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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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Lifting power along with structure of a magnet can be calculated on our
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Detailed specification - 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% |
Environmental data
| 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 Nd2Fe14B magnets.
Benefits
- They do not lose strength, even during around 10 years – the drop in lifting capacity is only ~1% (based on measurements),
- Magnets perfectly resist against demagnetization caused by ambient magnetic noise,
- A magnet with a metallic silver surface has better aesthetics,
- They show high magnetic induction at the operating surface, which increases their power,
- Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
- Thanks to flexibility in designing and the capacity to modify to specific needs,
- Wide application in advanced technology sectors – they are utilized in computer drives, electric motors, medical equipment, also complex engineering applications.
- Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,
Disadvantages
- To avoid cracks upon strong impacts, we recommend using special steel holders. Such a solution protects the magnet and simultaneously increases its durability.
- Neodymium magnets lose 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
- Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
- Due to limitations in realizing nuts and complex shapes in magnets, we propose using a housing - magnetic holder.
- Potential hazard resulting from small fragments of magnets are risky, in case of ingestion, which becomes key in the context of child health protection. It is also worth noting that small components of these devices are able to be problematic in diagnostics medical when they are in the body.
- Due to neodymium price, their price is relatively high,
Pull force analysis
Breakaway strength of the magnet in ideal conditions – what it depends on?
- on a base made of mild steel, optimally conducting the magnetic field
- with a cross-section minimum 10 mm
- with a surface free of scratches
- without the slightest clearance between the magnet and steel
- during detachment in a direction perpendicular to the plane
- at conditions approx. 20°C
Practical lifting capacity: influencing factors
- Distance – existence of foreign body (paint, dirt, gap) interrupts the magnetic circuit, which reduces power rapidly (even by 50% at 0.5 mm).
- Loading method – catalog parameter refers to detachment vertically. When applying parallel force, the magnet holds significantly lower power (often approx. 20-30% of nominal force).
- Steel thickness – too thin plate causes magnetic saturation, causing part of the power to be wasted to the other side.
- Metal type – different alloys reacts the same. Alloy additives worsen the attraction effect.
- Surface finish – full contact is possible only on polished steel. Any scratches and bumps create air cushions, weakening the magnet.
- Thermal factor – hot environment reduces magnetic field. Too high temperature can permanently demagnetize the magnet.
Lifting capacity was assessed using a polished steel plate of suitable thickness (min. 20 mm), under perpendicular pulling force, however under attempts to slide the magnet the holding force is lower. In addition, even a minimal clearance between the magnet and the plate decreases the holding force.
Precautions when working with NdFeB magnets
Power loss in heat
Watch the temperature. Heating the magnet above 80 degrees Celsius will destroy its properties and strength.
Swallowing risk
NdFeB magnets are not suitable for play. Accidental ingestion of several magnets can lead to them pinching intestinal walls, which constitutes a direct threat to life and necessitates immediate surgery.
Machining danger
Fire warning: Rare earth powder is explosive. Do not process magnets without safety gear as this risks ignition.
Impact on smartphones
GPS units and mobile phones are highly susceptible to magnetism. Direct contact with a powerful NdFeB magnet can ruin the internal compass in your phone.
Finger safety
Pinching hazard: The attraction force is so immense that it can cause hematomas, pinching, and broken bones. Use thick gloves.
Caution required
Use magnets with awareness. Their immense force can surprise even professionals. Stay alert and do not underestimate their force.
Safe distance
Intense magnetic fields can destroy records on credit cards, hard drives, and storage devices. Maintain a gap of min. 10 cm.
Allergy Warning
Certain individuals experience a contact allergy to Ni, which is the standard coating for NdFeB magnets. Extended handling may cause an allergic reaction. We suggest use safety gloves.
Fragile material
Protect your eyes. Magnets can explode upon violent connection, ejecting shards into the air. Wear goggles.
Medical implants
For implant holders: Strong magnetic fields affect medical devices. Keep at least 30 cm distance or request help to handle the magnets.
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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