UMP 135x40 [M10+M12] GW F 600 kg / N38 - search holder
search holder
Catalog no 210339
GTIN: 5906301813989
Diameter Ø [±0,1 mm]
135 mm
Height [±0,1 mm]
40 mm
Weight
4300 g
Load capacity
680 kg / 6668.52 N
Coating
[NiCuNi] nickel
599.99 ZŁ with VAT / pcs + price for transport
487.80 ZŁ net + 23% VAT / pcs
bulk discounts:
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Magnetic properties of material N38
Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C
Shopping tips
Advantages as well as disadvantages of rare earth magnets.
Besides their magnetic performance, neodymium magnets are valued for these benefits:
- They have constant strength, and over nearly ten years their attraction force decreases symbolically – ~1% (according to theory),
- They do not lose their magnetic properties even under strong external field,
- By applying a lustrous coating of nickel, the element presents an elegant look,
- The surface of neodymium magnets generates a powerful magnetic field – this is a key feature,
- Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
- Thanks to flexibility in shaping and the ability to adapt to client solutions,
- Fundamental importance in modern technologies – they are commonly used in computer drives, motor assemblies, precision medical tools, as well as other advanced devices.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
Disadvantages of neodymium magnets:
- They are prone to damage upon heavy impacts. To avoid cracks, it is worth protecting magnets in a protective case. Such protection not only shields the magnet but also improves its resistance to damage
- When exposed to high temperature, neodymium magnets experience a drop in power. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
- They oxidize in a humid environment. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
- Due to limitations in realizing nuts and complex shapes in magnets, we recommend using cover - magnetic mechanism.
- Possible danger related to microscopic parts of magnets pose a threat, in case of ingestion, which becomes key in the context of child safety. Additionally, small elements of these magnets can complicate diagnosis medical when they are in the body.
- High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which can limit application in large quantities
Optimal lifting capacity of a neodymium magnet – what affects it?
Holding force of 680 kg is a theoretical maximum value conducted under the following configuration:
- on a base made of structural steel, effectively closing the magnetic field
- possessing a thickness of minimum 10 mm to ensure full flux closure
- with an polished contact surface
- with zero gap (without paint)
- under axial force direction (90-degree angle)
- at conditions approx. 20°C
Lifting capacity in real conditions – factors
In practice, the actual holding force results from a number of factors, listed from crucial:
- Air gap (between the magnet and the metal), since even a very small clearance (e.g. 0.5 mm) results in a decrease in lifting capacity by up to 50% (this also applies to paint, rust or debris).
- Pull-off angle – note that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the nominal value.
- Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal limits the attraction force (the magnet "punches through" it).
- Steel type – low-carbon steel attracts best. Alloy steels lower magnetic permeability and holding force.
- Smoothness – full contact is possible only on smooth steel. Any scratches and bumps reduce the real contact area, weakening the magnet.
- Temperature influence – hot environment reduces pulling force. Exceeding the limit temperature can permanently damage the magnet.
* Holding force was tested on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, however under attempts to slide the magnet the holding force is lower. Additionally, even a minimal clearance {between} the magnet’s surface and the plate lowers the load capacity.
Warnings
GPS and phone interference
A strong magnetic field disrupts the operation of compasses in phones and GPS navigation. Keep magnets near a device to avoid damaging the sensors.
Data carriers
Avoid bringing magnets close to a wallet, laptop, or screen. The magnetism can irreversibly ruin these devices and erase data from cards.
Serious injuries
Danger of trauma: The attraction force is so immense that it can cause blood blisters, pinching, and broken bones. Use thick gloves.
Heat sensitivity
Standard neodymium magnets (grade N) lose power when the temperature exceeds 80°C. The loss of strength is permanent.
Skin irritation risks
Allergy Notice: The Ni-Cu-Ni coating consists of nickel. If redness occurs, immediately stop handling magnets and use protective gear.
Fire warning
Machining of neodymium magnets carries a risk of fire risk. Magnetic powder reacts violently with oxygen and is hard to extinguish.
Powerful field
Use magnets with awareness. Their powerful strength can surprise even professionals. Plan your moves and respect their force.
Swallowing risk
Product intended for adults. Small elements pose a choking risk, leading to intestinal necrosis. Store out of reach of children and animals.
Beware of splinters
Beware of splinters. Magnets can fracture upon violent connection, ejecting sharp fragments into the air. Eye protection is mandatory.
Implant safety
For implant holders: Strong magnetic fields affect electronics. Keep minimum 30 cm distance or ask another person to work with the magnets.
Safety First!
Details about risks in the article: Magnet Safety Guide.
