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UMGGW 34x8 [M4] GW / N38 - magnetic holder rubber internal thread
magnetic holder rubber internal thread
Catalog no 160306
GTIN/EAN: 5906301813644
Diameter Ø
34 mm [±1 mm]
Height
8 mm [±1 mm]
Weight
22 g
Load capacity
7.70 kg / 75.51 N
9.84 ZŁ with VAT / pcs + price for transport
8.00 ZŁ net + 23% VAT / pcs
bulk discounts:
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Technical details - UMGGW 34x8 [M4] GW / N38 - magnetic holder rubber internal thread
Specification / characteristics - UMGGW 34x8 [M4] GW / N38 - magnetic holder rubber internal thread
| properties | values |
|---|---|
| Cat. no. | 160306 |
| GTIN/EAN | 5906301813644 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 34 mm [±1 mm] |
| Height | 8 mm [±1 mm] |
| Weight | 22 g |
| Load capacity ~ ? | 7.70 kg / 75.51 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 |
Elemental analysis
| 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 |
Other deals
![UMH 16x5x32 [M4] / N38 - magnetic holder with hook](https://cdn3.dhit.pl/graphics/products/umh-16x5x32-m4-lak.jpg "UMH 16x5x32 [M4] / N38 - magnetic holder with hook")
Pros and cons of neodymium magnets.
Benefits
- They do not lose magnetism, even over around ten years – the reduction in power is only ~1% (theoretically),
- Magnets perfectly defend themselves against loss of magnetization caused by foreign field sources,
- Thanks to the smooth finish, the layer of Ni-Cu-Ni, gold, or silver gives an visually attractive appearance,
- Magnets exhibit impressive magnetic induction on the outer layer,
- Through (adequate) combination of ingredients, they can achieve high thermal resistance, allowing for operation at temperatures reaching 230°C and above...
- Possibility of exact forming as well as optimizing to defined needs,
- Significant place in high-tech industry – they serve a role in HDD drives, motor assemblies, precision medical tools, and technologically advanced constructions.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
Weaknesses
- Brittleness is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a special holder, which not only protects them against impacts but also raises their durability
- Neodymium magnets decrease their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. 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 advise using waterproof magnets made of rubber, plastic or other material resistant to moisture, when using outdoors
- Limited possibility of making nuts in the magnet and complex shapes - recommended is casing - mounting mechanism.
- Possible danger to health – tiny shards of magnets pose a threat, when accidentally swallowed, which is particularly important in the context of child safety. It is also worth noting that tiny parts of these magnets are able to be problematic in diagnostics medical when they are in the body.
- With budget limitations the cost of neodymium magnets is a challenge,
Pull force analysis
Maximum magnetic pulling force – what it depends on?
- using a base made of high-permeability steel, acting as a circuit closing element
- possessing a thickness of minimum 10 mm to ensure full flux closure
- with a plane cleaned and smooth
- with total lack of distance (without impurities)
- during detachment in a direction perpendicular to the plane
- at room temperature
Impact of factors on magnetic holding capacity in practice
- Distance (between the magnet and the plate), because even a tiny clearance (e.g. 0.5 mm) can cause a reduction in force by up to 50% (this also applies to varnish, rust or debris).
- Direction of force – highest force is obtained only during perpendicular pulling. The resistance to sliding of the magnet along the plate is standardly many times lower (approx. 1/5 of the lifting capacity).
- Metal thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of generating force.
- Metal type – not every steel reacts the same. High carbon content worsen the attraction effect.
- Surface finish – ideal contact is obtained only on smooth steel. Rough texture create air cushions, reducing force.
- Operating temperature – neodymium magnets have a sensitivity to temperature. When it is hot they lose power, and at low temperatures they can be stronger (up to a certain limit).
Lifting capacity was determined with the use of a smooth steel plate of suitable thickness (min. 20 mm), under perpendicular pulling force, whereas under shearing force the lifting capacity is smaller. In addition, even a slight gap between the magnet’s surface and the plate lowers the lifting capacity.
H&S for magnets
Pinching danger
Large magnets can crush fingers instantly. Never put your hand between two attracting surfaces.
Data carriers
Intense magnetic fields can destroy records on payment cards, HDDs, and other magnetic media. Maintain a gap of at least 10 cm.
Phone sensors
A powerful magnetic field interferes with the operation of compasses in smartphones and navigation systems. Maintain magnets near a device to prevent breaking the sensors.
Danger to pacemakers
Patients with a pacemaker must keep an large gap from magnets. The magnetic field can interfere with the operation of the life-saving device.
Nickel allergy
Warning for allergy sufferers: The nickel-copper-nickel coating consists of nickel. If an allergic reaction appears, cease handling magnets and wear gloves.
Do not underestimate power
Handle magnets consciously. Their huge power can shock even professionals. Be vigilant and do not underestimate their power.
Dust is flammable
Drilling and cutting of NdFeB material carries a risk of fire hazard. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.
Permanent damage
Keep cool. Neodymium magnets are sensitive to temperature. If you require operation above 80°C, inquire about special high-temperature series (H, SH, UH).
Adults only
These products are not toys. Eating multiple magnets can lead to them pinching intestinal walls, which constitutes a direct threat to life and requires urgent medical intervention.
Shattering risk
NdFeB magnets are ceramic materials, meaning they are very brittle. Clashing of two magnets will cause them shattering into small pieces.
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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