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
Load capacity
32.00 kg / 313.81 N
Coating
[NiCuNi] Nickel
29.99 ZŁ with VAT / pcs + price for transport
24.38 ZŁ net + 23% VAT / pcs
bulk discounts:
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Technical data of the product - 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 |
| 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 |
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% |
Ecology and recycling (GPSR)
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
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Advantages as well as disadvantages of rare earth magnets.
Benefits
- They retain attractive force for around ten years – the drop is just ~1% (in theory),
- Neodymium magnets are characterized by highly resistant to demagnetization caused by external field sources,
- The use of an refined layer of noble metals (nickel, gold, silver) causes the element to present itself better,
- Neodymium magnets ensure maximum magnetic induction on a small area, which allows for strong attraction,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
- Thanks to freedom in forming and the ability to adapt to individual projects,
- Key role in modern industrial fields – they serve a role in magnetic memories, electric motors, medical equipment, and complex engineering applications.
- Thanks to concentrated force, small magnets offer high operating force, occupying minimum space,
Weaknesses
- At very strong impacts they can crack, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
- We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
- When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation as well as corrosion.
- We suggest casing - magnetic mechanism, due to difficulties in creating nuts inside the magnet and complicated shapes.
- Potential hazard to health – tiny shards of magnets can be dangerous, in case of ingestion, which gains importance in the context of child health protection. Furthermore, tiny parts of these devices are able to be problematic in diagnostics medical in case of swallowing.
- Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications
Pull force analysis
Maximum lifting capacity of the magnet – what it depends on?
- with the contact of a sheet made of low-carbon steel, ensuring maximum field concentration
- with a cross-section of at least 10 mm
- with a plane free of scratches
- with total lack of distance (no impurities)
- for force acting at a right angle (pull-off, not shear)
- at temperature room level
Magnet lifting force in use – key factors
- Space between magnet and steel – every millimeter of distance (caused e.g. by veneer or dirt) drastically reduces the pulling force, often by half at just 0.5 mm.
- Load vector – maximum parameter is reached only during pulling at a 90° angle. The resistance to sliding of the magnet along the surface is standardly many times lower (approx. 1/5 of the lifting capacity).
- Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of converting into lifting capacity.
- Material type – ideal substrate is high-permeability steel. Stainless steels may attract less.
- Surface finish – ideal contact is possible only on smooth steel. Any scratches and bumps reduce the real contact area, reducing force.
- Heat – neodymium magnets have a negative temperature coefficient. When it is hot they lose power, and at low temperatures they can be stronger (up to a certain limit).
Holding force was tested on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, in contrast under parallel forces the lifting capacity is smaller. Moreover, even a small distance between the magnet’s surface and the plate reduces the lifting capacity.
Safe handling of NdFeB magnets
Threat to navigation
A strong magnetic field disrupts the functioning of magnetometers in smartphones and navigation systems. Keep magnets close to a device to avoid breaking the sensors.
Warning for allergy sufferers
Allergy Notice: The nickel-copper-nickel coating contains nickel. If skin irritation appears, immediately stop working with magnets and use protective gear.
Danger to the youngest
Product intended for adults. Small elements can be swallowed, leading to serious injuries. Store away from kids and pets.
Demagnetization risk
Keep cool. Neodymium magnets are sensitive to temperature. If you require resistance above 80°C, ask us about special high-temperature series (H, SH, UH).
Magnets are brittle
Protect your eyes. Magnets can explode upon uncontrolled impact, ejecting sharp fragments into the air. Eye protection is mandatory.
Protect data
Device Safety: Neodymium magnets can damage data carriers and delicate electronics (pacemakers, hearing aids, timepieces).
Powerful field
Handle with care. Rare earth magnets attract from a distance and connect with massive power, often faster than you can react.
Combustion hazard
Dust produced during machining of magnets is self-igniting. Avoid drilling into magnets unless you are an expert.
Medical interference
Health Alert: Strong magnets can turn off pacemakers and defibrillators. Stay away if you have medical devices.
Bone fractures
Danger of trauma: The pulling power is so great that it can result in 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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