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neodymium magnets

We offer red color magnets Nd2Fe14B - our offer. Practically all "neodymium magnets" on our website are in stock for immediate purchase (see the list). Check out the magnet price list for more details see 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. 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 outer layer is hygienic acid-resistant steel, approved for food contact. 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. We recommend sticking packing tape to the cluster of filings and tearing it off together with the contaminants. 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. For basic machine protection against pieces of iron, standard power is sufficient. For the food and precision industry, we recommend the highest induction parameters.
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.

Strengths as well as weaknesses of neodymium magnets.

Apart from their superior magnetic energy, neodymium magnets have these key benefits:

  • They virtually do not lose strength, because even after 10 years the decline in efficiency is only ~1% (in laboratory conditions),
  • They do not lose their magnetic properties even under external field action,
  • The use of an refined layer of noble metals (nickel, gold, silver) causes the element to look better,
  • Neodymium magnets ensure maximum magnetic induction on a contact point, which increases force concentration,
  • Through (adequate) combination of ingredients, they can achieve high thermal strength, allowing for action at temperatures reaching 230°C and above...
  • In view of the option of accurate forming and customization to specialized projects, NdFeB magnets can be manufactured in a variety of shapes and sizes, which increases their versatility,
  • Fundamental importance in electronics industry – they are used in mass storage devices, drive modules, medical equipment, also industrial machines.
  • Thanks to concentrated force, small magnets offer high operating force, occupying minimum space,

Drawbacks and weaknesses of neodymium magnets and ways of using them

  • Brittleness is one of their disadvantages. Upon strong impact they can fracture. We recommend keeping them in a steel housing, which not only protects them against impacts but also raises their durability
  • Neodymium magnets lose their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
  • Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
  • Limited possibility of creating threads in the magnet and complex forms - recommended is casing - magnet mounting.
  • Possible danger related to microscopic parts of magnets pose a threat, if swallowed, which gains importance in the context of child safety. Additionally, small components of these devices can disrupt the diagnostic process medical after entering the body.
  • With large orders the cost of neodymium magnets is a challenge,

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

The load parameter shown concerns the limit force, recorded under laboratory conditions, namely:

  • with the application of a sheet made of low-carbon steel, guaranteeing full magnetic saturation
  • possessing a thickness of minimum 10 mm to avoid saturation
  • characterized by even structure
  • without any clearance between the magnet and steel
  • for force applied at a right angle (pull-off, not shear)
  • in temp. approx. 20°C

Lifting capacity in real conditions – factors

Please note that the magnet holding may be lower subject to the following factors, starting with the most relevant:

  • Clearance – existence of foreign body (paint, dirt, gap) acts as an insulator, which lowers power steeply (even by 50% at 0.5 mm).
  • Loading method – declared lifting capacity refers to detachment vertically. When slipping, the magnet holds significantly lower power (often approx. 20-30% of nominal force).
  • Base massiveness – insufficiently thick steel does not close the flux, causing part of the flux to be wasted to the other side.
  • Material composition – not every steel reacts the same. Alloy additives weaken the interaction with the magnet.
  • Surface condition – smooth surfaces guarantee perfect abutment, which increases field saturation. Rough surfaces weaken the grip.
  • Temperature – temperature increase causes a temporary drop of induction. It is worth remembering the thermal limit for a given model.

* Holding force was checked on the plate surface of 20 mm thickness, when the force acted perpendicularly, however under attempts to slide the magnet the holding force is lower. Additionally, even a small distance {between} the magnet and the plate lowers the load capacity.

Safe handling of neodymium magnets

Adults only

Strictly store magnets out of reach of children. Ingestion danger is significant, and the effects of magnets clamping inside the body are fatal.

Do not underestimate power

Use magnets with awareness. Their powerful strength can surprise even professionals. Be vigilant and do not underestimate their force.

Machining danger

Drilling and cutting of NdFeB material carries a risk of fire risk. Neodymium dust reacts violently with oxygen and is hard to extinguish.

Danger to pacemakers

Medical warning: Strong magnets can turn off heart devices and defibrillators. Stay away if you have electronic implants.

Electronic hazard

Do not bring magnets near a wallet, laptop, or screen. The magnetism can destroy these devices and wipe information from cards.

Do not overheat magnets

Regular neodymium magnets (grade N) undergo demagnetization when the temperature surpasses 80°C. Damage is permanent.

Pinching danger

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

Fragile material

Neodymium magnets are sintered ceramics, which means they are prone to chipping. Collision of two magnets will cause them cracking into shards.

Metal Allergy

Nickel alert: The nickel-copper-nickel coating contains nickel. If an allergic reaction appears, cease working with magnets and wear gloves.

Compass and GPS

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

Danger!

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