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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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Physical properties - 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% |
Sustainability
| 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.
Strengths
- They do not lose magnetism, even during around ten years – the drop in lifting capacity is only ~1% (according to tests),
- Neodymium magnets prove to be extremely resistant to magnetic field loss caused by external field sources,
- By using a reflective layer of nickel, the element has an modern look,
- Magnets exhibit impressive magnetic induction on the active area,
- Neodymium magnets are characterized by very high magnetic induction on the magnet surface and are able to act (depending on the shape) even at a temperature of 230°C or more...
- Possibility of accurate creating and adjusting to atypical needs,
- Universal use in high-tech industry – they are commonly used in hard drives, electromotive mechanisms, diagnostic systems, as well as other advanced devices.
- Compactness – despite small sizes they provide effective action, 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 steel housing, which not only secures them against impacts but also increases their durability
- When exposed to high temperature, neodymium magnets suffer a drop in power. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
- When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation as well as corrosion.
- We suggest a housing - magnetic mount, due to difficulties in producing threads inside the magnet and complicated forms.
- Health risk to health – tiny shards of magnets are risky, if swallowed, which gains importance in the aspect of protecting the youngest. It is also worth noting that small elements of these magnets are able to be problematic in diagnostics medical after entering the body.
- With large orders the cost of neodymium magnets can be a barrier,
Pull force analysis
Maximum magnetic pulling force – what it depends on?
- using a plate made of low-carbon steel, serving as a ideal flux conductor
- whose thickness is min. 10 mm
- with a plane cleaned and smooth
- under conditions of gap-free contact (metal-to-metal)
- under vertical force vector (90-degree angle)
- in temp. approx. 20°C
Practical lifting capacity: influencing factors
- Space between magnet and steel – every millimeter of separation (caused e.g. by varnish or unevenness) significantly weakens the pulling force, often by half at just 0.5 mm.
- Angle of force application – maximum parameter is available only during pulling at a 90° angle. The resistance to sliding of the magnet along the plate is typically many times lower (approx. 1/5 of the lifting capacity).
- Steel thickness – insufficiently thick sheet does not accept the full field, causing part of the power to be wasted to the other side.
- Metal type – not every steel attracts identically. High carbon content weaken the attraction effect.
- Surface condition – ground elements guarantee perfect abutment, which increases field saturation. Uneven metal reduce efficiency.
- Thermal factor – high temperature weakens pulling force. Exceeding the limit temperature can permanently damage the magnet.
Holding force was measured on the plate surface of 20 mm thickness, when the force acted perpendicularly, whereas under shearing force the holding force is lower. Moreover, even a slight gap between the magnet’s surface and the plate decreases the lifting capacity.
Safe handling of NdFeB magnets
Dust explosion hazard
Fire warning: Neodymium dust is highly flammable. Avoid machining magnets in home conditions as this risks ignition.
Do not give to children
Absolutely keep magnets out of reach of children. Choking hazard is high, and the consequences of magnets connecting inside the body are very dangerous.
Serious injuries
Protect your hands. Two powerful magnets will join instantly with a force of several hundred kilograms, destroying anything in their path. Exercise extreme caution!
Nickel allergy
Certain individuals suffer from a contact allergy to nickel, which is the standard coating for NdFeB magnets. Extended handling may cause a rash. It is best to use safety gloves.
Shattering risk
Despite metallic appearance, the material is delicate and cannot withstand shocks. Avoid impacts, as the magnet may crumble into hazardous fragments.
Safe operation
Before starting, check safety instructions. Uncontrolled attraction can destroy the magnet or hurt your hand. Be predictive.
Electronic devices
Device Safety: Neodymium magnets can ruin payment cards and delicate electronics (heart implants, medical aids, mechanical watches).
Medical interference
Health Alert: Strong magnets can deactivate heart devices and defibrillators. Stay away if you have electronic implants.
GPS and phone interference
A powerful magnetic field negatively affects the operation of magnetometers in smartphones and navigation systems. Maintain magnets near a device to prevent damaging the sensors.
Do not overheat magnets
Do not overheat. Neodymium magnets are sensitive to temperature. If you require operation above 80°C, ask us about special high-temperature series (H, SH, UH).
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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