Neodymium Tube Magnet

Port: Ningbo or Shanghai, China 
Production Capacity: 500000000PCS/Season
Payment Terms: L/C, T/T, D/P, Western Union, Paypal, Money Gram
Magnetization Direction: Axial/Radial/Multi-Poles Magnetization
Color: Silver
Coating: Nickel
Grade: N35-N52
Shape: Bar
Material: Sintered Neodymium-Iron-Boron
HS Code: 8505111000
Tolerance: +/- 0.05mm
Transport Package: Carton, Wood Case, Anti-Magnetized Package
Sample: Avaliable
OEM: Acceptable
Application: Electronic Products, Speaker Magnets, Industrial Magnets

  • PRODUCT DETAIL

Port: Ningbo or Shanghai, China 
Production Capacity: 500000000PCS/Season
Payment Terms: L/C, T/T, D/P, Western Union, Paypal, Money Gram
Magnetization Direction: Axial/Radial/Multi-Poles Magnetization
Color: Silver
Coating: Nickel
Grade: N35-N52
Shape: Bar
Material: Sintered Neodymium-Iron-Boron
HS Code: 8505111000
Tolerance: +/- 0.05mm
Transport Package: Carton, Wood Case, Anti-Magnetized Package
Sample: Avaliable
OEM: Acceptable
Application: Electronic Products, Speaker Magnets, Industrial Magnets

The tube magnet can be brought to the place where it is needed, and then passed through the bulk material to attract and remove iron particles in the material. This helps prevent particles from contaminating the material, entering downstream machinery and causing damage, and may generate sparks that ignite explosive materials. The tubular magnet can be transported between different positions. It is a good choice for applications where it is impossible or impractical to install a more permanent magnetic separator (such as a water tank). They can also be used for quality checks.
Magnetic separators use high-strength magnets to capture and remove iron particles and parts (sometimes referred to as flow iron) from gravel, sand, powder, particles, wood chips, food, and other solid materials in bulk transportation applications. Prevent iron particles and parts from contaminating the product, entering downstream machinery and causing damage, and may generate sparks, thereby igniting explosive materials. The separator usually uses ceramics or rare earth oxides. staple. Rare earth elements can trap fine iron or weak magnetic materials, such as rust or scale.

China Tube Magnets Manufacturer www.ymagnet.com supplies tube magnets, stock ndfe ring magnets, magnetic tubes, rare earth tube neodymium magnet, super strong separator tube for scientific experiments or for industrial applications.

This product is not a toy and is not to be used by children. This product is to be used for scientific experiments or for industrial applications. This product contains strong Neodymium magnet(s) that can be harmful or fatal if swallowed. Strong Neodymium magnets are fragile, they are brittle and will break or chip if they hit a hard surface or are snagged together. Always use the utmost care when handling Neodymium magnets.

Grade and working temp

Grades

 N35-N52

N35M-N50M

N35H-N48H

N35SH-N45SH

N30UH-N40UH

N30EH-N38EH

WT

80°C/60°C

100°C          

120°C

150°C

180°C

200°C

  • – The grades like N48-N52 could meet your requirement on strong power.
  • – Standard one like N35 or N38 is okay for your normal applications.
  • – If you have requirement on the working temperature, please note it.

Specification of Magnetic Bar 

The magnetic rod is made of high-quality stainless-steel tube and rare earth alloy NdFeB and is made by a special production method. It can be combined on a holder to form a magnetic filter. When the iron-containing substance passes, it is attracted by the force bar, and the iron-containing substance is firmly adsorbed on the pipe wall of the magnetic bar to ensure the integrity of the equipment and the safety of the product.

