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

conical magnetic holder

Catalog no 220330

GTIN/EAN: 5906301814207

5.00

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

technical specifications »

22.94 ZŁ with VAT / pcs + price for transport

18.65 ZŁ net + 23% VAT / pcs

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Call us +48 22 499 98 98 otherwise get in touch using contact form through our site.
Lifting power as well as shape of neodymium magnets can be checked using our magnetic calculator.

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Physical properties - 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
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: 220330-2026
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It is the most popular solution for creating aesthetic, invisible door locks. The holder can be screwed directly to wood, wall, metal, or plastic. The steel cup strengthens the magnet force and protects it from cracking upon impact.
Neodymium magnets are sintered ceramics, which means they are very hard but also brittle. It is best to use a screw with a countersunk head perfectly matched to the hole. Using too large a countersunk screw may cause the magnetic ring to crack.
For two magnets screwed with cones facing each other (faces) to attract, they must have different polarity. If you need a pair, ask about availability of complementary sets or check the description. Mounting a magnet to a plate eliminates the problem of matching poles and is easier.
This force is measured in ideal laboratory conditions when pulling at a 90-degree angle. To increase friction and prevent sliding, it is worth sticking a piece of rubber or anti-slip tape on the magnet. 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 neodymium magnets.

Advantages

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:
  • They do not lose magnetism, even after around 10 years – the reduction in lifting capacity is only ~1% (according to tests),
  • They do not lose their magnetic properties even under strong external field,
  • A magnet with a smooth gold surface looks better,
  • They show high magnetic induction at the operating surface, which affects their effectiveness,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • Considering the potential of precise forming and customization to specialized needs, NdFeB magnets can be manufactured in a wide range of forms and dimensions, which amplifies use scope,
  • Versatile presence in advanced technology sectors – they serve a role in mass storage devices, drive modules, advanced medical instruments, also industrial machines.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in compact dimensions, which makes them useful in small systems

Cons

Problematic aspects of neodymium magnets and proposals for their use:
  • Brittleness is one of their disadvantages. Upon strong impact they can fracture. We recommend keeping them in a steel housing, which not only secures them against impacts but also raises their durability
  • NdFeB magnets lose force 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 very resistant to heat
  • They rust in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • We recommend cover - magnetic mechanism, due to difficulties in creating threads inside the magnet and complicated forms.
  • Possible danger resulting from small fragments of magnets are risky, when accidentally swallowed, which gains importance in the context of child health protection. It is also worth noting that tiny parts of these devices are able to be problematic in diagnostics medical when they are in the body.
  • Due to expensive raw materials, their price is higher than average,

Lifting parameters

Best holding force of the magnet in ideal parameters – what contributes to it?

Holding force of 29.00 kg is a result of laboratory testing executed under the following configuration:
  • with the application of a yoke made of special test steel, guaranteeing full magnetic saturation
  • possessing a thickness of min. 10 mm to ensure full flux closure
  • characterized by lack of roughness
  • with zero gap (without impurities)
  • under axial application of breakaway force (90-degree angle)
  • at temperature approx. 20 degrees Celsius

Practical aspects of lifting capacity – factors

Effective lifting capacity is affected by working environment parameters, such as (from most important):
  • Distance (between the magnet and the metal), because even a very small distance (e.g. 0.5 mm) results in a drastic drop in force by up to 50% (this also applies to varnish, corrosion or debris).
  • Angle of force application – highest force is available only during perpendicular pulling. The shear force of the magnet along the plate is usually many times smaller (approx. 1/5 of the lifting capacity).
  • Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of generating force.
  • Material type – the best choice is high-permeability steel. Stainless steels may have worse magnetic properties.
  • Surface finish – ideal contact is possible only on polished steel. Rough texture reduce the real contact area, weakening the magnet.
  • Temperature influence – hot environment weakens pulling force. Exceeding the limit temperature can permanently damage the magnet.

Lifting capacity testing was conducted on a smooth plate of suitable thickness, under perpendicular forces, in contrast under attempts to slide the magnet the lifting capacity is smaller. In addition, even a minimal clearance between the magnet and the plate decreases the holding force.

H&S for magnets
Conscious usage

Use magnets with awareness. Their immense force can surprise even experienced users. Plan your moves and do not underestimate their force.

Magnetic interference

GPS units and mobile phones are highly sensitive to magnetism. Direct contact with a powerful NdFeB magnet can ruin the sensors in your phone.

Hand protection

Risk of injury: The attraction force is so great that it can cause hematomas, crushing, and broken bones. Use thick gloves.

Skin irritation risks

Certain individuals experience a hypersensitivity to Ni, which is the common plating for NdFeB magnets. Prolonged contact may cause an allergic reaction. We recommend use safety gloves.

Swallowing risk

NdFeB magnets are not toys. Eating several magnets may result in them attracting across intestines, which constitutes a direct threat to life and necessitates immediate surgery.

Do not overheat magnets

Standard neodymium magnets (grade N) lose power when the temperature goes above 80°C. The loss of strength is permanent.

Implant safety

Medical warning: Strong magnets can turn off pacemakers and defibrillators. Do not approach if you have electronic implants.

Fire warning

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

Threat to electronics

Avoid bringing magnets near a purse, laptop, or TV. The magnetic field can destroy these devices and wipe information from cards.

Beware of splinters

Despite metallic appearance, the material is brittle and not impact-resistant. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.

Attention! Need more info? Read our article: Why are neodymium magnets dangerous?