Strong Neodymium Round Speaker Magnets

Model NO.: N40
Magnetism Direction: Thickness
MOQ: 500PCS
Trademark: hzdunben
Transport Package: Standard Export Package with 32X24X26cm
Specification: By drawing
Origin: Hangzhou
HS Code: 85051190
1.Neodymium Magnet
Neodymium( NdFeB )magnets are the strongest type of rare earth magnet commercially available and are manufactured in a wide range of shapes, sizes and grades. 
 

2. Neodymium Magnet features
Material Sintered Neodymium-Iron-Boron (NdFeB)
Size Various kinds or according to customers' request
Shape Disc/ Customzsed  (block,disc,Cylinder, Bar, Ring,
Countersunk, Segment,hook,cup, Trapezoid, Irregular shapes ,etc)
Performance N52/Customised (N33 N35 N38 N40 N42 N45 N48 N50 N52 …...)
Coating Ni-Cu-Ni, Nickel / Customised (Zn,Ni-Cu-Ni,Ni,Gold, Silver, Copper, Epoxy, Chrome, etc)
Size tolerance ±0.05mm for diamater/thickness, ±0.1mm for width/length
Magnetization Thickness Magnetized, Axially Magnetized, Diametrally Magnetized, Multi-poles magnetized, Radial Magnetized. (Customzied specific requirements magnetized)
Max. Working 
Temperature
Grade Max. Operating Temperatures
N35-N52 80°C (176°F)
33M- 48M 100°C (212°F)
33H-48H 120°C (248°F)
30SH-45SH 150°C (302°F)
30UH-40UH 180°C (356°F)
28EH-38EH 200°C (392°F)
28AH-35AH 220°C (428°F)
Applications Neodymium(NdFeB) Magnet are widely used in many fields, such as motors, 
sensors, microphones, wind turbines, wind generators,  printer, switchboard,packing box , 
loudspeakers, magnetic separation, magnetic hooks, magnetic holder, magnetic chuck, ect.
 Strong Neodymium Round Speaker Magnets

3.Neodymium Magnet Surface coatings
Surface Coating Thickness
(Microns)
Color Resistance
Passivation   0-1 Silver Grey Temporary Protection
Nickel Ni+Ni 10-20 Bright Silver Excellent against Humidity
Ni+Cu+Ni
Zinc Zn 8-20 Bright Blue Good Against Salt Spray
C-Zn Shinny Color Excellent Against Salt Spray
Tin Ni+Cu+Sn 15-20 Silver Superior Against Humidity
Gold Ni+Cu+Au 10-20 Gold Superior Against Humidity
Copper Ni+Cu 10-20 Gold Temporary Protection
Epoxy Epoxy 15-25 Black, Red, Grey Excellent Against Humidity & Salt Spray
Ni+Cu+Epoxy
Zn+Epoxy
Chemical Ni 10-20 Silver Grey Excellent Against Humidity
Parylene Parylene 5-20 Grey Excellent Against Humidity, Salt Spray. 
Superior Against Solvents, Gases, 
Fungi and Bacteria.
Strong Neodymium Round Speaker Magnets

4.Buyer's guide
In order to get accurate quotation at first time, pls let me know below infor
Shape Block/Rectangle/Square Disc/Round/Cylinder Ring/Countersunk 
Dimension L (?) x W(? ) xT(?) D(?) x T(?) OD(?) x ID(?) x T(?)
For other shapes,please tell more in details or drawing would be much appreciated.
Coating Zn,Nickel,Ni-Cu-Ni,Epoxy,Au,Silver or other ?
Working Temperature Normal or High temperature ?

5.My promise and contact details
a:100% new raw material (we promise all material is new,no second material)
b:100% most competitive price (I will try my best to get your ideal price)
c:100% shipment on time (i will iform u if any delay)
d:100% perfect service after sale (U can contact me any time if there is any questions after u get magnets)  
Strong Neodymium Round Speaker Magnets

 

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