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UMS 36x10.5x6.5x8 / N38 - conical magnetic holder

conical magnetic holder

Catalog no 220330

GTIN/EAN: 5906301814207

5.00
Load capacity 29.00 kg / 284.39 N
Diameter Ø
36 mm [±1 mm]
cone dimension Ø
10.5x6.5 mm [±1 mm]
Height
8 mm [±1 mm]
Weight
45 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

view properties »

18.65 zł net / pcs

22.94 zł with VAT (23% VAT) / pcs

price for transport

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price from 20 pcs
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Frequently asked questions

How much will a magnetic holder hold in practice?
The catalogue value assumes full contact with smooth steel at least 10 mm thick and a perpendicular pull. Thinner sheet, paint, rust and surface irregularities reduce it considerably: on 1 mm sheet about half remains. Lifting and vertical mounting call for an additional safety margin.
Will a holder work on stainless steel?
Not on austenitic grades 304 and 316 — they are effectively non-magnetic. It will not work on aluminium, copper or brass either. Those materials need a mechanical gripper.
Which coating for which conditions?
Nickel-copper-nickel (NiCuNi) is the standard and covers most applications. Epoxy is used for damp environments and outdoor work, zinc is sufficient for dry interiors. Holders in a steel housing or in rubber also protect the magnet against impact.

Guides from the knowledge base

Want to talk magnets?

Call us now +48 888 99 98 98 alternatively let us know using contact form the contact section.
Specifications and structure of a neodymium magnet can be estimated using our power calculator.

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Technical - UMS 36x10.5x6.5x8 / N38 - conical magnetic holder

Specification / characteristics - UMS 36x10.5x6.5x8 / N38 - conical magnetic holder

properties
properties values
Cat. no. 220330
GTIN/EAN 5906301814207
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]
cone dimension Ø 10.5x6.5 mm [±1 mm]
Height 8 mm [±1 mm]
Weight 45 g
Magnetization Direction ↑ axial
Load capacity ~ ? 29.00 kg / 284.39 N
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMS 36x10.5x6.5x8 / N38 - conical magnetic holder
properties values units
Remanence Br ? 12.2-12.6 kGs
Remanence Br ? 1220-1260 mT
Coercivity bHc ? 10.8-11.5 kOe
Coercivity bHc ? 860-915 kA/m
Intrinsic coercivity iHc ≥ 12 kOe
Intrinsic coercivity iHc ≥ 955 kA/m
Energy product BHmax ? 36-38 BH max MGOe
Energy product BHmax ? 287-303 BH max KJ/m
Maximum working 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 310 °C
Curie Temperature TF 590 °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

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%

Environmental data

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: 220330-2026
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Countersunk magnets are indispensable in carpentry, furniture making, and modeling as hidden closures. Thanks to the hole with a chamfer (conical), the screw head hides in the magnet, ensuring a flat contact surface. Model UMS 36x10.5x6.5x8 / N38 will successfully hold inspection doors, tools in the workshop, or shop display elements.
Neodymium magnets are sintered ceramics, which means they are very hard but also brittle. 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., 29.00 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). When selecting a magnet for a cabinet, remember that the air gap (e.g., bumpers, seals) weakens the grip.
A magnet in a housing is stronger on one side (from the chamfer side) than a bare magnet of the same dimensions. Furthermore, steel protects the brittle neodymium from mechanical damage when closing cabinets (impacts). The countersunk holder is a professional mounting solution with increased durability.

Pros as well as cons of rare earth magnets.

