Magnetic roller SM 32x275 [2xM8] / N42

← previous

Product available shipping tomorrow!

SM 32x275 [2xM8] / N42 - magnetic roller

magnetic separator

catalog number 130376

GTIN: 5906301813248

no reviews

diameter Ø

32 mm [±0,1 mm]

height

275 mm [±0,1 mm]

max. temperature

≤ 80 °C

824.10 ZŁ gross price (including VAT) / pcs +

670.00 ZŁ net price + 23% VAT / pcs

bulk discounts:

need more quantity?

price from 1 pcs

670.00 ZŁ

824.10 ZŁ

price from 4 pcs

636.50 ZŁ

782.89 ZŁ

price from 7 pcs

603.00 ZŁ

741.69 ZŁ

Do you have doubts?

Give us a call tel: +48 888 99 98 98 or contact us through form on our website. You can check the strength and the appearance of neodymium magnets in our force calculator power calculator

Orders placed by 2:00 PM will be shipped on the same business day.

Specification: magnetic separator 32x275 [2xM8] / N42

Characteristics: magnetic separator 32x275 [2xM8] / N42

Properties

Values

catalog number

130376

GTIN

5906301813248

production / distribution

Dhit sp. z o.o.

country of origin

Poland / China / Germany

customs code

85059029

diameter Ø

32 mm [±0,1 mm]

height

275 mm [±0,1 mm]

max. temperature ?

≤ 80 °C

weight

1475.00 g

execution tolerance

± 0.1 mm

rodzaj materiału

AISI 304 - bezpieczna dla żywności

rodzaj magnesów

NdFeB N42

ilość gwintów

2x [M8] wewnętrzne

biegunowość

obwodowa - 10 nadbiegunników

indukcja magnetyczna

~ 8 000 Gauss [±5%]

max. temp. pracy

poniżej ≤ 80°C

grubość rury osłonowej

1 mm

Magnetic properties of the material N42

material characteristics N42

Properties

Values

units

remenance Br [Min. - Max.] ?

12.9-13.2

kGs

remenance Br [Min. - Max.] ?

1290-1320

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

Properties

Values

units

Vickers hardness

≥550

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

The magnetic separator, namely the magnetic roller, uses the power of neodymium magnets, which are welded in a casing made of stainless steel mostly AISI304. In this way, it is possible to efficiently separate ferromagnetic elements from the mixture. A fundamental component of its operation is the repulsion of magnetic poles N and S, which causes magnetic substances to be attracted. The thickness of the magnet and its structure's pitch determine the range and strength of the separator's operation.

Generally speaking, magnetic separators are designed to separate ferromagnetic elements. If the cans are ferromagnetic, the separator will effectively segregate them. However, if the cans are made of non-ferromagnetic materials, such as aluminum, the separator will not effectively segregate them.

Yes, magnetic rollers are employed in food production for the elimination of metallic contaminants, such as iron fragments or iron dust. Our rods are built from acid-resistant steel, AISI 304, intended for contact with food.

Magnetic rollers, often called magnetic separators, are used in food production, metal separation as well as recycling. They help in removing iron dust during the process of separating metals from other materials.

Our magnetic rollers consist of neodymium magnets embedded in a stainless steel tube cylinder made of stainless steel with a wall thickness of 1mm.

From both sides of the magnetic bar will be with M8 threaded holes - 18 mm, enabling simple mounting in machines or magnetic filter drawers. A "blind" version is also possible in manual separators.

In terms of magnetic properties, magnetic bars differ in terms of flux density, magnetic force lines and the field of the magnetic field. We produce them in two materials, N42 as well as N52.

Often it is believed that the greater the magnet's power, the better. But, the effectiveness of the magnet's power depends on the height of the used magnet and the quality of the material [N42] or [N52], as well as on the area of application and anticipated needs. The standard operating temperature of a magnetic bar is 80°C.

If the magnet is more flat, the magnetic force lines will be more compressed. On the other hand, when the magnet is thick, the force lines are longer and reach further.

For making the casings of magnetic separators - rollers, frequently stainless steel is used, particularly types AISI 304, AISI 316, and AISI 316L.

In a saltwater environment, AISI 316 steel is recommended thanks to its excellent corrosion resistance.

Magnetic bars stand out for their specific arrangement of poles and their ability to attract magnetic particles directly onto their surface, in contrast to other separators that often use complex filtration systems.

Technical designations and terms related to magnetic separators comprise among others magnet pitch, polarity, and magnetic induction, as well as the steel type applied.

Magnetic induction for a magnet on a roller is determined using a teslameter or a gaussmeter with a flat Hall-effect probe, aiming to find the highest magnetic field value near the magnetic pole. The result is verified in a value table - the lowest is N30. All designations below N27 or N25 suggest recycling that doesn't meet the standard - they are not suitable.

Neodymium magnetic rollers offer a range of benefits such as a very strong magnetic field, the ability to capture even the tiniest metal particles, and durability. Disadvantages may include the need for regular cleaning, higher cost, and potential installation challenges.

To properly maintain of neodymium magnetic rollers, it’s worth washing after each use, avoiding temperatures up to 80°C. The rollers our rollers have waterproofing IP67, so if they are not sealed, the magnets inside can oxidize and lose their power. Testing of the rollers is recommended be carried out every two years. Caution should be taken during use, as it’s possible getting pinched. If the protective tube is only 0.5 mm thick, it may wear out, which in turn could lead to problems with the magnetic rod seal and product contamination. The effective range of the roller is equal to its diameter: fi25mm gives an active range of about 25mm, while fi32 gives an active range of about 40mm.

