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HH 36x7.5 [M6] / N38 - through hole magnetic holder

through hole magnetic holder

Catalog no 370479

GTIN/EAN: 5906301814894

Load capacity 26.00 kg / 254.97 N
Diameter Ø
36 mm [±1 mm]
Height
7.5 mm [±1 mm]
Weight
36 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

product specifications »

31.63 zł net / pcs

38.90 zł with VAT (23% VAT) / pcs

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38.90 zł
price from 20 pcs
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price from 50 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

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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 details - HH 36x7.5 [M6] / N38 - through hole magnetic holder

Specification / characteristics - HH 36x7.5 [M6] / N38 - through hole magnetic holder

properties
properties values
Cat. no. 370479
GTIN/EAN 5906301814894
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 36 mm [±1 mm]
Height 7.5 mm [±1 mm]
Weight 36 g
Magnetization Direction ↑ axial
Load capacity ~ ? 26.00 kg / 254.97 N
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics HH 36x7.5 [M6] / 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

Material specification

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: 370479-2026
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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.
Similarly to other neodymium magnets, caution should be exercised when tightening the screw. Select a screw of appropriate diameter and head shape (cylindrical or conical, depending on model).
Model HH 36x7.5 [M6] / N38 has a holding force of approx. 26.00 kg on thick steel. Air gap, rust, or paint weaken the magnet's action.
They serve as a base for holding metal elements, e.g., doors, flaps, covers, or tools. Can be used to build jigs in the workshop or mount lighting.
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 neodymium magnets.

Strengths

In addition to their pulling strength, neodymium magnets provide the following advantages:
  • They retain attractive force for almost 10 years – the drop is just ~1% (in theory),
  • Magnets very well protect themselves against demagnetization caused by foreign field sources,
  • By using a smooth coating of silver, the element acquires an aesthetic look,
  • Magnetic induction on the top side of the magnet turns out to be extremely intense,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and are able to act (depending on the shape) even at a temperature of 230°C or more...
  • Thanks to modularity in constructing and the ability to customize to specific needs,
  • Key role in advanced technology sectors – they serve a role in HDD drives, electric motors, advanced medical instruments, as well as modern systems.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which enables their usage in compact constructions

Weaknesses

Disadvantages of NdFeB magnets:
  • To avoid cracks upon strong impacts, we suggest using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
  • NdFeB magnets lose strength when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop 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 very resistant to heat
  • 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.
  • Limited possibility of producing threads in the magnet and complex shapes - recommended is a housing - magnetic holder.
  • Potential hazard to health – tiny shards of magnets can be dangerous, in case of ingestion, which becomes key in the context of child safety. Additionally, small components of these devices are able to complicate diagnosis medical when they are in the body.
  • High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which hinders application in large quantities

Pull force analysis

Maximum magnetic pulling force – what contributes to it?

Information about lifting capacity was determined for the most favorable conditions, including:
  • on a base made of mild steel, optimally conducting the magnetic flux
  • whose thickness equals approx. 10 mm
  • with a surface perfectly flat
  • without any clearance between the magnet and steel
  • for force acting at a right angle (pull-off, not shear)
  • at room temperature

What influences lifting capacity in practice

Please note that the application force will differ influenced by the following factors, in order of importance:
  • Gap between magnet and steel – even a fraction of a millimeter of separation (caused e.g. by varnish or dirt) drastically reduces the pulling force, often by half at just 0.5 mm.
  • Force direction – declared lifting capacity refers to pulling vertically. When slipping, the magnet holds much less (often approx. 20-30% of maximum force).
  • Element thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
  • Material composition – not every steel attracts identically. Alloy additives weaken the interaction with the magnet.
  • Surface finish – ideal contact is obtained only on polished steel. Rough texture reduce the real contact area, weakening the magnet.
  • Operating temperature – NdFeB sinters have a negative temperature coefficient. At higher temperatures they are weaker, and in frost they can be stronger (up to a certain limit).

Holding force was tested on the plate surface of 20 mm thickness, when a perpendicular force was applied, in contrast under attempts to slide the magnet the holding force is lower. Moreover, even a minimal clearance between the magnet’s surface and the plate lowers the lifting capacity.

Warnings
Dust explosion hazard

Fire hazard: Neodymium dust is explosive. Do not process magnets without safety gear as this risks ignition.

Do not overheat magnets

Standard neodymium magnets (grade N) undergo demagnetization when the temperature surpasses 80°C. Damage is permanent.

GPS and phone interference

Remember: rare earth magnets produce a field that disrupts precision electronics. Maintain a safe distance from your phone, tablet, and navigation systems.

Do not give to children

Only for adults. Small elements can be swallowed, causing intestinal necrosis. Store out of reach of kids and pets.

Implant safety

Life threat: Neodymium magnets can turn off heart devices and defibrillators. Do not approach if you have electronic implants.

Allergy Warning

Nickel alert: The nickel-copper-nickel coating contains nickel. If skin irritation appears, cease handling magnets and use protective gear.

Pinching danger

Pinching hazard: The attraction force is so immense that it can result in hematomas, crushing, and broken bones. Protective gloves are recommended.

Magnet fragility

Despite the nickel coating, neodymium is brittle and not impact-resistant. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.

Handling rules

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

Data carriers

Do not bring magnets close to a wallet, computer, or screen. The magnetic field can irreversibly ruin these devices and wipe information from cards.

Security! More info about risks in the article: Safety of working with magnets.