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HH 42x8.8 [M6] / N38 - through hole magnetic holder
through hole magnetic holder
Catalog no 370484
GTIN/EAN: 5906301814948
Diameter Ø
42 mm [±1 mm]
Height
8.8 mm [±1 mm]
Weight
75.2 g
Magnetization Direction
↑ axial
Load capacity
55.00 kg / 539.37 N
Coating
[NiCuNi] Nickel
29.89 ZŁ with VAT / pcs + price for transport
24.30 ZŁ net + 23% VAT / pcs
bulk discounts:
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Detailed specification - HH 42x8.8 [M6] / N38 - through hole magnetic holder
Specification / characteristics - HH 42x8.8 [M6] / N38 - through hole magnetic holder
| properties | values |
|---|---|
| Cat. no. | 370484 |
| GTIN/EAN | 5906301814948 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 42 mm [±1 mm] |
| Height | 8.8 mm [±1 mm] |
| Weight | 75.2 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 55.00 kg / 539.37 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% |
Ecology and recycling (GPSR)
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other offers
![UMH 25x8x45 [M5] / N38 - magnetic holder with hook](https://cdn3.dhit.pl/graphics/products/umh-25x8x45-m5-cep.jpg "UMH 25x8x45 [M5] / N38 - magnetic holder with hook")
![HH 25x7.7 [M5] / N38 - through hole magnetic holder](https://cdn3.dhit.pl/graphics/products/hh-25x7.7-m5-pov.jpg "HH 25x7.7 [M5] / N38 - through hole magnetic holder")
Pros as well as cons of rare earth magnets.
Strengths
- They have constant strength, and over more than ten years their performance decreases symbolically – ~1% (in testing),
- They are resistant to demagnetization induced by presence of other magnetic fields,
- By applying a reflective coating of silver, the element gains an proper look,
- Neodymium magnets generate maximum magnetic induction on a contact point, which ensures high operational effectiveness,
- Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
- Possibility of exact modeling as well as adapting to specific needs,
- Wide application in high-tech industry – they serve a role in data components, electric motors, advanced medical instruments, also complex engineering applications.
- Relatively small size with high pulling force – neodymium magnets offer high power in compact dimensions, which enables their usage in compact constructions
Disadvantages
- To avoid cracks under impact, we suggest using special steel holders. Such a solution secures the magnet and simultaneously improves its durability.
- Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of strength (a factor is the shape and 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 rust. Therefore when using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material protecting against moisture
- Due to limitations in producing threads and complex forms in magnets, we propose using a housing - magnetic mechanism.
- Potential hazard related to microscopic parts of magnets pose a threat, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. It is also worth noting that tiny parts of these products can be problematic in diagnostics medical in case of swallowing.
- With mass production the cost of neodymium magnets is a challenge,
Pull force analysis
Best holding force of the magnet in ideal parameters – what it depends on?
- on a block made of structural steel, perfectly concentrating the magnetic field
- with a thickness of at least 10 mm
- characterized by even structure
- with zero gap (no impurities)
- during detachment in a direction vertical to the mounting surface
- at standard ambient temperature
Lifting capacity in real conditions – factors
- Gap between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by varnish or dirt) diminishes the magnet efficiency, often by half at just 0.5 mm.
- Loading method – declared lifting capacity refers to detachment vertically. When applying parallel force, the magnet holds significantly lower power (typically approx. 20-30% of nominal force).
- Metal thickness – the thinner the sheet, the weaker the hold. 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 possible only on smooth steel. Any scratches and bumps reduce the real contact area, reducing force.
- Temperature influence – high temperature reduces pulling force. Too high temperature can permanently damage the magnet.
Lifting capacity testing was conducted on a smooth plate of optimal thickness, under perpendicular forces, however under attempts to slide the magnet the load capacity is reduced by as much as 5 times. In addition, even a minimal clearance between the magnet and the plate lowers the lifting capacity.
H&S for magnets
Dust explosion hazard
Dust generated during machining of magnets is flammable. Avoid drilling into magnets without proper cooling and knowledge.
Choking Hazard
NdFeB magnets are not toys. Eating multiple magnets can lead to them pinching intestinal walls, which constitutes a severe health hazard and requires urgent medical intervention.
GPS and phone interference
Note: rare earth magnets generate a field that confuses precision electronics. Keep a safe distance from your phone, tablet, and navigation systems.
Shattering risk
Despite the nickel coating, the material is delicate and cannot withstand shocks. Do not hit, as the magnet may shatter into hazardous fragments.
Safe operation
Before use, read the rules. Uncontrolled attraction can destroy the magnet or injure your hand. Be predictive.
Medical implants
Individuals with a pacemaker have to maintain an absolute distance from magnets. The magnetism can disrupt the operation of the life-saving device.
Maximum temperature
Keep cool. Neodymium magnets are susceptible to temperature. If you need resistance above 80°C, look for HT versions (H, SH, UH).
Safe distance
Avoid bringing magnets near a wallet, laptop, or TV. The magnetic field can irreversibly ruin these devices and erase data from cards.
Finger safety
Mind your fingers. Two large magnets will join instantly with a force of several hundred kilograms, destroying anything in their path. Exercise extreme caution!
Avoid contact if allergic
Warning for allergy sufferers: The nickel-copper-nickel coating consists of nickel. If redness happens, immediately stop handling magnets and wear gloves.
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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