Big Ring Magnets

Big Ring Magnets

Big ring magnets Product Detail: Specifications: Neodymium Magnet/NdFeB Magnet 1.Precise dimension 2.Various shape 3.Stable performance 4.Good corrosion resistance Big ring magnets/big round magnets/custom cast NdFeB magnet Directions of Magnetization a. Thickness Magnetized b. Axially...

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Product Details

Big ring magnets

Product Detail:

Means of Transport:Ocean,Land,Air

Production Capacity:10000

Packing:carton

Delivery Date:25

Application:Industrial Magnet

Shape:ring

Type:Permanent

Composite:NdFeB Magnet

Brand Name:HONY

Tolerance:+/-0.05mm

Size:Various

Coating Thickness:10-15

Ring magnets for sale:Strong magnet

Working temperature:High up to 200℃

Grade:N,M,H,SH,UH,EH



Specifications:
Neodymium Magnet/NdFeB Magnet
1.Precise dimension
2.Various shape
3.Stable performance
4.Good corrosion resistance


Big ring magnets/big round magnets/custom cast NdFeB magnet

Directions of Magnetization

a. Thickness Magnetized

b. Axially Magnetized

c. Diametrally Magnetized

d. Multi-poles magnetized

e. Radial Magnetized

f. Customized specific requirements magnetized


1. Materials

Sintered Neodymium-Iron-Boron

2. Grades

Range: N35-N52; N35M-N50M; N35H-N48H, N35SH-N45SH; N30UH-N40UH,N30EH-N38EH

-The grade like N48-N52 could meet your requirements on strong power

-Standard one like N35 or N40 is okay for your normal applications

3. Shapes

Others available: Block, Ring, Cylinder, Disc, Customized shape as your design.

4. Size

Length x Width x Thickness You could choose freely according to your plan.

5. Coatings

Others available: Nickel, Zinc, Gold, Silver, Epoxy, Parylene, etc.

6. Orientation

Through the direction of thickness or according to your needs.

7. Quality

Our expert quality control department ensures magnets are high quality.

8. Applications

Sensors, motors, rotors, wind turbine,wind generators, etc


Big ring magnets/big round magnets/custom cast NdFeB magnet

Magnet Information

Description

Sintered NdFeB Magnet

Material: 

Neodymium-Iron-Boron

Shape:

Ring, Thin-wall ring, Disc, Cylinder, Segment,Contersunk, Tapezoid, Irregular Shape…With special shape requirement, we have own R & D dept. to support

Coating:

Ni-Cu-Ni, Nickel, Zn, Gold, Cr, Silver, Copper, Anti-Rust Oil, Spray Rolling, Black, Grey Epoxy, PTFE, Parylene, and so on.

Magnetic Performance Sheet

Grade

Remanence(Br)

Coercivity(BH)
max kJ/m3

 Temperature

mT

KJ/M3

 (Tw°C)

(kGs)

MGOe

 

N35-N52

1170-1480

263-422

80 °C

(10.3-14.8)

(33-53)

35M-50M

1080-1450

263-406

100 °C

(10.8-14.5)

(33-51)

35H-48H

1170-1430

(263-390)

120 °C

(11.7-14.3)

(33-49)

35SH-45SH

1130-1380

247-366

150 °C

(11.3-13.8)

(33-46)

30UH-40UH

1080-1280

263-326

180 °C

(10.8-12.8)

(33-41)

30EH-38EH

1080-1250

223-310

200 °C

(10.8-12.5)

(28-39)

Magnet Coating

Coating

Thickness  (Microns)

Color

Resistance 

Anti-Rust Oil

1

Trancparency

Temporary Protection

Spray Rolling

10-30

Common Black

24 hours of salt spray test

Zinc

5-10

Bright Blue

24 hours of salt spray test

Nickle

10-15

Bright Silver

48 hours of salt spray test

Ni+Cu

10-20

Gold

Temporary Protection

Ni+Cu+Epoxy

15-30

Grey, Black

Excellent Against Humidity & Salt Spray

Epoxy

15-25

Grey, Black

72 hours of salt spray test

Parylene

 10-30

Trancparency

200 hours of Salt Spray. Superior Against Solvents, Gases, Fungi and Bacteria


Big ring magnets/big round magnets/custom cast NdFeB magnet

Delivery:

All available shipping ways could be applied, by courier, by air or by sea.

Appointed shipping company or our own forwarders all could be used in shipment.

Full-way tracking the cargos for you before the goods arrive.


Buyer's Guide:

In order to quote you the best price quickly, please provide the following information:

1.Product size,grade,coating,etc.

2.Order quantity;

3.Attached the drawings if customized
4.Any special packing or other requirements


Our advantage:

1. Fast reply: all your enquiry will be replied within 24 hours;

2. Reasonable price: we are direct manufacturer and able to offer better price;

3. Good quality: we are experienced in quality control;

4. Fast delivery time:7-20 days


FAQ:

1. What are neodymium magnets? Are they the same as "rare earth"?

Neodymium magnets are a member of the rare earth magnet family. They are called "rare earth" because neodymium is a member of the "rare earth" elements on the periodic table. Neodymium magnets are the strongest of the rare earth magnets and are the strongest permanent magnets in the world.


2. What are neodymium magnets made from and how are they made?

Neodymium magnets are actually composed of neodymium, iron and boron (they are also referred to as NIB or NdFeB magnets).  The powdered mixture is pressed under great pressure into molds.  The material is then sintered (heated under a vacuum), cooled, and then ground or sliced into the desired shape.  Coatings are then applied if required.  Finally, the blank magnets are magnetized by exposing them to a very powerful magnetic field in excess of 30 KOe.


3. How is the strength of a magnet measured?

Gaussmeters are used to measure the magnetic field density at the surface of the magnet. This is referred to as the surface field and is measured in Gauss (or Tesla).  Pull Force Testers are used to test the holding force of a magnet that is in contact with a flat steel plate. Pull forces are measured in pounds (or kilograms).


4. What does the "N rating", or grade, of the neodymium magnets mean?

The grade, or "N rating" of the magnet refers to the Maximum Energy Product of the material that the magnet is made from.  It refers to the maximum strength that the material can be magnetized to.  The grade of neodymium magnets is generally measured in units millions of Gauss Oersted (MGOe).  A magnet of grade N42 has a Maximum Energy Product of 42 MGOe.  Generally speaking, the higher the grade, the stronger the magnet.


5. What is the difference between the different platings and coatings?

Choosing different coatings does not affect the magnetic strength or performance of the magnet, except for our Plastic and Rubber Coated Magnets.  The preferred coating is dictated by preference or intended application. More detailed specifications can be found on our Specs page.

♦ Nickel is the most common choice for plating neodymium magnets. It is actually a triple  plating of nickel-copper-nickel. It has a shiny silver finish and has good resistance to corrosion in many applications. It is not waterproof.

♦ Black nickel has a shiny appearance in a charcoal or gunmetal color. A black dye is added to the final nickel plating

process of the triple plating of nickelcopperblack nickel.

NOTE: It does not appear completely black like epoxy coatings. It is also still shiny, much like plain nickel plated magnets.

♦ Zinc has a dull gray/bluish finish, that is more susceptible to corrosion than nickel. Zinc can leave a black residue on hands and other items.

♦ Epoxy is basically a plastic coating that is more corrosion resistant as long as the coating is intact. It is easily scratched. From our experience, it is the least durable of the available coatings.

♦ Gold plating is applied over the top of standard nickel plating. Gold plated magnets have the same characteristics as nickel plated ones, but with a gold finish



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