Ring NdFeB Magnet with Hole

  • Model NO.: ss-016
  • Manufacturer: Ningbo Keke Magnet Co., Ltd.
  • Type: N35-N50, 35m-48m, 35h-45h, 35sh-45sh, 28uh-38uh, 2
  • Coatings: Ni, Zn, Gold, Copper, Epoxy, etc
  • Hcj: 35koe
  • Specification: ROHS
  • HS Code: 85051110
  • Application: Speaker Magnet, Industrial Magnet, Jewelry Magnet, Solenoid, Motor Magnet
  • Name: Neodymium Ring Magnet
  • Product Certificate: ISO/Ts 16949:2009
  • Hcb: 10.7koe
  • Trademark: COCO
  • Origin: Ningbo China Mainland
Strong ring magnet with hole Description:

1. Materials: Ne-Fe-B

2. Shape: Customized

3. Certificate: ISO/TSI6949: 2009

Specifications:

A. Materials: Neodymium-Ferrum-Boron;
B. Grades: N35-N54, 35M-52M, 33H-50H, 33SH-45SH, 30UH-42UH, 30EH-38EH, and 28AH-33AHB.
C. Coating: Various coatings to protect the magnets, such as Ni, Zn, gold, copper, epoxy, chemical, parylene and so on;
D. Shape: Block, Ring, Disc, Cylinder, Arc(Segment), Half Ring, and Customized Design;
E. Size: Customized size per your requirements, largest block length of 150mm, biggest ring of D220mm, smallest thickness of 0.5mm
F. Performance: High coercive force (Hcb) can reach 9.7kOe (772KA/M), the max operation temp (Tw) is up to 220 degree centigrade or 380 curie temperature;
G. Applications: Magnet Separators, Sensors, Motors, Rotors, Wind turbines, Wind generators, Loudspeakers, Magnetic hooks, Magnetic holder, Filters Automobiles Magnetic jewelries, toys, magnetic buttons, Magnetic therapy and so on;

Production process of Ring Neodymium Magnet Loudspeakers:
Raw Materials-->Mixture--->Vacuum Melting--- > Powder Production--- >Molding ---> Vacuum Sintering--- > Testing--- >Mechanical Processing--- > Surface Coating--- >Magnetized--- > Inspecting--- > Packing and Shipping.


NdFeB Permanent 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
 

 

