Sintered NdFeB magnets
NdFeB arc magnets
NdFeB block magnets
NdFeB ring magnets
NdFeB cylinder magnets
NdFeB disc magnets
NdFeB tube magnets
NdFeB rod magnets
NdFeB sphere magnets
Customer magnets
Bonded NdFeB magnets
Compression magnets
Injection magnets
AlNiCo magnets
AlNiCo block magnets
AlNiCo ring magnets
U-shape magnets
AlNiCo arc magnets
AlNiCo disc magnets
AlNiCo cylinder magnets
Irregular magnets
SmCo magnets
SmCo arc magnets
SmCo block magents
SmCo Cylinder magnets
SmCo disc magnets
SmCo ring magnets
Customers magnets
Ferrite magnets
Ferrite arc magnets
Ferrite block magnets
Ferrite cylinder magnets
Ferrite disc magnets
Ferrite ring magnets
magnetic filter
magnetic rods
magnetic grids
magnetic separator
Water magnetic clean
water magnetic filter
magnetic speaker parts
tweeter
york
motor parts
rotor parts
shaft parts
stator parts
other magnetic applications
cow magnets
cup magnet
magneitc coupling
Magnetic chuck
magnetic holding tool
Magnetic hook
magnetic lifter
OEM products
1.The sintered NdFeB magnets are the third generation rare earth magnets. It is the most powerful and strongest magents in World at present. It was found at 1980's.
2.The ring magnets are one regular and popular shape for the sintered NdFeB magnets.
NdFeB ring magnets are mainly used in loudspeakers.
3.The fast development in loudspeakers, earthphone or other audio equipment require very high energy neo magnets which has stable performance at high temperature. Our SH grade ring magnets are proved to be the one of best choice.
4.As for high bonding power requirement for the magnets in assemblying to loudspeaker parts, surface tension of the coating is critical for magnet choice. Our trivalent chrome Zinc coating on neo magnets provide high surface tension and it is surely of environmental protection.
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Magnetic Characteristics And Physical Properties of Sintered NdFeB |
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Properties |
Remanence |
Coercive Force |
Intrinsic Coercive Force |
Max Energy Product |
Max Working Temp |
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|
Br |
Hcb |
Hcj |
(BH)max |
Tw |
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|
Grade |
mT(KGs) |
KA/m (KGs) |
KA/m (KOe) |
KJ/m 3 ( MGOe ) |
℃ |
|
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N-30 |
1080-1130 |
≥ 796 |
≥ 955 |
223-247 |
≤ 80 |
|
|
(10.8-11.3) |
( ≥ 10) |
( ≥ 12) |
(28-31) |
|||
|
N-33 |
1130-1180 |
≥ 836 |
≥ 955 |
247-270 |
≤ 80 |
|
|
(11.3-11.8) |
( ≥ 10.5) |
( ≥ 12) |
(31-34) |
|||
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N-35 |
