February 22, 2025

Super Strong Ring Neodymium Round Magnets with Holes for Speaker

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Model NO.: Ring Neodymium round magnets with hole
Trademark: YYMAG
Origin: China
HS Code: 85051110
Super strong ring Neodymium round magnets with holes for speaker
Neodymium Magnet ( also known as NdFeB magnet ), is the most widely used type of rare-earth magnet, is a permanent magnet made from an alloy of neodymium, iron and boron to form the NdFeB tetragonal crystalline structure.
 
The neodymium magnet is customized, please kindly tell us the grade, size,coating and quantity of the magnet you need, we will quote to you soon.

Detailed product information:
 
Material Sintered Neodymium-Iron-Boron (NdFeB)
Size  Various kinds or according to customers' request
Shape Disc/ Customzsed (block,disc,Cylinder, Bar, Ring,Countersunk, Segment,hook,cup, Trapezoid, Irregular shapes ,etc)
Performance N52/Customised (N33 N35 N38 N40 N42 N45 N48 N50 N52 …...)
Coating Ni-Cu-Ni, Nickel / Customised (Zn,Ni-Cu-Ni,Ni,Gold, Silver, Copper, Epoxy, Chrome, etc)
Size tolerance ±0.05mm for diamater/thickness, ±0.1mm for width/length
Magnetization Thickness Magnetized, Axially Magnetized, Diametrally Magnetized, Multi-poles magnetized, Radial Magnetized. (Customzied specific requirements magnetized)
Max. Working Temperature Grade Max. Operating Temperatures
N35-N52 80°C (176°F)
33M- 48M 100°C (212°F)
33H-48H 120°C (248°F)
30SH-45SH 150°C (302°F)
30UH-40UH 180°C (356°F)
28EH-38EH 200°C (392°F)
28AH-35AH 220°C (428°F)
Applications Neodymium(NdFeB) Magnet are widely used in many fields, such as motors,sensors, microphones, wind turbines, wind generators, printer, switchboard,packing box ,loudspeakers, magnetic separation, magnetic hooks, magnetic holder, magnetic chuck, ect.
 

Typical Magnetic Properties:
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Grade Br Hcb Hcj (BH)max Working Temp
mT Gs kA/m Oe kA/m Oe kJ/m3 MGOe ºC
N35 1180-1230 11800-12300 ≥868 ≥10900 ≥955 ≥12000 263-287 33-36 ≤80
N38 1220-1280 12200-12800 ≥899 ≥11300 ≥955 ≥12000 287-310 36-39
N40 1260-1310 12600-13100 ≥923 ≥11600 ≥955 ≥12000 302-326 38-41
N42 1280-1340 12800-13400 ≥923 ≥11600 ≥955 ≥12000 318-342 40-43
N45 1320-1370 13200-13700 ≥876 ≥11000 ≥955 ≥12000 342-366 43-46
N48 1360-1420 13600-14200 ≥836 ≥10500 ≥876 ≥11000 358-390 45-48
N50 1390-1450 13900-14500 ≥836 ≥10500 ≥876 ≥11000 374-406 47-51
N52 1420-1480 14200-14800 ≥796 ≥10000 ≥876 ≥11000 390-422 49-53
N35M 1180-1230 11800-12300 ≥868 ≥10900 ≥1114 ≥14000 263-287 33-36 ≤100
N38M 1220-1280 12200-12800 ≥899 ≥11300 ≥1114 ≥14000 287-310 36-39
N40M 1260-1310 12600-13100 ≥923 ≥11600 ≥1114 ≥14000 302-326 38-41
N42M 1280-1340 12800-13400 ≥923 ≥11600 ≥1114 ≥14000 318-342 40-43
N45M 1340-1390 13400-13900 ≥876 ≥11000 ≥1114 ≥14000 342-366 43-46
N48M 1360-1420 13600-14200 ≥876 ≥11000 ≥1114 ≥14000 366-390 46-49
N35H 1180-1230 11800-12300 ≥868 ≥10900 ≥1353 ≥17000 263-287 33-36 ≤120
N38H 1220-1280 12200-12800 ≥899 ≥11300 ≥1353 ≥17000 287-310 36-39
N40H 1260-1310 12600-13100 ≥923 ≥11600 ≥1353 ≥17000 302-326 38-41
N42H 1280-1340 12800-13400 ≥923 ≥11600 ≥1353 ≥17000 318-342 40-43
N45H 1330-1390 13300-13900 ≥923 ≥11600 ≥1353 ≥17000 342-366 43-46
N48H 1360-1420 13600-14200 ≥923 ≥11600 ≥1274 ≥16000 366-390 46-49
N33SH 1140-1190 11400-11900 ≥836 ≥10500 ≥1592 ≥20000 247-270 31-34 ≤150
N35SH 1180-1230 11800-12300 ≥868 ≥10900 ≥1592 ≥20000 263-287 33-36
N38SH 1220-1280 12200-12800 ≥899 ≥11300 ≥1592 ≥20000 287-310 36-39
N40SH 1260-1310 12600-13100 ≥923 ≥11600 ≥1592 ≥20000 302-326 38-41
N42SH 1280-1340 12800-13400 ≥923 ≥11600 ≥1592 ≥20000 318-342 40-43
N45SH 1330-1390 13300-13900 ≥923 ≥11600 ≥1592 ≥20000 342-366 43-46
N28UH 1030-1090 10300-10900 ≥780 ≥9800 ≥1990 ≥25000 207-231 26-29 ≤180
N30UH 1090-1140 10900-11400 ≥812 ≥10200 ≥1990 ≥25000 223-247 28-31
N33UH 1130-1170 11300-11700 ≥852 ≥10700 ≥1990 ≥25000 247-263 31-33
N35UH 1180-1220 11800-12200 ≥868 ≥10900 ≥1990 ≥25000 263-287 33-36
N38UH 1220-1270 12200-12700 ≥899 ≥11300 ≥1990 ≥25000 287-310 36-39
N28EH 1030-1090 10300-10900 ≥780 ≥9800 ≥2388 ≥30000 207-231 26-29 ≤200
N30EH 1080-1130 10800-11300 ≥812 ≥10200 ≥2388 ≥30000 223-247 28-31
N33EH 1130-1170 11300-11700 ≥852 ≥10700 ≥2388 ≥30000 247-263 31-33
N35EH 1180-1220 11800-12200