Magnetic   strength 

Working   Temperature(°C)


Steel tube outside diameter

2500GS

5000GS

6000GS

7000GS

8000GS

10000GS

12000GS

13000GS

Ф6(0.24″)

350°C

Ф8(0.31″)

350°C

 Ф9(0.35″)

350°C

Ф10(0.39″)

350°C

Ф 12(0.47″)

350°C

350°C

Ф16(0.63″)

350°C

350°C

350°C

Ф19 (0.75″)

350°C

350°C

350°C

180°C

Ф20.3(0.80″)

350°C

350°C

350°C

180°C

Ф22 (0.85″)

350°C

350°C

350°C

180°C

180°C

Ф25 (1.00″)

350°C

350°C

350°C

180°C

180°C

180°C

180°C

180°C

Ф32 (1.25″)

350°C

350°C

350°C

180°C

180°C

180°C

180°C

180°C

Ф38 (1.50″)

350°C

350°C

350°C

180°C

180°C

180°C

180°C

180°C

Ф50 (1.75″)

350°C

350°C

350°C

180°C

180°C

180°C

180°C

180°C

Ф63(2.48″)

350°C

350°C

350°C

180°C

180°C

180°C

180°C

180°C

What should I do before I purchasing a magnetic bar?

1. Confirm the shape and size of the magnetic bar: 

Our standard stainless steel pipe is 25 mm. (1 inch) in diameter, the length required by each customer does not exceed 2500 mm.

2. Confirm the gauss of magnetic bar: 2500 Gs or 8000 Gs or 10000Gs or 12000Gs or 13000Gs 14000GS;

3. Confirm the maximum working temperature: 

There are 6 series for customers to choose:

  • N series temperature up to 80°C.
  • M series up to 100°C.
  • H series temperature up to 120°C.
  • The SH series can reach up to 150°C.
  • UH series up to 180°C.
  • EH series up to 200°C.

4. Confirm whether the material is corroded.

5. Confirm that the magnetic tube cover: 316L or 304 stainless steel.

6. Confirm the threaded hole of the solenoid:

  • 1) There are threaded holes on both ends, easy to install.
  • 2) Tap a threaded hole on one end, and perform flat welding on the other end.
  • 3) Both ends are flat welded. 

7. Confirm the quantity of electromagnetic tube: the price of different quantities is different; the price of more quantity is lower.

How does the magnetic filter tube work? 

The magnetic filter rod/filter rod/tube is made of 304 or 316 stainless steel tube, pole plate, end plug, and permanent magnet. The higher the surface Gaussian of the tube, the higher the price. Since permanent magnets are the most expensive parts, we will tell you how unethical companies can reduce the cost of manufacturing electromagnetic tubes with high surface Gauss.

20201212102509 14655 - Neodymium Tube Magnet

Reduce the volume of the magnet

Disadvantages: The surface of the pipe is uneven and easy to break.

Reduce the magnet diameter as shown in the figure below:

What should I know when buying magnetic filter rods/rods/tubes?

The magnetic flux density of the magnetic filter rod/rod/tube composed of extremely small magnets will not decrease by increasing the diameter of the pole plate, which is due to the magnetic flux density test performed around the circumference of the pole plate. 

However, due to the lack of support of the magnet in the tube, the tube wall will collapse in time. 

In addition, since the stress cannot be evenly distributed and concentrated only on the plate, the tube is easily broken around the plate, making the entire tube unusable and contaminating the material in more serious cases.

Use shredded magnets

Disadvantages: The surface Gaussian is not uniform, which is easy to cause an efficiency drop.

Broken and broken magnets are defective.

However, some unethical companies will seal them in tubes anyway, because these defects are indistinguishable from appearance and are also difficult to detect.

20201212102527 69987 - Neodymium Tube Magnet

Use a “secondary magnet”

Disadvantages: The magnetic field of the tube is not uniform and the consistency is poor.

The so-called “secondary magnets” are magnets produced by top manufacturers for top buyers. However, due to various factors, these products are discarded waste products. Since they are still high-performance products, some unethical companies will buy them at discounted prices. 

However, these “secondary magnets” are mostly thin pieces 3 to 10 mm thick. When observed with a magnetic pole observer, these defects will appear on their own, as shown in the following figure:

What should I know when buying magnetic filter rods/rods/tubes? 

