UMC 25x6/4x8 / N38 - cylindrical magnetic holder
cylindrical magnetic holder
Catalog no 320408
GTIN/EAN: 5906301814641
Diameter
25 mm [±1 mm]
internal diameter Ø
6/4 mm [±1 mm]
Height
8 mm [±1 mm]
Weight
21 g
Load capacity
14.00 kg / 137.29 N
Coating
[NiCuNi] Nickel
11.70 ZŁ with VAT / pcs + price for transport
9.51 ZŁ net + 23% VAT / pcs
bulk discounts:
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Technical parameters - UMC 25x6/4x8 / N38 - cylindrical magnetic holder
Specification / characteristics - UMC 25x6/4x8 / N38 - cylindrical magnetic holder
| properties | values |
|---|---|
| Cat. no. | 320408 |
| GTIN/EAN | 5906301814641 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter | 25 mm [±1 mm] |
| internal diameter Ø | 6/4 mm [±1 mm] |
| Height | 8 mm [±1 mm] |
| Weight | 21 g |
| Load capacity ~ ? | 14.00 kg / 137.29 N |
| 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 |
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% |
Environmental data
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
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Pros and cons of Nd2Fe14B magnets.
Pros
- Their strength remains stable, and after around 10 years it decreases only by ~1% (according to research),
- They maintain their magnetic properties even under external field action,
- In other words, due to the glossy surface of silver, the element gains a professional look,
- They feature high magnetic induction at the operating surface, which increases their power,
- Through (appropriate) combination of ingredients, they can achieve high thermal resistance, enabling operation at temperatures approaching 230°C and above...
- Due to the potential of precise shaping and customization to individualized projects, NdFeB magnets can be manufactured in a wide range of forms and dimensions, which makes them more universal,
- Significant place in innovative solutions – they find application in data components, drive modules, advanced medical instruments, also complex engineering applications.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in small dimensions, which enables their usage in small systems
Limitations
- Susceptibility to cracking is one of their disadvantages. Upon intense impact they can fracture. We advise keeping them in a strong case, which not only secures them against impacts but also raises their durability
- Neodymium magnets lose strength when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape as well as 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
- Magnets exposed to a humid environment can rust. Therefore during using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture
- Due to limitations in producing threads and complicated shapes in magnets, we recommend using a housing - magnetic holder.
- Health risk to health – tiny shards of magnets can be dangerous, if swallowed, which becomes key in the context of child health protection. Additionally, small components of these devices can complicate diagnosis medical when they are in the body.
- With mass production the cost of neodymium magnets can be a barrier,
Lifting parameters
Maximum lifting capacity of the magnet – what affects it?
- using a plate made of low-carbon steel, serving as a magnetic yoke
- whose thickness equals approx. 10 mm
- characterized by even structure
- with total lack of distance (without paint)
- during detachment in a direction vertical to the mounting surface
- in stable room temperature
Practical lifting capacity: influencing factors
- Gap between surfaces – even a fraction of a millimeter of distance (caused e.g. by varnish or unevenness) diminishes the pulling force, often by half at just 0.5 mm.
- Force direction – remember that the magnet holds strongest perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the nominal value.
- Wall thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of generating force.
- Steel grade – the best choice is pure iron steel. Cast iron may attract less.
- Plate texture – smooth surfaces guarantee perfect abutment, which increases force. Uneven metal weaken the grip.
- Thermal environment – heating the magnet causes a temporary drop of induction. Check the maximum operating temperature for a given model.
Holding force was measured on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, however under parallel forces the holding force is lower. In addition, even a minimal clearance between the magnet’s surface and the plate decreases the holding force.
Safety rules for work with NdFeB magnets
Combustion hazard
Machining of NdFeB material carries a risk of fire risk. Magnetic powder reacts violently with oxygen and is hard to extinguish.
Warning for allergy sufferers
Medical facts indicate that the nickel plating (the usual finish) is a common allergen. If your skin reacts to metals, prevent touching magnets with bare hands and select coated magnets.
Danger to pacemakers
Health Alert: Strong magnets can turn off heart devices and defibrillators. Do not approach if you have medical devices.
Do not underestimate power
Be careful. Neodymium magnets act from a distance and snap with massive power, often quicker than you can move away.
Do not give to children
Only for adults. Tiny parts can be swallowed, leading to serious injuries. Store out of reach of children and animals.
Magnet fragility
NdFeB magnets are sintered ceramics, meaning they are fragile like glass. Collision of two magnets will cause them breaking into shards.
Threat to navigation
Be aware: neodymium magnets produce a field that confuses sensitive sensors. Keep a separation from your phone, tablet, and GPS.
Heat sensitivity
Control the heat. Heating the magnet to high heat will ruin its properties and pulling force.
Electronic hazard
Avoid bringing magnets near a wallet, laptop, or TV. The magnetic field can destroy these devices and erase data from cards.
Pinching danger
Risk of injury: The pulling power is so great that it can cause blood blisters, pinching, and broken bones. Protective gloves are recommended.
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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