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UMGZ 42x20x9 [M8] GZ / N38 - magnetic holder external thread
magnetic holder external thread
Catalog no 190332
GTIN/EAN: 5906301813859
Diameter Ø
42 mm [±1 mm]
Height
20 mm [±1 mm]
Height
9 mm [±1 mm]
Weight
80 g
Load capacity
66.00 kg / 647.24 N
33.96 ZŁ with VAT / pcs + price for transport
27.61 ZŁ net + 23% VAT / pcs
bulk discounts:
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Technical details - UMGZ 42x20x9 [M8] GZ / N38 - magnetic holder external thread
Specification / characteristics - UMGZ 42x20x9 [M8] GZ / N38 - magnetic holder external thread
| properties | values |
|---|---|
| Cat. no. | 190332 |
| GTIN/EAN | 5906301813859 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 42 mm [±1 mm] |
| Height | 20 mm [±1 mm] |
| Height | 9 mm [±1 mm] |
| Weight | 80 g |
| Load capacity ~ ? | 66.00 kg / 647.24 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 neodymium magnets.
Advantages
- They do not lose power, even over approximately ten years – the drop in lifting capacity is only ~1% (according to tests),
- They have excellent resistance to magnetic field loss when exposed to opposing magnetic fields,
- In other words, due to the smooth layer of gold, the element gains visual value,
- Magnets possess impressive magnetic induction on the surface,
- Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can work (depending on the form) even at a temperature of 230°C or more...
- Thanks to versatility in forming and the ability to adapt to complex applications,
- Versatile presence in innovative solutions – they serve a role in computer drives, motor assemblies, medical equipment, as well as other advanced devices.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Limitations
- To avoid cracks under impact, we suggest using special steel holders. Such a solution protects the magnet and simultaneously increases its durability.
- We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
- Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material stable to moisture, in case of application outdoors
- We suggest casing - magnetic holder, due to difficulties in creating threads inside the magnet and complex forms.
- Possible danger to health – tiny shards of magnets are risky, in case of ingestion, which becomes key in the context of child health protection. Additionally, small elements of these magnets can be problematic in diagnostics medical when they are in the body.
- Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications
Pull force analysis
Detachment force of the magnet in optimal conditions – what it depends on?
- with the use of a yoke made of special test steel, ensuring maximum field concentration
- whose transverse dimension equals approx. 10 mm
- with a plane free of scratches
- under conditions of no distance (surface-to-surface)
- under vertical force vector (90-degree angle)
- in stable room temperature
Practical lifting capacity: influencing factors
- Space between magnet and steel – every millimeter of distance (caused e.g. by veneer or dirt) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
- Angle of force application – highest force is reached only during pulling at a 90° angle. The force required to slide of the magnet along the plate is standardly several times smaller (approx. 1/5 of the lifting capacity).
- Steel thickness – too thin plate causes magnetic saturation, causing part of the power to be wasted to the other side.
- Plate material – low-carbon steel gives the best results. Alloy steels reduce magnetic properties and lifting capacity.
- Surface quality – the smoother and more polished the surface, the better the adhesion and stronger the hold. Unevenness creates an air distance.
- Temperature – temperature increase results in weakening of induction. It is worth remembering the thermal limit for a given model.
Lifting capacity testing was carried out on plates with a smooth surface of optimal thickness, under perpendicular forces, whereas under shearing force the holding force is lower. In addition, even a small distance between the magnet’s surface and the plate lowers the load capacity.
Safety rules for work with NdFeB magnets
Allergic reactions
Certain individuals have a contact allergy to Ni, which is the common plating for NdFeB magnets. Frequent touching might lead to a rash. We suggest use safety gloves.
Choking Hazard
Only for adults. Small elements pose a choking risk, causing serious injuries. Store away from children and animals.
Health Danger
Warning for patients: Strong magnetic fields disrupt medical devices. Keep at least 30 cm distance or request help to handle the magnets.
Dust explosion hazard
Mechanical processing of NdFeB material carries a risk of fire hazard. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.
Eye protection
NdFeB magnets are sintered ceramics, meaning they are prone to chipping. Impact of two magnets will cause them breaking into small pieces.
Keep away from electronics
An intense magnetic field negatively affects the operation of compasses in smartphones and GPS navigation. Keep magnets close to a device to prevent breaking the sensors.
Keep away from computers
Powerful magnetic fields can destroy records on payment cards, HDDs, and storage devices. Maintain a gap of min. 10 cm.
Physical harm
Large magnets can crush fingers instantly. Never place your hand between two attracting surfaces.
Heat sensitivity
Watch the temperature. Heating the magnet above 80 degrees Celsius will permanently weaken its magnetic structure and strength.
Respect the power
Before use, check safety instructions. Uncontrolled attraction can destroy the magnet or injure your hand. Think ahead.
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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