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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

see technical data »

202.95 ZŁ with VAT / pcs + price for transport

165.00 ZŁ net + 23% VAT / pcs

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Want to talk magnets?

Give us a call +48 888 99 98 98 otherwise contact us through contact form through our site.
Lifting power and shape of neodymium magnets can be estimated using our magnetic mass calculator.

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Technical details - 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
Technical specification and ecology
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: 310432-2026
Magnet Unit Converter
Force (pull)
Field Strength
Insert a number in one of the inputs, and all other values change automatically.

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They serve to create mobile suspension points without the need to drill holes in beams. It is a universal hanger that you can move to another place at any time without a trace.
The magnet has a standard threaded socket, which allows replacing the hook with any other accessory with a thread. This gives huge application flexibility and allows adapting the holder to current needs.
The nominal capacity (e.g., 162.00 kg) refers to perpendicular (vertical) force when mounted on the ceiling. If you hang the magnet on a wall, the real capacity is approx. 20-30% of the nominal value.
The steel housing (cup) shields the magnetic field, directing all its power downwards, onto the contact surface. A bare magnet could crack upon sudden application to metal, and the holder is resistant to this.
In the bathroom or kitchen, they will work perfectly, provided they are not directly splashed with water. In home and office conditions, they will serve for many years without signs of wear.

Pros as well as cons of rare earth magnets.

Benefits

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • Their strength is maintained, and after approximately 10 years it drops only by ~1% (according to research),
  • They show high resistance to demagnetization induced by external magnetic fields,
  • A magnet with a smooth nickel surface is more attractive,
  • Magnets possess excellent magnetic induction on the working surface,
  • Through (adequate) combination of ingredients, they can achieve high thermal resistance, enabling action at temperatures reaching 230°C and above...
  • Thanks to freedom in constructing and the ability to adapt to complex applications,
  • Versatile presence in future technologies – they find application in data components, electric motors, precision medical tools, also modern systems.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Limitations

Disadvantages of neodymium magnets:
  • At very strong impacts they can crack, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage and increases the magnet's durability.
  • We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 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 prevent oxidation and corrosion.
  • Due to limitations in realizing nuts and complicated shapes in magnets, we propose using casing - magnetic mount.
  • Possible danger related to microscopic parts of magnets are risky, when accidentally swallowed, which gains importance in the context of child health protection. Furthermore, tiny parts of these magnets are able to complicate diagnosis medical in case of swallowing.
  • With budget limitations the cost of neodymium magnets can be a barrier,

Holding force characteristics

Optimal lifting capacity of a neodymium magnet – what it depends on?

Breakaway force was defined for ideal contact conditions, including:
  • using a plate made of low-carbon steel, acting as a ideal flux conductor
  • with a cross-section of at least 10 mm
  • characterized by lack of roughness
  • under conditions of gap-free contact (metal-to-metal)
  • during pulling in a direction perpendicular to the plane
  • at ambient temperature room level

Determinants of lifting force in real conditions

Bear in mind that the working load will differ influenced by the following factors, in order of importance:
  • Clearance – existence of any layer (rust, tape, air) acts as an insulator, which lowers capacity steeply (even by 50% at 0.5 mm).
  • Angle of force application – highest force is available only during pulling at a 90° angle. The resistance to sliding of the magnet along the plate is typically many times lower (approx. 1/5 of the lifting capacity).
  • Steel thickness – too thin sheet does not accept the full field, causing part of the flux to be escaped to the other side.
  • Plate material – low-carbon steel attracts best. Alloy steels reduce magnetic permeability and lifting capacity.
  • Surface finish – full contact is obtained only on smooth steel. Rough texture create air cushions, weakening the magnet.
  • Temperature influence – hot environment reduces pulling force. Exceeding the limit temperature can permanently damage the magnet.

Lifting capacity was assessed using a polished steel plate of suitable thickness (min. 20 mm), under perpendicular detachment force, however under shearing force the holding force is lower. Additionally, even a slight gap between the magnet and the plate decreases the load capacity.

Safety rules for work with neodymium magnets
Crushing force

Protect your hands. Two large magnets will join instantly with a force of several hundred kilograms, destroying anything in their path. Be careful!

Protective goggles

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

Do not drill into magnets

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

Operating temperature

Monitor thermal conditions. Heating the magnet to high heat will ruin its properties and strength.

Electronic devices

Data protection: Strong magnets can ruin payment cards and sensitive devices (pacemakers, medical aids, mechanical watches).

Danger to pacemakers

Warning for patients: Powerful magnets affect electronics. Maintain minimum 30 cm distance or request help to handle the magnets.

GPS and phone interference

GPS units and smartphones are highly susceptible to magnetic fields. Direct contact with a powerful NdFeB magnet can ruin the internal compass in your phone.

Warning for allergy sufferers

Allergy Notice: The Ni-Cu-Ni coating consists of nickel. If redness occurs, immediately stop working with magnets and wear gloves.

Handling rules

Before use, read the rules. Uncontrolled attraction can destroy the magnet or injure your hand. Be predictive.

Swallowing risk

These products are not toys. Accidental ingestion of multiple magnets may result in them attracting across intestines, which constitutes a direct threat to life and requires immediate surgery.

Caution! Looking for details? Check our post: Why are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98