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neodymium magnets

We provide yellow color magnetic Nd2Fe14B - our proposal. All "neodymium magnets" on our website are available for immediate delivery (see the list). Check out the magnet pricing for more details see the magnet price list

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SMZR 32x125 / N52 - magnetic separator with handle

magnetic separator with handle

Catalog no 140238

GTIN: 5906301813460

5

Diameter Ø [±0,1 mm]

32 mm

Height [±0,1 mm]

125 mm

Weight

690 g

430.50 with VAT / pcs + price for transport

350.00 ZŁ net + 23% VAT / pcs

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SMZR 32x125 / N52 - magnetic separator with handle
Specification/characteristics SMZR 32x125 / N52 - magnetic separator with handle
properties
values
Cat. no.
140238
GTIN
5906301813460
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
32 mm [±0,1 mm]
Height
125 mm [±0,1 mm]
Weight
690 g [±0,1 mm]
Manufacturing Tolerance
± 0.1 mm

Magnetic properties of material N52

properties
values
units
remenance Br [Min. - Max.] ?
14.2-14.7
kGs
remenance Br [Min. - Max.] ?
1420-1470
T
coercivity bHc ?
10.8-12.5
kOe
coercivity bHc ?
860-995
kA/m
actual internal force iHc
≥ 12
kOe
actual internal force iHc
≥ 955
kA/m
energy density [Min. - Max.] ?
48-53
BH max MGOe
energy density [Min. - Max.] ?
380-422
BH max KJ/m
max. temperature ?
≤ 80
°C

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

properties
values
units
Vickers hardness
≥550
Hv
Density
≥7.4
g/cm3
Curie Temperature TC
312 - 380
°C
Curie Temperature TF
593 - 716
°F
Specific resistance
150
μΩ⋅Cm
Bending strength
250
Mpa
Compressive strength
1000~1100
Mpa
Thermal expansion parallel (∥) to orientation (M)
(3-4) x 106
°C-1
Thermal expansion perpendicular (⊥) to orientation (M)
-(1-3) x 10-6
°C-1
Young's modulus
1.7 x 104
kg/mm²

Shopping tips

This gripper serves for instant distinction of steel (iron) from non-ferrous metals. Thanks to it, you can easily and quickly assess the value of scrap and avoid mistakes. It can be used to collect scattered nails and screws from hard-to-reach places.
The magnet "catches" iron but remains completely indifferent to aluminum, copper, brass, and zinc. Lack of reaction (attraction) means the tested item is made of non-magnetic material.
Neodymium separators are much lighter and many times stronger than traditional ferrite ones. Thanks to this, work is more comfortable, and detection faster and more certain. This is a modern solution displacing heavy and weak ferrite magnets.
The construction consists of a hermetic can protecting the magnet and an ergonomic handle. A solid handle (wooden, rubber, or plastic) ensures a firm and comfortable grip. Thanks to such an armored build, the separator is resistant to difficult conditions prevailing at a scrap yard.
It is a simple and reliable construction without moving parts, so cleaning consists of removing scrap. Models with a release lever (so-called grippers with a dropper) are also available in another category. The sliding technique is more effective and requires less force than perpendicular tearing.

Strengths as well as weaknesses of rare earth magnets.

Besides their high retention, neodymium magnets are valued for these benefits:

  • Their strength is durable, and after around 10 years it decreases only by ~1% (according to research),
  • They have excellent resistance to magnetic field loss due to opposing magnetic fields,
  • By applying a lustrous coating of gold, the element acquires an elegant look,
  • Neodymium magnets generate maximum magnetic induction on a their surface, which ensures high operational effectiveness,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Thanks to the potential of accurate molding and adaptation to specialized requirements, neodymium magnets can be created in a variety of forms and dimensions, which makes them more universal,
  • Wide application in advanced technology sectors – they are used in magnetic memories, electromotive mechanisms, precision medical tools, as well as multitasking production systems.
  • Thanks to their power density, small magnets offer high operating force, in miniature format,

Cons of neodymium magnets: application proposals

  • Susceptibility to cracking is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a steel housing, which not only secures them against impacts but also increases their durability
  • NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
  • When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation and corrosion.
  • We suggest casing - magnetic mechanism, due to difficulties in producing threads inside the magnet and complicated shapes.
  • Health risk to health – tiny shards of magnets are risky, in case of ingestion, which becomes key in the aspect of protecting the youngest. It is also worth noting that tiny parts of these products can disrupt the diagnostic process medical after entering the body.
  • With budget limitations the cost of neodymium magnets can be a barrier,

Maximum lifting force for a neodymium magnet – what contributes to it?

The specified lifting capacity represents the peak performance, recorded under optimal environment, namely:

  • using a plate made of low-carbon steel, serving as a circuit closing element
  • whose thickness is min. 10 mm
  • characterized by smoothness
  • under conditions of no distance (metal-to-metal)
  • under perpendicular force vector (90-degree angle)
  • in neutral thermal conditions

What influences lifting capacity in practice

Effective lifting capacity impacted by specific conditions, including (from most important):

  • Distance (betwixt the magnet and the plate), because even a tiny distance (e.g. 0.5 mm) can cause a decrease in lifting capacity by up to 50% (this also applies to paint, rust or debris).
  • Pull-off angle – note that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the maximum value.
  • Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
  • Steel grade – the best choice is pure iron steel. Hardened steels may have worse magnetic properties.
  • Base smoothness – the more even the plate, the better the adhesion and higher the lifting capacity. Roughness acts like micro-gaps.
  • Operating temperature – neodymium magnets have a sensitivity to temperature. At higher temperatures they lose power, and in frost they can be stronger (up to a certain limit).

* Holding force was measured on the plate surface of 20 mm thickness, when the force acted perpendicularly, in contrast under shearing force the lifting capacity is smaller. Moreover, even a small distance {between} the magnet’s surface and the plate reduces the holding force.

H&S for magnets

Demagnetization risk

Monitor thermal conditions. Exposing the magnet above 80 degrees Celsius will permanently weaken its properties and pulling force.

Choking Hazard

Neodymium magnets are not toys. Swallowing a few magnets can lead to them attracting across intestines, which poses a critical condition and requires urgent medical intervention.

Dust explosion hazard

Dust generated during machining of magnets is flammable. Do not drill into magnets unless you are an expert.

Serious injuries

Watch your fingers. Two large magnets will join immediately with a force of several hundred kilograms, crushing everything in their path. Exercise extreme caution!

Fragile material

Despite the nickel coating, neodymium is delicate and not impact-resistant. Avoid impacts, as the magnet may shatter into hazardous fragments.

Handling rules

Before starting, read the rules. Uncontrolled attraction can destroy the magnet or injure your hand. Think ahead.

Metal Allergy

Allergy Notice: The Ni-Cu-Ni coating consists of nickel. If an allergic reaction appears, cease handling magnets and use protective gear.

Magnetic media

Very strong magnetic fields can erase data on payment cards, hard drives, and storage devices. Maintain a gap of at least 10 cm.

GPS Danger

Remember: rare earth magnets produce a field that disrupts precision electronics. Maintain a safe distance from your phone, device, and GPS.

Implant safety

Life threat: Neodymium magnets can deactivate pacemakers and defibrillators. Stay away if you have medical devices.

Warning!

Need more info? Check our post: Are neodymium magnets dangerous?

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98