1170-1220 |
≥ 868 |
≥ 955 |
263-287 |
≤ 80 |
|
|
(11.7-12.2) |
( ≥ 10.9) |
( ≥ 12) |
(33-36) |
|||
|
N-38 |
1220-1250 |
≥ 899 |
≥ 955 |
287-310 |
≤ 80 |
|
|
(12.2-12.5) |
( ≥ 11.3) |
( ≥ 12) |
(36-39) |
|||
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N-40 |
1250-1280 |
≥ 923 |
≥ 955 |
302-326 |
≤ 80 |
|
|
(12.5-12.8) |
( ≥ 11.6) |
( ≥ 12) |
(38-41) |
|||
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N-42 |
1280-1320 |
≥ 923 |
≥ 955 |
318-342 |
≤ 80 |
|
|
(12.8-13.2) |
( ≥ 11.6) |
( ≥ 12) |
(40-43) |
|||
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N-45 |
1320-1380 |
≥ 876 |
≥ 955 |
342-366 |
≤ 80 |
|
|
(13.2-13.8) |
( ≥ 11.0) |
( ≥ 12) |
(43-46) |
|||
|
N-48 |
1380-1420 |
≥ 836 |
≥ 876 |
366-390 |
≤ 80 |
|
|
(13.8-14.2) |
( ≥ 10.5) |
( ≥ 11) |
(46-49) |
|||
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N-50 |
1400-1450 |
≥ 860 |
≥ 876 |
382-406 |
≤ 80 |
|
|
(14.0-14.5) |
( ≥ 10.8) |
( ≥ 11) |
(48-51) |
|||
|
30M |
1080-1130 |
≥ 796 |
≥ 1114 |
223-247 |
≤ 100 |
|
|
(10.8-11.3) |
( ≥ 10) |
( ≥ 14) |
(28-31) |
|||
|
33M |
1130-1180 |
≥ 836 |
≥ 1114 |
247-270 |
≤ 100 |
|
|
(11.3-11.8) |
( ≥ 10.5) |
( ≥ 14) |
(31-34) |
|||
|
35M |
1170-1220 |
≥ 868 |
≥ 1114 |
263-287 |
≤ 100 |
|
|
(11.7-12.2) |
( ≥ 10.9) |
( ≥ 14) |
(33-36) |
|||
|
38M |
1220-1250 |
≥ 899 |
≥ 1114 |
287-310 |
≤ 100 |
|
|
(12.2-12.5) |
( ≥ 11.3) |
( ≥ 14) |
(36-39) |
|||
|
40M |
1250-1280 |
≥ 923 |
≥ 1114 |
302-326 |
≤ 100 |
|
|
(12.5-12.8) |
( ≥ 11.6) |
( ≥ 14) |
(38-41) |
|||
|
42M |
1280-1320 |
≥ 955 |
≥ 1114 |
318-342 |
≤ 100 |
|
|
12.8-13.2 |
( ≥ 12.0) |
( ≥ 14) |
(40-43) |
|||
|
45M |
1320-1380 |
≥ 995 |
≥ 1114 |
342-366 |
≤ 100 |
|
|
(13.2-13.8) |
( ≥ 12.5) |
( ≥ 14) |
(43-46) |
|||
|
48M |
1360-1430 |
≥ 1027 |
≥ 1114 |
366-390 |
≤ 100 |
|
|
(13.6-14.3) |
( ≥ 12.9) |
( ≥ 14) |
(46-49) |
|||
|
50M |
1400-1450 |
≥ 1033 |
≥ 1114 |
382-406 |
≤ 100 |
|
|
(14.0-14.5) |
( ≥ 13.0) |
( ≥ 14) |
(48-51) |
|||
|
30H |
1080-1130 |
≥ 796 |
≥ 1353 |
223-247 |
≤ 120 |
|
|
(10.8-11.3) |
( ≥ 10) |
( ≥ 17) |
(28-31) |
|||
|
33H |
1130-1180 |
≥ 836 |
≥ 1353 |
247-271 |
≤ 120 |
|
|
(11.3-11.8) |
( ≥ 10.5) |
( ≥ 17) |
(31-34) |
|||
|
35H |
1170-1220 |
≥ 868 |
≥ 1353 |
263-287 |
≤ 120 |
|
|
(11.7-12.2) |
( ≥ 10.9) |
( ≥ 17) |
(33-36) |
|||
|
38H |
1220-1250 |
≥ 899 |
≥ 1353 |
287-310 |
≤ 120 |
|
|
(12.2-12.5) |
( ≥ 11.3) |
( ≥ 17) |
(36-39) |
|||
|
40H |
1250-1280 |
≥ 923 |
≥ 1353 |
302-326 |
≤ 120 |
|
|
(12.5-12.8) |
( ≥ 11.6) |
( ≥ 17) |
(38-41) |
|||
|
42H |
1280-1320 |
≥ 955 |
≥ 1353 |
318-342 |
≤ 120 |
|
|
(12.8-13.2) |
( ≥ 12.0) |
( ≥ 17) |
(40-43) |
|||
|
45H |
1320-1380 |
≥ 963 |
≥ 1353 |
