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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

Load capacity

29.00 kg / 284.39 N

Coating

[NiCuNi] Nickel

technical parameters »

21.49 ZŁ with VAT / pcs + price for transport

17.47 ZŁ net + 23% VAT / pcs

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Detailed specification - 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
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
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%
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
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They are characterized by point action of the magnetic field exclusively on the front surface. They are used in positioning elements, injection molds, dies, and automation.
These holders usually have an internal thread (blind or through) on the back wall. It is a precise, durable solution enabling depth adjustment.
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.
The neodymium magnet is deeply embedded (glued) in a solid block of steel or brass, making it very resistant. Thanks to the solid build, the holder withstands repeated impacts and shocks during work cycles.
We recommend making the mounting hole with slight clearance and using glue for certainty. If high precision is required, measure the specific batch with a caliper before machining sockets.

Pros as well as cons of neodymium magnets.

Pros

In addition to their magnetic capacity, neodymium magnets provide the following advantages:
  • Their strength is maintained, and after around ten years it decreases only by ~1% (according to research),
  • They are extremely resistant to demagnetization induced by external magnetic fields,
  • A magnet with a smooth gold surface has an effective appearance,
  • Neodymium magnets achieve maximum magnetic induction on a small area, which increases force concentration,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can function (depending on the form) even at a temperature of 230°C or more...
  • Possibility of accurate forming and modifying to precise requirements,
  • Significant place in future technologies – they are used in computer drives, brushless drives, medical equipment, and multitasking production systems.
  • Thanks to their power density, small magnets offer high operating force, with minimal size,

Weaknesses

Cons of neodymium magnets: weaknesses and usage proposals
  • To avoid cracks under impact, we recommend using special steel holders. Such a solution protects the magnet and simultaneously increases its durability.
  • NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of strength (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 extremely resistant to heat
  • Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material stable to moisture, in case of application outdoors
  • Limited ability of making nuts in the magnet and complex forms - preferred is casing - mounting mechanism.
  • Potential hazard to health – tiny shards of magnets are risky, when accidentally swallowed, which gains importance in the context of child health protection. Additionally, tiny parts of these magnets are able to disrupt the diagnostic process medical when they are in the body.
  • With budget limitations the cost of neodymium magnets is economically unviable,

Lifting parameters

Maximum lifting force for a neodymium magnet – what affects it?

The load parameter shown refers to the maximum value, measured under laboratory conditions, specifically:
  • with the contact of a yoke made of low-carbon steel, ensuring maximum field concentration
  • whose transverse dimension is min. 10 mm
  • with a plane perfectly flat
  • under conditions of gap-free contact (surface-to-surface)
  • for force acting at a right angle (in the magnet axis)
  • in temp. approx. 20°C

Magnet lifting force in use – key factors

Real force is influenced by specific conditions, including (from most important):
  • Space between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by veneer or dirt) significantly weakens the pulling force, often by half at just 0.5 mm.
  • Direction of force – highest force is reached only during pulling at a 90° angle. The force required to slide of the magnet along the plate is usually many times smaller (approx. 1/5 of the lifting capacity).
  • Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of converting into lifting capacity.
  • Chemical composition of the base – low-carbon steel attracts best. Alloy steels decrease magnetic permeability and lifting capacity.
  • Surface finish – ideal contact is possible only on smooth steel. Rough texture reduce the real contact area, weakening the magnet.
  • Operating temperature – NdFeB sinters have a sensitivity to temperature. When it is hot they lose power, and at low temperatures they can be stronger (up to a certain limit).

Holding force was tested on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, whereas under parallel forces the holding force is lower. Moreover, even a small distance between the magnet and the plate lowers the lifting capacity.

Safety rules for work with NdFeB magnets
Power loss in heat

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

Handling guide

Before starting, check safety instructions. Sudden snapping can destroy the magnet or hurt your hand. Be predictive.

Machining danger

Fire warning: Neodymium dust is explosive. Avoid machining magnets without safety gear as this may cause fire.

Crushing risk

Pinching hazard: The attraction force is so immense that it can result in blood blisters, pinching, and broken bones. Protective gloves are recommended.

Danger to the youngest

Adult use only. Small elements can be swallowed, leading to serious injuries. Store away from children and animals.

Protective goggles

Despite metallic appearance, the material is brittle and cannot withstand shocks. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.

Skin irritation risks

Medical facts indicate that nickel (the usual finish) is a common allergen. If your skin reacts to metals, avoid touching magnets with bare hands and select coated magnets.

Electronic hazard

Do not bring magnets close to a wallet, computer, or TV. The magnetism can irreversibly ruin these devices and erase data from cards.

Implant safety

Warning for patients: Powerful magnets affect electronics. Maintain minimum 30 cm distance or request help to work with the magnets.

Keep away from electronics

Be aware: neodymium magnets generate a field that confuses precision electronics. Keep a safe distance from your phone, tablet, and navigation systems.

Attention! Looking for details? Read our article: Why are neodymium magnets dangerous?