MPL 40x18x10 SH / N38 - lamellar magnet
lamellar magnet
Catalog no 020157
GTIN: 5906301811633
length
40 mm [±0,1 mm]
Width
18 mm [±0,1 mm]
Height
10 mm [±0,1 mm]
Weight
54 g
Magnetization Direction
↑ axial
Magnetic Induction
366.66 mT
Coating
[NiCuNi] nickel
36.29 ZŁ with VAT / pcs + price for transport
29.50 ZŁ net + 23% VAT / pcs
27.50 ZŁ net was the lowest price in the last 30 days
bulk discounts:
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Magnetic properties of material N38
Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C
Shopping tips
Strengths and weaknesses of NdFeB magnets.
Apart from their notable magnetism, neodymium magnets have these key benefits:
- They retain magnetic properties for around 10 years – the drop is just ~1% (according to analyses),
- Neodymium magnets remain extremely resistant to magnetic field loss caused by external magnetic fields,
- Thanks to the metallic finish, the layer of nickel, gold, or silver-plated gives an aesthetic appearance,
- Magnetic induction on the working part of the magnet is extremely intense,
- Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
- Thanks to modularity in constructing and the capacity to modify to specific needs,
- Versatile presence in innovative solutions – they find application in hard drives, motor assemblies, medical equipment, also technologically advanced constructions.
- Compactness – despite small sizes they provide effective action, making them ideal for precision applications
Disadvantages of neodymium magnets:
- Susceptibility to cracking is one of their disadvantages. Upon strong impact they can break. We recommend keeping them in a strong case, which not only protects them against impacts but also raises their durability
- Neodymium magnets lose force when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (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
- Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material stable to moisture, when using outdoors
- Due to limitations in realizing threads and complex forms in magnets, we propose using a housing - magnetic mount.
- Potential hazard resulting from small fragments of magnets can be dangerous, in case of ingestion, which is particularly important in the aspect of protecting the youngest. Additionally, small components of these products are able to be problematic in diagnostics medical when they are in the body.
- Due to expensive raw materials, their price is higher than average,
Detachment force of the magnet in optimal conditions – what contributes to it?
The force parameter is a theoretical maximum value executed under standard conditions:
- on a plate made of mild steel, perfectly concentrating the magnetic field
- whose transverse dimension equals approx. 10 mm
- characterized by even structure
- under conditions of no distance (metal-to-metal)
- during pulling in a direction vertical to the mounting surface
- at room temperature
Key elements affecting lifting force
Please note that the application force may be lower depending on the following factors, in order of importance:
- Clearance – existence of foreign body (paint, tape, air) acts as an insulator, which reduces capacity steeply (even by 50% at 0.5 mm).
- Load vector – highest force is obtained only during perpendicular pulling. The shear force of the magnet along the plate is standardly several times lower (approx. 1/5 of the lifting capacity).
- Plate thickness – insufficiently thick plate does not accept the full field, causing part of the flux to be wasted into the air.
- Steel type – low-carbon steel gives the best results. Higher carbon content reduce magnetic permeability and holding force.
- Surface quality – the more even the surface, the better the adhesion and higher the lifting capacity. Roughness creates an air distance.
- Thermal factor – high temperature reduces magnetic field. Exceeding the limit temperature can permanently damage the magnet.
* Lifting capacity was determined with the use of a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular detachment force, however under parallel forces the load capacity is reduced by as much as fivefold. Moreover, even a slight gap {between} the magnet and the plate lowers the lifting capacity.
Warnings
Impact on smartphones
Navigation devices and smartphones are extremely susceptible to magnetism. Direct contact with a strong magnet can permanently damage the internal compass in your phone.
Serious injuries
Big blocks can crush fingers instantly. Under no circumstances put your hand between two attracting surfaces.
No play value
Strictly keep magnets out of reach of children. Ingestion danger is high, and the consequences of magnets connecting inside the body are fatal.
Implant safety
Individuals with a ICD have to keep an large gap from magnets. The magnetism can disrupt the functioning of the life-saving device.
Shattering risk
Neodymium magnets are sintered ceramics, which means they are very brittle. Impact of two magnets will cause them breaking into shards.
Do not overheat magnets
Monitor thermal conditions. Heating the magnet above 80 degrees Celsius will permanently weaken its magnetic structure and pulling force.
Nickel coating and allergies
It is widely known that nickel (standard magnet coating) is a strong allergen. For allergy sufferers, refrain from touching magnets with bare hands and opt for coated magnets.
Electronic hazard
Data protection: Strong magnets can ruin payment cards and sensitive devices (pacemakers, hearing aids, timepieces).
Do not drill into magnets
Powder produced during cutting of magnets is combustible. Do not drill into magnets unless you are an expert.
Safe operation
Before starting, check safety instructions. Uncontrolled attraction can break the magnet or injure your hand. Think ahead.
Attention!
Need more info? Check our post: Are neodymium magnets dangerous?
