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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
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31.63 zł net + 23% VAT / pcs

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Physical properties - 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
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 and environmental data

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%

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: 370479-2026
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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). The steel housing strengthens attraction force and protects the magnet from cracking.
We recommend manual tightening with feeling to not crush the magnetic ring. It is worth using a washer if the screw head is small to distribute pressure.
Model HH 36x7.5 [M6] / N38 has a holding force of approx. 26.00 kg on thick steel. It is a very efficient solution of small thickness, ensuring high power.
They are commonly used in carpentry as strong furniture latches. Great as mounting points in advertising and exhibition.
The product is intended mainly for use in dry rooms. For outdoor applications, we recommend additional protection with varnish or choosing a rubberized version.

Pros and cons of neodymium magnets.

Pros

Apart from their consistent power, neodymium magnets have these key benefits:
  • Their power is maintained, and after approximately ten years it decreases only by ~1% (theoretically),
  • They show high resistance to demagnetization induced by external field influence,
  • In other words, due to the shiny surface of nickel, the element is aesthetically pleasing,
  • They are known for high magnetic induction at the operating surface, making them more effective,
  • Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
  • Possibility of custom forming and modifying to atypical requirements,
  • Universal use in modern technologies – they are used in magnetic memories, drive modules, diagnostic systems, and industrial machines.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Weaknesses

Disadvantages of neodymium magnets:
  • They are prone to damage upon too strong impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only shields the magnet but also improves its resistance to damage
  • We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
  • They rust in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
  • Limited possibility of creating threads in the magnet and complicated forms - recommended is a housing - mounting mechanism.
  • Health risk to health – tiny shards of magnets are risky, when accidentally swallowed, which gains importance in the context of child safety. Additionally, small components of these magnets can be problematic in diagnostics medical after entering the body.
  • With mass production the cost of neodymium magnets is a challenge,

Lifting parameters

Magnetic strength at its maximum – what contributes to it?

The lifting capacity listed is a result of laboratory testing executed under the following configuration:
  • using a base made of mild steel, serving as a ideal flux conductor
  • whose transverse dimension equals approx. 10 mm
  • with an ideally smooth touching surface
  • with total lack of distance (no coatings)
  • under vertical application of breakaway force (90-degree angle)
  • in temp. approx. 20°C

Key elements affecting lifting force

It is worth knowing that the working load may be lower influenced by the following factors, starting with the most relevant:
  • Distance – the presence of any layer (rust, dirt, gap) interrupts the magnetic circuit, which reduces capacity steeply (even by 50% at 0.5 mm).
  • Direction of force – highest force is reached only during pulling at a 90° angle. The force required to slide of the magnet along the plate is typically several times smaller (approx. 1/5 of the lifting capacity).
  • Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of generating force.
  • Metal type – different alloys reacts the same. Alloy additives weaken the attraction effect.
  • Surface finish – ideal contact is possible only on smooth steel. Rough texture create air cushions, reducing force.
  • Heat – NdFeB sinters have a negative temperature coefficient. When it is hot they are weaker, and in frost they can be stronger (up to a certain limit).

Lifting capacity testing was conducted on a smooth plate of optimal thickness, under a perpendicular pulling force, however under shearing force the lifting capacity is smaller. Additionally, even a small distance between the magnet’s surface and the plate reduces the load capacity.

Safety rules for work with neodymium magnets
Fire risk

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

Magnetic interference

GPS units and smartphones are extremely sensitive to magnetic fields. Direct contact with a strong magnet can decalibrate the internal compass in your phone.

Implant safety

Individuals with a heart stimulator have to keep an safe separation from magnets. The magnetic field can interfere with the functioning of the life-saving device.

Beware of splinters

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

Hand protection

Protect your hands. Two large magnets will snap together instantly with a force of massive weight, destroying everything in their path. Be careful!

Heat sensitivity

Monitor thermal conditions. Exposing the magnet above 80 degrees Celsius will ruin its properties and strength.

Protect data

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

Avoid contact if allergic

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

This is not a toy

Adult use only. Tiny parts can be swallowed, leading to intestinal necrosis. Keep away from kids and pets.

Handling rules

Handle magnets consciously. Their huge power can shock even experienced users. Plan your moves and do not underestimate their power.

Warning! Want to know more? Read our article: Why are neodymium magnets dangerous?