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Ferrite Ring Magnets(loudspeaker Magnets)

Ferrite Ring Magnets(loudspeaker Magnets)
Description:
  • Material : Hard Ferrite (SrO Fe2O3)
  • Shape of magnet: Ring
  • Grade of magnet: C8
  • Outer diameter : 40mm
  • Inner diameter : 20mm
  • Height: 8mm
  • Tolerance: ±2%
  • Plating : None
  • Operating Temp(Max).: 80℃ （176℉）
  • Maximum Br: 3850Guass
  • Magnetized Direction: Magnetized through thickness
  • Other size and grade are available on request
Ceramic Magnet Ring C8  OD40 X ID20 X 8mm

Grade of Ferrite Magnet
M   
Material		 Br HcB HcJ (BH)max
mT KG KA/m KOe KA/m KOe KJ/m3 MGOe
C1
C5
C7
C8A
C8B
C9
C10
C11		 230
380
340
385
420
380
400
430		 2.3
3.8
3.4
3.85
4.2
3.8
4.0
4.3		 148
191
258
235
232
280
288
200		 1.86
2.4
3.23
2.95
2.913
3.516
3.617
2.512		 258
199
318
242
236
320
280
204		 3.5
2.5
4.00
3.05
2.96
4.01
3.51
2.56		 8.36
27
21.9
27.8
32.8
26.4
30.4
34.4		 1.05
3.4
2.75
3.5
4.12
3.32
3.82
4.32

Dimension range of Disc Magnet
Outer diameter:  5.0mm ~ 180mm
Inner diameter :  2.0mm ~ 150mm
Thickness: 1.0mm ~ 25mm 

Tolerance of Ferrite Magnet  
Standard tolerance : +/-2%
Also stricter tolerance are possible if specially requested.

Surface coating of Ferrite Magnet
Ferrite Magnet,also called Ceramic magnet, there is no surface coating. They do not
Require surface treatment.

Packaging and Delivery
Packaging: Neutral box packaging, inner box , foam inside and other protection, to ensure
safely of transportation.
Delivery time: 8 ~ 20days, depend on customer’s order quantity.



How to order
1.Type of magnet and Grade
2.Dimenion of Magnet
If possible, it’s better to send us a drawing or sketches.
3.Tolerance of Magnet
4.Quantity
5.Direction of Magnetization
6.In case, you have no idea about the grade and surface coating, please tell us the following information:
6-1.What’s the product used for ?
6-2.Operating temperature and environment (dry. Humit, salt or others )


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