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UMS 60x18x8.5x15 / N38 - conical magnetic holder

conical magnetic holder

Catalog no 220404

GTIN/EAN: 5906301814238

5.00

Diameter Ø

60 mm [±1 mm]

cone dimension Ø

18x8.5 mm [±1 mm]

Height

15 mm [±1 mm]

Weight

250 g

Magnetization Direction

↑ axial

Load capacity

112.00 kg / 1098.34 N

Coating

[NiCuNi] Nickel

product parameters »

62.78 ZŁ with VAT / pcs + price for transport

51.04 ZŁ net + 23% VAT / pcs

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Technical parameters - UMS 60x18x8.5x15 / N38 - conical magnetic holder

Specification / characteristics - UMS 60x18x8.5x15 / N38 - conical magnetic holder

properties
properties values
Cat. no. 220404
GTIN/EAN 5906301814238
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 60 mm [±1 mm]
cone dimension Ø 18x8.5 mm [±1 mm]
Height 15 mm [±1 mm]
Weight 250 g
Magnetization Direction ↑ axial
Load capacity ~ ? 112.00 kg / 1098.34 N
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMS 60x18x8.5x15 / N38 - conical magnetic holder
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: 220404-2026
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Countersunk magnets are indispensable in carpentry, furniture making, and modeling as hidden closures. The holder can be screwed directly to wood, wall, metal, or plastic. Model UMS 60x18x8.5x15 / N38 will successfully hold inspection doors, tools in the workshop, or shop display elements.
Remember that neodymium breaks easily if the screw is tightened too hard. We recommend tightening manually with feeling (screwdriver), not an impact driver. The screw head should not protrude above the magnet surface, but it cannot burst it either.
To create a pair (magnet-magnet), you need one holder with an N pole on the chamfer and another with an S pole. In our offer, we try to mark or pair holders if explicitly stated in the description. A set of magnet + plate is cheaper and holds just as strongly.
The declared capacity (e.g., 112.00 kg) refers to the perpendicular force needed to detach the magnet from thick steel. In practice, when mounted on a wall (shear force), the magnet will hold significantly less (approx. 20-30% of nominal). Paint or veneer on metal also reduces effective attraction force.
The steel housing (cup/pot) acts as a magnetic shield, directing all power to the front of the holder. Furthermore, steel protects the brittle neodymium from mechanical damage when closing cabinets (impacts). The countersunk holder is a professional mounting solution with increased durability.

Strengths and weaknesses of rare earth magnets.

Pros

Besides their remarkable magnetic power, neodymium magnets offer the following advantages:
  • They have unchanged lifting capacity, and over more than 10 years their performance decreases symbolically – ~1% (according to theory),
  • Magnets very well protect themselves against demagnetization caused by foreign field sources,
  • Thanks to the smooth finish, the plating of nickel, gold, or silver-plated gives an visually attractive appearance,
  • Neodymium magnets generate maximum magnetic induction on a small area, which allows for strong attraction,
  • Through (appropriate) combination of ingredients, they can achieve high thermal resistance, allowing for functioning at temperatures approaching 230°C and above...
  • Thanks to freedom in shaping and the ability to modify to unusual requirements,
  • Huge importance in high-tech industry – they serve a role in magnetic memories, brushless drives, medical equipment, and multitasking production systems.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which allows their use in compact constructions

Weaknesses

Drawbacks and weaknesses of neodymium magnets: weaknesses and usage proposals
  • They are fragile upon heavy impacts. To avoid cracks, it is worth protecting magnets in a protective case. Such protection not only protects the magnet but also increases its resistance to damage
  • Neodymium magnets lose their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
  • They oxidize in a humid environment. For use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in realizing nuts and complex forms in magnets, we propose using a housing - magnetic mechanism.
  • Health risk related to microscopic parts of magnets are risky, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. It is also worth noting that tiny parts of these devices can disrupt the diagnostic process medical after entering the body.
  • With large orders the cost of neodymium magnets can be a barrier,

Pull force analysis

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

The declared magnet strength concerns the maximum value, recorded under ideal test conditions, specifically:
  • using a sheet made of high-permeability steel, acting as a ideal flux conductor
  • possessing a thickness of min. 10 mm to avoid saturation
  • with a surface free of scratches
  • with zero gap (no paint)
  • during pulling in a direction vertical to the mounting surface
  • in neutral thermal conditions

What influences lifting capacity in practice

Bear in mind that the working load may be lower subject to the following factors, in order of importance:
  • Space between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by varnish or dirt) diminishes the magnet efficiency, often by half at just 0.5 mm.
  • Force direction – remember that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops drastically, often to levels of 20-30% of the maximum value.
  • Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
  • Metal type – different alloys attracts identically. High carbon content worsen the attraction effect.
  • Base smoothness – the smoother and more polished the surface, the larger the contact zone and stronger the hold. Roughness creates an air distance.
  • Temperature – temperature increase results in weakening of force. Check the maximum operating temperature for a given model.

Lifting capacity was determined using a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular pulling force, however under parallel forces the lifting capacity is smaller. Additionally, even a small distance between the magnet’s surface and the plate decreases the load capacity.

H&S for magnets
Maximum temperature

Regular neodymium magnets (N-type) undergo demagnetization when the temperature goes above 80°C. Damage is permanent.

Physical harm

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

No play value

Strictly store magnets out of reach of children. Ingestion danger is significant, and the consequences of magnets connecting inside the body are life-threatening.

Medical interference

Warning for patients: Powerful magnets affect medical devices. Maintain at least 30 cm distance or request help to handle the magnets.

Electronic hazard

Very strong magnetic fields can erase data on credit cards, hard drives, and storage devices. Stay away of min. 10 cm.

Dust explosion hazard

Mechanical processing of neodymium magnets carries a risk of fire risk. Neodymium dust oxidizes rapidly with oxygen and is difficult to extinguish.

Immense force

Before use, check safety instructions. Sudden snapping can destroy the magnet or injure your hand. Think ahead.

Keep away from electronics

Navigation devices and mobile phones are extremely sensitive to magnetism. Direct contact with a powerful NdFeB magnet can permanently damage the sensors in your phone.

Beware of splinters

NdFeB magnets are ceramic materials, which means they are very brittle. Impact of two magnets leads to them breaking into shards.

Warning for allergy sufferers

Studies show that nickel (the usual finish) is a potent allergen. For allergy sufferers, refrain from touching magnets with bare hands and choose encased magnets.

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

e-mail: bok@dhit.pl

tel: +48 888 99 98 98