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neodymium magnets

We provide red color magnetic Nd2Fe14B - our proposal. All "neodymium magnets" in our store are in stock 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 25x200 / N52 - magnetic separator with handle

magnetic separator with handle

Catalog no 140444

GTIN: 5906301813507

5

Diameter Ø [±0,1 mm]

25 mm

Height [±0,1 mm]

200 mm

Weight

0.01 g

553.50 with VAT / pcs + price for transport

450.00 ZŁ net + 23% VAT / pcs

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Lifting power along with shape of magnets can be checked using our power calculator.

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SMZR 25x200 / N52 - magnetic separator with handle
Specification/characteristics SMZR 25x200 / N52 - magnetic separator with handle
properties
values
Cat. no.
140444
GTIN
5906301813507
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
25 mm [±0,1 mm]
Height
200 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. 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.
A neodymium magnet attracts only ferromagnetic metals, such as ordinary steel (black) and cast iron. Lack of reaction (attraction) means the tested item is made of non-magnetic material.
The neodymium model offers powerful force with low weight, which drastically reduces hand fatigue. A lighter tool allows for longer work without wrist and arm pain. This is a modern solution displacing heavy and weak ferrite magnets.
The neodymium magnet is enclosed in a solid, metal housing (steel or brass). 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. 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.

Strengths as well as weaknesses of rare earth magnets.

Besides their immense magnetic power, neodymium magnets offer the following advantages:

  • They retain magnetic properties for almost 10 years – the drop is just ~1% (based on simulations),
  • Neodymium magnets remain highly resistant to demagnetization caused by external interference,
  • By using a decorative layer of silver, the element has an professional look,
  • Magnetic induction on the working part of the magnet turns out to be exceptional,
  • 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 freedom in forming and the capacity to customize to specific needs,
  • Key role in innovative solutions – they serve a role in magnetic memories, brushless drives, advanced medical instruments, and complex engineering applications.
  • Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,

Characteristics of disadvantages of neodymium magnets and ways of using them

  • At very strong impacts they can crack, therefore we advise placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
  • Neodymium magnets decrease 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 durability even at temperatures up to 230°C
  • Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
  • Limited ability of producing nuts in the magnet and complicated shapes - recommended is a housing - magnetic holder.
  • Potential hazard resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which is particularly important in the context of child safety. Additionally, small elements of these products are able to be problematic in diagnostics medical after entering the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Maximum lifting capacity of the magnetwhat contributes to it?

The specified lifting capacity represents the limit force, measured under laboratory conditions, specifically:

  • using a sheet made of high-permeability steel, serving as a ideal flux conductor
  • with a cross-section minimum 10 mm
  • with a plane free of scratches
  • without any insulating layer between the magnet and steel
  • under perpendicular application of breakaway force (90-degree angle)
  • in stable room temperature

Determinants of practical lifting force of a magnet

Holding efficiency is affected by specific conditions, including (from priority):

  • Clearance – the presence of foreign body (paint, tape, gap) interrupts the magnetic circuit, which reduces capacity steeply (even by 50% at 0.5 mm).
  • Loading method – catalog parameter refers to detachment vertically. When applying parallel force, the magnet exhibits significantly lower power (often approx. 20-30% of nominal force).
  • Base massiveness – too thin steel does not close the flux, causing part of the power to be wasted to the other side.
  • Material type – ideal substrate is high-permeability steel. Stainless steels may generate lower lifting capacity.
  • Surface condition – ground elements guarantee perfect abutment, which improves field saturation. Rough surfaces weaken the grip.
  • Operating temperature – NdFeB sinters have a sensitivity to temperature. At higher temperatures they are weaker, and in frost gain strength (up to a certain limit).

* Holding force was tested on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, however under attempts to slide the magnet the lifting capacity is smaller. In addition, even a small distance {between} the magnet’s surface and the plate lowers the load capacity.

Warnings

Metal Allergy

Certain individuals suffer from a contact allergy to nickel, which is the typical protective layer for NdFeB magnets. Frequent touching might lead to dermatitis. We recommend use safety gloves.

Warning for heart patients

Patients with a heart stimulator should maintain an absolute distance from magnets. The magnetic field can interfere with the operation of the life-saving device.

Handling rules

Handle magnets consciously. Their immense force can shock even professionals. Stay alert and do not underestimate their power.

Dust is flammable

Dust produced during grinding of magnets is combustible. Avoid drilling into magnets without proper cooling and knowledge.

Beware of splinters

Beware of splinters. Magnets can fracture upon violent connection, ejecting shards into the air. Wear goggles.

Safe distance

Data protection: Neodymium magnets can ruin data carriers and delicate electronics (pacemakers, hearing aids, mechanical watches).

GPS and phone interference

Note: neodymium magnets generate a field that disrupts sensitive sensors. Keep a safe distance from your phone, device, and GPS.

Operating temperature

Keep cool. NdFeB magnets are susceptible to heat. If you need operation above 80°C, ask us about HT versions (H, SH, UH).

Choking Hazard

Absolutely keep magnets away from children. Risk of swallowing is high, and the effects of magnets clamping inside the body are tragic.

Bodily injuries

Large magnets can break fingers instantly. Do not put your hand betwixt two attracting surfaces.

Caution!

Details 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