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neodymium magnets

We offer blue color magnets Nd2Fe14B - our store's offer. All "neodymium magnets" in our store are in stock for immediate delivery (see the list). Check out the magnet pricing for more details see the magnet price list

Magnets for water searching F200 GOLD

Where to purchase very strong neodymium magnet? Magnetic holders in airtight and durable steel enclosure are ideally suited for use in variable and difficult climate conditions, including during rain and snow see

magnets with holders

Holders with magnets can be applied to enhance production processes, underwater discoveries, or finding meteors made of metal see more...

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Dhit sp. z o.o.
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SM 25x200 [2xM8] / N52 - magnetic separator

magnetic separator

Catalog no 130364

GTIN: 5906301813125

0

Diameter Ø

25 mm [±1 mm]

Height

200 mm [±1 mm]

Weight

0.01 g

Magnetic Flux

~ 9 500 Gauss [±5%]

615.00 with VAT / pcs + price for transport

500.00 ZŁ net + 23% VAT / pcs

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SM 25x200 [2xM8] / N52 - magnetic separator
Specification/characteristics SM 25x200 [2xM8] / N52 - magnetic separator
properties
values
Cat. no.
130364
GTIN
5906301813125
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 product serves to effectively catch ferromagnetic contaminants from bulk and liquid products. Its task is separation (separation) of metal filings from the transported material. Thanks to the use of strong neodymium magnets, the rod catches even metallic dust.
The rod consists of a cover tube made of high-quality acid-resistant steel (AISI 304 or 316). Inside there is a stack of strong neodymium magnets arranged in a special configuration (magnetic circuit). Thanks to this, the rod is durable, hygienic, and easy to keep clean.
Due to the high power of the magnet, direct removal of filings can be troublesome and time-consuming. 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 induction is necessary when contaminants are microscopic or weakly magnetic.
We can produce a rod of non-standard length with any mounting termination. You can choose a mounting method consistent with your technical design. Contact us for a quote on a non-standard dimension.

Advantages as well as disadvantages of neodymium magnets.

In addition to their pulling strength, neodymium magnets provide the following advantages:

  • They have constant strength, and over nearly 10 years their performance decreases symbolically – ~1% (according to theory),
  • They have excellent resistance to magnetism drop when exposed to external magnetic sources,
  • The use of an refined coating of noble metals (nickel, gold, silver) causes the element to look better,
  • Magnetic induction on the working layer of the magnet turns out to be very high,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and are able to act (depending on the shape) even at a temperature of 230°C or more...
  • Possibility of individual modeling and modifying to concrete needs,
  • Significant place in future technologies – they are used in mass storage devices, electric motors, precision medical tools, as well as modern systems.
  • Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,

Disadvantages of NdFeB magnets:

  • Susceptibility to cracking is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a steel housing, which not only secures them against impacts but also increases their durability
  • We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
  • Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
  • Limited possibility of producing nuts in the magnet and complicated forms - preferred is cover - mounting mechanism.
  • Potential hazard related to microscopic parts of magnets pose a threat, in case of ingestion, which gains importance in the context of child health protection. Additionally, tiny parts of these magnets can disrupt the diagnostic process medical when they are in the body.
  • High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which hinders application in large quantities

Detachment force of the magnet in optimal conditionswhat affects it?

Magnet power is the result of a measurement for the most favorable conditions, taking into account:

  • using a sheet made of high-permeability steel, serving as a circuit closing element
  • possessing a massiveness of min. 10 mm to ensure full flux closure
  • characterized by even structure
  • with direct contact (without paint)
  • under perpendicular force direction (90-degree angle)
  • at room temperature

Lifting capacity in practice – influencing factors

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

  • Clearance – the presence of any layer (rust, tape, gap) interrupts the magnetic circuit, which reduces power steeply (even by 50% at 0.5 mm).
  • Loading method – declared lifting capacity refers to detachment vertically. When applying parallel force, the magnet exhibits much less (typically approx. 20-30% of nominal force).
  • Substrate thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
  • Steel type – low-carbon steel gives the best results. Alloy steels decrease magnetic properties and lifting capacity.
  • Plate texture – smooth surfaces guarantee perfect abutment, which improves force. Uneven metal reduce efficiency.
  • Thermal environment – temperature increase results in weakening of induction. Check the thermal limit for a given model.

* Lifting capacity was assessed using a smooth steel plate of optimal thickness (min. 20 mm), under perpendicular pulling force, whereas under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a minimal clearance {between} the magnet and the plate decreases the lifting capacity.

H&S for magnets

Serious injuries

Danger of trauma: The pulling power is so immense that it can result in blood blisters, crushing, and even bone fractures. Use thick gloves.

Fire risk

Machining of NdFeB material poses a fire risk. Magnetic powder reacts violently with oxygen and is difficult to extinguish.

Beware of splinters

Neodymium magnets are ceramic materials, meaning they are very brittle. Collision of two magnets leads to them cracking into small pieces.

Choking Hazard

Adult use only. Small elements pose a choking risk, leading to severe trauma. Store out of reach of kids and pets.

Threat to navigation

Navigation devices and smartphones are highly sensitive to magnetism. Direct contact with a powerful NdFeB magnet can decalibrate the internal compass in your phone.

Avoid contact if allergic

Warning for allergy sufferers: The Ni-Cu-Ni coating contains nickel. If skin irritation occurs, cease working with magnets and wear gloves.

Handling guide

Handle magnets consciously. Their powerful strength can surprise even experienced users. Stay alert and do not underestimate their force.

Medical interference

Life threat: Neodymium magnets can deactivate pacemakers and defibrillators. Do not approach if you have medical devices.

Heat sensitivity

Standard neodymium magnets (grade N) lose power when the temperature exceeds 80°C. This process is irreversible.

Electronic hazard

Equipment safety: Strong magnets can ruin data carriers and sensitive devices (heart implants, hearing aids, mechanical watches).

Warning!

Details about risks in the article: Magnet Safety Guide.

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98