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Rainbow Magnet Ltd.
Rainbow Magnet Ltd.  

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Neodymium Cylinder Magnets 

Price: 0.01~10.0 USD 
Payment Terms: T/T,L/C,WU 
Place of Origin: Zhejiang, China (Mainland) 
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Product Detail

Model No.: RM-C03
Production Capacity: 100TON/MONTH
Delivery Date: 7-30days
Type: Permanent
Brand Name: rainbow magnet
Means of Transport: Ocean,Air;experess
Packing: standard air cartons or sea...
Application: Speaker Magnet
Composite: Neodymium Magnet

Neo magnet block loudspeaker magnet have high Br,high Hcj,high (BH)max, and high stability, become the important material of the world.

Neodymium Iron Boron cylinder magnets


Nd-Fe-B permanent magnet is manufactured in a wide range of shapes, sizes and grades according customer's demand.
NdFeB has a very high energy product and coercivity, can pick up 660 times of own weight of heavy objects.
The advantage is high cost-effective, with good mechanical properties, easy cutting; according customer's demand to manufacture in a wide range of shapes, sizes and grades.
The shortcoming is easy to rust, oxidation, so the Sintered NdFeB's surface is usually required for plating such as zinc, nickel, copper,silver, gold, etc., can also be done phosphorus treatment or spray epoxy resin to slow down the oxidation rate.
Pic shows magnet with UH grade, it means max working temperature is 180 degree.
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
N28UH
1.04-1.08
10.4-10.8
780-812
9.8-10.2
≥1990
≥25
207-223
26-28
≤180
N30UH
1.08-1.12
10.8-11.2
804-844
10.1-10.6
≥1990
≥25
223-239
28-30
≤180
N33UH
1.14-1.17
11.4-11.7
820-876
10.3-11.0
≥1990
≥25
247-263
31-33
≤180
N35UH
1.17-1.21
11.7-12.1
860-907
10.8-11.4
≥1990
≥25
263-279
33-35
≤180
N38UH
1.22-1.26
12.2-12.6
860-907
10.8-11.4
≥1990
≥25
287-303
36-38
≤180
N40UH
1.26-1.29
12.6-12.9
860-907
10.8-11.4
≥1990
≥25
289-303
38-40
≤180
Note: The above mentioned data of magnetic parameters and physical are given at 20℃±2℃

demagnetization curve for UH grade in difference temperature:



The main physical properties of sintered Neodymium Iron Boron cylinder magnets:
magnetic properties
Parameters
Density /g.cm3
Vickers Hardness HV
Resistivity /υΩ.cm
Compressive strength/N.mm-2
Coefficient of Thermal Expansion (C⊥)/K-1
Coefficient of Thermal Expansion (C∥) /K-1
7.45
570
150
780
-4.8X10-6
-3.4X10-6

How to judge the Permanent magnet material properties advantages and disadvantages of standard?
You can see 3 terms:
1)the magnet -crystalline anisotropy,
2)the magnetization strong
3)the Curie temperature.
We listed the details of rare earth magnet material for your reference and you can according your demand to choose which fit your design.
Type
composition
Magnetic properties
Br/T
Hc
/(Ka/m)
(BH)m/
(kJ/m3)
Tc/℃
Density
g/cm-3
Sinter NdFeB
Nd13.5(Fe,M)bananceB6.1-7.0
1.1-1.4
800-2400
240-400
310-510
7.4-7.6
Bonded
NdFeB
Nd4-13(Fe,M)bananceB6-12
0.6-1.1
800-2100
56-160
310
5.3-6.0
AlNiCo 5
8%-12%Al,15%-22%Ni
5%-24%Co,3%-6%Cu.
Balance Fe
0.7-1.32
40-60
9-56
890
7.3
AlNiCo8
7%-8%Al,14%-15%Ni
34%-36%Co,5%-8%Ti,
3%-4%Cu,Balance Fe
0.3-0.44
250-350
25-36
450
7.3
1:5,SmCo
62%-63%Co,38%-37%Sm
0.9-1.0
1100-1540
117-179
720
8.1
2:17,SmCo
Sm(Co0.69Fe0.2Cu0.1Zr0.01)7.2
1.0-1.3
500-600
230-240
800
8.2
Bonded smco
Sm(Co0.67Fe0.22Cu0.1Zr0.07Ti0.01)7.1
1.0-1.07
800-1400
160-204
810
7.4

APPLICATION:
nuclear magnetic resonance device,
sound device magnetic suspension system,
magnetic transmission machine
magneto therapy equipment
high performance motors,
brushless DC motors,
generators,
magnetic separation,
vibrating motors,
permanent magnet motors,
magnetic thrust axis,
magnetic machinery,
magnetic spring,
magnetic vibration device
magnetic connection,
magnetic drive,
Permanent magnet crane
electromagnetic pumps,
magnetic separators
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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