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neodymium magnets

We provide red color magnetic Nd2Fe14B - our proposal. Practically all "neodymium magnets" on our website are available for immediate delivery (see the list). See the magnet pricing for more details see the magnet price list

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SM 25x200 [2xM8] / N52 - magnetic separator

magnetic separator

Catalog no 130364

GTIN: 5906301813125

0

Diameter Ø [±0,1 mm]

25 mm

Height [±0,1 mm]

200 mm

Weight

0.01 g

615.00 with VAT / pcs + price for transport

500.00 ZŁ net + 23% VAT / pcs

bulk discounts:

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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 [±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

This product serves to effectively catch ferromagnetic contaminants from bulk and liquid products. It is commonly used for cleaning flour, sugar, plastic granules, as well as oils and coolants. High magnetic induction on the surface allows catching the finest iron particles.
The rod consists of a cover tube made of high-quality acid-resistant steel (AISI 304 or 316). The core is a precise magnetic system generating high induction (Gauss). Such construction ensures full resistance to corrosion, water, oils, and acids.
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.
The Gauss value tells us how effectively and deeply the magnet will catch contaminants. 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. The rod end is strictly adapted to the fastening system in your device. Contact us for a quote on a non-standard dimension.

Pros as well as cons of rare earth magnets.

In addition to their long-term stability, neodymium magnets provide the following advantages:

  • Their strength is durable, and after approximately ten years it decreases only by ~1% (according to research),
  • They show high resistance to demagnetization induced by presence of other magnetic fields,
  • The use of an shiny finish of noble metals (nickel, gold, silver) causes the element to look better,
  • Neodymium magnets create maximum magnetic induction on a small surface, which ensures high operational effectiveness,
  • Through (adequate) combination of ingredients, they can achieve high thermal resistance, allowing for functioning at temperatures approaching 230°C and above...
  • Thanks to flexibility in designing and the ability to adapt to individual projects,
  • Huge importance in electronics industry – they are utilized in data components, electric motors, precision medical tools, and technologically advanced constructions.
  • Relatively small size with high pulling force – neodymium magnets offer high power in compact dimensions, which makes them useful in small systems

Cons of neodymium magnets: tips and applications.

  • They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only shields the magnet but also increases its resistance to damage
  • Neodymium magnets lose their power 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
  • They oxidize in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • We suggest cover - magnetic mechanism, due to difficulties in realizing threads inside the magnet and complex shapes.
  • Potential hazard related to microscopic parts of magnets are risky, if swallowed, which becomes key in the context of child health protection. Additionally, tiny parts of these magnets are able to disrupt the diagnostic process medical in case of swallowing.
  • Due to complex production process, their price is relatively high,

Maximum lifting force for a neodymium magnet – what affects it?

Holding force of 0 kg is a measurement result executed under standard conditions:

  • using a base made of mild steel, serving as a magnetic yoke
  • with a thickness no less than 10 mm
  • with a plane cleaned and smooth
  • without any air gap between the magnet and steel
  • for force acting at a right angle (pull-off, not shear)
  • at ambient temperature approx. 20 degrees Celsius

Magnet lifting force in use – key factors

In real-world applications, the real power depends on a number of factors, listed from the most important:

  • Clearance – existence of foreign body (paint, tape, air) acts as an insulator, which reduces capacity rapidly (even by 50% at 0.5 mm).
  • Load vector – maximum parameter is obtained only during pulling at a 90° angle. The force required to slide of the magnet along the plate is standardly many times lower (approx. 1/5 of the lifting capacity).
  • Steel thickness – too thin plate causes magnetic saturation, causing part of the power to be escaped into the air.
  • Steel grade – ideal substrate is pure iron steel. Stainless steels may attract less.
  • Smoothness – ideal contact is possible only on polished steel. Rough texture reduce the real contact area, weakening the magnet.
  • Thermal factor – hot environment weakens magnetic field. Too high temperature can permanently demagnetize the magnet.

* Lifting capacity testing was performed on a smooth plate of optimal thickness, under a perpendicular pulling force, whereas under parallel forces the lifting capacity is smaller. Additionally, even a minimal clearance {between} the magnet and the plate reduces the load capacity.

H&S for magnets

Mechanical processing

Dust produced during grinding of magnets is flammable. Do not drill into magnets without proper cooling and knowledge.

No play value

Adult use only. Small elements can be swallowed, causing intestinal necrosis. Store away from children and animals.

Protective goggles

Neodymium magnets are ceramic materials, meaning they are fragile like glass. Clashing of two magnets will cause them cracking into shards.

Permanent damage

Standard neodymium magnets (N-type) undergo demagnetization when the temperature exceeds 80°C. This process is irreversible.

Bone fractures

Protect your hands. Two powerful magnets will snap together instantly with a force of massive weight, crushing anything in their path. Be careful!

Avoid contact if allergic

Warning for allergy sufferers: The nickel-copper-nickel coating consists of nickel. If an allergic reaction occurs, immediately stop working with magnets and wear gloves.

ICD Warning

People with a heart stimulator should maintain an safe separation from magnets. The magnetic field can disrupt the operation of the life-saving device.

Conscious usage

Be careful. Rare earth magnets attract from a long distance and connect with massive power, often quicker than you can move away.

Precision electronics

An intense magnetic field negatively affects the operation of compasses in smartphones and navigation systems. Keep magnets near a device to prevent breaking the sensors.

Protect data

Device Safety: Strong magnets can ruin data carriers and delicate electronics (pacemakers, hearing aids, mechanical watches).

Warning!

Need more info? Read our article: Are neodymium magnets dangerous?

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98