SMZR 25x175 / N52 - magnetic separator with handle
magnetic separator with handle
Catalog no 140443
GTIN: 5906301813491
Diameter Ø [±0,1 mm]
25 mm
Height [±0,1 mm]
175 mm
Weight
0.01 g
492.00 ZŁ with VAT / pcs + price for transport
400.00 ZŁ net + 23% VAT / pcs
bulk discounts:
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Magnetic properties of material N52
Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C
Shopping tips
Pros as well as cons of neodymium magnets.
In addition to their pulling strength, neodymium magnets provide the following advantages:
- They have stable power, and over more than ten years their performance decreases symbolically – ~1% (in testing),
- Neodymium magnets are exceptionally resistant to demagnetization caused by external interference,
- In other words, due to the aesthetic surface of silver, the element is aesthetically pleasing,
- The surface of neodymium magnets generates a strong magnetic field – this is a key feature,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
- Thanks to flexibility in designing and the ability to adapt to individual projects,
- Significant place in electronics industry – they are utilized in magnetic memories, electromotive mechanisms, medical devices, also industrial machines.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which allows their use in miniature devices
Cons of neodymium magnets and proposals for their use:
- To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution secures the magnet and simultaneously improves its durability.
- Neodymium magnets lose their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
- They oxidize in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
- Due to limitations in producing nuts and complicated forms in magnets, we propose using a housing - magnetic holder.
- Potential hazard resulting from small fragments of magnets are risky, if swallowed, which is particularly important in the context of child safety. Furthermore, small components of these products are able to be problematic in diagnostics medical in case of swallowing.
- Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications
Magnetic strength at its maximum – what contributes to it?
Magnet power was determined for ideal contact conditions, including:
- on a plate made of structural steel, perfectly concentrating the magnetic flux
- whose transverse dimension equals approx. 10 mm
- with an polished contact surface
- under conditions of no distance (surface-to-surface)
- under perpendicular application of breakaway force (90-degree angle)
- at conditions approx. 20°C
What influences lifting capacity in practice
Bear in mind that the application force will differ influenced by elements below, starting with the most relevant:
- Distance – the presence of foreign body (rust, tape, air) interrupts the magnetic circuit, which lowers power steeply (even by 50% at 0.5 mm).
- Load vector – highest force is obtained only during perpendicular pulling. The force required to slide of the magnet along the plate is usually several times smaller (approx. 1/5 of the lifting capacity).
- Element thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
- Metal type – different alloys attracts identically. High carbon content weaken the interaction with the magnet.
- Surface condition – smooth surfaces ensure maximum contact, which increases field saturation. Uneven metal weaken the grip.
- Heat – NdFeB sinters have a sensitivity to temperature. When it is hot they lose power, and in frost gain strength (up to a certain limit).
* Holding force was tested on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, whereas under parallel forces the load capacity is reduced by as much as 75%. In addition, even a slight gap {between} the magnet and the plate decreases the lifting capacity.
Precautions when working with NdFeB magnets
Do not give to children
NdFeB magnets are not suitable for play. Swallowing multiple magnets can lead to them connecting inside the digestive tract, which constitutes a direct threat to life and necessitates immediate surgery.
Dust is flammable
Mechanical processing of neodymium magnets carries a risk of fire hazard. Neodymium dust reacts violently with oxygen and is difficult to extinguish.
Finger safety
Large magnets can break fingers instantly. Do not put your hand betwixt two strong magnets.
Heat sensitivity
Regular neodymium magnets (N-type) undergo demagnetization when the temperature goes above 80°C. This process is irreversible.
Protective goggles
Neodymium magnets are ceramic materials, which means they are fragile like glass. Collision of two magnets will cause them cracking into shards.
Electronic hazard
Equipment safety: Neodymium magnets can ruin payment cards and sensitive devices (heart implants, hearing aids, mechanical watches).
Danger to pacemakers
Patients with a heart stimulator should keep an safe separation from magnets. The magnetic field can stop the operation of the life-saving device.
Allergy Warning
Some people suffer from a contact allergy to nickel, which is the common plating for neodymium magnets. Prolonged contact might lead to a rash. It is best to use safety gloves.
Phone sensors
A strong magnetic field negatively affects the operation of compasses in phones and GPS navigation. Maintain magnets close to a device to prevent breaking the sensors.
Handling guide
Before use, read the rules. Sudden snapping can destroy the magnet or hurt your hand. Think ahead.
Danger!
Want to know more? Read our article: Are neodymium magnets dangerous?
