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neodymium magnets

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SMZR 32x200 / N52 - magnetic separator with handle

magnetic separator with handle

Catalog no 140240

GTIN: 5906301813484

5

Diameter Ø [±0,1 mm]

32 mm

Height [±0,1 mm]

200 mm

Weight

1210 g

615.00 with VAT / pcs + price for transport

500.00 ZŁ net + 23% VAT / pcs

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SMZR 32x200 / N52 - magnetic separator with handle
Specification/characteristics SMZR 32x200 / N52 - magnetic separator with handle
properties
values
Cat. no.
140240
GTIN
5906301813484
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
32 mm [±0,1 mm]
Height
200 mm [±0,1 mm]
Weight
1210 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

A manual separator is a basic tool for quick identification and sorting of metals. It allows checking if a given item is ferromagnetic (steel, cast iron) or not (aluminum, copper, stainless steel). 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. The neodymium version is currently the standard in professional scrap yards.
The construction consists of a hermetic can protecting the magnet and an ergonomic handle. Tool ergonomics are key with frequent use by employees. 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. If you are looking for automatic dropping, ask about models with a magnetic release system. The sliding technique is more effective and requires less force than perpendicular tearing.

Strengths and weaknesses of rare earth magnets.

Besides their exceptional pulling force, neodymium magnets offer the following advantages:

  • They retain full power for around ten years – the loss is just ~1% (in theory),
  • They show high resistance to demagnetization induced by external magnetic fields,
  • By covering with a decorative layer of silver, the element acquires an professional look,
  • They are known for high magnetic induction at the operating surface, which affects their effectiveness,
  • Thanks to resistance to high temperature, they are able to function (depending on the shape) even at temperatures up to 230°C and higher...
  • Thanks to flexibility in designing and the capacity to customize to unusual requirements,
  • Huge importance in innovative solutions – they are used in magnetic memories, motor assemblies, advanced medical instruments, also complex engineering applications.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Problematic aspects of neodymium magnets: application proposals

  • Brittleness is one of their disadvantages. Upon strong impact they can fracture. We recommend keeping them in a strong case, which not only protects them against impacts but also raises their durability
  • Neodymium magnets decrease their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
  • When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation as well as corrosion.
  • Limited possibility of making nuts in the magnet and complicated forms - recommended is a housing - magnetic holder.
  • Possible danger to health – tiny shards of magnets can be dangerous, if swallowed, which becomes key in the context of child safety. It is also worth noting that small elements of these magnets are able to be problematic in diagnostics medical after entering the body.
  • With budget limitations the cost of neodymium magnets is a challenge,

Best holding force of the magnet in ideal parameterswhat it depends on?

Holding force of 0 kg is a measurement result performed under standard conditions:

  • using a sheet made of low-carbon steel, serving as a circuit closing element
  • possessing a massiveness of minimum 10 mm to avoid saturation
  • with an ideally smooth contact surface
  • under conditions of gap-free contact (metal-to-metal)
  • for force acting at a right angle (pull-off, not shear)
  • at ambient temperature approx. 20 degrees Celsius

Key elements affecting lifting force

During everyday use, the actual holding force results from a number of factors, presented from crucial:

  • Gap between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by varnish or unevenness) diminishes the pulling force, often by half at just 0.5 mm.
  • Angle of force application – maximum parameter is reached only during pulling at a 90° angle. The shear force of the magnet along the plate is typically many times smaller (approx. 1/5 of the lifting capacity).
  • Substrate thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
  • Plate material – mild steel attracts best. Alloy steels decrease magnetic properties and holding force.
  • Plate texture – ground elements ensure maximum contact, which improves force. Rough surfaces reduce efficiency.
  • Thermal conditions – neodymium magnets have a sensitivity to temperature. At higher temperatures they lose power, and in frost gain strength (up to a certain limit).

* Lifting capacity testing was performed on plates with a smooth surface of optimal thickness, under perpendicular forces, however under parallel forces the holding force is lower. Moreover, even a minimal clearance {between} the magnet’s surface and the plate decreases the load capacity.

Warnings

Bodily injuries

Big blocks can break fingers in a fraction of a second. Never place your hand betwixt two strong magnets.

Magnets are brittle

Watch out for shards. Magnets can explode upon violent connection, ejecting shards into the air. We recommend safety glasses.

Dust explosion hazard

Drilling and cutting of NdFeB material carries a risk of fire risk. Neodymium dust reacts violently with oxygen and is difficult to extinguish.

Medical implants

Warning for patients: Powerful magnets disrupt medical devices. Keep at least 30 cm distance or ask another person to work with the magnets.

Handling guide

Handle with care. Rare earth magnets attract from a distance and snap with huge force, often quicker than you can react.

Do not give to children

Neodymium magnets are not intended for children. Swallowing a few magnets can lead to them attracting across intestines, which poses a direct threat to life and necessitates urgent medical intervention.

Safe distance

Equipment safety: Neodymium magnets can ruin payment cards and sensitive devices (pacemakers, medical aids, mechanical watches).

Warning for allergy sufferers

Certain individuals have a sensitization to Ni, which is the standard coating for NdFeB magnets. Extended handling might lead to dermatitis. It is best to wear safety gloves.

Precision electronics

A strong magnetic field interferes with the operation of compasses in phones and navigation systems. Do not bring magnets near a device to avoid damaging the sensors.

Heat sensitivity

Monitor thermal conditions. Heating the magnet above 80 degrees Celsius will ruin its properties and pulling force.

Attention!

Learn more about risks in the article: Magnet Safety Guide.

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98