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UMH 42x9x46 [M6] / N38 - magnetic holder with hook

magnetic holder with hook

Catalog no 310429

GTIN/EAN: 5906301814580

5.00

Diameter Ø

42 mm [±1 mm]

Height

46 mm [±1 mm]

Height

9 mm [±1 mm]

Weight

90 g

Magnetization Direction

↑ axial

Load capacity

66.00 kg / 647.24 N

Coating

[NiCuNi] Nickel

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35.99 ZŁ with VAT / pcs + price for transport

29.26 ZŁ net + 23% VAT / pcs

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Specifications as well as shape of a neodymium magnet can be analyzed on our modular calculator.

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Technical data of the product - UMH 42x9x46 [M6] / N38 - magnetic holder with hook

Specification / characteristics - UMH 42x9x46 [M6] / N38 - magnetic holder with hook

properties
properties values
Cat. no. 310429
GTIN/EAN 5906301814580
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 42 mm [±1 mm]
Height 46 mm [±1 mm]
Height 9 mm [±1 mm]
Weight 90 g
Magnetization Direction ↑ axial
Load capacity ~ ? 66.00 kg / 647.24 N
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMH 42x9x46 [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
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%
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: 310429-2025
Measurement Calculator
Force (pull)
Magnetic Induction
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Holders with a hook are indispensable in large-format stores and warehouses for suspending advertisements (POS systems). It is a universal hanger that you can move to another place at any time without a trace.
The tip is fully demountable - you can unscrew the hook and screw in a bolt, eyelet, or other element in its place. 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).
Thanks to the metal cover, attraction force is concentrated, which significantly increases capacity compared to a bare magnet. The housing ensures mechanical durability, which is important in industrial and assembly conditions.
For outdoor use (in rain), metal hangers may eventually develop a rusty coating over time. In home and office conditions, they will serve for many years without signs of wear.

Strengths as well as weaknesses of rare earth magnets.

Pros

Besides their exceptional magnetic power, neodymium magnets offer the following advantages:
  • They retain magnetic properties for around 10 years – the loss is just ~1% (based on simulations),
  • They do not lose their magnetic properties even under external field action,
  • A magnet with a smooth silver surface has better aesthetics,
  • Magnets have excellent magnetic induction on the outer layer,
  • Thanks to resistance to high temperature, they are capable of working (depending on the shape) even at temperatures up to 230°C and higher...
  • Thanks to modularity in constructing and the capacity to customize to client solutions,
  • Huge importance in modern industrial fields – they serve a role in hard drives, drive modules, diagnostic systems, and other advanced devices.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which allows their use in small systems

Weaknesses

Disadvantages of neodymium magnets:
  • To avoid cracks under impact, we suggest using special steel holders. Such a solution protects the magnet and simultaneously improves its durability.
  • We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
  • They oxidize in a humid environment. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in creating threads and complex shapes in magnets, we recommend using casing - magnetic holder.
  • Possible danger resulting from small fragments of magnets are risky, if swallowed, which gains importance in the context of child health protection. Furthermore, small elements of these devices are able to complicate diagnosis medical after entering the body.
  • Due to neodymium price, their price is higher than average,

Holding force characteristics

Maximum lifting force for a neodymium magnet – what contributes to it?

Breakaway force was defined for optimal configuration, including:
  • using a plate made of mild steel, acting as a ideal flux conductor
  • possessing a massiveness of minimum 10 mm to ensure full flux closure
  • with a surface perfectly flat
  • without the slightest insulating layer between the magnet and steel
  • under vertical application of breakaway force (90-degree angle)
  • at ambient temperature approx. 20 degrees Celsius

Lifting capacity in real conditions – factors

Effective lifting capacity impacted by working environment parameters, mainly (from priority):
  • Clearance – existence of any layer (paint, dirt, gap) acts as an insulator, which reduces capacity steeply (even by 50% at 0.5 mm).
  • Load vector – highest force is reached only during pulling at a 90° angle. The resistance to sliding of the magnet along the surface is standardly several times smaller (approx. 1/5 of the lifting capacity).
  • Element thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal limits the attraction force (the magnet "punches through" it).
  • Plate material – low-carbon steel gives the best results. Alloy admixtures lower magnetic permeability and lifting capacity.
  • Surface condition – smooth surfaces guarantee perfect abutment, which improves field saturation. Rough surfaces reduce efficiency.
  • Temperature influence – hot environment weakens pulling force. Too high temperature can permanently demagnetize the magnet.

Holding force was measured on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, however under shearing force the load capacity is reduced by as much as 5 times. Additionally, even a minimal clearance between the magnet’s surface and the plate reduces the load capacity.

H&S for magnets
Physical harm

Protect your hands. Two large magnets will join instantly with a force of several hundred kilograms, crushing anything in their path. Exercise extreme caution!

Eye protection

Despite the nickel coating, neodymium is brittle and not impact-resistant. Do not hit, as the magnet may crumble into hazardous fragments.

Electronic hazard

Very strong magnetic fields can corrupt files on payment cards, hard drives, and other magnetic media. Maintain a gap of min. 10 cm.

Respect the power

Handle magnets with awareness. Their huge power can surprise even experienced users. Stay alert and do not underestimate their power.

Warning for heart patients

Individuals with a heart stimulator have to keep an safe separation from magnets. The magnetism can stop the functioning of the implant.

Allergy Warning

It is widely known that nickel (the usual finish) is a common allergen. For allergy sufferers, prevent direct skin contact and opt for encased magnets.

This is not a toy

Strictly store magnets out of reach of children. Ingestion danger is significant, and the effects of magnets clamping inside the body are fatal.

Precision electronics

GPS units and smartphones are extremely susceptible to magnetic fields. Direct contact with a strong magnet can ruin the sensors in your phone.

Combustion hazard

Mechanical processing of NdFeB material poses a fire hazard. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.

Do not overheat magnets

Keep cool. Neodymium magnets are sensitive to temperature. If you need operation above 80°C, look for HT versions (H, SH, UH).

Safety First! Want to know more? Read our article: Why are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98