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UMGGZ 66x8.5 [M8] GZ / N38 - rubber magnetic holder external thread
rubber magnetic holder external thread
Catalog no 340423
GTIN/EAN: 5906301814764
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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Technical of the product - UMGGZ 66x8.5 [M8] GZ / N38 - rubber magnetic holder external thread
Specification / characteristics - UMGGZ 66x8.5 [M8] GZ / N38 - rubber magnetic holder external thread
| properties | values |
|---|---|
| Cat. no. | 340423 |
| GTIN/EAN | 5906301814764 |
| 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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Strengths and weaknesses of rare earth magnets.
Strengths
- They retain magnetic properties for almost ten years – the loss is just ~1% (in theory),
- They feature excellent resistance to magnetic field loss as a result of opposing magnetic fields,
- By covering with a reflective layer of nickel, the element gains an proper look,
- The surface of neodymium magnets generates a intense magnetic field – this is a key feature,
- 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 the ability of flexible molding and adaptation to specialized requirements, NdFeB magnets can be created in a broad palette of geometric configurations, which increases their versatility,
- Significant place in modern technologies – they serve a role in HDD drives, motor assemblies, medical devices, and multitasking production systems.
- Compactness – despite small sizes they generate large force, 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.
- NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
- Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material protecting against moisture
- Due to limitations in realizing threads and complicated forms in magnets, we propose using a housing - magnetic holder.
- Health risk related to microscopic parts of magnets can be dangerous, in case of ingestion, which gains importance in the context of child safety. Furthermore, small elements of these devices are able to disrupt the diagnostic process medical in case of swallowing.
- High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which hinders application in large quantities
Pull force analysis
Maximum lifting capacity of the magnet – what affects it?
- using a base made of low-carbon steel, functioning as a ideal flux conductor
- with a cross-section minimum 10 mm
- characterized by even structure
- under conditions of no distance (surface-to-surface)
- for force acting at a right angle (in the magnet axis)
- at standard ambient temperature
Practical aspects of lifting capacity – factors
- Air gap (betwixt the magnet and the metal), as even a microscopic distance (e.g. 0.5 mm) results in a reduction in force by up to 50% (this also applies to paint, rust or dirt).
- Direction of force – maximum parameter is available only during perpendicular pulling. The resistance to sliding of the magnet along the surface is standardly several times smaller (approx. 1/5 of the lifting capacity).
- Steel thickness – insufficiently thick steel does not accept the full field, causing part of the flux to be escaped to the other side.
- Steel grade – the best choice is pure iron steel. Hardened steels may have worse magnetic properties.
- Base smoothness – the smoother and more polished the plate, the larger the contact zone and stronger the hold. Unevenness acts like micro-gaps.
- Temperature – heating the magnet causes a temporary drop of force. Check the maximum operating temperature for a given model.
Holding force was tested on the plate surface of 20 mm thickness, when the force acted perpendicularly, however under parallel forces the lifting capacity is smaller. In addition, even a slight gap between the magnet and the plate lowers the holding force.
Warnings
Permanent damage
Control the heat. Exposing the magnet to high heat will permanently weaken its properties and pulling force.
Handling guide
Exercise caution. Neodymium magnets attract from a distance and snap with massive power, often quicker than you can react.
Pacemakers
Warning for patients: Strong magnetic fields affect electronics. Maintain minimum 30 cm distance or ask another person to handle the magnets.
Keep away from electronics
An intense magnetic field negatively affects the operation of compasses in phones and GPS navigation. Keep magnets near a device to prevent breaking the sensors.
Keep away from computers
Powerful magnetic fields can erase data on payment cards, hard drives, and other magnetic media. Maintain a gap of min. 10 cm.
Crushing risk
Risk of injury: The attraction force is so great that it can cause blood blisters, pinching, and broken bones. Protective gloves are recommended.
Allergy Warning
Some people suffer from a sensitization to nickel, which is the typical protective layer for NdFeB magnets. Extended handling can result in skin redness. We strongly advise wear safety gloves.
Dust explosion hazard
Mechanical processing of NdFeB material carries a risk of fire hazard. Magnetic powder reacts violently with oxygen and is difficult to extinguish.
Do not give to children
Adult use only. Tiny parts can be swallowed, causing intestinal necrosis. Store away from kids and pets.
Beware of splinters
Despite the nickel coating, neodymium is brittle and cannot withstand shocks. Do not hit, as the magnet may crumble into hazardous fragments.
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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