products

Permanent Round NdFeB Disc Magnet For Magnetic Speaker / Headphone / Therapy

Basic Information
Place of Origin: Nanjing
Brand Name: Huajin Magnet
Certification: SGS, ROHS
Model Number: HJ-137
Minimum Order Quantity: 100PCS
Price: USD 0.05~0.20 PC
Packaging Details: Carton(36*27*15cm)
Delivery Time: 7-9 days
Payment Terms: T/T, Western Union, Paypal, , L/C
Supply Ability: 1000000PCS/Month
Detail Information
Raw Material: Neodymium Iron Boron Performance: N35-N52
Coating: Zinc&Nickel&Color Zinc Shape: Round / Disc / Disk / Circle
Specification: Make As Customers Requested WorkableTemp.: 176°F / 176°F~392°F
Lead Time: 7-9 Days Payment Term: T/T, L/C, PayPal, Western Union
Trade Term: EXW, FOB, F&C, FCR, CIF, Ect.

Product Description

Permanent Neodymium Disc Round Magnet For Magnetic Speaker /Headphone /Therapy

 

Permanent magnets

Permanent magnets are materials where the magnetic field is generated by the internal structure of the material itself. Inside atoms and crystals you have both electrons and the nucleus of the atom. Both the nucleus and the electrons themselves act like little magnets, like little spinning chunks of electric charge, and they have magnetic fields inherent in the particles themselves. There's also a magnetic field that's generated by the orbits of the electrons as they move about the nucleus. So the magnetic fields of permanent magnets are the sums of the nuclear spins, the electron spins and the orbits of the electrons themselves. Permanent magnets are limited by the structure of the material. And the strongest magnetic field of a permanent magnet is about 8,000 gauss. The strongest magnets here at the Magnet Lab are 450,000 gauss, which would be almost 50 times stronger than that.

 

Advantages of Sintered Magnet

One of the most important features of an electromagnet is the ability to change its magnetic force. When no electric current flows through the magnet’s wires, it has no magnetic force. Put a little current in the magnet, and it has a small force. A large current gives the magnet a bigger force, able to lift or pull heavier objects. The ability to turn magnetic force on and off has many important uses, ranging from simple household gadgets to giant industrial machines.

The pulling power of a permanent magnet is limited to the type of metal from which it’s made. Currently, the strongest permanent magnets are made of a combination of iron and a metal called neodymium. Although these permanent magnets are strong, the best electromagnets are more than 20 times stronger.

ly:Arial;mso-bidi-font-family:Arial;line-height:150%; color:rgb(0,0,0);letter-spacing:0.0000pt;text-transform:none; font-style:normal;font-size:12.0000pt;mso-font-kerning:0.0000pt;" > 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.

 

Product Discription:

Item Disc Round Magnet
Composition Neodymium Magnet
Application Voice-coil Motor(VCM), MRI, Generator, Car, Speaker, Computer
Working Temperature <80℃ (176°F) / 80ºC (176°F) ~ 200ºC (392°F)
Coating Zinc, Color Zinc, Nickel etc
Grade N35-N52, 38M-48M, 35H-48H, 33SH-44SH, 30UH-35UH
Dimension Customized size
Magnetism Direction Through thickness(Axially)+Radially
Type Strong&Permanent
Performance Permanent, Strong, Rust-proof, Anti-corrosion
Trade Term EXW, FOB, CIF, C&F ect.
Payment Term TT, PayPal, Western Union ect.

 

 

Permanent Round NdFeB Disc Magnet For Magnetic Speaker / Headphone / Therapy

Permanent Round NdFeB Disc Magnet For Magnetic Speaker / Headphone / TherapyPermanent Round NdFeB Disc Magnet For Magnetic Speaker / Headphone / Therapy

 

Our CompanyOur Company
We are a small business that has been a long time in the making. We have worked for both large and small businesses over the years, where we have learned a lot about business - both what to do - and what not to do. We have found that good business boils down to providing excellent customer service. Without you, the customer, we have no business, so we will do everything in our power to make sure that you are satisfied with your order and service from Nanjing Huajin Magnet.

 

