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UMC 16x5/2x5 / N38 - cylindrical magnetic holder

cylindrical magnetic holder

Catalog no 320406

GTIN/EAN: 5906301814627

5.00

Diameter

16 mm [±1 mm]

internal diameter Ø

5/2 mm [±1 mm]

Height

5 mm [±1 mm]

Weight

5.5 g

Magnetization Direction

↑ axial

Load capacity

4.00 kg / 39.23 N

Coating

[NiCuNi] Nickel

see technical data »

3.33 ZŁ with VAT / pcs + price for transport

2.71 ZŁ net + 23% VAT / pcs

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Technical specification of the product - UMC 16x5/2x5 / N38 - cylindrical magnetic holder

Specification / characteristics - UMC 16x5/2x5 / N38 - cylindrical magnetic holder

properties
properties values
Cat. no. 320406
GTIN/EAN 5906301814627
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 16 mm [±1 mm]
internal diameter Ø 5/2 mm [±1 mm]
Height 5 mm [±1 mm]
Weight 5.5 g
Magnetization Direction ↑ axial
Load capacity ~ ? 4.00 kg / 39.23 N
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMC 16x5/2x5 / 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
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%
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: 320406-2026
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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.
Mounting is done by screwing with a bolt from the back of the device or machine. 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.
Dimensions may vary slightly, so they are not always H7 fitted elements without machining. For mounting certainty and centering, gluing or screw fastening from the back is used.

Pros as well as cons of rare earth magnets.

Advantages

Besides their tremendous pulling force, neodymium magnets offer the following advantages:
  • Their strength is maintained, and after approximately ten years it decreases only by ~1% (according to research),
  • They are extremely resistant to demagnetization induced by external field influence,
  • In other words, due to the smooth finish of silver, the element looks attractive,
  • The surface of neodymium magnets generates a unique magnetic field – this is a distinguishing feature,
  • Thanks to resistance to high temperature, they are capable of working (depending on the shape) even at temperatures up to 230°C and higher...
  • Thanks to modularity in forming and the ability to customize to specific needs,
  • Significant place in modern technologies – they serve a role in data components, electric drive systems, medical equipment, and complex engineering applications.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Weaknesses

Disadvantages of NdFeB magnets:
  • To avoid cracks under impact, we recommend using special steel holders. Such a solution secures the magnet and simultaneously improves its durability.
  • When exposed to high temperature, neodymium magnets experience a drop in force. Often, when the temperature exceeds 80°C, their power decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • Due to limitations in realizing nuts and complex shapes in magnets, we propose using a housing - magnetic mechanism.
  • Possible danger related to microscopic parts of magnets pose a threat, in case of ingestion, which is particularly important in the context of child health protection. Furthermore, small components of these products can complicate diagnosis medical when they are in the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Holding force characteristics

Highest magnetic holding force – what it depends on?

The specified lifting capacity refers to the peak performance, recorded under laboratory conditions, namely:
  • using a sheet made of low-carbon steel, functioning as a magnetic yoke
  • possessing a thickness of at least 10 mm to ensure full flux closure
  • with an ground contact surface
  • without any insulating layer between the magnet and steel
  • under axial force direction (90-degree angle)
  • in temp. approx. 20°C

Key elements affecting lifting force

Effective lifting capacity impacted by working environment parameters, mainly (from most important):
  • Distance (betwixt the magnet and the metal), since even a microscopic clearance (e.g. 0.5 mm) results in a reduction in force by up to 50% (this also applies to paint, rust or debris).
  • Force direction – catalog parameter refers to pulling vertically. When slipping, the magnet holds significantly lower power (often approx. 20-30% of maximum force).
  • Substrate thickness – for full efficiency, the steel must be adequately massive. Thin sheet limits the attraction force (the magnet "punches through" it).
  • Steel grade – the best choice is high-permeability steel. Stainless steels may attract less.
  • Smoothness – ideal contact is possible only on polished steel. Rough texture create air cushions, reducing force.
  • Thermal environment – heating the magnet causes a temporary drop of force. It is worth remembering the thermal limit for a given model.

Lifting capacity was measured using a steel plate with a smooth surface of optimal thickness (min. 20 mm), under perpendicular pulling force, however under shearing force the lifting capacity is smaller. Moreover, even a slight gap between the magnet and the plate reduces the lifting capacity.

Safe handling of neodymium magnets
Operating temperature

Control the heat. Heating the magnet to high heat will destroy its magnetic structure and strength.

Keep away from children

These products are not suitable for play. Eating a few magnets may result in them connecting inside the digestive tract, which constitutes a direct threat to life and necessitates immediate surgery.

Magnetic interference

Remember: neodymium magnets produce a field that interferes with precision electronics. Maintain a safe distance from your mobile, device, and GPS.

Protective goggles

Beware of splinters. Magnets can fracture upon uncontrolled impact, launching sharp fragments into the air. Eye protection is mandatory.

Electronic devices

Device Safety: Neodymium magnets can damage payment cards and sensitive devices (pacemakers, medical aids, mechanical watches).

Fire risk

Dust produced during cutting of magnets is combustible. Avoid drilling into magnets unless you are an expert.

Danger to pacemakers

Warning for patients: Strong magnetic fields disrupt medical devices. Keep minimum 30 cm distance or ask another person to handle the magnets.

Safe operation

Handle magnets consciously. Their immense force can shock even professionals. Stay alert and do not underestimate their power.

Skin irritation risks

Certain individuals have a contact allergy to Ni, which is the standard coating for NdFeB magnets. Prolonged contact might lead to dermatitis. We recommend use protective gloves.

Serious injuries

Watch your fingers. Two large magnets will snap together immediately with a force of several hundred kilograms, destroying everything in their path. Exercise extreme caution!

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