Neodymium magnets – most powerful on the market

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UI 40x12x7 [CA] - badge holder

badge holder

Catalog no 150341

GTIN/EAN: 5906301813613

5.00

length

40 mm [±1 mm]

Width

12 mm [±1 mm]

Height

7 mm [±1 mm]

Weight

1.5 g

0.984 with VAT / pcs + price for transport

0.800 ZŁ net + 23% VAT / pcs

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Technical - UI 40x12x7 [CA] - badge holder

Specification / characteristics - UI 40x12x7 [CA] - badge holder

properties
properties values
Cat. no. 150341
GTIN/EAN 5906301813613
Production/Distribution Dhit sp. z o.o.
ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin Poland / China / Germany
Customs code 85059029
length 40 mm [±1 mm]
Width 12 mm [±1 mm]
Height 7 mm [±1 mm]
Weight 1.5 g
Manufacturing Tolerance ±1 mm

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
Chemical composition
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%
Environmental data
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: 150341-2026
Measurement Calculator
Pulling force

Magnetic Induction

Other proposals

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 is the most frequently chosen type of fastening in corporations, hotels, and banks.
Construction includes a module with strong neodymium magnets in plastic and a plate with self-adhesive tape. You stick your badge on the plate, and the magnet holds it through the clothing material. Magnets are hidden in an aesthetic plastic housing that does not irritate the skin.
Attraction force is sufficient to hold the badge even on winter clothing. Model UI 40x12x7 [CA] 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. The magnetic field is point-based, short-range, and does not negatively affect a healthy person's body.
We serve advertising agencies, printing houses, hotels, and corporations, offering attractive prices for bulk purchases. You can order samples to check the quality before a larger purchase.

Pros and cons of rare earth magnets.

Advantages

Besides their remarkable pulling force, neodymium magnets offer the following advantages:
  • Their magnetic field remains stable, and after approximately ten years it drops only by ~1% (theoretically),
  • Neodymium magnets are characterized by remarkably resistant to demagnetization caused by external magnetic fields,
  • In other words, due to the reflective surface of nickel, the element gains visual value,
  • They feature high magnetic induction at the operating surface, making them more effective,
  • Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
  • Possibility of accurate shaping and optimizing to concrete needs,
  • Significant place in modern industrial fields – they find application in hard drives, drive modules, diagnostic systems, also technologically advanced constructions.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which makes them useful in miniature devices

Disadvantages

Disadvantages of NdFeB magnets:
  • To avoid cracks upon strong impacts, we recommend using special steel holders. Such a solution protects the magnet and simultaneously increases its durability.
  • NdFeB magnets lose strength when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (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
  • Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material immune to moisture, in case of application outdoors
  • Due to limitations in producing nuts and complex shapes in magnets, we recommend using a housing - magnetic mechanism.
  • Possible danger to health – tiny shards of magnets are risky, if swallowed, which becomes key in the context of child safety. Additionally, tiny parts of these products can complicate diagnosis medical in case of swallowing.
  • Due to complex production process, their price exceeds standard values,

Lifting parameters

Maximum lifting capacity of the magnetwhat contributes to it?

Breakaway force is the result of a measurement for optimal configuration, assuming:
  • using a base made of low-carbon steel, serving as a circuit closing element
  • with a cross-section no less than 10 mm
  • with a surface perfectly flat
  • without the slightest air gap between the magnet and steel
  • during detachment in a direction perpendicular to the plane
  • in neutral thermal conditions

Magnet lifting force in use – key factors

Effective lifting capacity is affected by specific conditions, including (from priority):
  • Space between surfaces – every millimeter of separation (caused e.g. by veneer or dirt) diminishes the pulling force, often by half at just 0.5 mm.
  • Force direction – declared lifting capacity refers to detachment vertically. When slipping, the magnet exhibits much less (often approx. 20-30% of maximum force).
  • Element thickness – to utilize 100% power, the steel must be adequately massive. Thin sheet limits the attraction force (the magnet "punches through" it).
  • Material type – the best choice is pure iron steel. Cast iron may attract less.
  • Surface structure – the more even the surface, the larger the contact zone and higher the lifting capacity. Roughness acts like micro-gaps.
  • Thermal factor – high temperature weakens pulling force. Too high temperature can permanently damage the magnet.

Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under perpendicular forces, however under parallel forces the lifting capacity is smaller. Moreover, even a small distance between the magnet’s surface and the plate lowers the lifting capacity.

Warnings
Conscious usage

Before starting, read the rules. Uncontrolled attraction can destroy the magnet or hurt your hand. Think ahead.

Mechanical processing

Drilling and cutting of neodymium magnets carries a risk of fire hazard. Magnetic powder reacts violently with oxygen and is difficult to extinguish.

Finger safety

Large magnets can smash fingers instantly. Do not place your hand between two strong magnets.

No play value

Strictly keep magnets away from children. Risk of swallowing is high, and the consequences of magnets connecting inside the body are fatal.

Operating temperature

Keep cool. Neodymium magnets are susceptible to temperature. If you require resistance above 80°C, look for HT versions (H, SH, UH).

Material brittleness

Protect your eyes. Magnets can fracture upon violent connection, launching shards into the air. Wear goggles.

Allergic reactions

Allergy Notice: The nickel-copper-nickel coating consists of nickel. If an allergic reaction happens, immediately stop working with magnets and use protective gear.

Magnetic media

Powerful magnetic fields can corrupt files on credit cards, HDDs, and storage devices. Keep a distance of min. 10 cm.

Threat to navigation

Be aware: neodymium magnets generate a field that interferes with precision electronics. Maintain a safe distance from your mobile, device, and navigation systems.

Pacemakers

Individuals with a pacemaker must maintain an absolute distance from magnets. The magnetic field can stop the operation of the life-saving device.

Danger! Looking for details? Check our post: Why are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98