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UMC 36x6/4X8 / N38 - cylindrical magnetic holder

cylindrical magnetic holder

Catalog no 320410

GTIN/EAN: 5906301814665

5.00

Diameter

36 mm [±1 mm]

internal diameter Ø

6/4 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

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21.49 ZŁ with VAT / pcs + price for transport

17.47 ZŁ net + 23% VAT / pcs

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Physical properties - UMC 36x6/4X8 / N38 - cylindrical magnetic holder

Specification / characteristics - UMC 36x6/4X8 / N38 - cylindrical magnetic holder

properties
properties values
Cat. no. 320410
GTIN/EAN 5906301814665
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 36 mm [±1 mm]
internal diameter Ø 6/4 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 UMC 36x6/4X8 / N38 - cylindrical 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
Engineering data and GPSR
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%
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: 320410-2026
Measurement Calculator
Magnet pull force
Magnetic Field
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They are characterized by point action of the magnetic field exclusively on the front surface. Used where the magnet must be hidden deep in the material or precisely positioned.
It can also be glued or pressed (maintaining tolerance) into a prepared hole. Thanks to the long body, the magnet is stable in the hole and does not tilt.
The thick, steel or brass housing (sleeve) effectively screens the magnetic field on the sides of the holder. This is a key feature when mounting in steel sockets so the magnet doesn't "stick" to the hole walls during insertion.
It is one of the most durable types of holders, resistant to crushing. The risk of magnet cracking with normal use is minimal as it is shielded.
These holders are produced with standard tolerance for industrial magnets (usually ±0.1 mm or h6). If high precision is required, measure the specific batch with a caliper before machining sockets.

Advantages as well as disadvantages of rare earth magnets.

Pros

Besides their remarkable pulling force, neodymium magnets offer the following advantages:
  • They do not lose strength, even over around ten years – the reduction in strength is only ~1% (based on measurements),
  • Neodymium magnets are distinguished by exceptionally resistant to demagnetization caused by external interference,
  • A magnet with a metallic gold surface looks better,
  • Neodymium magnets generate maximum magnetic induction on a small surface, which allows for strong attraction,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can function (depending on the shape) even at a temperature of 230°C or more...
  • Thanks to versatility in constructing and the ability to customize to complex applications,
  • Huge importance in future technologies – they are used in mass storage devices, electric drive systems, advanced medical instruments, also industrial machines.
  • Thanks to efficiency per cm³, small magnets offer high operating force, occupying minimum space,

Cons

Disadvantages of neodymium magnets:
  • At strong impacts they can break, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage and increases the magnet's 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 stability even at temperatures up to 230°C
  • They oxidize in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
  • We suggest cover - magnetic mount, due to difficulties in creating nuts inside the magnet and complicated shapes.
  • Possible danger related to microscopic parts of magnets pose a threat, in case of ingestion, which gains importance in the aspect of protecting the youngest. It is also worth noting that small components of these devices can be problematic in diagnostics medical after entering the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Lifting parameters

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

Information about lifting capacity is the result of a measurement for ideal contact conditions, including:
  • using a sheet made of mild steel, serving as a magnetic yoke
  • possessing a thickness of at least 10 mm to avoid saturation
  • characterized by even structure
  • with direct contact (without coatings)
  • for force acting at a right angle (in the magnet axis)
  • at ambient temperature approx. 20 degrees Celsius

Key elements affecting lifting force

Effective lifting capacity is affected by working environment parameters, mainly (from most important):
  • Distance – the presence of any layer (paint, tape, gap) acts as an insulator, which lowers capacity steeply (even by 50% at 0.5 mm).
  • Pull-off angle – remember that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the nominal value.
  • Substrate thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
  • Steel grade – the best choice is high-permeability steel. Hardened steels may generate lower lifting capacity.
  • Surface condition – ground elements ensure maximum contact, which improves force. Rough surfaces weaken the grip.
  • Thermal conditions – NdFeB sinters have a sensitivity to temperature. When it is hot they lose power, and in frost they can be stronger (up to a certain limit).

Holding force was measured on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, whereas under shearing force the load capacity is reduced by as much as 5 times. Moreover, even a slight gap between the magnet and the plate reduces the load capacity.

Safe handling of NdFeB magnets
Keep away from children

Adult use only. Tiny parts can be swallowed, leading to intestinal necrosis. Keep away from kids and pets.

Crushing risk

Large magnets can break fingers in a fraction of a second. Never place your hand between two attracting surfaces.

Powerful field

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

Metal Allergy

A percentage of the population experience a contact allergy to Ni, which is the standard coating for NdFeB magnets. Prolonged contact can result in a rash. It is best to use safety gloves.

Machining danger

Dust produced during machining of magnets is flammable. Do not drill into magnets without proper cooling and knowledge.

Demagnetization risk

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

Medical implants

People with a ICD must maintain an absolute distance from magnets. The magnetic field can interfere with the functioning of the implant.

Magnetic media

Device Safety: Strong magnets can damage data carriers and delicate electronics (pacemakers, hearing aids, timepieces).

Threat to navigation

Navigation devices and smartphones are highly susceptible to magnetism. Close proximity with a powerful NdFeB magnet can decalibrate the internal compass in your phone.

Magnet fragility

NdFeB magnets are sintered ceramics, which means they are very brittle. Collision of two magnets will cause them cracking into shards.

Warning! Need more info? Check our post: Are neodymium magnets dangerous?