A magnetic roller is a magnetic separator made from a neodymium magnet enclosed in a cylindrical stainless steel housing, which are used to remove metal contaminants from bulk and granular materials. They are applied in industries such as food processing, ceramics, and recycling, where metal separation is crucial.

Choose recommended products

Product available shipping tomorrow! Bestseller

lamellar magnet 3x3x3 / N38 ↑ axial

0.16 ZŁ / pcs

Product available shipping tomorrow!

cylindrical magnet 45x15 / N38 ↑ axial

49.00 ZŁ / pcs

Product available shipping tomorrow!

magnetic separator with handle 25x175 / N52

492.00 ZŁ / pcs

Product available shipping tomorrow!

lamellar magnet 40x7x3 / N38 ↑ axial

2.45 ZŁ / pcs

Advantages and disadvantages of neodymium magnets NdFeB.

Apart from immense power, neodymium magnets have the following advantages:

They do not lose strength over time - after approximately 10 years, their power decreases by only ~1% (theoretically),
They are exceptionally resistant to demagnetization caused by an external magnetic field,
In other words, thanks to the shiny coating of nickel, gold, or silver, the element acquires an aesthetic appearance,
They exhibit very high magnetic induction on the surface of the magnet,
By using an appropriate combination of materials, they can achieve significant thermal resistance, allowing them to operate at temperatures up to 230°C and above...
Due to the option of accurate forming or adaptation to individual needs – neodymium magnets can be produced in many variants of shapes and sizes, which amplifies their universality in usage.
Significant importance in advanced technologically fields – are utilized in hard drives, electric drive mechanisms, medical devices and very modern machines.

Disadvantages of neodymium magnets:

They are prone to breaking as they are extremely fragile when subjected to a strong impact. If the magnets are exposed to impacts, it is suggested using magnets in a steel housing. The steel housing in the form of a holder protects the magnet from impacts and simultaneously increases its overall strength,
They lose strength at high temperatures. Most neodymium magnets experience permanent loss of strength when heated above 80°C (depending on the form and height). However, we also offer special magnets with high temperature resistance, up to 230°C,
They rust in a humid environment - during outdoor use, we recommend using waterproof magnets, such as those made of rubber or plastic,
The use of a cover or a magnetic holder is recommended due to the limited possibilities of manufacturing threads or complex shapes in the magnet
Potential hazard to health from tiny fragments of magnets can be dangerous, if swallowed, which is crucial in the aspect of protecting young children. Furthermore, small elements of these magnets can complicate diagnosis in case of swallowing.

Handle Neodymium Magnets Carefully

Neodymium magnets can demagnetize at high temperatures.

Under specific conditions, Neodymium magnets may experience demagnetization when subjected to high temperatures.

Neodymium magnets are the most powerful, most remarkable magnets on earth, and the surprising force between them can surprise you at first.

Make sure to review all the information we have provided. This will help you avoid harm to your body and damage to the magnets.

Dust and powder from neodymium magnets are highly flammable.

Do not attempt to drill into neodymium magnets. Mechanical processing is also not recommended. If the magnet is crushed into fine powder or dust, it becomes highly flammable.

Neodymium magnets can attract to each other due to their immense internal force, causing the skin and other body parts to get pinched and resulting in significant injuries.

If you have a finger between or alternatively on the path of attracting magnets, there may be a serious cut or even a fracture.

Keep neodymium magnets away from the wallet, computer, and TV.

The strong magnetic field generated by neodymium magnets can destroy magnetic media such as floppy disks, video tapes, HDDs, credit cards, magnetic ID cards, cassette tapes, etc. devices. They can also destroy devices like video players, televisions, CRT computer monitors. Remember not to place neodymium magnets close to these electronic devices.

Neodymium magnets are not recommended for people with pacemakers.

Neodymium magnets generate strong magnetic fields. As a result, they interfere with the operation of a pacemaker. This is because many of these devices are equipped with a function that deactivates the device in a magnetic field.

Neodymium magnets are fragile as well as can easily break and get damaged.

Neodymium magnets are highly delicate, and by joining them in an uncontrolled manner, they will crack. Magnets made of neodymium are made of metal and coated with a shiny nickel, but they are not as durable as steel. At the moment of connection between the magnets, sharp metal fragments can be dispersed in different directions.

Neodymium magnets should not be around children.

Neodymium magnets are not toys. Be cautious and make sure no child plays with them. In the case of swallowing multiple magnets simultaneously, they can attract to each other through the intestinal walls. In the worst case scenario, this can lead to death.

Under no circumstances should neodymium magnets be brought close to GPS and smartphones.

Strong fields generated by neodymium magnets interfere with compasses and magnetometers used in navigation, as well as internal compasses of smartphones and GPS devices.

The magnet is coated with nickel - be careful if you have an allergy.

Studies show a small percentage of people have allergies to certain metals, including nickel. An allergic reaction often manifests as skin redness and rash. If you have a nickel allergy, you can try wearing gloves or simply avoid direct contact with nickel-plated neodymium magnets.

So that know how strong neodymium magnets are and why they are so dangerous, read the article - Dangerous very powerful neodymium magnets.

SM 32x275 [2xM8] / N42 - magnetic roller

magnetic separator

Specification: magnetic separator 32x275 [2xM8] / N42

Magnetic properties of the material N42

Physical properties of sintered neodymium magnets Nd2Fe14B

Choose recommended products

lamellar magnet 3x3x3 / N38 ↑ axial

cylindrical magnet 45x15 / N38 ↑ axial

magnetic separator with handle 25x175 / N52

lamellar magnet 40x7x3 / N38 ↑ axial

Advantages and disadvantages of neodymium magnets NdFeB.

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B