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neodymium magnets

We offer yellow color magnetic Nd2Fe14B - our store's offer. Practically all magnesy neodymowe in our store 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 25x200 / N52 - magnetic separator with handle

magnetic separator with handle

Catalog no 140444

GTIN: 5906301813507

5

Diameter Ø

25 mm [±1 mm]

Height

200 mm [±1 mm]

Weight

0.01 g

Magnetic Flux

~ 9 500 Gauss [±5%]

553.50 with VAT / pcs + price for transport

450.00 ZŁ net + 23% VAT / pcs

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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 [±1 mm]
Height
200 mm [±1 mm]
Weight
0.01 g
Material Type
Stainless steel AISI 304 / A2
Magnetic Flux
~ 9 500 Gauss [±5%]
Size/Mount Quantity
2xM8
Polarity
circumferential - 7 poles
Casing Tube Thickness
1 mm
Manufacturing Tolerance
±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 is also useful for pulling small steel elements from crates, ash, sand, or sawdust.
A neodymium magnet attracts only ferromagnetic metals, such as ordinary steel (black) and cast iron. 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. Strong neodymium field detects even weakly magnetic alloys and contaminants. 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.
In this model, collected metal must be torn off manually (preferably in a work glove). 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.

Pros and cons of rare earth magnets.

Besides their magnetic performance, neodymium magnets are valued for these benefits:

  • Their power is durable, and after approximately ten years it drops only by ~1% (according to research),
  • They do not lose their magnetic properties even under strong external field,
  • A magnet with a smooth silver surface looks better,
  • Magnetic induction on the surface of the magnet remains exceptional,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Thanks to versatility in constructing and the ability to customize to complex applications,
  • Key role in innovative solutions – they are utilized in hard drives, brushless drives, medical equipment, and complex engineering applications.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Cons of neodymium magnets: application proposals

  • At strong impacts they can break, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
  • They rust in a humid environment. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • Limited ability of producing threads in the magnet and complicated forms - recommended is a housing - mounting mechanism.
  • Health risk related to microscopic parts of magnets are risky, if swallowed, which gains importance in the context of child safety. It is also worth noting that small elements of these magnets are able to disrupt the diagnostic process medical when they are in the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Maximum magnetic pulling forcewhat it depends on?

The force parameter is a theoretical maximum value performed under specific, ideal conditions:

  • on a block made of mild steel, perfectly concentrating the magnetic field
  • possessing a thickness of min. 10 mm to avoid saturation
  • with a plane cleaned and smooth
  • without any clearance between the magnet and steel
  • for force acting at a right angle (pull-off, not shear)
  • in temp. approx. 20°C

What influences lifting capacity in practice

Effective lifting capacity impacted by working environment parameters, including (from most important):

  • Clearance – the presence of any layer (rust, tape, air) interrupts the magnetic circuit, which reduces capacity rapidly (even by 50% at 0.5 mm).
  • Force direction – remember that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops drastically, often to levels of 20-30% of the nominal value.
  • Wall thickness – thin material does not allow full use of the magnet. Part of the magnetic field passes through the material instead of generating force.
  • Chemical composition of the base – low-carbon steel gives the best results. Alloy admixtures lower magnetic permeability and lifting capacity.
  • Surface condition – smooth surfaces ensure maximum contact, which increases force. Uneven metal weaken the grip.
  • Heat – neodymium magnets have a negative temperature coefficient. When it is hot they lose power, and in frost gain strength (up to a certain limit).

* Lifting capacity testing was conducted on a smooth plate of optimal thickness, under perpendicular forces, however under parallel forces the holding force is lower. In addition, even a minimal clearance {between} the magnet and the plate decreases the load capacity.

Warnings

Maximum temperature

Standard neodymium magnets (N-type) lose magnetization when the temperature surpasses 80°C. This process is irreversible.

Life threat

Warning for patients: Strong magnetic fields affect electronics. Keep at least 30 cm distance or request help to work with the magnets.

Respect the power

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

Adults only

Product intended for adults. Small elements pose a choking risk, leading to severe trauma. Keep away from kids and pets.

Physical harm

Watch your fingers. Two powerful magnets will join instantly with a force of massive weight, crushing everything in their path. Be careful!

Mechanical processing

Combustion risk: Neodymium dust is explosive. Do not process magnets in home conditions as this may cause fire.

Safe distance

Device Safety: Neodymium magnets can damage payment cards and delicate electronics (pacemakers, medical aids, mechanical watches).

Allergy Warning

Nickel alert: The Ni-Cu-Ni coating contains nickel. If skin irritation appears, cease handling magnets and wear gloves.

Beware of splinters

Despite metallic appearance, the material is brittle and cannot withstand shocks. Do not hit, as the magnet may crumble into hazardous fragments.

Threat to navigation

A powerful magnetic field negatively affects the functioning of magnetometers in phones and GPS navigation. Do not bring magnets close to a smartphone to avoid breaking the sensors.

Attention!

Details about hazards in the article: Magnet Safety Guide.

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98