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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

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3.33 ZŁ with VAT / pcs + price for transport

2.71 ZŁ net + 23% VAT / pcs

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Technical data 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
Technical and environmental data
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%
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: 320406-2026
Quick Unit Converter
Pulling force
Magnetic Induction
Insert your figure into any field, to see the rest change on the fly.

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These are magnets in the shape of a rod in a brass or steel sleeve, ideal for embedding in deep sockets. Thanks to side shielding, they do not "catch" the walls of the mounting hole, which facilitates installation.
Mounting is done by screwing with a bolt from the back of the device or machine. Thanks to the long body, the magnet is stable in the hole and does not tilt.
The construction causes the magnetic flux to short-circuit inside, making the sides practically non-magnetic. It enables precise point action without side interference.
The steel housing provides excellent mechanical protection for the brittle magnet against impacts. Suitable for working in difficult workshop and industrial conditions.
These holders are produced with standard tolerance for industrial magnets (usually ±0.1 mm or h6). It is an industrial product, not a precise machine element, although the execution is careful.

Strengths and weaknesses of Nd2Fe14B magnets.

Pros

Besides their tremendous pulling force, neodymium magnets offer the following advantages:
  • They retain full power for almost 10 years – the drop is just ~1% (based on simulations),
  • They do not lose their magnetic properties even under close interference source,
  • The use of an elegant coating of noble metals (nickel, gold, silver) causes the element to have aesthetics,
  • Magnets exhibit impressive magnetic induction on the active area,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
  • Thanks to flexibility in shaping and the ability to modify to individual projects,
  • Versatile presence in future technologies – they serve a role in HDD drives, motor assemblies, advanced medical instruments, and multitasking production systems.
  • Relatively small size with high pulling force – neodymium magnets offer high power in tiny dimensions, which makes them useful in compact constructions

Limitations

Drawbacks and weaknesses of neodymium magnets: weaknesses and usage proposals
  • They are prone to damage upon heavy impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only protects the magnet but also improves its resistance to damage
  • Neodymium magnets lose 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 advise using waterproof magnets made of rubber, plastic or other material stable to moisture, when using outdoors
  • We suggest a housing - magnetic mechanism, due to difficulties in realizing threads inside the magnet and complex forms.
  • Possible danger related to microscopic parts of magnets are risky, when accidentally swallowed, which is particularly important in the aspect of protecting the youngest. Furthermore, small components of these magnets can be problematic in diagnostics medical in case of swallowing.
  • With budget limitations the cost of neodymium magnets can be a barrier,

Pull force analysis

Optimal lifting capacity of a neodymium magnet – what it depends on?

Holding force of 4.00 kg is a theoretical maximum value performed under the following configuration:
  • on a base made of structural steel, perfectly concentrating the magnetic flux
  • whose transverse dimension reaches at least 10 mm
  • characterized by even structure
  • with zero gap (no coatings)
  • under axial force vector (90-degree angle)
  • at temperature approx. 20 degrees Celsius

Lifting capacity in real conditions – factors

In real-world applications, the actual lifting capacity results from a number of factors, listed from crucial:
  • Distance – the presence of any layer (paint, tape, gap) interrupts the magnetic circuit, which reduces capacity steeply (even by 50% at 0.5 mm).
  • Pull-off angle – remember that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the maximum value.
  • Substrate thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
  • Chemical composition of the base – mild steel gives the best results. Higher carbon content decrease magnetic properties and lifting capacity.
  • Smoothness – ideal contact is possible only on smooth steel. Any scratches and bumps reduce the real contact area, weakening the magnet.
  • Operating temperature – neodymium magnets have a negative temperature coefficient. At higher temperatures they are weaker, and in frost gain strength (up to a certain limit).

Holding force was checked on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, however under parallel forces the lifting capacity is smaller. Additionally, even a slight gap between the magnet and the plate decreases the lifting capacity.

Safe handling of neodymium magnets
Allergy Warning

Certain individuals experience a contact allergy to Ni, which is the common plating for NdFeB magnets. Prolonged contact may cause dermatitis. We suggest wear protective gloves.

Risk of cracking

Neodymium magnets are sintered ceramics, which means they are very brittle. Clashing of two magnets will cause them shattering into small pieces.

Swallowing risk

Absolutely store magnets away from children. Choking hazard is high, and the consequences of magnets connecting inside the body are very dangerous.

Compass and GPS

Note: rare earth magnets generate a field that disrupts sensitive sensors. Maintain a safe distance from your phone, tablet, and GPS.

Power loss in heat

Control the heat. Exposing the magnet to high heat will destroy its magnetic structure and pulling force.

Powerful field

Handle magnets consciously. Their powerful strength can shock even professionals. Plan your moves and do not underestimate their power.

Medical implants

People with a heart stimulator must maintain an safe separation from magnets. The magnetic field can disrupt the functioning of the implant.

Magnetic media

Equipment safety: Strong magnets can ruin data carriers and delicate electronics (pacemakers, hearing aids, mechanical watches).

Fire risk

Mechanical processing of neodymium magnets carries a risk of fire risk. Neodymium dust oxidizes rapidly with oxygen and is difficult to extinguish.

Bone fractures

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

Caution! Learn more about risks in the article: Magnet Safety Guide.