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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 parameters »

22.94 ZŁ with VAT / pcs + price for transport

18.65 ZŁ net + 23% VAT / pcs

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Detailed specification - 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
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: 220330-2026
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This type of holder is perfect for mounting magnetic latches in cabinets, doors, and flaps. The ability to flush the screw with the magnet surface allows for perfect closing without gaps. Model UMS 36x10.5x6.5x8 / 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. 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. Often a more convenient and cheaper solution is using one magnet and a steel washer (plate) as an armature. Mounting a magnet to a plate eliminates the problem of matching poles and is easier.
The declared capacity (e.g., 29.00 kg) refers to the perpendicular force needed to detach the magnet from thick steel. If the magnet hangs vertically, gravity causes it to slide with much less load. 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). A bare ring has a dispersed field on both sides but is weaker in point holding.

Strengths as well as weaknesses of neodymium magnets.

Pros

Apart from their consistent power, neodymium magnets have these key benefits:
  • They do not lose magnetism, even during approximately ten years – the drop in strength is only ~1% (based on measurements),
  • They have excellent resistance to magnetism drop due to external magnetic sources,
  • In other words, due to the glossy finish of nickel, the element is aesthetically pleasing,
  • The surface of neodymium magnets generates a maximum magnetic field – this is a key feature,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Possibility of exact forming and modifying to defined requirements,
  • Fundamental importance in modern industrial fields – they find application in magnetic memories, electromotive mechanisms, advanced medical instruments, also complex engineering applications.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which allows their use in small systems

Cons

What to avoid - cons of neodymium magnets: weaknesses and usage proposals
  • To avoid cracks under impact, we recommend using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
  • Neodymium magnets decrease their strength 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 durability even at temperatures up to 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 resistant to moisture, in case of application outdoors
  • Limited possibility of making nuts in the magnet and complex shapes - recommended is casing - mounting mechanism.
  • Possible danger related to microscopic parts of magnets pose a threat, when accidentally swallowed, which gains importance in the context of child safety. Additionally, small components of these devices can disrupt the diagnostic process medical after entering the body.
  • Due to expensive raw materials, their price exceeds standard values,

Pull force analysis

Maximum lifting capacity of the magnet – what it depends on?

Information about lifting capacity was determined for optimal configuration, assuming:
  • with the application of a yoke made of low-carbon steel, guaranteeing full magnetic saturation
  • possessing a massiveness of min. 10 mm to ensure full flux closure
  • characterized by smoothness
  • with total lack of distance (no coatings)
  • under vertical force vector (90-degree angle)
  • at temperature approx. 20 degrees Celsius

Lifting capacity in real conditions – factors

In practice, the real power depends on many variables, listed from crucial:
  • Air gap (betwixt the magnet and the plate), since even a tiny distance (e.g. 0.5 mm) leads to a reduction in force by up to 50% (this also applies to varnish, corrosion or dirt).
  • Load vector – highest force is reached only during pulling at a 90° angle. The force required to slide of the magnet along the surface is typically several times lower (approx. 1/5 of the lifting capacity).
  • Plate thickness – insufficiently thick sheet does not accept the full field, causing part of the flux to be lost to the other side.
  • Metal type – different alloys attracts identically. High carbon content weaken the interaction with the magnet.
  • Surface structure – the more even the plate, the better the adhesion and higher the lifting capacity. Roughness acts like micro-gaps.
  • Thermal environment – temperature increase results in weakening of force. Check the thermal limit for a given model.

Lifting capacity testing was performed on a smooth plate of optimal thickness, under a perpendicular pulling force, in contrast under shearing force the lifting capacity is smaller. Moreover, even a slight gap between the magnet and the plate reduces the holding force.

Safe handling of neodymium magnets
Bone fractures

Danger of trauma: The attraction force is so great that it can cause hematomas, crushing, and broken bones. Protective gloves are recommended.

Fragile material

NdFeB magnets are sintered ceramics, which means they are fragile like glass. Impact of two magnets leads to them shattering into shards.

Nickel allergy

Certain individuals experience a hypersensitivity to Ni, which is the standard coating for neodymium magnets. Prolonged contact may cause skin redness. We recommend use safety gloves.

Pacemakers

Patients with a heart stimulator should keep an absolute distance from magnets. The magnetic field can disrupt the operation of the implant.

Do not give to children

Adult use only. Small elements pose a choking risk, causing serious injuries. Store out of reach of children and animals.

Protect data

Data protection: Strong magnets can damage data carriers and sensitive devices (heart implants, medical aids, mechanical watches).

Fire warning

Fire hazard: Rare earth powder is explosive. Avoid machining magnets in home conditions as this risks ignition.

Permanent damage

Regular neodymium magnets (grade N) lose power when the temperature goes above 80°C. This process is irreversible.

Phone sensors

An intense magnetic field negatively affects the operation of compasses in smartphones and GPS navigation. Do not bring magnets near a smartphone to prevent breaking the sensors.

Caution required

Be careful. Rare earth magnets attract from a distance and connect with massive power, often quicker than you can move away.

Safety First! Details about risks in the article: Safety of working with magnets.