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UMGGW 29x8 [M4] GW / N38 - magnetic holder rubber internal thread
magnetic holder rubber internal thread
Catalog no 160305
GTIN/EAN: 5906301813637
Diameter Ø
29 mm [±1 mm]
Height
8 mm [±1 mm]
Weight
18 g
Load capacity
6.40 kg / 62.76 N
8.61 ZŁ with VAT / pcs + price for transport
7.00 ZŁ net + 23% VAT / pcs
bulk discounts:
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Technical of the product - UMGGW 29x8 [M4] GW / N38 - magnetic holder rubber internal thread
Specification / characteristics - UMGGW 29x8 [M4] GW / N38 - magnetic holder rubber internal thread
| properties | values |
|---|---|
| Cat. no. | 160305 |
| GTIN/EAN | 5906301813637 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 29 mm [±1 mm] |
| Height | 8 mm [±1 mm] |
| Weight | 18 g |
| Load capacity ~ ? | 6.40 kg / 62.76 N |
| 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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other proposals
![UMH 75x18x68 [M8] / N38 - magnetic holder with hook](https://cdn3.dhit.pl/graphics/products/umh-75x18x68-m8-wag.jpg "UMH 75x18x68 [M8] / N38 - magnetic holder with hook")
Strengths as well as weaknesses of neodymium magnets.
Pros
- Their magnetic field is durable, and after approximately 10 years it drops only by ~1% (according to research),
- They do not lose their magnetic properties even under strong external field,
- In other words, due to the shiny finish of gold, the element becomes visually attractive,
- Neodymium magnets deliver maximum magnetic induction on a contact point, which increases force concentration,
- Through (appropriate) combination of ingredients, they can achieve high thermal strength, allowing for operation at temperatures approaching 230°C and above...
- Possibility of detailed forming as well as adjusting to specific requirements,
- Key role in modern industrial fields – they are used in HDD drives, motor assemblies, medical equipment, and other advanced devices.
- Compactness – despite small sizes they provide effective action, making them ideal for precision applications
Limitations
- To avoid cracks upon strong impacts, we recommend using special steel holders. Such a solution secures the magnet and simultaneously increases its durability.
- NdFeB magnets lose power when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (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
- When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation and corrosion.
- We suggest cover - magnetic mechanism, due to difficulties in realizing threads inside the magnet and complicated forms.
- Potential hazard resulting from small fragments of magnets pose a threat, when accidentally swallowed, which is particularly important in the context of child health protection. Furthermore, small components of these magnets are able to be problematic in diagnostics medical after entering the body.
- Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications
Lifting parameters
Highest magnetic holding force – what affects it?
- with the application of a yoke made of low-carbon steel, ensuring full magnetic saturation
- whose thickness is min. 10 mm
- with an polished contact surface
- under conditions of ideal adhesion (metal-to-metal)
- for force applied at a right angle (in the magnet axis)
- in stable room temperature
Determinants of lifting force in real conditions
- Gap (betwixt the magnet and the metal), as even a microscopic clearance (e.g. 0.5 mm) results in a decrease in lifting capacity by up to 50% (this also applies to paint, rust or debris).
- Force direction – remember that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops drastically, often to levels of 20-30% of the nominal value.
- Substrate thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
- Material type – ideal substrate is pure iron steel. Cast iron may attract less.
- Surface structure – the more even the plate, the larger the contact zone and higher the lifting capacity. Roughness creates an air distance.
- Temperature influence – hot environment reduces magnetic field. Too high temperature can permanently damage the magnet.
Lifting capacity was assessed with the use of a steel plate with a smooth surface of optimal thickness (min. 20 mm), under perpendicular pulling force, in contrast under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a small distance between the magnet’s surface and the plate reduces the holding force.
Safety rules for work with NdFeB magnets
Adults only
These products are not toys. Eating multiple magnets can lead to them pinching intestinal walls, which poses a critical condition and requires immediate surgery.
Allergic reactions
Warning for allergy sufferers: The Ni-Cu-Ni coating consists of nickel. If an allergic reaction occurs, immediately stop handling magnets and wear gloves.
Impact on smartphones
Remember: rare earth magnets produce a field that disrupts sensitive sensors. Maintain a separation from your phone, tablet, and GPS.
Machining danger
Fire warning: Rare earth powder is highly flammable. Do not process magnets without safety gear as this risks ignition.
Keep away from computers
Powerful magnetic fields can destroy records on payment cards, HDDs, and other magnetic media. Keep a distance of min. 10 cm.
Safe operation
Be careful. Neodymium magnets act from a distance and snap with massive power, often quicker than you can react.
Crushing force
Mind your fingers. Two powerful magnets will snap together immediately with a force of several hundred kilograms, crushing anything in their path. Be careful!
ICD Warning
Patients with a heart stimulator should keep an large gap from magnets. The magnetic field can interfere with the operation of the implant.
Heat sensitivity
Keep cool. Neodymium magnets are sensitive to heat. If you require operation above 80°C, inquire about HT versions (H, SH, UH).
Material brittleness
Protect your eyes. Magnets can fracture upon uncontrolled impact, launching shards into the air. We recommend safety glasses.
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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