Neodymium Ring Magnets

Neodymium Ring Magnets

Application: Neodymium Magnets for Speaker, Motor etc.

Shape: Ring Magnets

Size: Outer Diameter * Inner Diameter * Thickness

Magnetization Direction: Through Diameter or Thickness, or Multi-poles thourgh thickness

Grade: N35, N38, N40, N42, N45, N48, N50, N52, 30M, 33M, 35M, 38M, 40M, 42M, 45M, 48M, 50M, 30H, 33H, 35H, 38H, 40H, 42H, 45H, 48H, 28SH, 30SH, 33SH, 35SH, 38SH, 40SH, 42SH, 45SH, 30UH, 33UH, 35UH, 38UH, 40UH, 28EH, 30EH, 33EH, 35EH,38EH, 28AH, 30AH, 33AH, 35AH

Coating: NiCuNi, Zn3+Cr, Epoxy, NiCuNi+Epoxy, Sn, Cr, Ag, Au, Passivated, Phosphating etc.

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Description

Neodymium Ring Magnets Used in Speaker, Motor etc.

China Rare Earth Magnet Limited always custom neodymium magnets in ring or other shapes according to clients' requirements, drawings or actual samples. If you demand such products, please tell us the OD, ID, Thickness, grade, magnetization direction, coating & quantity.

The size scope of out diameter is 2.5-230mm, thickness is 0.5-60mm. Some customers requested ring magnets like OD155xID60x36mm, OD100xID50x40mm, mini ring magnets like OD2.5xID1x0.8mm. Many clients requested us to ship ring neodymium magnets by air or express, we usually pack the goods with foam and iron sheets in cartons.

Neodymium ring magnets are widely used in motor, speaker, electronics, instruments etc.

Magnetic Properties of Sintered Neodymium Magnets

Grade

Remanence

Coercive Force

Intrinsic Coercive Force

Max. energy product

Max.

Operating

Temperature

Br

Hcb

Hcj

(BH )

Tw

max  

mT

kA/m

kA/m

kJ/m3

(kGs)

(kOe)

(kOe)

(MGOe)

N35

1170-1220

>= 868

>=955

263-287

80°C

(11.7-12.2)

( >= 10.9)

( >= 12)

(33-36)

N38

1220-1250

>=899

>=955

287-310

80°C

(12.2-12.5)

( >= 11.3)

( >= 12)

(36-39)

N40

1250-1280

>= 907

>=955

302-326

80°C

(12.5-12.8)

( >= 11.4)

( >= 12)

(38-41)

N42

1280-1320

>= 915

>=955

318-342

80°C

(12.8-13.2)

( >= 11.5)

( >= 12)

(40-43)

N45

1320-1380

>= 923

>=955

342-366

80°C

(13.2-13.8)

( >= 11.6)

( >= 12)

(43-46)

N48

1380-1420

>= 923

>=955

366-390

80°C

(13.8-14.2)

( >=11.6)

( >= 12)

(46-49)

N50

1400-1450

>= 796

>=955

382-406

80°C

(14.0-14.5)

( >= 10.0)

( >= 12)

(48-51)

N52

1430-1480

>= 796

>=955

398-422

80°C

(14.3-14.8)

( >= 10.0)

( >= 12)

(50-53)

33M

1130-1170

>= 836

>= 1114

247-263

100°C

(11.3-11.7)  

(>= 10.5)

( >= 14)

(31-33)

35M

1170-1220

>= 868

>= 1114

263-287

100°C

(11.7-12.2)

( >= 10.9)

( >= 14)  

(33-36)

38M

1220-1250

>= 899

>= 1114

287-310

100°C

(12.2-12.5)

( >= 11.3)

( >= 14)

(36-39)

40M

1250-1280

>= 923

>= 1114

302-326

100°C

(12.5-12.8)

( >= 11.6)

( >= 14)

(38-41)

42M

1280-1320

>= 955  

>= 1114  

318-342  

100°C

(12.8-13.2)

( >= 12.0)

( >= 14)

(40-43)

45M

1320-1380

>= 995

>= 1114

342-366

100°C

(13.2-13.8)

( >= 12.5)

( >= 14)

(43-46)

48M

1360-1430

>= 1027

>= 1114

366-390

100°C

(13.6-14.3)

