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neodymium magnets

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SM 32x200 [2xM8] / N42 - magnetic separator

magnetic separator

Catalog no 130298

GTIN: 5906301812913

0

Diameter Ø

32 mm [±1 mm]

Height

200 mm [±1 mm]

Weight

1070 g

Magnetic Flux

~ 8 000 Gauss [±5%]

602.70 with VAT / pcs + price for transport

490.00 ZŁ net + 23% VAT / pcs

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SM 32x200 [2xM8] / N42 - magnetic separator
Specification/characteristics SM 32x200 [2xM8] / N42 - magnetic separator
properties
values
Cat. no.
130298
GTIN
5906301812913
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
32 mm [±1 mm]
Height
200 mm [±1 mm]
Weight
1070 g
Material Type
Stainless steel AISI 304 / A2
Magnetic Flux
~ 8 000 Gauss [±5%]
Size/Mount Quantity
2xM8
Polarity
circumferential - 7 poles
Casing Tube Thickness
1 mm
Manufacturing Tolerance
±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. 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. Such construction ensures full resistance to corrosion, water, oils, and acids.
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. 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. The rod end is strictly adapted to the fastening system in your device. Contact us for a quote on a non-standard dimension.

Advantages as well as disadvantages of neodymium magnets.

Besides their stability, neodymium magnets are valued for these benefits:

  • Their strength is maintained, and after around 10 years it decreases only by ~1% (according to research),
  • They maintain their magnetic properties even under close interference source,
  • Thanks to the elegant finish, the layer of Ni-Cu-Ni, gold-plated, or silver gives an elegant appearance,
  • They feature high magnetic induction at the operating surface, making them more effective,
  • Thanks to resistance to high temperature, they are capable of working (depending on the form) even at temperatures up to 230°C and higher...
  • In view of the possibility of free molding and customization to individualized projects, neodymium magnets can be manufactured in a broad palette of shapes and sizes, which expands the range of possible applications,
  • Fundamental importance in modern industrial fields – they are commonly used in HDD drives, electromotive mechanisms, advanced medical instruments, and other advanced devices.
  • Thanks to concentrated force, small magnets offer high operating force, in miniature format,

Drawbacks and weaknesses of neodymium magnets and ways of using them

  • They are fragile upon heavy impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only protects the magnet but also increases its resistance to damage
  • When exposed to high temperature, neodymium magnets experience a drop in strength. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • Magnets exposed to a humid environment can rust. Therefore during using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
  • Due to limitations in producing threads and complicated shapes in magnets, we propose using a housing - magnetic mechanism.
  • Health risk resulting from small fragments of magnets pose a threat, in case of ingestion, which is particularly important in the context of child health protection. Additionally, small elements of these products are able to 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

Optimal lifting capacity of a neodymium magnetwhat contributes to it?

Breakaway force was defined for ideal contact conditions, assuming:

  • with the use of a yoke made of low-carbon steel, guaranteeing full magnetic saturation
  • possessing a massiveness of at least 10 mm to ensure full flux closure
  • with a surface cleaned and smooth
  • without any insulating layer between the magnet and steel
  • during pulling in a direction vertical to the mounting surface
  • at temperature room level

Lifting capacity in real conditions – factors

Effective lifting capacity impacted by specific conditions, including (from priority):

  • Clearance – existence of foreign body (paint, dirt, air) interrupts the magnetic circuit, which reduces capacity rapidly (even by 50% at 0.5 mm).
  • Force direction – catalog parameter refers to pulling vertically. When slipping, the magnet holds significantly lower power (typically approx. 20-30% of maximum force).
  • Steel thickness – too thin steel does not accept the full field, causing part of the flux to be lost into the air.
  • Plate material – low-carbon steel gives the best results. Alloy steels decrease magnetic properties and lifting capacity.
  • Surface structure – the smoother and more polished the plate, the larger the contact zone and stronger the hold. Roughness creates an air distance.
  • Temperature – heating the magnet results in weakening of force. Check the maximum operating temperature for a given model.

* Holding force was tested on the plate surface of 20 mm thickness, when the force acted perpendicularly, however under parallel forces the lifting capacity is smaller. In addition, even a slight gap {between} the magnet’s surface and the plate decreases the holding force.

Precautions when working with NdFeB magnets

Do not underestimate power

Before use, read the rules. Uncontrolled attraction can break the magnet or hurt your hand. Be predictive.

GPS and phone interference

An intense magnetic field interferes with the operation of magnetometers in smartphones and GPS navigation. Maintain magnets close to a device to avoid damaging the sensors.

Electronic hazard

Do not bring magnets near a wallet, computer, or TV. The magnetic field can permanently damage these devices and erase data from cards.

Adults only

Only for adults. Small elements can be swallowed, leading to severe trauma. Keep out of reach of kids and pets.

Maximum temperature

Monitor thermal conditions. Exposing the magnet above 80 degrees Celsius will ruin its magnetic structure and pulling force.

Do not drill into magnets

Powder generated during cutting of magnets is flammable. Avoid drilling into magnets unless you are an expert.

Beware of splinters

Protect your eyes. Magnets can explode upon uncontrolled impact, launching sharp fragments into the air. Wear goggles.

Implant safety

Warning for patients: Powerful magnets disrupt medical devices. Maintain minimum 30 cm distance or ask another person to handle the magnets.

Warning for allergy sufferers

Some people suffer from a contact allergy to nickel, which is the standard coating for neodymium magnets. Frequent touching may cause skin redness. We recommend wear protective gloves.

Physical harm

Large magnets can smash fingers instantly. Do not put your hand between two strong magnets.

Security!

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