UMT 12x20 white / N38 - board holder
board holder
Catalog no 230265
GTIN/EAN: 5906301814283
Diameter Ø
12 mm [±1 mm]
Height
20 mm [±1 mm]
Weight
3.5 g
Coating
[NiCuNi] Nickel
1.894 ZŁ with VAT / pcs + price for transport
1.540 ZŁ net + 23% VAT / pcs
bulk discounts:
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Contact us by phone
+48 22 499 98 98
alternatively drop us a message by means of
request form
the contact section.
Lifting power as well as structure of a neodymium magnet can be calculated on our
force calculator.
Orders placed before 14:00 will be shipped the same business day.
Technical specification - UMT 12x20 white / N38 - board holder
Specification / characteristics - UMT 12x20 white / N38 - board holder
| properties | values |
|---|---|
| Cat. no. | 230265 |
| GTIN/EAN | 5906301814283 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 12 mm [±1 mm] |
| Height | 20 mm [±1 mm] |
| Weight | 3.5 g |
| Coating | [NiCuNi] Nickel |
| Manufacturing Tolerance | ±1 mm |
Magnetic properties of material N38
| 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
| 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 |
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 |
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Pros as well as cons of neodymium magnets.
Benefits
- They have unchanged lifting capacity, and over nearly ten years their attraction force decreases symbolically – ~1% (in testing),
- They have excellent resistance to weakening of magnetic properties due to external magnetic sources,
- By covering with a shiny coating of silver, the element acquires an nice look,
- The surface of neodymium magnets generates a strong magnetic field – this is a distinguishing feature,
- Through (appropriate) combination of ingredients, they can achieve high thermal resistance, enabling functioning at temperatures reaching 230°C and above...
- In view of the ability of flexible shaping and adaptation to specialized projects, neodymium magnets can be created in a broad palette of geometric configurations, which increases their versatility,
- Key role in high-tech industry – they are utilized in data components, brushless drives, medical devices, as well as multitasking production systems.
- Thanks to concentrated force, small magnets offer high operating force, occupying minimum space,
Weaknesses
- Brittleness is one of their disadvantages. Upon intense impact they can fracture. We recommend keeping them in a steel housing, which not only secures them against impacts but also raises their durability
- Neodymium magnets decrease their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
- They rust in a humid environment - during use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
- Limited possibility of producing threads in the magnet and complex forms - preferred is a housing - magnetic holder.
- Potential hazard to health – tiny shards of magnets can be dangerous, if swallowed, which gains importance in the aspect of protecting the youngest. It is also worth noting that tiny parts of these magnets can complicate diagnosis medical after entering the body.
- Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications
Holding force characteristics
Maximum lifting capacity of the magnet – what affects it?
- using a base made of high-permeability steel, serving as a circuit closing element
- whose transverse dimension equals approx. 10 mm
- with a surface perfectly flat
- with direct contact (without paint)
- for force acting at a right angle (in the magnet axis)
- at ambient temperature room level
Lifting capacity in real conditions – factors
- Space between surfaces – every millimeter of separation (caused e.g. by varnish or dirt) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
- Force direction – declared lifting capacity refers to detachment vertically. When attempting to slide, the magnet holds significantly lower power (often approx. 20-30% of nominal force).
- Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of generating force.
- Chemical composition of the base – mild steel attracts best. Alloy steels reduce magnetic permeability and holding force.
- Surface condition – ground elements guarantee perfect abutment, which improves force. Uneven metal reduce efficiency.
- Thermal environment – temperature increase results in weakening of induction. It is worth remembering the thermal limit for a given model.
Lifting capacity testing was performed on a smooth plate of suitable thickness, under a perpendicular pulling force, whereas under attempts to slide the magnet the lifting capacity is smaller. In addition, even a minimal clearance between the magnet and the plate reduces the load capacity.
H&S for magnets
Swallowing risk
Neodymium magnets are not intended for children. Eating several magnets may result in them pinching intestinal walls, which constitutes a critical condition and requires immediate surgery.
Handling rules
Exercise caution. Rare earth magnets act from a long distance and snap with huge force, often faster than you can move away.
Combustion hazard
Dust produced during cutting of magnets is combustible. Do not drill into magnets unless you are an expert.
Maximum temperature
Standard neodymium magnets (N-type) lose power when the temperature goes above 80°C. This process is irreversible.
Warning for heart patients
Patients with a pacemaker must keep an safe separation from magnets. The magnetic field can stop the functioning of the life-saving device.
GPS and phone interference
GPS units and mobile phones are highly susceptible to magnetism. Direct contact with a strong magnet can decalibrate the internal compass in your phone.
Magnetic media
Avoid bringing magnets close to a wallet, computer, or TV. The magnetic field can destroy these devices and erase data from cards.
Allergy Warning
Certain individuals suffer from a hypersensitivity to nickel, which is the common plating for NdFeB magnets. Extended handling may cause a rash. We recommend wear safety gloves.
Crushing force
Pinching hazard: The pulling power is so great that it can cause hematomas, crushing, and even bone fractures. Use thick gloves.
Magnet fragility
Neodymium magnets are ceramic materials, which means they are very brittle. Collision of two magnets leads to them breaking into shards.
Tabela kosztu i czasu dostawy
Płatność przed wysyłką:
GLS kurier
Przesyłka będzie u Ciebie za 2-3 dni
14.99 ZŁ
InPost Paczkomaty 24/7
Przesyłka będzie u Ciebie za 1-2 dni
12.30 ZŁ
Płatność przy odbiorze (pobranie):
GLS kurier
Przesyłka będzie u Ciebie za 1-2 dni
23.00 ZŁ
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