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UMH 75x18x68 [M8] / N38 - magnetic holder with hook

magnetic holder with hook

Catalog no 310432

GTIN/EAN: 5906301814610

5.00

Diameter Ø

75 mm [±1 mm]

Height

68 mm [±1 mm]

Height

18 mm [±1 mm]

Weight

625 g

Magnetization Direction

↑ axial

Load capacity

162.00 kg / 1588.68 N

Coating

[NiCuNi] Nickel

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202.95 ZŁ with VAT / pcs + price for transport

165.00 ZŁ net + 23% VAT / pcs

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Product card - UMH 75x18x68 [M8] / N38 - magnetic holder with hook

Specification / characteristics - UMH 75x18x68 [M8] / N38 - magnetic holder with hook

properties
properties values
Cat. no. 310432
GTIN/EAN 5906301814610
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 75 mm [±1 mm]
Height 68 mm [±1 mm]
Height 18 mm [±1 mm]
Weight 625 g
Magnetization Direction ↑ axial
Load capacity ~ ? 162.00 kg / 1588.68 N
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMH 75x18x68 [M8] / 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
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: 310432-2026
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Pulling force
Field Strength
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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.
The nominal capacity (e.g., 162.00 kg) refers to perpendicular (vertical) force when mounted on the ceiling. 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.

Advantages as well as disadvantages of neodymium magnets.

Advantages

In addition to their magnetic capacity, neodymium magnets provide the following advantages:
  • They retain attractive force for almost ten years – the loss is just ~1% (according to analyses),
  • Neodymium magnets are characterized by exceptionally resistant to demagnetization caused by external magnetic fields,
  • By covering with a lustrous layer of gold, the element gains an professional look,
  • The surface of neodymium magnets generates a unique magnetic field – this is a distinguishing feature,
  • Thanks to resistance to high temperature, they are capable of working (depending on the form) even at temperatures up to 230°C and higher...
  • Possibility of custom modeling and optimizing to specific requirements,
  • Versatile presence in modern industrial fields – they find application in magnetic memories, electric motors, medical devices, and technologically advanced constructions.
  • Thanks to concentrated force, small magnets offer high operating force, in miniature format,

Disadvantages

Problematic aspects of neodymium magnets and ways of using them
  • At strong impacts they can break, therefore we recommend placing them in strong housings. A metal housing provides additional protection against damage and increases the magnet's durability.
  • When exposed to high temperature, neodymium magnets experience a drop in power. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation and corrosion.
  • Limited possibility of creating threads in the magnet and complicated shapes - recommended is casing - magnet mounting.
  • Potential hazard related to microscopic parts of magnets are risky, in case of ingestion, which is particularly important in the aspect of protecting the youngest. It is also worth noting that tiny parts of these products are able to disrupt the diagnostic process medical after entering the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Holding force characteristics

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

Holding force of 162.00 kg is a measurement result conducted under standard conditions:
  • using a base made of high-permeability steel, acting as a circuit closing element
  • possessing a thickness of min. 10 mm to ensure full flux closure
  • with an ground contact surface
  • with direct contact (without coatings)
  • under vertical force vector (90-degree angle)
  • at ambient temperature approx. 20 degrees Celsius

Practical lifting capacity: influencing factors

Bear in mind that the application force will differ subject to the following factors, in order of importance:
  • Gap (betwixt the magnet and the metal), since even a microscopic clearance (e.g. 0.5 mm) can cause a drastic drop in force by up to 50% (this also applies to paint, rust or debris).
  • Force direction – remember that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops significantly, often to levels of 20-30% of the nominal value.
  • Element thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet limits the lifting capacity (the magnet "punches through" it).
  • Material type – the best choice is pure iron steel. Hardened steels may have worse magnetic properties.
  • Smoothness – full contact is possible only on polished steel. Any scratches and bumps create air cushions, reducing force.
  • Thermal conditions – NdFeB sinters have a negative temperature coefficient. At higher temperatures they are weaker, and at low temperatures they can be stronger (up to a certain limit).

Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, in contrast under attempts to slide the magnet the load capacity is reduced by as much as 5 times. Additionally, even a slight gap between the magnet’s surface and the plate decreases the lifting capacity.

Safe handling of NdFeB magnets
Health Danger

For implant holders: Strong magnetic fields affect electronics. Keep minimum 30 cm distance or ask another person to handle the magnets.

Magnets are brittle

Despite the nickel coating, the material is delicate and cannot withstand shocks. Do not hit, as the magnet may shatter into hazardous fragments.

Safe operation

Handle magnets with awareness. Their huge power can shock even professionals. Be vigilant and respect their force.

Hand protection

Mind your fingers. Two large magnets will join immediately with a force of several hundred kilograms, destroying everything in their path. Be careful!

Adults only

Neodymium magnets are not intended for children. Swallowing several magnets may result in them connecting inside the digestive tract, which constitutes a severe health hazard and requires immediate surgery.

Data carriers

Device Safety: Neodymium magnets can damage payment cards and delicate electronics (pacemakers, medical aids, mechanical watches).

Fire risk

Mechanical processing of neodymium magnets poses a fire hazard. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.

Compass and GPS

GPS units and mobile phones are highly sensitive to magnetic fields. Direct contact with a powerful NdFeB magnet can ruin the sensors in your phone.

Thermal limits

Standard neodymium magnets (grade N) lose power when the temperature exceeds 80°C. The loss of strength is permanent.

Nickel coating and allergies

Studies show that the nickel plating (standard magnet coating) is a common allergen. If your skin reacts to metals, avoid direct skin contact or choose coated magnets.

Caution! Want to know more? Check our post: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98