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.  

Mortar Lab Equipment

In order to develop the mortar formulation or Quality control for mortar production, mortar lab is necessary to be established. There are quite some basic equipments or accessories for a standard mortar lab such as mortar mixer with different volume, portable or table-type pull-off tester for tensile adhesion test, flexural & compressive test machine, universal testing machine for elongation test, drying oven or curing chamber for controlled temperature and humidity, seiving machine for sand grading and so on. Except the international standard requiremnt, some special test method can also be fulfilled by some tailor-made facilities, which is also possible to be designed or manufactured here.

Cement mortar mixer, tensile adhesion test, pull-off tester, universal testing machine, curing chamber

Shanghai Na Long Tech Co., Ltd , https://www.na-long.com