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neodymium magnets

We provide yellow color magnetic Nd2Fe14B - our store's offer. Practically all magnesy 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

Magnet for searching F300 GOLD

Where to buy powerful neodymium magnet? Magnetic holders in airtight, solid steel enclosure are perfect for use in difficult climate conditions, including in the rain and snow more information...

magnets with holders

Magnetic holders can be applied to facilitate manufacturing, exploring underwater areas, or finding meteors made of ore more information...

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SM 18x300 [2xM5] / N42 - magnetic separator

magnetic separator

Catalog no 130277

GTIN: 5906301812791

0

Diameter Ø [±0,1 mm]

18 mm

Height [±0,1 mm]

300 mm

Weight

0.01 g

664.20 with VAT / pcs + price for transport

540.00 ZŁ net + 23% VAT / pcs

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SM 18x300 [2xM5] / N42 - magnetic separator
Specification/characteristics SM 18x300 [2xM5] / N42 - magnetic separator
properties
values
Cat. no.
130277
GTIN
5906301812791
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
18 mm [±0,1 mm]
Height
300 mm [±0,1 mm]
Weight
0.01 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

It is the "heart" of every magnetic filter used in industry for cleaning raw materials. 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 core is a precise magnetic system generating high induction (Gauss). Such construction ensures full resistance to corrosion, water, oils, and acids.
Metal filings stick to the surface very strongly, so cleaning requires strength or cleverness. 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.
The Gauss value tells us how effectively and deeply the magnet will catch contaminants. The economical version (8kGs) handles large pieces of metal perfectly. High Power versions (~12000-14000 Gs) are necessary for catching metallic dust, oxides, and stainless steel after processing.
We can produce a rod of non-standard length with any mounting termination. 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.

Strengths as well as weaknesses of NdFeB magnets.

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

  • They retain magnetic properties for around ten years – the loss is just ~1% (in theory),
  • Magnets perfectly protect themselves against demagnetization caused by foreign field sources,
  • By covering with a decorative layer of gold, the element acquires an modern look,
  • Magnetic induction on the working layer of the magnet is very high,
  • Thanks to resistance to high temperature, they can operate (depending on the form) even at temperatures up to 230°C and higher...
  • Thanks to versatility in shaping and the ability to customize to client solutions,
  • Universal use in advanced technology sectors – they find application in data components, brushless drives, medical devices, as well as multitasking production systems.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Problematic aspects of neodymium magnets: weaknesses and usage proposals

  • To avoid cracks under impact, we recommend using special steel holders. Such a solution protects the magnet and simultaneously improves its durability.
  • When exposed to high temperature, neodymium magnets suffer a drop in force. 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
  • They rust in a humid environment. For use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
  • We recommend cover - magnetic mount, due to difficulties in producing threads inside the magnet and complicated shapes.
  • Potential hazard related to microscopic parts of magnets can be dangerous, if swallowed, which gains importance in the context of child health protection. Additionally, tiny parts of these devices can disrupt the diagnostic process medical when they are in the body.
  • With budget limitations the cost of neodymium magnets can be a barrier,

Magnetic strength at its maximum – what contributes to it?

The force parameter is a result of laboratory testing executed under the following configuration:

  • using a sheet made of high-permeability steel, acting as a magnetic yoke
  • whose thickness equals approx. 10 mm
  • with a surface perfectly flat
  • without the slightest air gap between the magnet and steel
  • for force applied at a right angle (pull-off, not shear)
  • at temperature room level

What influences lifting capacity in practice

Holding efficiency impacted by specific conditions, such as (from most important):

  • Gap between magnet and steel – even a fraction of a millimeter of separation (caused e.g. by veneer or unevenness) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
  • Force direction – remember that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops drastically, often to levels of 20-30% of the nominal value.
  • Base massiveness – insufficiently thick steel does not accept the full field, causing part of the power to be lost into the air.
  • Material composition – different alloys reacts the same. High carbon content worsen the interaction with the magnet.
  • Plate texture – smooth surfaces ensure maximum contact, which increases force. Uneven metal weaken the grip.
  • Temperature influence – high temperature reduces magnetic field. Exceeding the limit temperature can permanently damage the magnet.

* Holding force was tested on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, whereas under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a slight gap {between} the magnet and the plate lowers the load capacity.

H&S for magnets

Electronic hazard

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

Dust explosion hazard

Drilling and cutting of NdFeB material carries a risk of fire hazard. Magnetic powder reacts violently with oxygen and is difficult to extinguish.

Power loss in heat

Control the heat. Exposing the magnet above 80 degrees Celsius will permanently weaken its magnetic structure and strength.

Pacemakers

Warning for patients: Powerful magnets disrupt electronics. Maintain at least 30 cm distance or ask another person to handle the magnets.

Do not underestimate power

Before use, check safety instructions. Sudden snapping can break the magnet or injure your hand. Think ahead.

Compass and GPS

Note: neodymium magnets generate a field that confuses precision electronics. Maintain a separation from your mobile, device, and navigation systems.

Skin irritation risks

Warning for allergy sufferers: The Ni-Cu-Ni coating consists of nickel. If skin irritation happens, immediately stop working with magnets and use protective gear.

Danger to the youngest

Always keep magnets away from children. Choking hazard is high, and the effects of magnets clamping inside the body are life-threatening.

Crushing force

Watch your fingers. Two large magnets will snap together instantly with a force of massive weight, crushing everything in their path. Be careful!

Shattering risk

Despite metallic appearance, neodymium is brittle and not impact-resistant. Avoid impacts, as the magnet may shatter into hazardous fragments.

Caution!

Need more info? Check our post: Are neodymium magnets dangerous?

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98