UMP 107x40 [M8+M10] GW F 400 kg / N38 - search holder
search holder
Catalog no 210338
GTIN: 5906301813972
Diameter Ø [±0,1 mm]
107 mm
Height [±0,1 mm]
40 mm
Weight
2350 g
Load capacity
480 kg / 4707.19 N
Coating
[NiCuNi] nickel
400.00 ZŁ with VAT / pcs + price for transport
325.20 ZŁ net + 23% VAT / pcs
bulk discounts:
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UMP 107x40 [M8+M10] GW F 400 kg / N38 - search holder
Magnetic properties of material N38
Physical properties of NdFeB
Shopping tips

Advantages as well as disadvantages of neodymium magnets NdFeB.
Apart from their strong holding force, neodymium magnets have these key benefits:
- They retain their magnetic properties for almost ten years – the drop is just ~1% (according to analyses),
- They show exceptional resistance to demagnetization from outside magnetic sources,
- In other words, due to the metallic nickel coating, the magnet obtains an aesthetic appearance,
- They have extremely strong magnetic induction on the surface of the magnet,
- With the right combination of magnetic alloys, they reach increased thermal stability, enabling operation at or above 230°C (depending on the design),
- With the option for fine forming and targeted design, these magnets can be produced in various shapes and sizes, greatly improving design adaptation,
- Significant impact in cutting-edge sectors – they serve a purpose in HDDs, electric motors, diagnostic apparatus along with other advanced devices,
- Thanks to their power density, small magnets offer high magnetic performance, in miniature format,
Disadvantages of magnetic elements:
- They are fragile when subjected to a sudden impact. If the magnets are exposed to shocks, it is advisable to use in a protective case. The steel housing, in the form of a holder, protects the magnet from cracks , and at the same time strengthens its overall resistance,
- They lose field intensity at high temperatures. Most neodymium magnets experience permanent degradation in strength when heated above 80°C (depending on the dimensions and height). However, we offer special variants with high temperature resistance that can operate up to 230°C or higher,
- They rust in a moist environment – during outdoor use, we recommend using sealed magnets, such as those made of non-metallic materials,
- Using a cover – such as a magnetic holder – is advised due to the difficulty in manufacturing threads directly in the magnet,
- Possible threat due to small fragments may arise, especially if swallowed, which is crucial in the family environments. Moreover, miniature parts from these assemblies may complicate medical imaging if inside the body,
- Higher purchase price is an important factor to consider compared to ceramic magnets, especially in budget-sensitive applications
Best holding force of the magnet in ideal parameters – what affects it?
The given lifting capacity of the magnet represents the maximum lifting force, measured in the best circumstances, specifically:
- with mild steel, used as a magnetic flux conductor
- having a thickness of no less than 10 millimeters
- with a refined outer layer
- in conditions of no clearance
- with vertical force applied
- at room temperature
Determinants of practical lifting force of a magnet
In practice, the holding capacity of a magnet is affected by these factors, arranged from the most important to the least relevant:
- Air gap between the magnet and the plate, as even a very small distance (e.g. 0.5 mm) causes a drop in lifting force of up to 50%.
- Direction of applied force, because the maximum lifting capacity is achieved under perpendicular application. The force required to slide the magnet along the plate is usually several times lower.
- Thickness of the plate, as a plate that is too thin causes part of the magnetic flux not to be used and to remain wasted in the air.
- Material of the plate, because higher carbon content lowers holding force, while higher iron content increases it. The best choice is steel with high magnetic permeability and high saturation induction.
- Surface of the plate, because the more smooth and polished it is, the better the contact and consequently the greater the magnetic saturation.
- Operating temperature, since all permanent magnets have a negative temperature coefficient. This means that at high temperatures they are weaker, while at sub-zero temperatures they become slightly stronger.
* Holding force was measured on the plate surface of 20 mm thickness, when a perpendicular force was applied, however under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a minimal clearance {between} the magnet’s surface and the plate reduces the load capacity.
Precautions with Neodymium Magnets
Magnets made of neodymium are incredibly fragile, they easily fall apart as well as can crumble.
Neodymium magnetic are delicate as well as will break if allowed to collide with each other, even from a distance of a few centimeters. Despite being made of metal as well as coated with a shiny nickel plating, they are not as hard as steel. At the moment of collision between the magnets, small sharp metal pieces can be propelled in various directions at high speed. Eye protection is recommended.
Neodymium magnets can demagnetize at high temperatures.
Although magnets are generally resilient, their ability to maintain their magnetic potency can be influenced by factors like the type of material used, the magnet's shape, and the intended purpose for which it is employed.
Dust and powder from neodymium magnets are flammable.
Do not attempt to drill into neodymium magnets. Mechanical processing is also not recommended. If the magnet is crushed into fine powder or dust, it becomes highly flammable.
Neodymium magnets can attract to each other, pinch the skin, and cause significant swellings.
Magnets will attract each other within a distance of several to around 10 cm from each other. Remember not to place fingers between magnets or alternatively in their path when they attract. Depending on how huge the neodymium magnets are, they can lead to a cut or alternatively a fracture.
People with pacemakers are advised to avoid neodymium magnets.
Neodymium magnets generate very strong magnetic fields that can interfere with the operation of a pacemaker. This is because many of these devices are equipped with a function that deactivates the device in a magnetic field.
Keep neodymium magnets away from TV, wallet, and computer HDD.
The strong magnetic field generated by neodymium magnets can damage magnetic media such as floppy disks, video tapes, HDDs, credit cards, magnetic ID cards, cassette tapes, or other devices. They can also damage devices like video players, televisions, CRT computer monitors. Remember not to place neodymium magnets close to these electronic devices.
Neodymium magnets are the most powerful magnets ever created, and their strength can surprise you.
To use magnets properly, it is best to familiarize yourself with our information beforehand. This will help you avoid significant harm to your body and the magnets themselves.
The magnet is coated with nickel - be careful if you have an allergy.
Studies show a small percentage of people have allergies to certain metals, including nickel. An allergic reaction often manifests as skin redness and rash. If you have a nickel allergy, you can try wearing gloves or simply avoid direct contact with nickel-plated neodymium magnets.
Keep neodymium magnets away from youngest children.
Remember that neodymium magnets are not toys. Be cautious and make sure no child plays with them. They can be a significant choking hazard. If multiple magnets are swallowed, they can attract to each other through the intestinal walls, causing severe injuries, and even death.
Do not bring neodymium magnets close to GPS and smartphones.
Magnetic fields can interfere with compasses and magnetometers used in aviation and maritime navigation, as well as internal compasses of smartphones and GPS devices. There are neodymium magnets in every smartphone, for example, in the microphone and speakers.
Safety rules!
So you are aware of why neodymium magnets are so dangerous, see the article titled How dangerous are very strong neodymium magnets?.
