HH 42x8.8 [M6] / N38 - through hole magnetic holder
through hole magnetic holder
Catalog no 370484
GTIN: 5906301814948
Diameter Ø [±0,1 mm]
42 mm
Height [±0,1 mm]
8.8 mm
Weight
75.2 g
Magnetization Direction
↑ axial
Load capacity
55 kg / 539.37 N
Coating
[NiCuNi] nickel
29.89 ZŁ with VAT / pcs + price for transport
24.30 ZŁ net + 23% VAT / pcs
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Lifting power and structure of neodymium magnets can be estimated on our
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Magnetic properties of material N38
Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C
Shopping tips
Pros and cons of neodymium magnets.
Besides their tremendous field intensity, neodymium magnets offer the following advantages:
- Their strength remains stable, and after approximately 10 years it decreases only by ~1% (according to research),
- Magnets perfectly protect themselves against demagnetization caused by ambient magnetic noise,
- The use of an refined layer of noble metals (nickel, gold, silver) causes the element to present itself better,
- Magnetic induction on the surface of the magnet turns out to be maximum,
- Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
- Thanks to the option of flexible shaping and customization to custom solutions, magnetic components can be manufactured in a variety of shapes and sizes, which amplifies use scope,
- Huge importance in modern industrial fields – they find application in mass storage devices, electric drive systems, medical equipment, also complex engineering applications.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in small dimensions, which enables their usage in compact constructions
Cons of neodymium magnets: application proposals
- Susceptibility to cracking is one of their disadvantages. Upon strong impact they can fracture. We recommend keeping them in a steel housing, which not only protects them against impacts but also increases their durability
- When exposed to high temperature, neodymium magnets suffer a drop in strength. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
- When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation as well as corrosion.
- Due to limitations in producing threads and complicated forms in magnets, we recommend using casing - magnetic mount.
- Possible danger resulting from small fragments of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child safety. Furthermore, small elements of these devices can disrupt the diagnostic process medical in case of swallowing.
- With budget limitations the cost of neodymium magnets is a challenge,
Optimal lifting capacity of a neodymium magnet – what affects it?
Breakaway force is the result of a measurement for ideal contact conditions, assuming:
- on a plate made of mild steel, effectively closing the magnetic flux
- possessing a thickness of at least 10 mm to avoid saturation
- characterized by lack of roughness
- under conditions of ideal adhesion (surface-to-surface)
- during detachment in a direction perpendicular to the mounting surface
- at room temperature
Practical lifting capacity: influencing factors
In practice, the real power results from many variables, ranked from the most important:
- Space between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by veneer or dirt) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
- Pull-off angle – remember that the magnet holds strongest perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the maximum value.
- Element thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet limits the lifting capacity (the magnet "punches through" it).
- Material type – ideal substrate is pure iron steel. Hardened steels may generate lower lifting capacity.
- Base smoothness – the more even the plate, the better the adhesion and higher the lifting capacity. Unevenness acts like micro-gaps.
- Temperature influence – hot environment weakens magnetic field. Too high temperature can permanently demagnetize the magnet.
* Holding force was checked on the plate surface of 20 mm thickness, when the force acted perpendicularly, however under shearing force the lifting capacity is smaller. Additionally, even a slight gap {between} the magnet’s surface and the plate reduces the holding force.
Warnings
Permanent damage
Standard neodymium magnets (N-type) undergo demagnetization when the temperature surpasses 80°C. Damage is permanent.
Electronic devices
Avoid bringing magnets near a wallet, computer, or TV. The magnetism can permanently damage these devices and erase data from cards.
Crushing force
Danger of trauma: The attraction force is so immense that it can result in blood blisters, crushing, and broken bones. Use thick gloves.
Eye protection
Despite metallic appearance, the material is delicate and not impact-resistant. Do not hit, as the magnet may shatter into sharp, dangerous pieces.
Danger to the youngest
Product intended for adults. Small elements can be swallowed, causing severe trauma. Keep away from children and animals.
Allergic reactions
Studies show that the nickel plating (standard magnet coating) is a common allergen. For allergy sufferers, avoid direct skin contact and choose versions in plastic housing.
Fire warning
Mechanical processing of neodymium magnets poses a fire hazard. Neodymium dust reacts violently with oxygen and is hard to extinguish.
Implant safety
Warning for patients: Strong magnetic fields disrupt medical devices. Maintain minimum 30 cm distance or request help to work with the magnets.
GPS Danger
Remember: neodymium magnets produce a field that disrupts precision electronics. Keep a safe distance from your phone, tablet, and GPS.
Powerful field
Use magnets consciously. Their huge power can shock even experienced users. Be vigilant and do not underestimate their power.
Caution!
Details about risks in the article: Safety of working with magnets.
