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Rainbow Magnet Ltd.
Rainbow Magnet Ltd.  

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NdFeB ring magnets.permanent Neodymium magnet ring 

Price: 0.1~20.0 USD 
Payment Terms: T/T,L/C,WU 
Place of Origin: Zhejiang, China (Mainland) 
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Product Detail

Model No.: RM-R15
Production Capacity: 100ton/month
Delivery Date: 4 weeks
Type: Permanent
Brand Name: rainbow magnet
Grade: N/M/H/SH/UH/EH
Means of Transport: Ocean,Land,Air
Packing: standard carton by sea or b...
Application: Speaker Magnet
Composite: Neodymium Magnet
Shape: ring

1) high Br,high Hcj,high (BH)max,
2) high stability
3) black epoxy, white-blue Znic and black Ni coating

 The main physical properties of sintered permanent neodymium iron boron magnet:

magnetic properties
Parameters
Density /g.cm3
VickersHardness HV
Resistivity /υΩ.cm
Compressivestrength/N.mm-2
Coefficient of ThermalExpansion (C⊥)/K-1
Coefficient of ThermalExpansion (C∥) /K-1
7.45
570
150
780
-4.8X10-6
-3.4X10-6

NdFeB has a very high energy product and coercivity, canpick up 660 times of own weight of heavy objects.
The advantage is high cost-effective, with good mechanical properties, easycutting.
Also have high Br,high Hcj,high (BH)max,and high stability become theimportant material of the world.
The shortcoming is the low of the Curie temperature and the temperaturecharacteristics, easy to rust, oxidation, Sintered NdFeB's surface is usuallyrequired for plating such as zinc, nickel, silver, gold, etc., can also be donephosphorus treatment or spray epoxy resin to slow down the oxidationrate.

Nd-Fe-B permanent magnet with its excellent performance,abundant raw material and reasonable price is to be rapid development and wideapplication.
Also becoming increasingly popular across a wide range of novelty productsfor markets.
APPLICATION:
petrochemicals,
nuclear magnetic resonance device,
sound device magnetic suspension system,
magnetic transmission machine
magneto therapy equipment
high performance motors,
sensors
loudspeakers
headphones,
hearing aids

Sintered NdFeB magnet properties of EH grade:

Grade
Residual Induction
Coercive Force
Intrinsic Coercive Force
Maximum Energy Product
Maximum Operating
Temperature
Br
Hcb
Hcj
(BH)max
Tw
T
KGS
KA/m
KOe
KA/m
KOe
KJ/m3
MGOe
N30SH
1.08-1.12
10.8-11.2
804-844
10.1-10.6
≥1592
≥20
223-239
28-30
≤150
N33SH
1.14-1.17
11.4-11.7
820-876
10.3-11.0
≥1592
≥20
247-263
31-33
≤150
N35SH
1.17-1.21
11.7-12.1
860-907
10.8-11.4
≥1592
≥20
263-279
33-35
≤150
N38SH
1.22-1.26
12.2-12.6
907-947
11.4-11.9
≥1592
≥20
287-303
36-38
≤150
N40SH
1.26-1.29
12.6-12.9
907-947
11.4-11.9
≥1592
≥20
303-318
38-40
≤150
N42SH
1.30-1.33
13.0-13.3
907-947
11.4-11.9
≥1512
≥19
318-334
40-42
≤140

demagnetization cuver for Rare earth NdFeB ring magnet



attached pic shows Rare earth NdFeB ring magnet:
bigPhoto
 Ms. Annie

Tel: 86-574-87840198
Fax: 86-574-87393806
Mobile: 86- 189 5744 9606
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Company Info

Rainbow Magnet Ltd. [China (Mainland)]


Business Type:Manufacturer
City: Ningbo
Province/State: Zhejiang
Country/Region: China (Mainland)

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