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UI 17.5x5 [C310] / N38 - badge holder

badge holder

Catalog no 150261

GTIN/EAN: 5906301813583

5.00
Load capacity 0.75 kg / 7.35 N
Diameter Ø
17.5 mm [±1 mm]
Height
5 mm [±1 mm]
Weight
0.11 g
see technical specifications »

1.070 zł net / pcs

1.316 zł with VAT (23% VAT) / pcs

price for transport

bulk discounts:

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Frequently asked questions

How much will a magnetic holder hold in practice?
The catalogue value assumes full contact with smooth steel at least 10 mm thick and a perpendicular pull. Thinner sheet, paint, rust and surface irregularities reduce it considerably: on 1 mm sheet about half remains. Lifting and vertical mounting call for an additional safety margin.
Will a holder work on stainless steel?
Not on austenitic grades 304 and 316 — they are effectively non-magnetic. It will not work on aluminium, copper or brass either. Those materials need a mechanical gripper.
Which coating for which conditions?
Nickel-copper-nickel (NiCuNi) is the standard and covers most applications. Epoxy is used for damp environments and outdoor work, zinc is sufficient for dry interiors. Holders in a steel housing or in rubber also protect the magnet against impact.

Guides from the knowledge base

Want to talk magnets?

Call us now +48 888 99 98 98 alternatively let us know using contact form the contact section.
Specifications and structure of a neodymium magnet can be estimated using our power calculator.

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Product card - UI 17.5x5 [C310] / N38 - badge holder

Specification / characteristics - UI 17.5x5 [C310] / N38 - badge holder

properties
properties values
Cat. no. 150261
GTIN/EAN 5906301813583
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 17.5 mm [±1 mm]
Height 5 mm [±1 mm]
Weight 0.11 g
Load capacity ~ ? 0.75 kg / 7.35 N
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UI 17.5x5 [C310] / N38 - badge 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 310 °C
Curie Temperature TF 590 °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: 150261-2026
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The magnetic holder is safe for delicate fabrics, expensive suits, silk, and shirts. This ensures elegance and wearing comfort, without the risk of pricking yourself or ruining clothes. It's a standard solution at conferences, trade fairs, and in companies caring about image.
Construction includes a module with strong neodymium magnets in plastic and a plate with self-adhesive tape. The outer part has strong 3M foam tape, to which a business card or plastic case is stuck. Magnets are hidden in an aesthetic plastic housing that does not irritate the skin.
Thanks to the use of neodymium, the holder securely grips through a jacket, thick sweater, fleece, or coat. Model UI 17.5x5 [C310] / N38 ensures optimal grip without the risk of losing the badge in motion.
People with a pacemaker or other implanted medical devices should not wear magnets near the chest area. Healthy users can use badges without worrying about their well-being.
We have large warehouse stocks in Poland, allowing for fast fulfillment of orders for companies (even thousands of pieces). Contact us to receive an individual B2B offer tailored to your company's needs.

Strengths and weaknesses of rare earth magnets.

Strengths

Apart from their strong magnetic energy, neodymium magnets have these key benefits:
  • They retain full power for around ten years – the drop is just ~1% (according to analyses),
  • They feature excellent resistance to magnetic field loss when exposed to external magnetic sources,
  • In other words, due to the aesthetic finish of gold, the element becomes visually attractive,
  • Neodymium magnets ensure maximum magnetic induction on a small area, which ensures high operational effectiveness,
  • Thanks to resistance to high temperature, they are capable of working (depending on the shape) even at temperatures up to 230°C and higher...
  • Possibility of detailed creating as well as adjusting to atypical conditions,
  • Fundamental importance in modern technologies – they are utilized in magnetic memories, drive modules, medical devices, also complex engineering applications.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Limitations

Drawbacks and weaknesses of neodymium magnets: tips and applications.
  • To avoid cracks under impact, we suggest using special steel housings. Such a solution secures the magnet and simultaneously improves its durability.
  • Neodymium magnets lose force when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape and 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
  • When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
  • We recommend casing - magnetic mechanism, due to difficulties in realizing nuts inside the magnet and complicated forms.
  • Health risk related to microscopic parts of magnets are risky, if swallowed, which gains importance in the context of child safety. Additionally, tiny parts of these magnets can disrupt the diagnostic process medical after entering the body.
  • High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which hinders application in large quantities

Lifting parameters

Maximum lifting capacity of the magnet – what contributes to it?

Holding force of 0.75 kg is a result of laboratory testing conducted under specific, ideal conditions:
  • using a sheet made of low-carbon steel, functioning as a circuit closing element
  • with a cross-section no less than 10 mm
  • with an polished touching surface
  • with total lack of distance (no coatings)
  • during detachment in a direction perpendicular to the mounting surface
  • at ambient temperature approx. 20 degrees Celsius

Lifting capacity in practice – influencing factors

In real-world applications, the actual holding force is determined by several key aspects, listed from crucial:
  • Clearance – existence of any layer (rust, tape, air) acts as an insulator, which lowers power rapidly (even by 50% at 0.5 mm).
  • Force direction – note that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the maximum value.
  • Plate thickness – too thin plate does not close the flux, causing part of the flux to be wasted into the air.
  • Material type – ideal substrate is pure iron steel. Hardened steels may have worse magnetic properties.
  • Plate texture – smooth surfaces ensure maximum contact, which improves force. Uneven metal reduce efficiency.
  • Operating temperature – NdFeB sinters have a negative temperature coefficient. At higher temperatures they are weaker, and at low temperatures they can be stronger (up to a certain limit).

Lifting capacity was measured using a steel plate with a smooth surface of optimal thickness (min. 20 mm), under vertically applied force, whereas under shearing force the holding force is lower. In addition, even a small distance between the magnet’s surface and the plate lowers the holding force.

Warnings
Electronic devices

Data protection: Neodymium magnets can ruin payment cards and sensitive devices (pacemakers, medical aids, mechanical watches).

Phone sensors

GPS units and mobile phones are highly sensitive to magnetic fields. Direct contact with a powerful NdFeB magnet can ruin the internal compass in your phone.

Do not underestimate power

Before use, check safety instructions. Uncontrolled attraction can break the magnet or injure your hand. Be predictive.

Sensitization to coating

Nickel alert: The nickel-copper-nickel coating consists of nickel. If an allergic reaction occurs, cease working with magnets and wear gloves.

Shattering risk

Beware of splinters. Magnets can fracture upon violent connection, ejecting shards into the air. Eye protection is mandatory.

Flammability

Dust generated during grinding of magnets is flammable. Avoid drilling into magnets unless you are an expert.

Heat warning

Keep cool. NdFeB magnets are susceptible to temperature. If you need operation above 80°C, inquire about HT versions (H, SH, UH).

Finger safety

Pinching hazard: The pulling power is so great that it can cause blood blisters, pinching, and broken bones. Use thick gloves.

Choking Hazard

Absolutely store magnets out of reach of children. Choking hazard is significant, and the consequences of magnets connecting inside the body are fatal.

ICD Warning

Medical warning: Strong magnets can deactivate heart devices and defibrillators. Do not approach if you have medical devices.

Attention! Learn more about hazards in the article: Safety of working with magnets.