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neodymium magnets

We offer yellow color magnetic Nd2Fe14B - our offer. Practically all magnesy neodymowe in our store are available for immediate delivery (see the list). See the magnet price list for more details check the magnet price list

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SM 25x175 [2xM8] / N52 - magnetic separator

magnetic separator

Catalog no 130369

GTIN: 5906301813170

0

Diameter Ø

25 mm [±1 mm]

Height

175 mm [±1 mm]

Weight

0.01 g

Magnetic Flux

~ 9 500 Gauss [±5%]

541.20 with VAT / pcs + price for transport

440.00 ZŁ net + 23% VAT / pcs

bulk discounts:

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SM 25x175 [2xM8] / N52 - magnetic separator
Specification/characteristics SM 25x175 [2xM8] / N52 - magnetic separator
properties
values
Cat. no.
130369
GTIN
5906301813170
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
25 mm [±1 mm]
Height
175 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 - 6 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 product serves to effectively catch ferromagnetic contaminants from bulk and liquid products. It is mounted in chutes, hoppers, and pipelines to protect production machines from failure. Thanks to the use of strong neodymium magnets, the rod catches even metallic dust.
The construction relies on a sealed, welded stainless steel housing, polished smooth. The center is filled with NdFeB magnets and pole pieces, arranged to maximize the field on the tube surface. Thanks to this, the rod is durable, hygienic, and easy to keep clean.
Metal contaminants are strongly attracted, so removing them with a bare hand or glove can be difficult. You can use compressed air or special non-magnetic strippers (rings). In industry, cover tubes (so-called Easy Clean system) are used, from which the magnetic insert slides out.
Magnetic induction measured in Gauss (Gs) determines the density of magnetic flux on the rod surface. Standard rods (~8000 Gs) are sufficient for catching screws, nails, and steel shavings. High Power versions (~12000-14000 Gs) are necessary for catching metallic dust, oxides, and stainless steel after processing.
We fulfill individual orders for bars perfectly matched to your machine or separator. You can choose a mounting method consistent with your technical design. We ensure fast realization of special orders and technical advice.

Advantages as well as disadvantages of NdFeB magnets.

In addition to their magnetic capacity, neodymium magnets provide the following advantages:

  • They retain full power for around 10 years – the drop is just ~1% (according to analyses),
  • They have excellent resistance to magnetic field loss when exposed to external magnetic sources,
  • A magnet with a shiny silver surface is more attractive,
  • The surface of neodymium magnets generates a powerful magnetic field – this is one of their assets,
  • Through (adequate) combination of ingredients, they can achieve high thermal strength, allowing for operation at temperatures approaching 230°C and above...
  • Considering the potential of free shaping and customization to custom projects, neodymium magnets can be produced in a variety of shapes and sizes, which makes them more universal,
  • Huge importance in innovative solutions – they serve a role in HDD drives, brushless drives, diagnostic systems, also technologically advanced constructions.
  • Relatively small size with high pulling force – neodymium magnets offer high power in tiny dimensions, which makes them useful in small systems

Disadvantages of neodymium magnets:

  • At strong impacts they can break, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • When exposed to high temperature, neodymium magnets experience a drop in power. Often, when the temperature exceeds 80°C, their power decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • When exposed to humidity, magnets start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
  • Due to limitations in creating nuts and complex shapes in magnets, we recommend using cover - magnetic mechanism.
  • Health risk resulting from small fragments of magnets are risky, if swallowed, which is particularly important in the aspect of protecting the youngest. Additionally, small elements of these devices are able to be problematic in diagnostics medical after entering the body.
  • With budget limitations the cost of neodymium magnets can be a barrier,

Highest magnetic holding forcewhat it depends on?

The declared magnet strength represents the limit force, obtained under laboratory conditions, meaning:

  • on a base made of mild steel, optimally conducting the magnetic flux
  • whose transverse dimension reaches at least 10 mm
  • characterized by even structure
  • with direct contact (without coatings)
  • for force applied at a right angle (pull-off, not shear)
  • at temperature room level

Practical lifting capacity: influencing factors

Please note that the working load will differ subject to the following factors, in order of importance:

  • Distance – existence of any layer (paint, dirt, air) interrupts the magnetic circuit, which reduces power steeply (even by 50% at 0.5 mm).
  • Force direction – declared lifting capacity refers to detachment vertically. When applying parallel force, the magnet exhibits much less (often approx. 20-30% of maximum force).
  • Wall thickness – thin material does not allow full use of the magnet. Magnetic flux penetrates through instead of generating force.
  • Steel grade – ideal substrate is pure iron steel. Stainless steels may attract less.
  • Surface finish – ideal contact is obtained only on smooth steel. Any scratches and bumps reduce the real contact area, reducing force.
  • Operating temperature – neodymium magnets have a negative temperature coefficient. At higher temperatures they are weaker, and at low temperatures they can be stronger (up to a certain limit).

* Lifting capacity was measured using a polished steel plate of suitable thickness (min. 20 mm), under perpendicular detachment force, whereas under shearing force the holding force is lower. Additionally, even a small distance {between} the magnet and the plate decreases the holding force.

Warnings

Material brittleness

Despite metallic appearance, the material is delicate and not impact-resistant. Do not hit, as the magnet may shatter into sharp, dangerous pieces.

Life threat

Warning for patients: Powerful magnets disrupt medical devices. Keep minimum 30 cm distance or ask another person to handle the magnets.

Nickel allergy

Allergy Notice: The Ni-Cu-Ni coating consists of nickel. If an allergic reaction occurs, immediately stop working with magnets and wear gloves.

Handling rules

Before use, check safety instructions. Uncontrolled attraction can destroy the magnet or injure your hand. Be predictive.

Magnetic interference

An intense magnetic field disrupts the operation of compasses in smartphones and GPS navigation. Keep magnets near a smartphone to prevent breaking the sensors.

Danger to the youngest

Absolutely keep magnets out of reach of children. Choking hazard is high, and the effects of magnets clamping inside the body are very dangerous.

Permanent damage

Regular neodymium magnets (grade N) lose power when the temperature exceeds 80°C. The loss of strength is permanent.

Protect data

Data protection: Strong magnets can ruin payment cards and sensitive devices (heart implants, medical aids, timepieces).

Combustion hazard

Fire hazard: Rare earth powder is highly flammable. Do not process magnets in home conditions as this may cause fire.

Bodily injuries

Protect your hands. Two powerful magnets will join immediately with a force of several hundred kilograms, crushing everything in their path. Be careful!

Important!

More info about risks in the article: Magnet Safety Guide.

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98