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neodymium magnets

We provide blue color magnets Nd2Fe14B - our store's offer. Practically all magnesy on our website are available 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 32x425 [2xM8] / N42 - magnetic separator

magnetic separator

Catalog no 130380

GTIN: 5906301813286

0

Diameter Ø [±0,1 mm]

32 mm

Height [±0,1 mm]

425 mm

Weight

2280 g

1266.90 with VAT / pcs + price for transport

1030.00 ZŁ net + 23% VAT / pcs

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1266.90 ZŁ
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927.00 ZŁ
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Lifting power along with form of neodymium magnets can be verified on our power calculator.

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SM 32x425 [2xM8] / N42 - magnetic separator
Specification/characteristics SM 32x425 [2xM8] / N42 - magnetic separator
properties
values
Cat. no.
130380
GTIN
5906301813286
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
32 mm [±0,1 mm]
Height
425 mm [±0,1 mm]
Weight
2280 g [±0,1 mm]
Manufacturing Tolerance
± 0.1 mm

Magnetic properties of material N42

properties
values
units
remenance Br [Min. - Max.] ?
12.9-13.2
kGs
remenance Br [Min. - Max.] ?
1290-1320
T
coercivity bHc ?
10.8-12.0
kOe
coercivity bHc ?
860-955
kA/m
actual internal force iHc
≥ 12
kOe
actual internal force iHc
≥ 955
kA/m
energy density [Min. - Max.] ?
40-42
BH max MGOe
energy density [Min. - Max.] ?
318-334
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

A magnetic rod is the basic element of building grate separators and magnetic filters. 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). 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). For easier operation, it is worth considering ordering a rod in a version with a cleaning sleeve.
The more Gauss, the smaller and more weakly magnetic particles will be effectively caught. For basic machine protection against pieces of iron, standard power is sufficient. High induction is necessary when contaminants are microscopic or weakly magnetic.
We fulfill individual orders for bars perfectly matched to your machine or separator. We offer various tip options: threaded holes (e.g., M8, M10), protruding screws, flat pivots, mills, or handles. Contact us for a quote on a non-standard dimension.

Pros and cons of neodymium magnets.

Besides their exceptional magnetic power, neodymium magnets offer the following advantages:

  • They have unchanged lifting capacity, and over around 10 years their performance decreases symbolically – ~1% (according to theory),
  • They maintain their magnetic properties even under external field action,
  • The use of an aesthetic layer of noble metals (nickel, gold, silver) causes the element to look better,
  • They show high magnetic induction at the operating surface, which improves attraction properties,
  • Neodymium magnets are characterized by extremely 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...
  • Thanks to flexibility in forming and the capacity to adapt to individual projects,
  • Fundamental importance in innovative solutions – they are utilized in hard drives, electric drive systems, medical equipment, also multitasking production systems.
  • Thanks to concentrated force, small magnets offer high operating force, with minimal size,

Characteristics of disadvantages of neodymium magnets and ways of using them

  • To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution protects the magnet and simultaneously increases its durability.
  • When exposed to high temperature, neodymium magnets suffer a drop in strength. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size, as well as 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 magnets in rubber or plastics, which prevent oxidation and corrosion.
  • Limited possibility of making nuts in the magnet and complex forms - preferred is a housing - magnet mounting.
  • Health risk resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which is particularly important in the context of child health protection. Furthermore, tiny parts of these magnets can complicate diagnosis medical after entering the body.
  • With large orders the cost of neodymium magnets is economically unviable,

Highest magnetic holding forcewhat affects it?

Information about lifting capacity was defined for optimal configuration, taking into account:

  • with the use of a yoke made of low-carbon steel, guaranteeing maximum field concentration
  • whose transverse dimension equals approx. 10 mm
  • with an ideally smooth contact surface
  • under conditions of no distance (surface-to-surface)
  • for force acting at a right angle (in the magnet axis)
  • at temperature approx. 20 degrees Celsius

Lifting capacity in real conditions – factors

Real force is influenced by working environment parameters, such as (from priority):

  • Air gap (betwixt the magnet and the plate), because even a microscopic distance (e.g. 0.5 mm) can cause a reduction in lifting capacity by up to 50% (this also applies to varnish, corrosion or debris).
  • Angle of force application – highest force is obtained only during pulling at a 90° angle. The resistance to sliding of the magnet along the plate is typically several times lower (approx. 1/5 of the lifting capacity).
  • Element thickness – to utilize 100% power, the steel must be adequately massive. Thin sheet restricts the attraction force (the magnet "punches through" it).
  • Material composition – different alloys attracts identically. Alloy additives worsen the interaction with the magnet.
  • Surface structure – the more even the plate, the larger the contact zone and stronger the hold. Roughness creates an air distance.
  • Thermal factor – hot environment reduces magnetic field. Too high temperature can permanently demagnetize the magnet.

* Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, however under shearing force the lifting capacity is smaller. Additionally, even a slight gap {between} the magnet and the plate reduces the load capacity.

Safe handling of NdFeB magnets

Allergic reactions

Studies show that nickel (the usual finish) is a potent allergen. If you have an allergy, refrain from direct skin contact or choose encased magnets.

Swallowing risk

Absolutely store magnets out of reach of children. Ingestion danger is significant, and the effects of magnets connecting inside the body are very dangerous.

Respect the power

Be careful. Rare earth magnets act from a distance and connect with huge force, often quicker than you can react.

Heat sensitivity

Watch the temperature. Heating the magnet above 80 degrees Celsius will ruin its properties and pulling force.

Serious injuries

Risk of injury: The attraction force is so immense that it can result in blood blisters, crushing, and broken bones. Protective gloves are recommended.

Protective goggles

Despite metallic appearance, neodymium is brittle and cannot withstand shocks. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.

Danger to pacemakers

Patients with a heart stimulator should maintain an large gap from magnets. The magnetic field can interfere with the functioning of the life-saving device.

Keep away from computers

Powerful magnetic fields can corrupt files on payment cards, HDDs, and storage devices. Maintain a gap of at least 10 cm.

Do not drill into magnets

Drilling and cutting of neodymium magnets carries a risk of fire hazard. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.

Compass and GPS

A powerful magnetic field disrupts the operation of magnetometers in smartphones and GPS navigation. Maintain magnets close to a device to avoid breaking the sensors.

Attention!

Learn more about hazards in the article: Magnet Safety Guide.

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98