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Powerful neodymium magnets: discs and cylinders

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Proven solutions for fixing non-invasive. Threaded grips (M8, M10, M12) provide instant organization of work on production halls. They are indispensable mounting lighting, detectors and banners.

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UMH 36x8x46 [M6] / N38 - magnetic holder with hook

magnetic holder with hook

Catalog no 310428

GTIN/EAN: 5906301814573

5.00

Diameter Ø

36 mm [±1 mm]

Height

46 mm [±1 mm]

Height

8 mm [±1 mm]

Weight

65 g

Magnetization Direction

↑ axial

Load capacity

43.00 kg / 421.69 N

Coating

[NiCuNi] Nickel

view parameters »

26.64 ZŁ with VAT / pcs + price for transport

21.66 ZŁ net + 23% VAT / pcs

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Lifting power as well as shape of neodymium magnets can be analyzed using our online calculation tool.

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Detailed specification - UMH 36x8x46 [M6] / N38 - magnetic holder with hook

Specification / characteristics - UMH 36x8x46 [M6] / N38 - magnetic holder with hook

properties
properties values
Cat. no. 310428
GTIN/EAN 5906301814573
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 36 mm [±1 mm]
Height 46 mm [±1 mm]
Height 8 mm [±1 mm]
Weight 65 g
Magnetization Direction ↑ axial
Load capacity ~ ? 43.00 kg / 421.69 N
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMH 36x8x46 [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%
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: 310428-2026
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Pulling force
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A hook magnet is an ideal solution for quick mounting of banners, signs, and markings on steel ceiling structures. You can use them to organize wires, hang tools, or clothes on metal racks.
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. For heavy ceiling ads or tools, we recommend choosing a magnet with a considerable power reserve.
The steel housing (cup) shields the magnetic field, directing all its power downwards, onto the contact surface. 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. Metal elements can rust with constant contact with atmospheric moisture.

Strengths as well as weaknesses of rare earth magnets.

Strengths

Apart from their strong holding force, neodymium magnets have these key benefits:
  • They retain magnetic properties for almost 10 years – the drop is just ~1% (in theory),
  • They are noted for resistance to demagnetization induced by presence of other magnetic fields,
  • The use of an refined finish of noble metals (nickel, gold, silver) causes the element to present itself better,
  • Magnets are distinguished by very high magnetic induction on the working surface,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • Thanks to versatility in designing and the capacity to modify to unusual requirements,
  • Huge importance in innovative solutions – they are utilized in mass storage devices, brushless drives, diagnostic systems, as well as multitasking production systems.
  • Thanks to their power density, small magnets offer high operating force, occupying minimum space,

Cons

Disadvantages of neodymium magnets:
  • To avoid cracks under impact, we suggest using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
  • We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
  • Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material stable to moisture, when using outdoors
  • We suggest a housing - magnetic holder, due to difficulties in producing threads inside the magnet and complicated forms.
  • Possible danger related to microscopic parts of magnets pose a threat, when accidentally swallowed, which is particularly important in the aspect of protecting the youngest. Additionally, small components of these devices can be problematic in diagnostics medical in case of swallowing.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Holding force characteristics

Magnetic strength at its maximum – what it depends on?

The specified lifting capacity refers to the maximum value, measured under ideal test conditions, specifically:
  • using a plate made of mild steel, functioning as a magnetic yoke
  • with a thickness no less than 10 mm
  • with a plane cleaned and smooth
  • with direct contact (no impurities)
  • under perpendicular force vector (90-degree angle)
  • at ambient temperature approx. 20 degrees Celsius

Determinants of lifting force in real conditions

Effective lifting capacity impacted by working environment parameters, such as (from most important):
  • Clearance – existence of any layer (paint, dirt, air) interrupts the magnetic circuit, which lowers capacity rapidly (even by 50% at 0.5 mm).
  • Direction of force – maximum parameter is available only during perpendicular pulling. The force required to slide of the magnet along the plate is usually several times smaller (approx. 1/5 of the lifting capacity).
  • Steel thickness – too thin plate causes magnetic saturation, causing part of the power to be escaped into the air.
  • Steel type – mild steel attracts best. Higher carbon content decrease magnetic properties and lifting capacity.
  • Surface quality – the more even the plate, the larger the contact zone and stronger the hold. Unevenness creates an air distance.
  • Heat – neodymium magnets have a negative temperature coefficient. At higher temperatures they lose power, and in frost they can be stronger (up to a certain limit).

Lifting capacity testing was conducted on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, whereas under shearing force the lifting capacity is smaller. Additionally, even a small distance between the magnet and the plate reduces the holding force.

Safe handling of NdFeB magnets
Finger safety

Mind your fingers. Two large magnets will snap together instantly with a force of several hundred kilograms, crushing everything in their path. Be careful!

Avoid contact if allergic

Allergy Notice: The nickel-copper-nickel coating contains nickel. If an allergic reaction happens, cease working with magnets and use protective gear.

Compass and GPS

A powerful magnetic field negatively affects the operation of compasses in phones and GPS navigation. Keep magnets near a smartphone to avoid damaging the sensors.

Keep away from children

Product intended for adults. Small elements can be swallowed, leading to intestinal necrosis. Keep away from kids and pets.

Respect the power

Exercise caution. Neodymium magnets act from a long distance and snap with massive power, often quicker than you can move away.

Danger to pacemakers

Individuals with a ICD must maintain an large gap from magnets. The magnetic field can stop the functioning of the implant.

Do not drill into magnets

Drilling and cutting of neodymium magnets poses a fire risk. Magnetic powder reacts violently with oxygen and is hard to extinguish.

Fragile material

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

Demagnetization risk

Control the heat. Heating the magnet to high heat will permanently weaken its properties and pulling force.

Safe distance

Avoid bringing magnets close to a wallet, computer, or screen. The magnetic field can permanently damage these devices and wipe information from cards.

Important! More info about risks in the article: Magnet Safety Guide.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98