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neodymium magnets

We provide red color magnetic Nd2Fe14B - our offer. All "neodymium magnets" in our store are available for immediate delivery (check the list). Check out the magnet price list for more details see the magnet price list

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SMZR 25x150 / N52 - magnetic separator with handle

magnetic separator with handle

Catalog no 140234

GTIN: 5906301813422

5

Diameter Ø [±0,1 mm]

25 mm

Height [±0,1 mm]

150 mm

Weight

0.01 g

430.50 with VAT / pcs + price for transport

350.00 ZŁ net + 23% VAT / pcs

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Strength along with appearance of neodymium magnets can be tested on our online calculation tool.

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SMZR 25x150 / N52 - magnetic separator with handle
Specification/characteristics SMZR 25x150 / N52 - magnetic separator with handle
properties
values
Cat. no.
140234
GTIN
5906301813422
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
25 mm [±0,1 mm]
Height
150 mm [±0,1 mm]
Weight
0.01 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

It is an essential at every scrap yard, waste sorting plant, and workshop. It enables effective segregation of materials in the yard and accepting goods. It is also useful for pulling small steel elements from crates, ash, sand, or sawdust.
The tool reacts to carbon steel but does not attract most stainless steels (austenitic, like AISI 304). If the magnet does not attract the tested element, it is probably non-ferrous metal or acid-resistant steel.
Neodymiums are more compact and effective during all-day work at a scrap yard. 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. A solid handle (wooden, rubber, or plastic) ensures a firm and comfortable grip. The tool is durable, drop-resistant, and prepared for hard work.
Standard manual separators (such as SMZR 25x150 / N52) do not have a release mechanism and require manual cleaning. We also offer versions where pulling the handle automatically drops collected material. In the case of strong magnets, it is easiest to slide the metal to the side of the housing instead of tearing it straight off.

Advantages and disadvantages of NdFeB magnets.

Besides their durability, neodymium magnets are valued for these benefits:

  • They have stable power, and over nearly ten years their attraction force decreases symbolically – ~1% (according to theory),
  • They are resistant to demagnetization induced by external field influence,
  • By applying a smooth layer of silver, the element acquires an nice look,
  • Neodymium magnets ensure maximum magnetic induction on a their surface, which increases force concentration,
  • 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...
  • Considering the potential of flexible molding and adaptation to custom needs, neodymium magnets can be created in a broad palette of forms and dimensions, which expands the range of possible applications,
  • Versatile presence in modern technologies – they find application in magnetic memories, electric drive systems, medical equipment, also complex engineering applications.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which enables their usage in compact constructions

Drawbacks and weaknesses of neodymium magnets: tips and applications.

  • At strong impacts they can crack, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage and increases the magnet's durability.
  • We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 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.
  • We suggest cover - magnetic mechanism, due to difficulties in producing nuts inside the magnet and complicated forms.
  • Possible danger resulting from small fragments of magnets can be dangerous, if swallowed, which becomes key in the context of child health protection. It is also worth noting that small components of these magnets can complicate diagnosis medical when they are in the body.
  • High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Detachment force of the magnet in optimal conditionswhat contributes to it?

Information about lifting capacity is the result of a measurement for the most favorable conditions, including:

  • with the application of a sheet made of special test steel, ensuring maximum field concentration
  • possessing a massiveness of minimum 10 mm to ensure full flux closure
  • with a surface perfectly flat
  • without any air gap between the magnet and steel
  • for force applied at a right angle (pull-off, not shear)
  • at ambient temperature approx. 20 degrees Celsius

Determinants of practical lifting force of a magnet

Please note that the working load will differ depending on elements below, starting with the most relevant:

  • Distance – the presence of any layer (paint, dirt, gap) acts as an insulator, which lowers capacity rapidly (even by 50% at 0.5 mm).
  • Direction of force – highest force is obtained only during pulling at a 90° angle. The resistance to sliding of the magnet along the surface is standardly several times lower (approx. 1/5 of the lifting capacity).
  • Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of converting into lifting capacity.
  • Steel grade – ideal substrate is pure iron steel. Stainless steels may generate lower lifting capacity.
  • Surface quality – the smoother and more polished the surface, the better the adhesion and stronger the hold. Unevenness acts like micro-gaps.
  • Operating temperature – NdFeB sinters have a negative temperature coefficient. When it is hot they lose power, and in frost gain strength (up to a certain limit).

* Lifting capacity was measured using a steel plate with a smooth surface of optimal thickness (min. 20 mm), under perpendicular detachment force, in contrast under attempts to slide the magnet the load capacity is reduced by as much as 5 times. In addition, even a minimal clearance {between} the magnet and the plate reduces the holding force.

Safe handling of neodymium magnets

Bodily injuries

Large magnets can crush fingers in a fraction of a second. Do not place your hand between two attracting surfaces.

Combustion hazard

Powder created during cutting of magnets is flammable. Do not drill into magnets unless you are an expert.

Risk of cracking

Watch out for shards. Magnets can fracture upon uncontrolled impact, ejecting sharp fragments into the air. Eye protection is mandatory.

GPS and phone interference

An intense magnetic field negatively affects the functioning of magnetometers in phones and GPS navigation. Keep magnets close to a device to prevent breaking the sensors.

Protect data

Equipment safety: Strong magnets can damage payment cards and delicate electronics (pacemakers, hearing aids, timepieces).

Operating temperature

Standard neodymium magnets (N-type) lose power when the temperature surpasses 80°C. Damage is permanent.

No play value

Only for adults. Small elements pose a choking risk, causing intestinal necrosis. Keep out of reach of children and animals.

Handling rules

Handle with care. Neodymium magnets attract from a distance and connect with massive power, often quicker than you can react.

Medical implants

Individuals with a pacemaker must keep an safe separation from magnets. The magnetism can stop the functioning of the implant.

Avoid contact if allergic

Warning for allergy sufferers: The nickel-copper-nickel coating consists of nickel. If redness happens, immediately stop handling magnets and use protective gear.

Safety First!

Learn more about risks in the article: Safety of working with magnets.

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98