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UMGGW 66x8.5 [M8] GW / N38 - magnetic holder rubber internal thread
magnetic holder rubber internal thread
Catalog no 160308
GTIN/EAN: 5906301813668
Diameter Ø
66 mm [±1 mm]
Height
8.5 mm [±1 mm]
Weight
100 g
Load capacity
18.40 kg / 180.44 N
23.37 ZŁ with VAT / pcs + price for transport
19.00 ZŁ net + 23% VAT / pcs
bulk discounts:
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Strength and shape of neodymium magnets can be verified using our
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Product card - UMGGW 66x8.5 [M8] GW / N38 - magnetic holder rubber internal thread
Specification / characteristics - UMGGW 66x8.5 [M8] GW / N38 - magnetic holder rubber internal thread
| properties | values |
|---|---|
| Cat. no. | 160308 |
| GTIN/EAN | 5906301813668 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 66 mm [±1 mm] |
| Height | 8.5 mm [±1 mm] |
| Weight | 100 g |
| Load capacity ~ ? | 18.40 kg / 180.44 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 |
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% |
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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Pros as well as cons of rare earth magnets.
Strengths
- They have stable power, and over more than ten years their attraction force decreases symbolically – ~1% (according to theory),
- They are resistant to demagnetization induced by external disturbances,
- A magnet with a shiny gold surface has an effective appearance,
- They feature high magnetic induction at the operating surface, making them more effective,
- Through (adequate) combination of ingredients, they can achieve high thermal strength, allowing for operation at temperatures reaching 230°C and above...
- Possibility of accurate forming as well as adapting to individual conditions,
- Universal use in modern industrial fields – they find application in HDD drives, electromotive mechanisms, advanced medical instruments, also industrial machines.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
Disadvantages
- At strong impacts they can break, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
- NdFeB magnets lose strength when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop 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 extremely resistant to heat
- Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material stable to moisture, in case of application outdoors
- Limited ability of producing nuts in the magnet and complex forms - recommended is cover - mounting mechanism.
- Potential hazard to health – tiny shards of magnets can be dangerous, if swallowed, which is particularly important in the aspect of protecting the youngest. Additionally, tiny parts of these devices are able to be problematic in diagnostics medical when they are in the body.
- With mass production the cost of neodymium magnets can be a barrier,
Holding force characteristics
Maximum lifting force for a neodymium magnet – what contributes to it?
- on a plate made of structural steel, effectively closing the magnetic flux
- whose thickness reaches at least 10 mm
- characterized by lack of roughness
- with direct contact (without impurities)
- for force applied at a right angle (in the magnet axis)
- in stable room temperature
What influences lifting capacity in practice
- Clearance – existence of foreign body (rust, dirt, air) acts as an insulator, which reduces power rapidly (even by 50% at 0.5 mm).
- Load vector – highest force is available only during perpendicular pulling. The resistance to sliding of the magnet along the surface is usually several times lower (approx. 1/5 of the lifting capacity).
- Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of converting into lifting capacity.
- Chemical composition of the base – low-carbon steel gives the best results. Alloy steels reduce magnetic permeability and holding force.
- Surface structure – the smoother and more polished the plate, the larger the contact zone and stronger the hold. Unevenness creates an air distance.
- Thermal conditions – neodymium magnets have a negative temperature coefficient. When it is hot they lose power, and at low temperatures gain strength (up to a certain limit).
Lifting capacity testing was conducted on plates with a smooth surface of suitable thickness, under perpendicular forces, whereas under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a slight gap between the magnet and the plate lowers the holding force.
H&S for magnets
Fragile material
Watch out for shards. Magnets can explode upon violent connection, launching shards into the air. We recommend safety glasses.
Magnetic interference
Note: rare earth magnets produce a field that confuses precision electronics. Maintain a safe distance from your mobile, tablet, and navigation systems.
Life threat
Health Alert: Neodymium magnets can deactivate heart devices and defibrillators. Do not approach if you have electronic implants.
Dust explosion hazard
Powder produced during cutting of magnets is flammable. Avoid drilling into magnets unless you are an expert.
Operating temperature
Do not overheat. NdFeB magnets are sensitive to temperature. If you require operation above 80°C, inquire about special high-temperature series (H, SH, UH).
Keep away from computers
Intense magnetic fields can destroy records on payment cards, HDDs, and storage devices. Keep a distance of min. 10 cm.
Handling guide
Before use, check safety instructions. Uncontrolled attraction can destroy the magnet or hurt your hand. Think ahead.
Nickel coating and allergies
Studies show that the nickel plating (the usual finish) is a common allergen. If you have an allergy, refrain from direct skin contact or choose coated magnets.
Bodily injuries
Risk of injury: The attraction force is so great that it can result in blood blisters, pinching, and broken bones. Protective gloves are recommended.
Do not give to children
Neodymium magnets are not suitable for play. Swallowing multiple magnets may result in them attracting across intestines, which constitutes a severe health hazard and necessitates immediate surgery.
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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