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

magnetic holder with hook

Catalog no 310430

GTIN/EAN: 5906301814597

5.00
Load capacity 88.00 kg / 862.99 N
Diameter Ø
48 mm [±1 mm]
Height
65 mm [±1 mm]
Height
11 mm [±1 mm]
Weight
145 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel
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56.00 zł net / pcs

68.88 zł with VAT (23% VAT) / pcs

price for transport

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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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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 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 and environmental data

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%

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: 310430-2026
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They serve to create mobile suspension points without the need to drill holes in beams. You can use them to organize wires, hang tools, or clothes on metal racks.
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.
You will get the greatest force by mounting the magnet on a thick, smooth steel surface vertically. If you hang the magnet on a wall, the real capacity is approx. 20-30% of the nominal value.
Thanks to the metal cover, attraction force is concentrated, which significantly increases capacity compared to a bare magnet. Additionally, steel protects the brittle magnet from cracking upon hitting the ceiling or beam.
For outdoor use (in rain), metal hangers may eventually develop a rusty coating over time. If you are looking for an outdoor hanger, choose a model in rubberized or plastic housing, which is tight.

Advantages and disadvantages of Nd2Fe14B magnets.

Strengths

Apart from their strong power, neodymium magnets have these key benefits:
  • Their strength is maintained, and after approximately ten years it drops only by ~1% (according to research),
  • Neodymium magnets are extremely resistant to magnetic field loss caused by external magnetic fields,
  • A magnet with a shiny nickel surface is more attractive,
  • Magnetic induction on the working part of the magnet remains maximum,
  • Through (appropriate) combination of ingredients, they can achieve high thermal strength, enabling operation at temperatures reaching 230°C and above...
  • Thanks to freedom in constructing and the ability to modify to specific needs,
  • Significant place in electronics industry – they are utilized in data components, motor assemblies, diagnostic systems, also industrial machines.
  • Thanks to efficiency per cm³, small magnets offer high operating force, occupying minimum space,

Limitations

What to avoid - cons of neodymium magnets: application proposals
  • Susceptibility to cracking is one of their disadvantages. Upon strong impact they can fracture. We advise keeping them in a strong case, which not only secures them against impacts but also raises their durability
  • Neodymium 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
  • Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture, when using outdoors
  • Due to limitations in producing nuts and complex forms in magnets, we recommend using a housing - magnetic holder.
  • Potential hazard to health – tiny shards of magnets are risky, if swallowed, which is particularly important in the context of child health protection. It is also worth noting that tiny parts of these magnets can disrupt the diagnostic process medical in case of swallowing.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Holding force characteristics

Maximum lifting capacity of the magnet – what contributes to it?

The lifting capacity listed is a measurement result performed under the following configuration:
  • using a sheet made of mild steel, acting as a ideal flux conductor
  • whose thickness reaches at least 10 mm
  • characterized by lack of roughness
  • with direct contact (without paint)
  • for force applied at a right angle (pull-off, not shear)
  • at room temperature

Lifting capacity in practice – influencing factors

Holding efficiency is influenced by specific conditions, such as (from most important):
  • Space between magnet and steel – even a fraction of a millimeter of separation (caused e.g. by veneer or unevenness) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
  • Pull-off angle – note that the magnet holds strongest perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the maximum value.
  • Steel thickness – insufficiently thick sheet does not accept the full field, causing part of the flux to be escaped to the other side.
  • Metal type – different alloys attracts identically. High carbon content worsen the interaction with the magnet.
  • Surface quality – the more even the plate, the better the adhesion and stronger the hold. Unevenness acts like micro-gaps.
  • Thermal factor – high temperature reduces pulling force. Too high temperature can permanently damage the magnet.

Holding force was checked on the plate surface of 20 mm thickness, when the force acted perpendicularly, however under shearing force the load capacity is reduced by as much as 75%. In addition, even a minimal clearance between the magnet’s surface and the plate decreases the holding force.

Safe handling of NdFeB magnets
Do not underestimate power

Handle with care. Neodymium magnets attract from a distance and connect with massive power, often faster than you can move away.

Metal Allergy

A percentage of the population suffer from a sensitization to nickel, which is the standard coating for neodymium magnets. Extended handling may cause a rash. We strongly advise use safety gloves.

Maximum temperature

Control the heat. Heating the magnet above 80 degrees Celsius will permanently weaken its properties and strength.

Precision electronics

A powerful magnetic field interferes with the operation of magnetometers in smartphones and navigation systems. Do not bring magnets near a smartphone to prevent damaging the sensors.

Danger to the youngest

Always keep magnets away from children. Choking hazard is significant, and the effects of magnets connecting inside the body are fatal.

Dust explosion hazard

Combustion risk: Neodymium dust is explosive. Avoid machining magnets in home conditions as this may cause fire.

Eye protection

Protect your eyes. Magnets can explode upon violent connection, launching shards into the air. Eye protection is mandatory.

Pinching danger

Large magnets can break fingers in a fraction of a second. Do not put your hand between two strong magnets.

Electronic hazard

Device Safety: Strong magnets can ruin data carriers and sensitive devices (heart implants, hearing aids, timepieces).

ICD Warning

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

Attention! Looking for details? Read our article: Why are neodymium magnets dangerous?