SM 25x150 [2xM8] / N42 - magnetic separator
magnetic separator
Catalog no 130289
GTIN: 5906301812821
Diameter Ø
25 mm [±1 mm]
Height
150 mm [±1 mm]
Weight
0.01 g
Magnetic Flux
~ 6 500 Gauss [±5%]
393.60 ZŁ with VAT / pcs + price for transport
320.00 ZŁ net + 23% VAT / pcs
bulk discounts:
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Magnetic properties of material N42
Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C
Shopping tips
Pros as well as cons of rare earth magnets.
Besides their tremendous strength, neodymium magnets offer the following advantages:
- They do not lose strength, even during around 10 years – the drop in lifting capacity is only ~1% (according to tests),
- They do not lose their magnetic properties even under strong external field,
- In other words, due to the reflective finish of silver, the element gains visual value,
- The surface of neodymium magnets generates a intense magnetic field – this is a key feature,
- Through (appropriate) combination of ingredients, they can achieve high thermal strength, enabling functioning at temperatures reaching 230°C and above...
- Thanks to the potential of precise forming and customization to unique projects, NdFeB magnets can be produced in a wide range of shapes and sizes, which amplifies use scope,
- Versatile presence in future technologies – they find application in mass storage devices, brushless drives, diagnostic systems, and complex engineering applications.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which makes them useful in small systems
Disadvantages of NdFeB magnets:
- Brittleness is one of their disadvantages. Upon strong impact they can break. We recommend keeping them in a steel housing, which not only secures them against impacts but also increases their durability
- When exposed to high temperature, neodymium magnets suffer a drop in power. Often, when the temperature exceeds 80°C, their power 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
- Magnets exposed to a humid environment can rust. Therefore while using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material protecting against moisture
- Limited possibility of producing nuts in the magnet and complicated forms - recommended is a housing - mounting mechanism.
- Potential hazard resulting from small fragments of magnets pose a threat, if swallowed, which gains importance in the context of child safety. Furthermore, small elements of these magnets can disrupt the diagnostic process medical after entering the body.
- High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which hinders application in large quantities
Highest magnetic holding force – what it depends on?
Breakaway force was defined for the most favorable conditions, including:
- using a base made of low-carbon steel, acting as a magnetic yoke
- with a thickness minimum 10 mm
- with a plane cleaned and smooth
- under conditions of no distance (metal-to-metal)
- under perpendicular force direction (90-degree angle)
- in neutral thermal conditions
Magnet lifting force in use – key factors
During everyday use, the actual lifting capacity is determined by a number of factors, ranked from most significant:
- Distance – existence of foreign body (rust, tape, gap) interrupts the magnetic circuit, which lowers power rapidly (even by 50% at 0.5 mm).
- Loading method – catalog parameter refers to detachment vertically. When applying parallel force, the magnet exhibits much less (typically approx. 20-30% of maximum force).
- Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field passes through the material instead of generating force.
- Steel grade – the best choice is high-permeability steel. Cast iron may generate lower lifting capacity.
- Surface condition – ground elements ensure maximum contact, which increases field saturation. Uneven metal weaken the grip.
- Temperature influence – high temperature reduces pulling force. Too high temperature can permanently demagnetize the magnet.
* Lifting capacity testing was conducted on a smooth plate of suitable thickness, under a perpendicular pulling force, in contrast under parallel forces the load capacity is reduced by as much as 5 times. Moreover, even a minimal clearance {between} the magnet and the plate decreases the lifting capacity.
Precautions when working with neodymium magnets
Beware of splinters
NdFeB magnets are ceramic materials, which means they are very brittle. Collision of two magnets leads to them breaking into shards.
Hand protection
Watch your fingers. Two powerful magnets will snap together immediately with a force of several hundred kilograms, crushing everything in their path. Exercise extreme caution!
Threat to electronics
Avoid bringing magnets near a wallet, computer, or TV. The magnetism can permanently damage these devices and erase data from cards.
Handling rules
Use magnets with awareness. Their huge power can surprise even professionals. Stay alert and respect their force.
Warning for allergy sufferers
Studies show that the nickel plating (standard magnet coating) is a strong allergen. If you have an allergy, refrain from touching magnets with bare hands and choose coated magnets.
Fire warning
Powder created during cutting of magnets is combustible. Do not drill into magnets unless you are an expert.
Danger to the youngest
Always keep magnets out of reach of children. Risk of swallowing is high, and the consequences of magnets clamping inside the body are tragic.
Health Danger
People with a pacemaker should maintain an absolute distance from magnets. The magnetic field can interfere with the operation of the life-saving device.
Heat warning
Standard neodymium magnets (grade N) lose power when the temperature goes above 80°C. The loss of strength is permanent.
Impact on smartphones
An intense magnetic field interferes with the functioning of magnetometers in phones and navigation systems. Maintain magnets near a smartphone to avoid damaging the sensors.
Danger!
Want to know more? Read our article: Why are neodymium magnets dangerous?
