UMH 36x8x46 [M6] / N38 - magnetic holder with hook
magnetic holder with hook
Catalog no 310428
GTIN/EAN: 5906301814573
Diameter Ø
36 mm [±1 mm]
Height
46 mm [±1 mm]
Height
8 mm [±1 mm]
Weight
65 g
Magnetization Direction
↑ axial
Load capacity
43.00 kg / 421.69 N
Coating
[NiCuNi] Nickel
26.64 ZŁ with VAT / pcs + price for transport
21.66 ZŁ net + 23% VAT / pcs
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Technical parameters of the product - UMH 36x8x46 [M6] / N38 - magnetic holder with hook
Specification / characteristics - UMH 36x8x46 [M6] / N38 - magnetic holder with hook
| properties | values |
|---|---|
| Cat. no. | 310428 |
| GTIN/EAN | 5906301814573 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 36 mm [±1 mm] |
| Height | 46 mm [±1 mm] |
| Height | 8 mm [±1 mm] |
| Weight | 65 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 43.00 kg / 421.69 N |
| Coating | [NiCuNi] Nickel |
| 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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Advantages as well as disadvantages of rare earth magnets.
Strengths
- They virtually do not lose power, because even after 10 years the performance loss is only ~1% (based on calculations),
- They are noted for resistance to demagnetization induced by external field influence,
- A magnet with a metallic silver surface is more attractive,
- Neodymium magnets generate maximum magnetic induction on a small area, which increases force concentration,
- Thanks to resistance to high temperature, they are able to function (depending on the shape) even at temperatures up to 230°C and higher...
- In view of the potential of accurate shaping and customization to specialized needs, NdFeB magnets can be created in a wide range of forms and dimensions, which increases their versatility,
- Fundamental importance in innovative solutions – they are utilized in hard drives, brushless drives, advanced medical instruments, and complex engineering applications.
- Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,
Limitations
- To avoid cracks upon strong impacts, we suggest using special steel holders. Such a solution secures the magnet and simultaneously improves its durability.
- We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
- Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material protecting against moisture
- Limited ability of making nuts in the magnet and complex forms - preferred is casing - mounting mechanism.
- Possible danger to health – tiny shards of magnets pose a threat, in case of ingestion, which becomes key in the context of child safety. It is also worth noting that small elements of these magnets are able to complicate diagnosis 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
Holding force characteristics
Highest magnetic holding force – what it depends on?
- with the application of a yoke made of special test steel, ensuring maximum field concentration
- possessing a massiveness of min. 10 mm to avoid saturation
- with a surface perfectly flat
- with total lack of distance (without paint)
- for force applied at a right angle (pull-off, not shear)
- in stable room temperature
Practical aspects of lifting capacity – factors
- Distance (betwixt the magnet and the plate), because even a tiny distance (e.g. 0.5 mm) leads to a drastic drop in lifting capacity by up to 50% (this also applies to paint, corrosion or dirt).
- Pull-off angle – note that the magnet has greatest strength perpendicularly. Under sliding down, the capacity drops drastically, often to levels of 20-30% of the nominal value.
- Steel thickness – insufficiently thick plate does not accept the full field, causing part of the power to be escaped to the other side.
- Chemical composition of the base – mild steel gives the best results. Higher carbon content decrease magnetic properties and holding force.
- Surface finish – full contact is obtained only on polished steel. Rough texture reduce the real contact area, weakening the magnet.
- Thermal environment – heating the magnet causes a temporary drop of induction. 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, whereas under parallel forces the lifting capacity is smaller. Moreover, even a small distance between the magnet’s surface and the plate reduces the holding force.
Safety rules for work with NdFeB magnets
Hand protection
Large magnets can break fingers instantly. Under no circumstances put your hand betwixt two attracting surfaces.
Medical interference
Warning for patients: Powerful magnets affect medical devices. Maintain minimum 30 cm distance or request help to work with the magnets.
Shattering risk
Watch out for shards. Magnets can fracture upon uncontrolled impact, ejecting sharp fragments into the air. Wear goggles.
Metal Allergy
Certain individuals have a hypersensitivity to Ni, which is the typical protective layer for neodymium magnets. Prolonged contact might lead to dermatitis. We strongly advise wear protective gloves.
Conscious usage
Handle magnets with awareness. Their immense force can surprise even professionals. Plan your moves and do not underestimate their power.
Do not drill into magnets
Powder produced during machining of magnets is self-igniting. Do not drill into magnets without proper cooling and knowledge.
Danger to the youngest
Only for adults. Tiny parts can be swallowed, causing serious injuries. Keep away from children and animals.
Keep away from computers
Device Safety: Neodymium magnets can damage payment cards and delicate electronics (pacemakers, medical aids, timepieces).
Power loss in heat
Keep cool. NdFeB magnets are sensitive to temperature. If you need resistance above 80°C, inquire about HT versions (H, SH, UH).
GPS Danger
Navigation devices and smartphones are extremely sensitive to magnetism. Close proximity with a powerful NdFeB magnet can ruin the internal compass in your phone.
