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UMGW 36x18x8 [M8] GW / N38 - magnetic holder internal thread
magnetic holder internal thread
Catalog no 180319
GTIN/EAN: 5906301813750
Diameter Ø
36 mm [±1 mm]
Height
18 mm [±1 mm]
Height
8 mm [±1 mm]
Weight
52 g
Load capacity
40.00 kg / 392.27 N
23.99 ZŁ with VAT / pcs + price for transport
19.50 ZŁ net + 23% VAT / pcs
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Physical properties - UMGW 36x18x8 [M8] GW / N38 - magnetic holder internal thread
Specification / characteristics - UMGW 36x18x8 [M8] GW / N38 - magnetic holder internal thread
| properties | values |
|---|---|
| Cat. no. | 180319 |
| GTIN/EAN | 5906301813750 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 36 mm [±1 mm] |
| Height | 18 mm [±1 mm] |
| Height | 8 mm [±1 mm] |
| Weight | 52 g |
| Load capacity ~ ? | 40.00 kg / 392.27 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 |
Chemical composition
| 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 and cons of rare earth magnets.
Benefits
- They have constant strength, and over more than 10 years their performance decreases symbolically – ~1% (according to theory),
- Magnets effectively resist against loss of magnetization caused by external fields,
- A magnet with a smooth gold surface is more attractive,
- The surface of neodymium magnets generates a strong magnetic field – this is a key feature,
- 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...
- Thanks to modularity in constructing and the capacity to customize to individual projects,
- Wide application in advanced technology sectors – they are used in HDD drives, brushless drives, medical equipment, and other advanced devices.
- Compactness – despite small sizes they provide effective action, making them ideal for precision applications
Limitations
- At strong impacts they can crack, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
- Neodymium magnets decrease 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 stability even at temperatures up to 230°C
- Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture, when using outdoors
- Due to limitations in producing threads and complex forms in magnets, we propose using cover - magnetic mount.
- Possible danger resulting from small fragments of magnets pose a threat, if swallowed, which gains importance in the aspect of protecting the youngest. It is also worth noting that small components of these products are able to be problematic in diagnostics medical when they are in the body.
- High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which increases costs of application in large quantities
Lifting parameters
Magnetic strength at its maximum – what it depends on?
- using a sheet made of mild steel, functioning as a magnetic yoke
- with a cross-section minimum 10 mm
- with an polished contact surface
- without any air gap between the magnet and steel
- for force acting at a right angle (pull-off, not shear)
- at room temperature
Lifting capacity in real conditions – factors
- Space between surfaces – every millimeter of separation (caused e.g. by varnish or unevenness) drastically reduces the pulling force, often by half at just 0.5 mm.
- Load vector – maximum parameter is obtained only during perpendicular pulling. The resistance to sliding 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. Part of the magnetic field passes through the material instead of generating force.
- Material type – ideal substrate is pure iron steel. Hardened steels may attract less.
- Surface structure – the smoother and more polished the plate, the better the adhesion and higher the lifting capacity. Unevenness acts like micro-gaps.
- Thermal conditions – neodymium magnets have a sensitivity to temperature. At higher temperatures they are weaker, and in frost they can be stronger (up to a certain limit).
Holding force was measured on the plate surface of 20 mm thickness, when a perpendicular force was applied, whereas under attempts to slide the magnet the load capacity is reduced by as much as fivefold. Additionally, even a minimal clearance between the magnet and the plate decreases the holding force.
Precautions when working with NdFeB magnets
Magnets are brittle
Protect your eyes. Magnets can explode upon violent connection, ejecting sharp fragments into the air. Eye protection is mandatory.
Compass and GPS
Be aware: rare earth magnets generate a field that confuses sensitive sensors. Maintain a separation from your mobile, device, and navigation systems.
This is not a toy
Product intended for adults. Tiny parts can be swallowed, causing serious injuries. Store away from kids and pets.
Do not overheat magnets
Avoid heat. NdFeB magnets are susceptible to heat. If you require resistance above 80°C, ask us about HT versions (H, SH, UH).
Warning for heart patients
Life threat: Neodymium magnets can deactivate pacemakers and defibrillators. Do not approach if you have electronic implants.
Avoid contact if allergic
Some people have a contact allergy to Ni, which is the standard coating for NdFeB magnets. Extended handling might lead to an allergic reaction. It is best to wear safety gloves.
Magnetic media
Very strong magnetic fields can destroy records on credit cards, hard drives, and other magnetic media. Stay away of min. 10 cm.
Safe operation
Use magnets with awareness. Their immense force can shock even experienced users. Plan your moves and do not underestimate their power.
Finger safety
Big blocks can smash fingers instantly. Never place your hand between two strong magnets.
Flammability
Powder generated during cutting of magnets is flammable. Do not drill into magnets unless you are an expert.
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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