Hot Sale NdFeB Ring Speaker Magnets

Model NO.: SDMNR
Certification: ISO9001:2008, ISO/Ts16949:2009, RoHS
Other Coating: Ni, Ni-Cu-Ni, Zn(Cr3+), Tin, Epoxy, Ni-AG, Ni-Au
Delivery Detail: 7 Days After Order Confirmed
Export Markets: Global
OEM Service: Yes
Trademark: SDM
Transport Package: Sea Pallet / Air Carton / Express Packaging
Specification: MMPA
Origin: China (Mainland)
HS Code: 8505111000
Large Size Certificated Ring Neodymium Magnet

NdFeB magnet offer the strongest magnetic power today. They are particularly suitable for high volume production in a wide variety of shape and size. Precise dimensional control is achieved in machining processes.

1. Applications: Motors, Generators, Sensors, Speakers, Earphones and other musical instruments, Magnetic therapy devices, Magnetic Chuck, Magnetic bearings and couplings, NdFeB Pot Magnet and other magnetic applications.

2. Grade: N35-N52, N35M-N50M, N35H-N48H, N35SH-N45SH, N28UH-N42UH, N28EH-N40EH, N28AH-N38AH.

3. Shape: Arc, Customized Design.

4. Coating: Ni, Ni-Cu-Ni, Zn(Cr3+), Tin, Epoxy, Ni-Ag, Ni-Au, Passivation, Parylene, etc.

5. Size: Customized size per your requirements.

6. Certification: ISO9001: 2008, ISO/TS16949: 2009 and RoHS.
/ Sintered NdFeB Magnet
Grade                     
 Residual Induction (Br) Coercive Force      (Hcb) Intrinsic Coercive Force (Hcj) Max Energy Product (BH)max  Temp. Coefficient              Tk Max Working Temp.  Curie Temp.
T kGs kA/m kOe kA/m kOe kJ/m³ MGOe %/ºC(Br) %/ºC(Hcj) ºC ºC
N35 1.17-1.22 11.7-12.2 ≥868 ≥10.9 ≥955 ≥12 263-287 33-36 -0.12 -0.70 80 310
N38 1.22-1.25 12.2-12.5 ≥899 ≥11.3 ≥955 ≥12 287-310 36-39 -0.12 -0.70 80 310
N40 1.25-1.28 12.5-12.8 ≥907 ≥11.4 ≥955 ≥12 302-326 38-41 -0.12 -0.70 80 310
N42 1.28-1.32 12.8-13.2 ≥915 ≥11.5 ≥955 ≥12 318-342 40-43 -0.12 -0.70 80 310
N45 1.32-1.38 13.2-13.8 ≥923 ≥11.6 ≥955 ≥12 342-366 43-46 -0.12 -0.70 80 310
N48 1.38-1.42 13.8-14.2 ≥923 ≥11.6 ≥955 ≥12 366-390 46-49 -0.12 -0.70 80 310
N50 1.40-1.45 14.0-14.5 ≥796 ≥10.0 ≥876 ≥11 382-406 48-51 -0.12 -0.70 60 310
N52 1.43-1.48 14.3-14.8 ≥796 ≥10.0 ≥876 ≥11 398-422 50-53 -0.12 -0.70 60 310
N35M 1.17-1.22 11.7-12.2 ≥868 ≥10.9 ≥1114 ≥14 263-287 33-36 -0.12 -0.70 100 310
N38M 1.22-1.25 12.2-12.5 ≥899 ≥11.3 ≥1114 ≥14 287-310 36-39 -0.12 -0.70 100 310
N40M 1.25-1.28 12.5-12.8 ≥923 ≥11.6 ≥1114 ≥14 302-326 38-41 -0.12 -0.70 100 310
N42M 1.28-1.32 12.8-13.2 ≥955 ≥12.0 ≥1114 ≥14 318-342 40-43 -0.12 -0.70 100 310
N45M 1.32-1.38 13.2-13.8 ≥995 ≥12.5 ≥1114 ≥14 342-366 43-46 -0.12 -0.70 100 310
N48M 1.37-1.43 13.7-14.3 ≥1027 ≥12.9 ≥1114 ≥14 366-390 46-49 -0.12 -0.70 100 310
N50M 1.40-1.45 14.0-14.5 ≥1033 ≥13 ≥1114 ≥14 382-406 48-51 -0.12 -0.70 100 310