( >= 12.9)

( >= 14)

(46-49)

50M

1400-1450

>= 1033

>= 1114

382-406

100°C

(14.0-14.5)

( >= 13.0)

( >= 14)

(48-51)

35H

1170-1220

>= 868

>= 1353

263-287

120°C

(11.7-12.2)

( >= 10.9)

( >= 17)

(33-36)

38H

1220-1250

>= 899

>= 1353

287-310

120°C

(12.2-12.5)

( >= 11.3)

( >= 17)

(36-39)

40H

1250-1280

>= 923

>= 1353

302-326

120°C

(12.5-12.8)

( >= 11.6)

( >= 17)

(38-41)

42H

1280-1320

>= 955

>= 1353

318-342

120°C

(12.8-13.2)

( >= 12.0)

( >= 17)

(40-43)

45H

1320-1360

>= 963

>= 1353

326-358

120°C

(13.2-13.6)

( >= 12.1)

( >= 17)

(43-46)

48H

1370-1430

>= 995

>= 1353

366-390

120°C

(13.7-14.3)

( >= 12.5)

( >= 17)

(46-49)

35SH

1170-1220

>= 876

>= 1592

263-287

150°C

(11.7-12.2)

( >= 11.0)

( >= 20)

(33-36)

38SH

1220-1250

>= 907

>= 1592

287-310

150°C

(12.2-12.5)

( >= 11.4)

( >= 20)

(36-39)

40SH

1240-1280

>= 939

>= 1592

302-326

150°C

(12.5-12.8)

( >= 11.8)

( >= 20)

(38-41)

42SH

1280-1320

>= 987

>= 1592

318-342

150°C

(12.8-13.2)

( >= 12.4)

( >= 20)

(40-43)

45SH

1320-1380

>= 1003

>= 1592

342-366

150°C

(13.2-13.8)

( >= 12.6)

( >= 20)

(43-46)

28UH

1020-1080

>= 764

>= 1990

207-231

180°C

(10.2-10.8)

( >= 9.6)

( >= 25)

(26-29)

30UH

1080-1130

>= 812

>= 1990

223-247

180°C

(10.8-11.3)

( >= 10.2)

( >= 25)

(28-31)

33UH

1130-1170

>= 852

>= 1990

247-271

180°C

(11.3-11.7)

( >= 10.7)

( >= 25)

(31-34)

35UH

1180-1220

>= 860

>= 1990

263-287

180°C

(11.8-12.2)

( >= 10.8)

( >= 25)

(33-36)

38UH

1220-1250

>= 876

>= 1990

287-310

180°C

(12.2-12.5)

( >= 11.0)

( >= 25)

(36-39)

40UH

1240-1280

>= 899

>= 1990

302-326

180°C

(12.5-12.8)

( >=11.3)

( >= 25)

(38-41)

28EH

1040-1090

>= 780

>= 2388

207-231

200°C

(10.4-10.9)

( >= 9.8)

( >= 30)

(26-29)

30EH

1080-1130

>= 812

>= 2388

223-247

200°C

(10.8-11.3)

( >= 10.2)

( >= 30)

(28-31)

33EH

1130-1170

>= 876

>= 2388

247-271

200°C

(11.3-11.7)

( >= 10.5)

( >= 30)

(31-34)

35EH

1170-1220

>= 876

>= 2388

263-287

200°C

(11.7-12.2)

( >= 11.0)

( >= 30)

(33-36)

38EH

1220-1250

>= 899

>= 2388

287-310

200°C

(12.2-12.5)

( >= 11.3)

( >= 30)

(36-39)

28AH

1040-1090

>=787

>= 2624

207-231

230°C

(10.4-10.9)

( >= 9.9)

( >= 33)

(26-29)

30AH

(26-29)

>=819

>= 2624

223-247

230°C

(10.8-11.3)

( >= 10.3)

( >= 33)

(28-31)

33AH

1130-1170

>= 843

>= 2624

247-271

230°C

(11.3-11.7)

(>= 10.6)

( >= 33)

(31-34)

 Note:
.The above-mentioned data of magnetic parameters and physical properties are given at room temperature.

.The maximum working temperature of magnet is changeable due to ratio of length and diameter and environment factors.