Grade Remanence Coercivity Force Intrinsic Coercive Force Max. Energy Product Working Temp.
  Br Hcb Hcj (BH)max  
mT kGs kA/m kOe kA/m kOe kJ/m3 MGOe
N35 1170-1220 11.7-12.2 ≥ 868 ≥ 10.9 ≥ 955 ≥ 12 263-287 33-36 80 ° C
N38 1220-1250 12.2-12.5 ≥ 899 ≥ 11.3 ≥ 955 ≥ 12 287-310 36-39 80 ° C
N40 1250-1280 12.5-12.8 ≥ 907 ≥ 11.4 ≥ 955 ≥ 12 302-326 38-41 80 ° C
N42 1280-1320 12.8-13.2 ≥ 915 ≥ 11.5 ≥ 955 ≥ 12 318-342 40-43 80 ° C
N45 1320-1380 13.2-13.8 ≥ 923 ≥ 11.6 ≥ 955 ≥ 12 342-366 43-46 80 ° C
N48 1380-1420 13.8-14.2 ≥ 923 ≥ 11.6 ≥ 876 ≥ 12 366-390 46-49 80 ° C
N50 1400-1450 14.0-14.5 ≥ 796 ≥ 10.0 ≥ 876 ≥ 11 382-406 48-51 60 ° C
N52 1430-1480 14.3-14.8 ≥ 796 ≥ 10.0 ≥ 876 ≥ 11 398-422 50-53 60 ° C
35M 1170-1220 11.7-12.2 ≥ 868 ≥ 10.9 ≥ 1114 ≥ 14 263-287 33-36 100 ° C
38M 1220-1250 12.2-12.5 ≥ 899 ≥ 11.3 ≥ 1114 ≥ 14 287-310 36-39 100 ° C
40M 1250-1280 12.5-12.8 ≥ 923 ≥ 11.6 ≥ 1114 ≥ 14 302-326 38-41 100 ° C
42M 1280-1320 12.8-13.2 ≥ 955 ≥ 12.0 ≥ 1114 ≥ 14 318-342 40-43 100 ° C
45M 1320-1380 13.2-13.8 ≥ 995 ≥ 12.5 ≥ 1114 ≥ 14 342-366 43-46 100 ° C
48M 1360-1430 13.6-14.3 ≥ 1027 ≥ 12.9 ≥ 1114 ≥ 14 366-390 46-49 100 ° C
50M 1400-1450 14.0-14.5 ≥ 1033 ≥ 13.0 ≥ 1114 ≥ 14 382-406 48-51 100 ° C
35H 1170-1220 11.7-12.2 ≥ 868 ≥ 10.9 ≥ 1353 ≥ 17 263-287 33-36 120 ° C
38H 1220-1250 12.2-12.5 ≥ 899 ≥ 11.3 ≥ 1353 ≥ 17 287-310 36-39 120 ° C
40H 1250-1280 12.5-12.8 ≥ 923 ≥ 11.6 ≥ 1353 ≥ 17 302-326 38-41 120 ° C
42H 1280-1320 12.8-13.2 ≥ 955 ≥ 12.0 ≥ 1353 ≥ 17 318-342 40-43 120 ° C
45H 1300-1360 13-13.6 ≥ 963 ≥ 12.1 ≥ 1353 ≥ 17 326-358 43-46 120 ° C
48H 1370-1430 13.7-14.3 ≥ 995 ≥ 12.5 ≥ 1353 ≥ 17 366-390 46-49 120 ° C
33SH 1130-1170 11.3-11.7 ≥ 844 ≥ 10.6 ≥ 1592 ≥ 20 247-271 31-34 150 ° C
35SH 1170-1220 11.7-12.2 ≥ 876 ≥ 11.0 ≥ 1592 ≥ 20 263-287 33-36 150 ° C
38SH 1220-1250 12.2-12.5 ≥ 907 ≥ 11.4 ≥ 1592 ≥ 20 287-310 36-39 150 ° C
40SH 1240-1280 12.5-12.8 ≥ 939 ≥ 11.8 ≥ 1592 ≥ 20 302-326 38-41 150 ° C
42SH 1280-1320 12.8-13.2 ≥ 987 ≥ 12.4 ≥ 1592 ≥ 20 318-342 40-43 150 ° C
45SH 1320-1380 13.2-13.8 ≥ 1003 ≥ 12.6 ≥ 1592 ≥ 20 342-366 43-46 150 ° C
30UH 1080-1130 10.8-11.3 ≥ 812 ≥ 10.2 ≥ 1990 ≥ 25 223-247 28-31 180 ° C
33UH 1130-1170 11.3-11.7 ≥ 852 ≥ 10.7 ≥ 1990 ≥ 25 247-271 31-34 180 ° C
35UH 1180-1220 11.8-12.2 ≥ 860 ≥ 10.8 ≥ 1990 ≥ 25 263-287 33-36 180 ° C
38UH 1220-1250 12.2-12.5 ≥ 876 ≥ 11.0 ≥ 1990 ≥ 25 287-310 36-39 180 ° C
40UH 1240-1280 12.5-12.8 ≥ 899 ≥ 11.3 ≥ 1990 ≥ 25 302-326 38-41

180 ° C

 

Strength:

If you've never handled neodymium magnets before, you will be amazed at their strength. Neodymium magnets are over 10x stronger than the strongest ceramic magnets. If you are currently using ceramic magnets in your project, you could probably use a much smaller neodymium magnet and have greater holding force.

 

The production process:

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.

 

Payment Term:
T/T, L/C, Western Union, PayPal.

Package & Shipment:

1. By Express(DHL, FedEx, TNT, UPS ect): Door to door, Short Delivery time, 3-5 days.
2. By Air: Short Delivery Time, 3-7 days.
3. By Sea: Cheap Shipping Cost, 7-35 days.

 

Package:
Package: Magnetic Isolation Package
Carton: 36*27*15CM

 

Please feel free to contact me for any questions and requiries.

Contact Details
Emma

Phone Number : 18951847369

WhatsApp : +8618951847369