UMC 42x7/4x9 / N38 - cylindrical magnetic holder
cylindrical magnetic holder
Catalog no 320411
GTIN/EAN: 5906301814672
- Diameter
- 42 mm [±1 mm]
- internal diameter Ø
- 7/4 mm [±1 mm]
- Height
- 9 mm [±1 mm]
- Weight
- 72 g
- Magnetization Direction
- ↑ axial
- Coating
- [NiCuNi] Nickel
29.99 zł with VAT / pcs + price for transport
24.38 zł net + 23% VAT / pcs
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Technical data - UMC 42x7/4x9 / N38 - cylindrical magnetic holder
Specification / characteristics - UMC 42x7/4x9 / N38 - cylindrical magnetic holder
| properties | values |
|---|---|
| Cat. no. | 320411 |
| GTIN/EAN | 5906301814672 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter | 42 mm [±1 mm] |
| internal diameter Ø | 7/4 mm [±1 mm] |
| Height | 9 mm [±1 mm] |
| Weight | 72 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 32.00 kg / 313.81 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 |
Other deals
![UMGGZ 22x6 [M4] GZ / N38 - rubber magnetic holder external thread](https://cdn3.dhit.pl/graphics/products/umg-22x6-m4-gz-hiw.jpg "UMGGZ 22x6 [M4] GZ / N38 - rubber magnetic holder external thread")
Advantages as well as disadvantages of rare earth magnets.
Pros
- They do not lose strength, even over around ten years – the reduction in power is only ~1% (according to tests),
- They retain their magnetic properties even under close interference source,
- In other words, due to the glossy finish of silver, the element looks attractive,
- Magnets are characterized by exceptionally strong magnetic induction on the outer side,
- Neodymium magnets are characterized by very high magnetic induction on the magnet surface and are able to act (depending on the form) even at a temperature of 230°C or more...
- Considering the potential of precise shaping and adaptation to unique needs, magnetic components can be produced in a variety of geometric configurations, which expands the range of possible applications,
- Wide application in high-tech industry – they are used in mass storage devices, electromotive mechanisms, diagnostic systems, and industrial machines.
- Compactness – despite small sizes they provide effective action, making them ideal for precision applications
Disadvantages
- They are prone to damage upon too strong impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only shields the magnet but also increases its resistance to damage
- NdFeB magnets lose power 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
- Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material resistant to moisture, in case of application outdoors
- Limited possibility of making threads in the magnet and complex forms - preferred is a housing - magnet mounting.
- Health risk to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which is particularly important in the aspect of protecting the youngest. It is also worth noting that tiny parts of these products can disrupt the diagnostic process medical when they are in the body.
- High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which increases costs of application in large quantities
Holding force characteristics
Detachment force of the magnet in optimal conditions – what affects it?
- using a base made of mild steel, serving as a circuit closing element
- with a thickness no less than 10 mm
- with an ideally smooth touching surface
- with total lack of distance (without coatings)
- under perpendicular force vector (90-degree angle)
- at ambient temperature room level
Magnet lifting force in use – key factors
- Clearance – existence of foreign body (rust, dirt, gap) acts as an insulator, which lowers capacity rapidly (even by 50% at 0.5 mm).
- Pull-off angle – note that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the nominal value.
- Element thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
- Plate material – mild steel attracts best. Alloy steels decrease magnetic permeability and holding force.
- Base smoothness – the smoother and more polished the surface, the larger the contact zone and stronger the hold. Roughness acts like micro-gaps.
- Heat – neodymium magnets have a sensitivity to temperature. At higher temperatures they are weaker, and at low temperatures they can be stronger (up to a certain limit).
Lifting capacity was assessed using a polished steel plate of suitable thickness (min. 20 mm), under vertically applied force, however under attempts to slide the magnet the load capacity is reduced by as much as fivefold. Additionally, even a small distance between the magnet’s surface and the plate reduces the load capacity.
Precautions when working with NdFeB magnets
Beware of splinters
Despite the nickel coating, the material is brittle and not impact-resistant. Avoid impacts, as the magnet may crumble into hazardous fragments.
Allergy Warning
Studies show that the nickel plating (standard magnet coating) is a common allergen. If you have an allergy, refrain from direct skin contact or opt for coated magnets.
Handling guide
Exercise caution. Neodymium magnets attract from a distance and connect with massive power, often faster than you can move away.
Serious injuries
Pinching hazard: The attraction force is so great that it can cause hematomas, crushing, and broken bones. Use thick gloves.
Life threat
For implant holders: Powerful magnets disrupt electronics. Maintain minimum 30 cm distance or ask another person to handle the magnets.
Fire risk
Dust produced during grinding of magnets is self-igniting. Avoid drilling into magnets unless you are an expert.
Safe distance
Do not bring magnets near a purse, computer, or screen. The magnetism can irreversibly ruin these devices and wipe information from cards.
Threat to navigation
Note: rare earth magnets produce a field that confuses precision electronics. Keep a separation from your mobile, tablet, and navigation systems.
Swallowing risk
Absolutely keep magnets out of reach of children. Risk of swallowing is significant, and the consequences of magnets connecting inside the body are very dangerous.
Heat sensitivity
Regular neodymium magnets (N-type) lose magnetization when the temperature surpasses 80°C. This process is irreversible.
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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