Technical Data of Sintered NdFeB Magnet
Grade Br Hcb Hcj (BH)max  (Tw)
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  º C
N38 1220-1250 (12.2-12.5) ≥ 899 (  ≥ 11.3) ≥ 955 (  ≥ 12) 287-310 (36-39) 80  º C
N40 1250-1280 (12.5-12.8) ≥ 907 (  ≥ 11.4) ≥ 955 (  ≥ 12) 302-326 (38-41) 80  º C
N42 1280-1320 (12.8-13.2) ≥ 915 (  ≥ 11.5) ≥ 955 (  ≥ 12) 318-342 (40-43) 80  º C
N45 1320-1380 (13.2-13.8) ≥ 923 (  ≥ 11.6) ≥ 955 (  ≥ 12) 342-366 (43-46) 80  º C
N48 1380-1420 (13.8-14.2) ≥ 923 (  ≥ 11.6) ≥ 876 (  ≥ 12) 366-390 (46-49) 80  º C
N50 1400-1450 (14.0-14.5) ≥ 796 (  ≥ 10.0) ≥ 876 (  ≥ 11) 382-406 (48-51) 60  º C
N52 1430-1480 (14.3-14.8) ≥ 796 (  ≥ 10.0) ≥ 876 (  ≥ 11) 398-422 (50-53) 60  º C
30M 1080-1130 (10.8-11.3) ≥ 796 (  ≥ 10.0) ≥ 1114 (  ≥ 14) 223-247 (28-31) 100  º C
33M 1130-1170 (11.3-11.7) ≥ 836 (  ≥ 10.5) ≥ 1114 (  ≥ 14) 247-263 (31-33) 100  º C
35M 1170-1220 (11.7-12.2) ≥ 868 (  ≥ 10.9) ≥ 1114 (  ≥ 14) 263-287 (33-36) 100  º C
38M 1220-1250 (12.2-12.5) ≥ 899 (  ≥ 11.3) ≥ 1114 (  ≥ 14) 287-310 (36-39) 100  º C
40M 1250-1280 (12.5-12.8) ≥ 923 (  ≥ 11.6) ≥ 1114 (  ≥ 14) 302-326 (38-41) 100  º C
42M 1280-1320 (12.8-13.2) ≥ 955 (  ≥ 12.0) ≥ 1114 (  ≥ 14) 318-342 (40-43) 100  º C
45M 1320-1380 (13.2-13.8) ≥ 995 (  ≥ 12.5) ≥ 1114 (  ≥ 14) 342-366 (43-46) 100  º C
48M 1360-1430 (13.6-14.3) ≥ 1027 (  ≥ 12.9) ≥ 1114 (  ≥ 14) 366-390 (46-49) 100  º C
50M 1400-1450 (14.0-14.5) ≥ 1033 (  ≥ 13.0) ≥ 1114 (  ≥ 14) 382-406 (48-51) 100  º C
30H 1080-1130 (10.8-11.3) ≥ 796 (  ≥ 10.0) ≥ 1353 (  ≥ 17) 223-247 (28-31) 120  º C
33H 1130-1170 (11.3-11.7) ≥ 836 (  ≥ 10.5) ≥ 1353 (  ≥ 17) 247-271 (31-34) 120  º C
35H 1170-1220 (11.7-12.2) ≥ 868 (  ≥ 10.9) ≥ 1353 (  ≥ 17) 263-287 (33-36) 120  º C
38H 1220-1250 (12.2-12.5) ≥ 899 (  ≥ 11.3) ≥ 1353 (  ≥ 17) 287-310 (36-39) 120  º C
40H 1250-1280 (12.5-12.8) ≥ 923 (  ≥ 11.6) ≥ 1353 (  ≥ 17) 302-326 (38-41) 120  º C
42H 1280-1320 (12.8-13.2) ≥ 955 (  ≥ 12.0) ≥ 1353 (  ≥ 17) 318-342 (40-43) 120  º C
45H 1300-1360 (13-13.6) ≥ 963 (  ≥ 12.1) ≥ 1353 (  ≥ 17) 326-358 (43-46) 120  º C
48H 1370-1430 (13.7-14.3) ≥ 995 (  ≥ 12.5) ≥ 1353 (  ≥ 17) 366-390 (46-49) 120  º C
30SH 1080-1130 (10.8-11.3) ≥ 804 (  ≥ 10.1) ≥ 1592 (  ≥ 20) 223-247 (28-31) 150  º C
33SH 1130-1170 (11.3-11.7) ≥ 844 (  ≥ 10.6) ≥ 1592 (  ≥ 20) 247-271 (31-34) 150  º C
35SH 1170-1220 (11.7-12.2) ≥ 876 (  ≥ 11.0) ≥ 1592 (  ≥ 20) 263-287 (33-36) 150  º C
38SH 1220-1250 (12.2-12.5) ≥ 907 (  ≥ 11.4) ≥ 1592 (  ≥ 20) 287-310 (36-39) 150  º C
40SH 1240-1280 (12.5-12.8) ≥ 939 (  ≥ 11.8) ≥ 1592 (  ≥ 20) 302-326 (38-41) 150  º C
42SH 1280-1320 (12.8-13.2) ≥ 987 (  ≥ 12.4) ≥ 1592 (  ≥ 20) 318-342 (40-43) 150  º C
45SH 1320-1380 (13.2-13.8) ≥ 1003 (  ≥ 12.6) ≥ 1592 (  ≥ 20) 342-366 (43-46) 150  º C
28UH 1020-1080  (10.2-10.8) ≥ 764 (  ≥ 9.6) ≥ 1990 (  ≥ 25) 207-231 (26-29) 180  º C
30UH 1080-1130  (10.8-11.3) ≥ 812 (  ≥ 10.2) ≥ 1990 (  ≥ 25) 223-247 (28-31) 180  º C
33UH 1130-1170 (11.3-11.7) ≥ 852 (  ≥ 10.7) ≥ 1990 (  ≥ 25) 247-271 (31-34) 180  º C
35UH 1180-1220 (11.8-12.2) ≥ 860 (  ≥ 10.8) ≥ 1990 (  ≥ 25) 263-287 (33-36) 180  º C
38UH 1220-1250 (12.2-12.5) ≥ 876 (  ≥ 11.0) ≥ 1990 (  ≥ 25) 287-310 (36-39) 180  º C
40UH 1240-1280 (12.5-12.8) ≥ 899 (  ≥ 11.3) ≥ 1990 (  ≥ 25) 302-326 (38-41) 180  º C
28EH 1040-1090 (10.4-10.9) ≥ 780 (  ≥ 9.8) ≥ 2388 (  ≥ 30) 207-231 (26-29) 200  º C
30EH 1080-1130 (10.8-11.3) ≥ 812 (  ≥ 10.2) ≥ 2388 (  ≥ 30) 223-247 (28-31) 200  º C
33EH 1130-1170 (11.3-11.7) ≥ 836 (  ≥ 10.5) ≥ 2388 (  ≥ 30) 247-271 (31-34) 200  º C
35EH 1170-1220 (11.7-12.2) ≥ 876 (  ≥ 11.0) ≥ 2388 (  ≥ 30) 263-287 (33-36) 200  º C
38EH 1220-1250 (12.2-12.5) ≥ 899 (  ≥ 11.3) ≥ 2388 (  ≥ 30) 287-310 (36-39) 200  º C
28AH 1040-1090 (10.4-10.9) ≥ 787 (  ≥ 9.9) ≥ 2624 (  ≥ 33) 207-231 (26-29) 230  º C
30AH 1080-1130 (10.8-11.3) ≥ 819 (  ≥ 10.3) ≥ 2624 (  ≥ 33) 223-247 (28-31) 230  º C
33AH 1130-1170 (11.3-11.7) ≥ 843 (  ≥ 10.6) ≥ 2624 (  ≥ 33) 247-271 (31-34) 230  º C

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