Strengths

Besides their tremendous field intensity, neodymium magnets offer the following advantages:
  • They retain full power for around 10 years – the drop is just ~1% (based on simulations),
  • Neodymium magnets prove to be exceptionally resistant to magnetic field loss caused by external magnetic fields,
  • The use of an elegant coating of noble metals (nickel, gold, silver) causes the element to present itself better,
  • Magnetic induction on the working layer of the magnet turns out to be maximum,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can work (depending on the shape) even at a temperature of 230°C or more...
  • Thanks to freedom in designing and the capacity to adapt to individual projects,
  • Versatile presence in advanced technology sectors – they find application in mass storage devices, electromotive mechanisms, advanced medical instruments, also complex engineering applications.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in compact dimensions, which allows their use in miniature devices

Limitations

Characteristics of disadvantages of neodymium magnets: weaknesses and usage proposals
  • To avoid cracks under impact, we suggest using special steel holders. Such a solution protects the magnet and simultaneously increases its durability.
  • Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape and 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 corrode. Therefore when using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • Due to limitations in producing threads and complex shapes in magnets, we recommend using casing - magnetic mount.
  • Possible danger resulting from small fragments of magnets pose a threat, when accidentally swallowed, which gains importance in the context of child safety. Additionally, small elements of these magnets are able to be problematic in diagnostics medical after entering the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Lifting parameters

Highest magnetic holding force – what contributes to it?

Holding force of 29.00 kg is a result of laboratory testing performed under standard conditions:
  • on a block made of mild steel, optimally conducting the magnetic field
  • whose thickness is min. 10 mm
  • characterized by lack of roughness
  • under conditions of ideal adhesion (surface-to-surface)
  • for force acting at a right angle (pull-off, not shear)
  • at ambient temperature approx. 20 degrees Celsius

Impact of factors on magnetic holding capacity in practice

It is worth knowing that the application force will differ influenced by the following factors, in order of importance:
  • Clearance – existence of any layer (rust, tape, air) acts as an insulator, which reduces capacity rapidly (even by 50% at 0.5 mm).
  • Direction of force – highest force is available only during perpendicular pulling. The resistance to sliding of the magnet along the surface is standardly several times lower (approx. 1/5 of the lifting capacity).
  • Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of converting into lifting capacity.
  • Material type – the best choice is pure iron steel. Stainless steels may attract less.
  • Surface quality – the smoother and more polished the surface, the larger the contact zone and higher the lifting capacity. Roughness creates an air distance.
  • Temperature influence – high temperature reduces magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity testing was carried out on a smooth plate of optimal thickness, under perpendicular forces, in contrast under parallel forces the lifting capacity is smaller. Moreover, even a small distance between the magnet and the plate reduces the load capacity.

Safe handling of neodymium magnets
Shattering risk

Despite metallic appearance, the material is delicate and not impact-resistant. Do not hit, as the magnet may shatter into hazardous fragments.

GPS Danger

A strong magnetic field interferes with the functioning of compasses in phones and navigation systems. Maintain magnets near a smartphone to prevent damaging the sensors.

Safe distance

Device Safety: Neodymium magnets can ruin data carriers and sensitive devices (heart implants, hearing aids, timepieces).

Operating temperature

Regular neodymium magnets (N-type) lose magnetization when the temperature goes above 80°C. The loss of strength is permanent.

Adults only

Neodymium magnets are not toys. Accidental ingestion of several magnets may result in them pinching intestinal walls, which constitutes a critical condition and requires urgent medical intervention.

Avoid contact if allergic

Allergy Notice: The nickel-copper-nickel coating consists of nickel. If skin irritation happens, immediately stop handling magnets and wear gloves.

Handling guide

Before use, check safety instructions. Uncontrolled attraction can break the magnet or injure your hand. Think ahead.

Implant safety

Patients with a ICD have to keep an large gap from magnets. The magnetic field can stop the functioning of the implant.

Crushing risk

Pinching hazard: The pulling power is so great that it can cause hematomas, pinching, and even bone fractures. Protective gloves are recommended.

Machining danger

Drilling and cutting of neodymium magnets poses a fire hazard. Neodymium dust reacts violently with oxygen and is difficult to extinguish.

Warning! Want to know more? Read our article: Why are neodymium magnets dangerous?