N35H 1.17-1.22 11.7-12.2 ≥868 ≥10.9 ≥1353 ≥17 263-287 33-36 -0.12 -0.70 120 310
N38H 1.22-1.25 12.2-12.5 ≥899 ≥11.3 ≥1353 ≥17 287-310 36-39 -0.12 -0.70 120 310
N40H 1.25-1.28 12.5-12.8 ≥923 ≥11.6 ≥1353 ≥17 302-326 38-41 -0.12 -0.70 120 310
N42H 1.28-1.32 12.8-13.2 ≥955 ≥12.0 ≥1353 ≥17 318-342 40-43 -0.12 -0.70 120 310
N45H 1.32-1.36 13.2-13.6 ≥963 ≥12.1 ≥1353 ≥17 342-366 43-46 -0.12 -0.70 120 310
N48H 1.37-1.43 13.7-14.3 ≥995 ≥12.5 ≥1353 ≥17 366-390 46-49 -0.12 -0.70 120 310
N35SH 1.17-1.22 11.7-12.2 ≥876 ≥11.0 ≥1592 ≥20 263-287 33-36 -0.11 -0.65 150 320
N38SH 1.22-1.25 12.2-12.5 ≥907 ≥11.4 ≥1592 ≥20 287-310 36-39 -0.11 -0.65 150 320
N40SH 1.25-1.28 12.5-12.8 ≥939 ≥11.8 ≥1592 ≥20 302-326 38-41 -0.11 -0.65 150 320
N42SH 1.28-1.32 12.8-13.2 ≥987 ≥12.4 ≥1592 ≥20 318-342 40-43 -0.11 -0.65 150 320
N45SH 1.32-1.38 13.2-13.8 ≥1003 ≥12.6 ≥1592 ≥20 342-366 43-46 -0.11 -0.65 150 320
N28UH 1.04-1.08 10.4-10.8 ≥764 ≥9.6 ≥1990 ≥25 207-231 26-29 -0.11 -0.60 180 330
N30UH 1.08-1.13 10.8-11.3 ≥812 ≥10.2 ≥1990 ≥25 223-247 28-31 -0.11 -0.60 180 330
N33UH 1.13-1.17 11.3-11.7 ≥852 ≥10.7 ≥1990 ≥25 247-271 31-34 -0.11 -0.60 180 330
N35UH 1.17-1.22 11.7-12.2 ≥860 ≥10.8 ≥1990 ≥25 263-287 33-36 -0.11 -0.60 180 330
N38UH 1.22-1.25 12.2-12.5 ≥876 ≥11.0 ≥1990 ≥25 287-310 36-39 -0.11 -0.60 180 330
N40UH 1.25-1.28 12.5-12.8 ≥899 ≥11.3 ≥1990 ≥25 302-326 38-41 -0.11 -0.60 180 330
N42UH 1.28-1.32 12.8-13.2 ≥899 ≥11.3 ≥1990 ≥25 318-342 40-43 -0.11 -0.60 180 330
N28EH 1.04-1.08 10.4-10.8 ≥780 ≥9.8 ≥2388 ≥30 207-231 26-29 -0.11 -0.55 200 330
N30EH 1.08-1.13 10.8-11.3 ≥812 ≥10.2 ≥2388 ≥30 223-247 28-31 -0.11 -0.55 200 330
N33EH 1.13-1.17 11.3-11.7 ≥836 ≥10.5 ≥2388 ≥30 247-271 31-34 -0.11 -0.55 200 330
N35EH 1.17-1.22 11.7-12.2 ≥876 ≥11.0 ≥2388 ≥30 263-287 33-36 -0.11 -0.55 200 330
N38EH 1.22-1.25 12.2-12.5 ≥899 ≥11.3 ≥2388 ≥30 287-310 36-39 -0.11 -0.55 200 330
N40EH 1.25-1.28 12.5-12.8 ≥899 ≥11.3 ≥2388 ≥30 302-326 38-41 -0.11 -0.55 200 330
N28AH 1.04-1.08 10.4-10.8 ≥787 ≥9.9 ≥2624 ≥33 207-231 26-29 -0.10 -0.50 230 350
N30AH 1.08-1.13 10.8-11.3 ≥819 ≥10.3 ≥2624 ≥33 223-247 28-31 -0.10 -0.50 230 350
N33AH 1.13-1.17 11.3-11.7 ≥843 ≥10.6 ≥2624 ≥33 247-271 31-34 -0.10 -0.50 230 350
N35AH 1.17-1.22 11.7-12.2 ≥876 ≥11.0 ≥2624 ≥33 263-287 33-36 -0.10 -0.50 230 350
N38AH 1.22-1.25 12.2-12.5 ≥899 ≥11.3 ≥2624 ≥33 287-310 36-39 -0.10 -0.50 230 350
*.                  
*The above-mentioned data of magnetic properties and physical properties are given at room temperature.          
*\.  
*The max working temperature of magnet is changeable due to length-diameter ratio, coating thickness and another environment factors.  

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