force direction – declared lifting capacity refers to pulling vertically. When slipping, the magnet exhibits significantly lower power (typically approx. 20-30% of maximum force).
  • Element thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
  • Chemical composition of the base – mild steel attracts best. Alloy admixtures decrease magnetic permeability and holding force.
  • Surface structure – the more even the plate, the better the adhesion and stronger the hold. Unevenness creates an air distance.
  • Temperature influence – high temperature weakens pulling force. Exceeding the limit temperature can permanently damage the magnet.

Holding force was measured on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, in contrast under attempts to slide the magnet the load capacity is reduced by as much as fivefold. In addition, even a slight gap between the magnet’s surface and the plate reduces the holding force.

Precautions when working with neodymium magnets
Adults only

Product intended for adults. Tiny parts pose a choking risk, leading to intestinal necrosis. Keep out of reach of kids and pets.

GPS and phone interference

GPS units and smartphones are highly susceptible to magnetism. Close proximity with a powerful NdFeB magnet can permanently damage the sensors in your phone.

Immense force

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

Nickel coating and allergies

Studies show that the nickel plating (the usual finish) is a strong allergen. For allergy sufferers, avoid direct skin contact and opt for coated magnets.

Data carriers

Data protection: Strong magnets can damage data carriers and delicate electronics (pacemakers, medical aids, timepieces).

Thermal limits

Do not overheat. NdFeB magnets are sensitive to temperature. If you require resistance above 80°C, ask us about special high-temperature series (H, SH, UH).

Serious injuries

Large magnets can crush fingers in a fraction of a second. Under no circumstances place your hand betwixt two strong magnets.

ICD Warning

Warning for patients: Strong magnetic fields affect medical devices. Maintain minimum 30 cm distance or ask another person to work with the magnets.

Material brittleness

Protect your eyes. Magnets can fracture upon violent connection, launching shards into the air. We recommend safety glasses.

Mechanical processing

Powder generated during grinding of magnets is combustible. Do not drill into magnets without proper cooling and knowledge.

Danger! Looking for details? Check our post: Are neodymium magnets dangerous?