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UMH 48x11x65 [M6] / N38 - magnetic holder with hook

magnetic holder with hook

Catalog no 310430

GTIN/EAN: 5906301814597

5.00

Diameter Ø

48 mm [±1 mm]

Height

65 mm [±1 mm]

Height

11 mm [±1 mm]

Weight

145 g

Magnetization Direction

↑ axial

Load capacity

88.00 kg / 862.99 N

Coating

[NiCuNi] Nickel

see specifications »

68.88 ZŁ with VAT / pcs + price for transport

56.00 ZŁ net + 23% VAT / pcs

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Carbon Footprint – environmental impact GPSR Regulation – product safety
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Detailed specification - UMH 48x11x65 [M6] / N38 - magnetic holder with hook

Specification / characteristics - UMH 48x11x65 [M6] / N38 - magnetic holder with hook

properties
properties values
Cat. no. 310430
GTIN/EAN 5906301814597
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 48 mm [±1 mm]
Height 65 mm [±1 mm]
Height 11 mm [±1 mm]
Weight 145 g
Magnetization Direction ↑ axial
Load capacity ~ ? 88.00 kg / 862.99 N
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMH 48x11x65 [M6] / N38 - magnetic holder with hook
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
Engineering data and GPSR
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%
Environmental data
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: 310430-2025
Magnet Unit Converter
Force (pull)
Magnetic Field
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A hook magnet is an ideal solution for quick mounting of banners, signs, and markings on steel ceiling structures. In workshops and garages, they work perfectly for guiding cables or hanging work lighting.
The magnet has a standard threaded socket, which allows replacing the hook with any other accessory with a thread. Check the thread size in the product specification to select matching replacements.
The given value defines the maximum load when suspended under a thick, horizontal ceiling beam. When mounting on a wall (vertically), the holding force is much lower due to shear force (the magnet may slide).
The cup acts as a magnetic armature, intensifying the neodymium action and increasing efficiency. The housing ensures mechanical durability, which is important in industrial and assembly conditions.
In the bathroom or kitchen, they will work perfectly, provided they are not directly splashed with water. Metal elements can rust with constant contact with atmospheric moisture.

Pros as well as cons of neodymium magnets.

Strengths

Besides their exceptional pulling force, neodymium magnets offer the following advantages:
  • They retain attractive force for around 10 years – the loss is just ~1% (in theory),
  • Magnets effectively resist against loss of magnetization caused by foreign field sources,
  • A magnet with a metallic gold surface has an effective appearance,
  • Magnets have extremely high magnetic induction on the outer side,
  • Through (adequate) combination of ingredients, they can achieve high thermal resistance, allowing for operation at temperatures approaching 230°C and above...
  • Possibility of individual forming and modifying to complex needs,
  • Fundamental importance in modern industrial fields – they find application in hard drives, drive modules, diagnostic systems, and other advanced devices.
  • Relatively small size with high pulling force – neodymium magnets offer high power in compact dimensions, which enables their usage in compact constructions

Disadvantages

Disadvantages of neodymium magnets:
  • Brittleness is one of their disadvantages. Upon intense impact they can fracture. We recommend keeping them in a strong case, which not only secures them against impacts but also raises their durability
  • Neodymium magnets lose their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
  • When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation and corrosion.
  • Limited possibility of making nuts in the magnet and complicated forms - preferred is a housing - magnet mounting.
  • Potential hazard to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. Furthermore, small components of these products can disrupt the diagnostic process medical after entering the body.
  • With large orders the cost of neodymium magnets can be a barrier,

Holding force characteristics

Highest magnetic holding force – what contributes to it?

The lifting capacity listed is a measurement result conducted under specific, ideal conditions:
  • using a base made of high-permeability steel, acting as a magnetic yoke
  • possessing a thickness of min. 10 mm to ensure full flux closure
  • with an ground contact surface
  • under conditions of gap-free contact (surface-to-surface)
  • for force applied at a right angle (pull-off, not shear)
  • at temperature approx. 20 degrees Celsius

Determinants of lifting force in real conditions

In practice, the real power is determined by several key aspects, presented from most significant:
  • Gap between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by varnish or unevenness) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
  • Force direction – note that the magnet has greatest strength perpendicularly. Under sliding down, the capacity drops drastically, often to levels of 20-30% of the nominal value.
  • Steel thickness – too thin steel does not accept the full field, causing part of the power to be lost to the other side.
  • Plate material – low-carbon steel attracts best. Alloy steels reduce magnetic properties and lifting capacity.
  • Surface finish – full contact is possible only on polished steel. Any scratches and bumps create air cushions, reducing force.
  • Operating temperature – NdFeB sinters have a negative temperature coefficient. When it is hot they lose power, and at low temperatures gain strength (up to a certain limit).

Holding force was checked 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. In addition, even a minimal clearance between the magnet and the plate reduces the holding force.

Precautions when working with NdFeB magnets
Dust explosion hazard

Powder produced during grinding of magnets is self-igniting. Do not drill into magnets unless you are an expert.

Handling rules

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

Keep away from electronics

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

Safe distance

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

Allergic reactions

Certain individuals suffer from a hypersensitivity to nickel, which is the typical protective layer for neodymium magnets. Frequent touching may cause an allergic reaction. It is best to use protective gloves.

Physical harm

Large magnets can break fingers in a fraction of a second. Do not place your hand betwixt two attracting surfaces.

Swallowing risk

Absolutely store magnets away from children. Ingestion danger is significant, and the consequences of magnets clamping inside the body are very dangerous.

Pacemakers

For implant holders: Strong magnetic fields disrupt medical devices. Maintain at least 30 cm distance or request help to handle the magnets.

Magnets are brittle

Despite metallic appearance, the material is delicate and not impact-resistant. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.

Permanent damage

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

Important! Looking for details? Check our post: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98