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UMP 50x20 [M8] GW / N38 - search holder
search holder
Catalog no 210231
GTIN/EAN: 5906301813910
Diameter Ø
50 mm [±1 mm]
Height
20 mm [±1 mm]
Weight
0.6 g
Load capacity
130.00 kg / 1274.86 N
Coating
[NiCuNi] Nickel
77.00 ZŁ with VAT / pcs + price for transport
62.60 ZŁ net + 23% VAT / pcs
bulk discounts:
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Lifting power and form of magnets can be calculated with our
magnetic mass calculator.
Orders placed before 14:00 will be shipped the same business day.
💡 Guide: How to choose a decent magnet and not get ripped off?
Instead of believing fairy tales on YouTube with tests on uncertified equipment, see what really determines your magnet's power:
- 📏 Magnet thickness in the casing (min. 10mm) – This is what matters most! Thin magnets are weak. Thanks to the 1cm thickness of N52 neodymium, your magnet "sees" metal even through thick rust and mud.
- 🛡️ Armored protection (Black Epoxy) – Forget about rust. This coating doesn't chip when hitting rocks and protects the magnet in water much better than regular nickel, which fails quickly.
- 🧲 Eyelets that don't steal power – Made of special non-magnetic steel, so they don't stick to the magnet and don't block the force. Important: mount only one eyelet at a time! Using 3 at once is a mistake that weakens the magnet.
- 🧶 Certified rope (min. 8mm) – You gain the certainty that your gear won't stay at the bottom. It's thick and comfortable, so it doesn't cut your fingers when pulling out heavy scrap metal.
- 🚀 Our advantage: We are the only ones combining the strongest N52 neodymium (10mm thick) with non-magnetic eyelets. This is real power and durability you won't find anywhere else.
Invest in solid equipment and enjoy the results!
Detailed specification - UMP 50x20 [M8] GW / N38 - search holder
Specification / characteristics - UMP 50x20 [M8] GW / N38 - search holder
| properties | values |
|---|---|
| Cat. no. | 210231 |
| GTIN/EAN | 5906301813910 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 50 mm [±1 mm] |
| Height | 20 mm [±1 mm] |
| Weight | 0.6 g |
| Load capacity ~ ? | 130.00 kg / 1274.86 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 |
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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Advantages and disadvantages of Nd2Fe14B magnets.
Benefits
- Their magnetic field remains stable, and after approximately ten years it decreases only by ~1% (theoretically),
- Magnets effectively defend themselves against loss of magnetization caused by foreign field sources,
- In other words, due to the reflective layer of nickel, the element looks attractive,
- Neodymium magnets generate maximum magnetic induction on a small area, which increases force concentration,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
- Thanks to versatility in constructing and the ability to customize to specific needs,
- Significant place in electronics industry – they find application in data components, electric drive systems, precision medical tools, also multitasking production systems.
- Thanks to concentrated force, small magnets offer high operating force, occupying minimum space,
Cons
- They are fragile upon too strong impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only protects the magnet but also improves its resistance to damage
- Neodymium 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 and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
- Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
- Limited possibility of creating threads in the magnet and complex shapes - recommended is a housing - mounting mechanism.
- Possible danger resulting from small fragments of magnets are risky, in case of ingestion, which gains importance in the context of child health protection. Additionally, small elements of these products can disrupt the diagnostic process medical in case of swallowing.
- With budget limitations the cost of neodymium magnets can be a barrier,
Holding force characteristics
Maximum lifting capacity of the magnet – what contributes to it?
- using a plate made of high-permeability steel, serving as a circuit closing element
- with a cross-section of at least 10 mm
- with an polished touching surface
- without any clearance between the magnet and steel
- for force acting at a right angle (pull-off, not shear)
- at conditions approx. 20°C
Lifting capacity in real conditions – factors
- Distance (betwixt the magnet and the plate), because even a microscopic clearance (e.g. 0.5 mm) results in a drastic drop in force by up to 50% (this also applies to paint, rust or debris).
- Force direction – declared lifting capacity refers to detachment vertically. When attempting to slide, the magnet holds much less (often approx. 20-30% of maximum force).
- Plate thickness – too thin plate causes magnetic saturation, causing part of the power to be escaped to the other side.
- Plate material – low-carbon steel attracts best. Higher carbon content reduce magnetic properties and holding force.
- Surface condition – ground elements ensure maximum contact, which improves field saturation. Rough surfaces weaken the grip.
- Temperature – temperature increase causes a temporary drop of force. It is worth remembering the thermal limit for a given model.
Lifting capacity testing was performed on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, in contrast under attempts to slide the magnet the holding force is lower. In addition, even a small distance between the magnet’s surface and the plate lowers the load capacity.
Precautions when working with NdFeB magnets
No play value
Always store magnets out of reach of children. Choking hazard is significant, and the consequences of magnets connecting inside the body are tragic.
Maximum temperature
Control the heat. Heating the magnet to high heat will permanently weaken its magnetic structure and pulling force.
Fire risk
Mechanical processing of neodymium magnets poses a fire hazard. Neodymium dust reacts violently with oxygen and is hard to extinguish.
Conscious usage
Exercise caution. Neodymium magnets attract from a distance and snap with huge force, often faster than you can react.
Avoid contact if allergic
It is widely known that nickel (standard magnet coating) is a potent allergen. If your skin reacts to metals, refrain from direct skin contact and choose coated magnets.
Eye protection
Neodymium magnets are sintered ceramics, which means they are prone to chipping. Clashing of two magnets will cause them breaking into shards.
Threat to navigation
GPS units and smartphones are extremely susceptible to magnetism. Close proximity with a powerful NdFeB magnet can permanently damage the sensors in your phone.
Crushing force
Pinching hazard: The attraction force is so great that it can cause blood blisters, crushing, and even bone fractures. Use thick gloves.
Magnetic media
Device Safety: Strong magnets can ruin data carriers and sensitive devices (pacemakers, hearing aids, mechanical watches).
Health Danger
People with a ICD must maintain an large gap from magnets. The magnetic field can interfere with the functioning of the life-saving device.
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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