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
Strengths as well as weaknesses of rare earth magnets.
Besides their exceptional magnetic power, neodymium magnets offer the following advantages:
- Their strength remains stable, and after approximately ten years it decreases only by ~1% (according to research),
- Neodymium magnets remain remarkably resistant to demagnetization caused by external field sources,
- The use of an elegant coating of noble metals (nickel, gold, silver) causes the element to have aesthetics,
- Magnets exhibit impressive magnetic induction on the working surface,
- Thanks to resistance to high temperature, they can operate (depending on the form) even at temperatures up to 230°C and higher...
- Thanks to modularity in constructing and the ability to customize to complex applications,
- Significant place in modern industrial fields – they are utilized in magnetic memories, drive modules, medical devices, and industrial machines.
- Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,
Disadvantages of NdFeB magnets:
- They are fragile upon too strong impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only protects the magnet but also increases its resistance to damage
- When exposed to high temperature, neodymium magnets experience a drop in force. 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 corrode. Therefore during using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture
- We recommend cover - magnetic mechanism, due to difficulties in producing threads inside the magnet and complicated forms.
- Potential hazard resulting from small fragments of magnets can be dangerous, if swallowed, which becomes key in the context of child safety. Furthermore, small elements of these products are able to disrupt the diagnostic process medical when they are in the body.
- High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which can limit application in large quantities
Magnetic strength at its maximum – what it depends on?
Magnet power is the result of a measurement for the most favorable conditions, assuming:
- using a plate made of mild steel, functioning as a circuit closing element
- possessing a thickness of at least 10 mm to avoid saturation
- with a plane perfectly flat
- with direct contact (without impurities)
- under vertical force vector (90-degree angle)
- in temp. approx. 20°C
Determinants of lifting force in real conditions
Effective lifting capacity is affected by working environment parameters, including (from priority):
- Gap between surfaces – every millimeter of separation (caused e.g. by veneer or unevenness) diminishes the pulling force, often by half at just 0.5 mm.
- Load vector – highest force is reached only during pulling at a 90° angle. The shear force of the magnet along the surface is typically many times lower (approx. 1/5 of the lifting capacity).
- Substrate thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
- Steel grade – the best choice is high-permeability steel. Cast iron may attract less.
- Surface condition – ground elements ensure maximum contact, which increases force. Rough surfaces reduce efficiency.
- Thermal environment – heating the magnet results in weakening of force. Check the maximum operating temperature for a given model.
* Lifting capacity testing was performed on a smooth plate of optimal thickness, under perpendicular forces, however under attempts to slide the magnet the load capacity is reduced by as much as 75%. In addition, even a small distance {between} the magnet’s surface and the plate lowers the holding force.
Precautions when working with neodymium magnets
Electronic devices
Very strong magnetic fields can destroy records on credit cards, hard drives, and other magnetic media. Keep a distance of at least 10 cm.
Danger to the youngest
NdFeB magnets are not intended for children. Accidental ingestion of a few magnets may result in them attracting across intestines, which constitutes a severe health hazard and necessitates immediate surgery.
Combustion hazard
Fire warning: Rare earth powder is highly flammable. Avoid machining magnets in home conditions as this may cause fire.
Powerful field
Exercise caution. Neodymium magnets act from a long distance and connect with massive power, often faster than you can react.
Heat sensitivity
Control the heat. Exposing the magnet above 80 degrees Celsius will permanently weaken its magnetic structure and pulling force.
Finger safety
Watch your fingers. Two large magnets will snap together instantly with a force of massive weight, destroying everything in their path. Be careful!
Compass and GPS
Note: rare earth magnets produce a field that interferes with precision electronics. Maintain a safe distance from your mobile, tablet, and navigation systems.
Allergic reactions
Allergy Notice: The nickel-copper-nickel coating consists of nickel. If skin irritation occurs, immediately stop handling magnets and use protective gear.
Fragile material
NdFeB magnets are ceramic materials, meaning they are fragile like glass. Impact of two magnets will cause them shattering into shards.
Pacemakers
People with a heart stimulator have to maintain an large gap from magnets. The magnetic field can disrupt the functioning of the implant.
Safety First!
More info about risks in the article: Safety of working with magnets.
