Ningbo Xiaosheng Magnetics Co., Ltd Zhejiang, China
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Thinner Neodymium Ring Magnets for Speakers (TNRM-001)
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Thinner Neodymium Ring Magnets for Speakers (TNRM-001) pictures & photos
Basic Info
Model NO.
TNRM-001
Trademark
XIAOSHENG
Origin
China
HS Code
8505
Production Capacity
1500 Tons of Sintered NdFeB Magnets
Product Description
The thinner Neodymium ring magnets for speakers( Mobile Phone Speaker magnets) are usually made by drilling and machining hole on disc magnets. They also can be made into a ring shape directly in pressing machines, if the order quantity is large enough to make a new tooling for it.

For some bigger ring magnets we also have to mill the inner diameter and outer diameter in order to guarantee the suitable size before coating. They will be coated with Nickel(Ni-Cu-Ni), Black Nickel, Zinc(Trivalent), Epoxy, Stannum, Gold, Silver or Parylene etc in order to keep from rusting. The highest grades for these products are N52, N48M, N44H, N42SH, N38UH and N35EH. The biggest size is about D220 X d80 x 50mm.

This kind of Neodymium ring magnets are usually used in speakers, loudspeakers, mobile phones, DC motors and other electronic products and magnetic assemblies.

*Please Note: Xiaosheng Magnetics mainly produce Custom-made NdFeB magnets and magnetic assemblies with high quality at competitive prices, so if you are interested in the above products and looking for a reliable supplier who can produce this kind of products according to your special requirement, please Contact Us Now and we make sure we won't let you down if you could give us a chance to help!


Magnetic Property for sintered NdFeB magnets
 No.   Grade

Br

Hcb

Hcj

(BH)max		 TW*
L/D=0.7
T
KGs		 KA/m
KOe		 KA/m

KOe		 KJ/m3
MGOe
Nom Nim Nom Nim Nom Nim °C
1 N35 1.22
12.2		 1.18
11.8		 907
11.4		 860
10.8		 ≥955
≥12		 287
36		 263
33		 ≤80
2 N38 1.26
12.6		 1.22
12.2		 907
11.4		 860
10.8		 ≥955
≥12		 303
38		 287
36		 ≤80
3 N40 1.29
12.9		 1.26
12.6		 907
11.4		 860
10.8		 ≥955
≥12		 318
40		 303
38		 ≤80
4 N42 1.33
13.3		 1.29
12.9		 907
11.4		 860
10.8		 ≥955
≥12		 342
43		 318
40		 ≤80
5 N45 1.37
13.7		 1.33
13.3		 907
11.4		 863
10.5		 ≥955
≥12		 366
46		 342
43		 ≤80
6 N48 1.41
14.1		 1.37
13.7		 836
10.5		 716
9.0		 ≥836
≥10.5		 390
49		 366
46		 ≤80
7 N50 1.45
14.5		 1.41
14.1		 907
10.5		 860
10.8		 ≥836
≥10.5		 406
51		 390
49		 ≤80
8 N35M 1.22
12.2		 1.18
11.8		 907
11.4		 860
10.8		 ≥1114
≥14		 287
36		 263
33		 ≤100
9 N38M 1.26
12.6		 1.22
12.2		 907
11.4		 860
10.8		 ≥1114
≥14		 303
38		 287
36		 ≤100
10 N40M 1.29
12.9		 1.26
12.6		 907
11.4		 860
10.8		 ≥1114
≥14		 318
40		 303
38		 ≤100
11 N42M 1.33
13.3		 1.29
12.9		 907
11.4		 860
10.8		 ≥1114
≥14		 342
43		 318
40		 ≤100
12 N45M 1.37
13.7		 1.33
13.3		 907
11.4		 860
10.8		 ≥1114
≥14		 366
46		 342
43		 ≤100
13 N48M 1.41
14.1		 1.37
13.7		 907
11.4		 860
10.8		 ≥1114
≥14		 390
49		 366
46		 ≤100
14 N33H 1.18
11.8		 1.14
11.4		 876
11.0		 820
10.3		 ≥1353
≥17		 263
33		 247
31		 ≤120
15 N35H 1.22
12.2		 1.18
11.8		 907
11.4		 876
11.0		 ≥1353
≥17		 287
36		 263
33		 ≤120
16 N38H 1.26
12.6		 1.22
12.2		 940
11.8		 890
11.2		 ≥1353
≥17		 303
38		 287
36		 ≤120
17 N40H 1.29
12.9		 1.26
12.6		 995
12.5		 916
11.5		 ≥1353
≥17		 318
40		 303
38		 ≤120
18 N42H 1.33
13.3		 1.29
12.9		 995
12.5		 939
11.8		 ≥1353
≥17		 342
43		 318
40		 ≤120
19 N44H 1.35
13.5		 1.33
13.3		 1035
13.0		 956
12.0		 ≥1353
≥17		 358
45		 342
43		 ≤120
20 N46H 1.38
13.8		 1.35
13.5		 1035
13.0		 956
12.0		 ≥1353
≥17		 374
47		 358
45		 ≤120
21 N33SH 1.18
11.8		 1.14
11.4		 876
11.0		 820
10.3		 ≥1592
≥20		 263
33		 247
31		 ≤150
22 N35SH 1.22
12.2		 1.18
11.8		 907
11.4		 860
10.8		 ≥1592
≥20		 287
36		 263
33		 ≤150
23 N38SH 1.26
12.6		 1.22
12.2		 907
11.4		 860
10.8		 ≥1592
≥20		 303
38		 287
36		 ≤150
24 N40SH 1.29
12.9		 1.26
12.6		 907
11.4		 860
10.8		 ≥1592
≥20		 318
40		 303
38		 ≤150
25 N42SH 1.33
13.3		 1.29
12.9		 907
11.4		 860
10.8		 ≥1592
≥20		 342
43		 318
40		 ≤150
26 N44SH 1.35
13.5		 1.33
13.3		 907
11.4		 860
10.8		 ≥1592
≥20		 358
45		 342
43		 ≤150
27 N30UH 1.14
11.4		 1.08
10.8		 844
10.6		 804
10.1		 ≥1989
≥25		 247
31		 223
28		 ≤180
37 N33UH 1.18
11.8		 1.14
11.4		 876
11.0		 820
10.3		 ≥1989
≥25		 263
33		 247
30		 ≤180
38 N35UH 1.22
12.2		 1.18
11.8		 907
11.4		 860
10.8		 ≥1989
≥25		 287
36		 263
33		 ≤180
39 N38UH 1.26
12.6		 1.22
12.2		 907
11.4		 860
10.8		 ≥1989
≥25		 303
38		 287
36		 ≤180
40 N30EH 1.14
11.4		 1.08
10.8		 844
10.6		 804
10.1		 ≥2387
≥30		 247
31		 223
28		 ≤200
41 N33EH 1.18
11.8		 1.14
11.4		 876
11.0		 820
10.3		 ≥2388
≥30		 263
33		 247
31		 ≤200
42 N35EH 1.22
12.2		 1.18
11.8		 907
11.4		 836
10.5		 ≥2388
≥30		 287
36		 263
33		 ≤200
 

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