342-366 |
≤ 120 |
|
|
(13.2-13.8) |
( ≥ 12.1) |
( ≥ 17) |
(43-46) |
|||
|
48H |
1370-1430 |
≥ 995 |
≥ 1274 |
366-390 |
≤ 120 |
|
|
(13.7-14.3) |
( ≥ 12.5) |
( ≥ 16) |
(46-49) |
|||
|
30SH |
1080-1130 |
≥ 804 |
≥ 1592 |
223-247 |
≤ 150 |
|
|
(10.8-11.3) |
( ≥ 10.1) |
( ≥ 20) |
(28-31) |
|||
|
33SH |
1130-1170 |
≥ 844 |
≥ 1592 |
247-271 |
≤ 150 |
|
|
(11.3-11.7) |
≥ 10.6 |
( ≥ 20) |
(31-34) |
|||
|
35SH |
1170-1220 |
≥ 876 |
≥ 1592 |
263-287 |
≤ 150 |
|
|
(11.7-12.2) |
( ≥ 11.0) |
( ≥ 20) |
(33-36) |
|||
|
38SH |
1220-1250 |
≥ 907 |
≥ 1592 |
287-310 |
≤ 150 |
|
|
(12.2-12.5) |
( ≥ 11.4) |
( ≥ 20) |
(36-39) |
|||
|
40SH |
1250-1280 |
≥ 939 |
≥ 1592 |
302-326 |
≤ 150 |
|
|
(12.5-12.8) |
( ≥ 11.8) |
( ≥ 20) |
(38-41) |
|||
|
42SH |
1280-1320 |
≥ 995 |
≥ 1592 |
318-342 |
≤ 150 |
|
|
(12.8-13.2) |
( ≥ 12.5) |
( ≥ 20) |
(40-43) |
|||
|
45SH |
1320-1380 |
≥ 1003 |
≥ 1592 |
342-366 |
≤ 150 |
|
|
(13.2-13.8) |
( ≥ 12.6) |
( ≥ 20) |
(43-46) |
|||
|
28UH |
1020-1080 |
≥ 764 |
≥ 1990 |
207-231 |
≤ 180 |
|
|
(10.2-10.8) |
( ≥ 9.6) |
( ≥ 25) |
(26-29) |
|||
|
30UH |
1080-1130 |
≥ 812 |
≥ 1990 |
223-247 |
≤ 180 |
|
|
(10.8-11.3) |
( ≥ 10.2) |
( ≥ 25) |
(28-31) |
|||
|
33UH |
1130-1170 |
≥ 852 |
≥ 1990 |
247-271 |
≤ 180 |
|
|
(11.3-11.7) |
( ≥ 10.7) |
( ≥ 25) |
(31-34) |
|||
|
35UH |
1180-1220 |
≥ 860 |
≥ 1990 |
263-287 |
≤ 180 |
|
|
(11.8-12.2) |
( ≥ 10.8) |
( ≥ 25) |
(33-36) |
|||
|
38UH |
1220-1250 |
≥ 907 |
≥ 1990 |
287-310 |
≤ 180 |
|
|
(12.2-12.5) |
( ≥ 11.4) |
( ≥ 25) |
(36-39) |
|||
|
30EH |
1080-1130 |
≥ 812 |
≥ 2388 |
223-247 |
≤ 200 |
|
|
(10.8-11.3) |
( ≥ 10.2) |
( ≥ 30) |
(28-31) |
|||
|
33EH |
1130-1170 |
≥ 812 |
≥ 2388 |
247-271 |
≤ 200 |
|
|
(11.3-11.7) |
( ≥ 10.2) |
( ≥ 30) |
(31-34) |
|||
|
35EH |
1170-1220 |
≥ 876 |
≥ 2388 |
263-287 |
≤ 200 |
|
|
(11.7-12.2) |
( ≥ 11.0) |
( ≥ 30) |
(33-36) |
|||
|
30AH |
1080-1130 |
≥ 812 |
≥ 2785 |
223-247 |
≤ 240 |
|
|
(10.8-11.3) |
( ≥ 10.2) |
( ≥ 35) |
(28-31) |
|||
|
33AH |
1130-1170 |
≥ 812 |
≥ 2785 |
247-271 |
≤ 240 |
|
|
(11.3-11.7) |
( ≥ 10.2) |
( ≥ 35) |
31-34 |
|||
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NOTES: |
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The above-mentioned data of magnetic parameters and physical properties ars given at room temperature. |
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The maximum service temperature of magnet is changeable due to the ratio length and diameter and |
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Environmental factors. |
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Density: 7.4~7.6g/cm 3 ; α Br:-0.09~0.13%/ ℃, β Hcj: -0.50~0.80%/ ℃; Hv:600. |