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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

How we measure these parameters — certificates and measurements

product parameters »

14.60 zł net / pcs

17.96 zł with VAT (23% VAT) / pcs

price for transport

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17.96 zł
price from 50 pcs
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price from 110 pcs
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Frequently asked questions

How much will a magnetic holder hold in practice?
The catalogue value assumes full contact with smooth steel at least 10 mm thick and a perpendicular pull. Thinner sheet, paint, rust and surface irregularities reduce it considerably: on 1 mm sheet about half remains. Lifting and vertical mounting call for an additional safety margin.
Will a holder work on stainless steel?
Not on austenitic grades 304 and 316 — they are effectively non-magnetic. It will not work on aluminium, copper or brass either. Those materials need a mechanical gripper.
Which coating for which conditions?
Nickel-copper-nickel (NiCuNi) is the standard and covers most applications. Epoxy is used for damp environments and outdoor work, zinc is sufficient for dry interiors. Holders in a steel housing or in rubber also protect the magnet against impact.

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 data - 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
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 specification and ecology

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: 370483-2026
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This construction allows solid screwing of the magnet to the substrate using a bolt or rivet. It is a more durable and stronger solution than a bare magnetic ring.
We recommend manual tightening with feeling to not crush the magnetic ring. Correct mounting guarantees long holder life without cracks.
Yes, the steel housing (cup) acts as a screen directing the entire magnetic field to one side. Air gap, rust, or paint weaken the magnet's action.
These holders are ideal for mounting on non-magnetic surfaces such as wood, furniture board, plasterboard, or plastic. Great as mounting points in advertising and exhibition.
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).

Pros and cons of Nd2Fe14B magnets.

Advantages

Besides their remarkable field intensity, neodymium magnets offer the following advantages:
  • They retain attractive force for around 10 years – the drop is just ~1% (according to analyses),
  • They retain their magnetic properties even under external field action,
  • By covering with a lustrous coating of gold, the element gains an modern look,
  • They feature high magnetic induction at the operating surface, which improves attraction properties,
  • Through (appropriate) combination of ingredients, they can achieve high thermal resistance, allowing for action at temperatures reaching 230°C and above...
  • Considering the ability of precise shaping and customization to specialized requirements, magnetic components can be created in a variety of shapes and sizes, which amplifies use scope,
  • Fundamental importance in high-tech industry – they find application in data components, brushless drives, medical devices, and complex engineering applications.
  • Thanks to concentrated force, small magnets offer high operating force, with minimal size,

Cons

Disadvantages of neodymium magnets:
  • At very strong impacts they can break, therefore we advise placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening 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 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
  • Due to limitations in creating nuts and complex forms in magnets, we propose using cover - magnetic mount.
  • Health risk resulting from small fragments of magnets are risky, in case of ingestion, which becomes key in the aspect of protecting the youngest. Additionally, tiny parts of these devices are able to be problematic in diagnostics medical after entering the body.
  • High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Pull force analysis

Maximum lifting force for a neodymium magnet – what affects it?

Magnet power was determined for the most favorable conditions, assuming:
  • using a sheet made of high-permeability steel, acting as a ideal flux conductor
  • with a thickness of at least 10 mm
  • with a plane free of scratches
  • with total lack of distance (without impurities)
  • under axial application of breakaway force (90-degree angle)
  • at temperature approx. 20 degrees Celsius

Lifting capacity in real conditions – factors

Holding efficiency is influenced by specific conditions, including (from most important):
  • Gap (between the magnet and the metal), because even a tiny clearance (e.g. 0.5 mm) can cause a reduction in lifting capacity by up to 50% (this also applies to paint, rust or debris).
  • Load vector – highest force is reached only during perpendicular pulling. The shear force of the magnet along the plate is standardly many times smaller (approx. 1/5 of the lifting capacity).
  • Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
  • Chemical composition of the base – mild steel gives the best results. Alloy admixtures reduce magnetic permeability and holding force.
  • Smoothness – ideal contact is possible only on polished steel. Any scratches and bumps create air cushions, reducing force.
  • Temperature – heating the magnet causes a temporary drop of induction. It is worth remembering the thermal limit for a given model.

Lifting capacity was measured with the use of a smooth steel plate of suitable thickness (min. 20 mm), under perpendicular detachment force, however under shearing force the holding force is lower. In addition, even a minimal clearance between the magnet’s surface and the plate lowers the holding force.

Safe handling of NdFeB magnets
Material brittleness

Despite metallic appearance, neodymium is delicate and cannot withstand shocks. Avoid impacts, as the magnet may crumble into hazardous fragments.

Swallowing risk

Only for adults. Tiny parts pose a choking risk, leading to serious injuries. Store away from children and animals.

Combustion hazard

Fire warning: Rare earth powder is explosive. Avoid machining magnets without safety gear as this may cause fire.

Caution required

Handle magnets with awareness. Their huge power can shock even experienced users. Stay alert and respect their power.

Impact on smartphones

Remember: rare earth magnets generate a field that interferes with sensitive sensors. Maintain a safe distance from your phone, tablet, and navigation systems.

Heat warning

Keep cool. Neodymium magnets are susceptible to heat. If you require resistance above 80°C, ask us about special high-temperature series (H, SH, UH).

Crushing force

Pinching hazard: The pulling power is so immense that it can cause blood blisters, crushing, and even bone fractures. Use thick gloves.

Medical implants

For implant holders: Powerful magnets disrupt electronics. Keep minimum 30 cm distance or request help to handle the magnets.

Allergic reactions

Medical facts indicate that the nickel plating (the usual finish) is a potent allergen. If your skin reacts to metals, avoid touching magnets with bare hands and opt for encased magnets.

Electronic devices

Powerful magnetic fields can corrupt files on payment cards, hard drives, and other magnetic media. Stay away of at least 10 cm.

Attention! Need more info? Read our article: Why are neodymium magnets dangerous?