← previous
Product available Ships today (order by 14:00)

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

view technical specifications »

202.95 ZŁ with VAT / pcs + price for transport

165.00 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?
price from 1 pcs
165.00 ZŁ
202.95 ZŁ
price from 5 pcs
145.20 ZŁ
178.60 ZŁ
Carbon Footprint – environmental impact GPSR Regulation – product safety
Not sure where to buy?

Pick up the phone and ask +48 22 499 98 98 if you prefer contact us through inquiry form the contact section.
Weight along with appearance of magnetic components can be verified using our magnetic mass calculator.

Order by 14:00 and we’ll ship today!

Technical of the product - 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
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%
Sustainability
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
Measurement Calculator
Pulling force
Magnetic Induction
Input data in one of the inputs, and the rest change on the fly.

Other deals

SM 32x475 [2xM8] / N52 - magnetic separator
Product available Ships today (order by 14:00)

SM 32x475 [2xM8] / N52 - magnetic separator

1488.30 ZŁ brutto / pcs
UMH 16x5x32 [M4] / N38 - magnetic holder with hook
Product available Ships today (order by 14:00)

UMH 16x5x32 [M4] / N38 - magnetic holder with hook

4.88 ZŁ brutto / pcs
MW 12.5x2 / N38 - cylindrical magnet
Product available Ships today (order by 14:00)

MW 12.5x2 / N38 - cylindrical magnet

0.935 ZŁ brutto / pcs
SM 25x150 [2xM8] / N52 - magnetic separator
Product available Ships today (order by 14:00)

SM 25x150 [2xM8] / N52 - magnetic separator

467.40 ZŁ brutto / pcs
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 steel housing (cup) shields the magnetic field, directing all its power downwards, onto the contact surface. Additionally, steel protects the brittle magnet from cracking upon hitting the ceiling or beam.
In the bathroom or kitchen, they will work perfectly, provided they are not directly splashed with water. If you are looking for an outdoor hanger, choose a model in rubberized or plastic housing, which is tight.

Strengths and weaknesses of neodymium magnets.

Pros

Besides their durability, neodymium magnets are valued for these benefits:
  • They do not lose strength, even after approximately ten years – the reduction in lifting capacity is only ~1% (according to tests),
  • They show high resistance to demagnetization induced by external field influence,
  • Thanks to the reflective finish, the plating of nickel, gold, or silver gives an modern appearance,
  • Magnetic induction on the top side of the magnet is maximum,
  • Through (appropriate) combination of ingredients, they can achieve high thermal strength, allowing for action at temperatures reaching 230°C and above...
  • Thanks to versatility in constructing and the capacity to adapt to individual projects,
  • Universal use in high-tech industry – they find application in computer drives, electric motors, medical devices, also industrial machines.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which makes them useful in small systems

Limitations

Disadvantages of neodymium magnets:
  • Susceptibility to cracking is one of their disadvantages. Upon intense impact they can fracture. We advise keeping them in a steel housing, which not only protects them against impacts but also raises their durability
  • Neodymium magnets lose power when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening 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 extremely resistant to heat
  • Magnets exposed to a humid environment can rust. Therefore when using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
  • Limited possibility of creating threads in the magnet and complicated shapes - preferred is cover - mounting mechanism.
  • Possible danger to health – tiny shards of magnets pose a threat, when accidentally swallowed, which is particularly important in the context of child safety. It is also worth noting that small elements of these products are able to complicate diagnosis 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

Breakaway strength of the magnet in ideal conditions – what contributes to it?

Information about lifting capacity is the result of a measurement for optimal configuration, assuming:
  • on a base made of structural steel, perfectly concentrating the magnetic field
  • with a thickness of at least 10 mm
  • characterized by even structure
  • with zero gap (no coatings)
  • during detachment in a direction perpendicular to the plane
  • at room temperature

Magnet lifting force in use – key factors

In real-world applications, the actual lifting capacity depends on a number of factors, listed from most significant:
  • Air gap (between the magnet and the plate), as even a tiny clearance (e.g. 0.5 mm) leads to a drastic drop in lifting capacity by up to 50% (this also applies to varnish, rust or dirt).
  • Pull-off angle – 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.
  • Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of converting into lifting capacity.
  • Material type – the best choice is high-permeability steel. Cast iron may generate lower lifting capacity.
  • Smoothness – ideal contact is obtained only on polished steel. Rough texture reduce the real contact area, reducing force.
  • Thermal factor – high temperature reduces magnetic field. Too high temperature can permanently damage the magnet.

Lifting capacity testing was conducted on plates with a smooth surface of suitable thickness, under perpendicular forces, in contrast under parallel forces the load capacity is reduced by as much as 75%. Moreover, even a minimal clearance between the magnet’s surface and the plate reduces the load capacity.

Safety rules for work with NdFeB magnets
Maximum temperature

Monitor thermal conditions. Heating the magnet above 80 degrees Celsius will permanently weaken its magnetic structure and pulling force.

Caution required

Before use, read the rules. Sudden snapping can break the magnet or hurt your hand. Think ahead.

Do not give to children

Only for adults. Small elements pose a choking risk, leading to serious injuries. Keep out of reach of kids and pets.

Magnetic interference

Note: rare earth magnets generate a field that confuses sensitive sensors. Maintain a separation from your mobile, tablet, and navigation systems.

Medical interference

Warning for patients: Strong magnetic fields affect electronics. Keep minimum 30 cm distance or request help to handle the magnets.

Finger safety

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

Electronic devices

Avoid bringing magnets close to a wallet, laptop, or screen. The magnetic field can permanently damage these devices and erase data from cards.

Allergy Warning

Warning for allergy sufferers: The nickel-copper-nickel coating contains nickel. If redness happens, immediately stop working with magnets and wear gloves.

Risk of cracking

Despite metallic appearance, the material is delicate and cannot withstand shocks. Do not hit, as the magnet may crumble into hazardous fragments.

Dust explosion hazard

Powder produced during grinding of magnets is flammable. Avoid drilling into magnets unless you are an expert.

Danger! Details about hazards in the article: Magnet Safety Guide.