In addition, the sources of these “secondary magnets” are inconsistent. Therefore, the performance of the next batch purchased cannot be guaranteed, resulting in poor consistency between batches.

Reduce the thickness of the stainless steel pipe 

Disadvantage: The service life of the solenoid tube is shortened.

SS304 and SS316 stainless steel are commonly used materials for manufacturing magnetic filter rods/rods/tubes. In the market, the thinnest SS304 tube is between 0.45-0.50 mm. If the tube becomes thinner, the life of the tube will be greatly reduced. 

Due to fewer applications and incomplete specifications, the thinnest SS316 tube is found to be between 0.75-0.80mm. This is also the reason why the surface Gaussian of the magnetic filter rod/bar/tube made of SS316 is lower than that of the tube made of SS304.

If the mass production needs to be stable, the company can produce a 0.5mm thick SS316 pipe (the minimum order quantity is 500kg). However, some unscrupulous companies will manufacture solenoid tubes with a thickness of only 0.3mm, allowing the use of weaker magnets to achieve higher surface, Gauss. 

How the above method unethically reduces the cost of magnetic separation. Please be careful when purchasing magnetic filter rod/rod/tube products.

What are the characteristics of the magnet?

Before the magnets bar test, let’s first understand these terms:

  • 1) Magnetic flux: Set in a uniform magnetic field with a magnetic flux density of B, there is a plane with an area S and perpendicular to the direction of the magnetic field. The product of the magnetic flux density B and the area S is called the magnetic flux passing through this plane. Referred to as Magnetic Flux. Scalar, symbol “Φ”. Simply put: “Use the magnetic field density to measure the strength of the magnetic field”.
  • 2) Gauss: is the unit of measurement of magnetic flux, which refers to the number of magnetic lines of force passing through each square centimeter. A Gauss meter is usually used to measure the strength of the magnetic rod. 
  • 3) Tesla: It is the derived unit of the international system of magnetic flux density or magnetic induction, usually expressed by T. At the International Metrology Conference held in Paris in 1960, this unit was named in memory of Nikola Tesla, an American Serbian inventor, mechanical engineer, and electrical engineer who made important contributions to the field of electromagnetics. The familiar Tesla cars are named after this Tesla background. The conversion formula of Tesla and Gauss is: 1 Tesla = 10000 Gauss.
  • 4) Magnetic Gradient: The rate of change of magnetic field strength or the rate of change of magnetic field density within a unit distance (for example, 1 cm). The degree of inhomogeneity of the magnetic field can be measured by the magnetic field gradient. As shown in the figure below, the distribution of magnetic field lines in a uniform magnetic field is uniform, but the distribution of magnetic field lines in an uneven magnetic field is not uniform. The larger the magnetic gradient, the easier it is to adsorb.
  • 5) Pull Force: The adsorption force of a ferromagnetic object in a magnetic field is usually expressed in kg or Newton as the unit of magnetic force. Usually use a tensile tester to test.
  • 6) Magnet coercive force: Also known as coercivity or coercivity, it is one of the characteristics of magnetic materials and refers to the magnetic field strength required to reduce the magnetization to zero after the magnetic material has been magnetized to magnetic saturation. Coercivity represents the ability of a magnetic material to resist demagnetization. It will be represented by the symbol of HC, and the unit is A/m (international standard system) or Oe (gauss unit system).

The coercivity can be measured with a magnetometer or B-H analyzer (such as FE-2100H permanent magnet material measuring device). If the coercivity is large, it is called hard magnetism and can be used as a permanent magnet material. Permanent magnets can be used in motors, magnetic storage media (such as hard drives, diskettes or tapes), and strong magnetic rods. Ferromagnetic materials with low coercivity are called soft magnetism and can be used in the iron cores of transformers and inductors, and read/write heads of magnetic storage media.

Summary
20201212182047 - Neodymium Tube Magnet
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Brand Name
Actility
Product Name
Neodymium Tube Magnet
Price
USD 0.1-9999
Product Availability
Pre-Order Only
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