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UMP 79x50 [M8] GW - search holder
search holder
Catalog no 210260
GTIN/EAN: 5906301813934
- Diameter Ø
- 79 mm [±1 mm]
- Height
- 50 mm [±1 mm]
- Weight
- 1.95 g
- Coating
- [NiCuNi] Nickel
270.00 zł with VAT / pcs + price for transport
219.51 zł net + 23% VAT / pcs
bulk discounts:
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Force and shape of magnetic components can be tested on our
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💡 Check why professionals choose Dhit over cheap substitutes
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!
Technical of the product - UMP 79x50 [M8] GW - search holder
Specification / characteristics - UMP 79x50 [M8] GW - search holder
| properties | values |
|---|---|
| Cat. no. | 210260 |
| GTIN/EAN | 5906301813934 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 79 mm [±1 mm] |
| Height | 50 mm [±1 mm] |
| Weight | 1.95 g |
| Load capacity ~ ? | 340.00 kg / 3334.26 N |
| Coating | [NiCuNi] Nickel |
| Manufacturing Tolerance | ±1 mm |
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 rare earth magnets.
Benefits
- They retain full power for nearly 10 years – the drop is just ~1% (in theory),
- Neodymium magnets prove to be exceptionally resistant to loss of magnetic properties caused by external field sources,
- Thanks to the glossy finish, the coating of Ni-Cu-Ni, gold-plated, or silver-plated gives an elegant appearance,
- Magnetic induction on the surface of the magnet is exceptional,
- 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...
- Possibility of accurate modeling and modifying to precise applications,
- Universal use in electronics industry – they are used in HDD drives, brushless drives, medical equipment, as well as other advanced devices.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Cons
- Susceptibility to cracking is one of their disadvantages. Upon strong impact they can fracture. We advise keeping them in a special holder, which not only protects them against impacts but also increases their durability
- Neodymium magnets lose their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
- They oxidize in a humid environment - during use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
- Limited ability of making threads in the magnet and complex forms - preferred is cover - magnetic holder.
- Possible danger to health – tiny shards of magnets are risky, if swallowed, which becomes key in the context of child safety. It is also worth noting that small components of these products can be problematic in diagnostics medical in case of swallowing.
- Due to complex production process, their price is higher than average,
Holding force characteristics
Maximum lifting capacity of the magnet – what affects it?
- with the contact of a sheet made of special test steel, guaranteeing maximum field concentration
- possessing a thickness of at least 10 mm to ensure full flux closure
- with an ideally smooth contact surface
- with zero gap (without paint)
- for force acting at a right angle (pull-off, not shear)
- at standard ambient temperature
Lifting capacity in real conditions – factors
- Air gap (betwixt the magnet and the plate), as even a very small clearance (e.g. 0.5 mm) results in a reduction in force by up to 50% (this also applies to paint, rust or debris).
- Direction of force – highest force is obtained only during perpendicular pulling. The force required to slide 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 pure iron steel. Stainless steels may generate lower lifting capacity.
- Base smoothness – the smoother and more polished the surface, the larger the contact zone and higher the lifting capacity. Unevenness acts like micro-gaps.
- Operating temperature – NdFeB sinters 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 determined using a steel plate with a smooth surface of suitable thickness (min. 20 mm), under vertically applied force, however under shearing force the load capacity is reduced by as much as 5 times. Moreover, even a minimal clearance between the magnet and the plate reduces the holding force.
Precautions when working with neodymium magnets
Electronic devices
Device Safety: Neodymium magnets can damage data carriers and delicate electronics (pacemakers, hearing aids, mechanical watches).
Magnet fragility
NdFeB magnets are sintered ceramics, meaning they are prone to chipping. Collision of two magnets leads to them breaking into small pieces.
Warning for heart patients
Health Alert: Strong magnets can deactivate pacemakers and defibrillators. Do not approach if you have electronic implants.
Bodily injuries
Risk of injury: The attraction force is so great that it can result in hematomas, crushing, and even bone fractures. Use thick gloves.
Adults only
Only for adults. Small elements pose a choking risk, causing severe trauma. Store out of reach of kids and pets.
Magnetic interference
GPS units and mobile phones are extremely susceptible to magnetism. Direct contact with a powerful NdFeB magnet can decalibrate the sensors in your phone.
Thermal limits
Do not overheat. Neodymium magnets are susceptible to temperature. If you need operation above 80°C, inquire about special high-temperature series (H, SH, UH).
Conscious usage
Before use, read the rules. Uncontrolled attraction can destroy the magnet or hurt your hand. Think ahead.
Do not drill into magnets
Powder generated during machining of magnets is self-igniting. Do not drill into magnets unless you are an expert.
Nickel coating and allergies
It is widely known that nickel (standard magnet coating) is a strong allergen. For allergy sufferers, prevent touching magnets with bare hands or choose versions in plastic housing.
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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