Gold Member Since 2014
TSL Magnetic Material Co., Ltd.

Magnet, NdFeB Magnet, Neodymium Magnet manufacturer / supplier in China, offering D6.35*1.58mm Strong Neodymium Disc Magnet, Rare Earth Sintered Permanent Square NdFeB Magnet, High Permanent Sintered Rectangle Neodymium Rare Earth Magnet and so on.

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Supplier Homepage Product Disc Magnets D6.35*1.58mm Strong Neodymium Disc Magnet

D6.35*1.58mm Strong Neodymium Disc Magnet

FOB Price: US $0.01 / Piece
Min. Order: 10 Pieces
Min. Order FOB Price
10 Pieces US $0.01/ Piece
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Production Capacity: 1000 Ton/Year
Transport Package: Packed in Plastic Then Put in Cartons
Payment Terms: T/T, Paypal, Western Union

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Basic Info
  • Model NO.: N40
  • Shape: Disc
  • Grade: N40
  • Composition: Neodymium Magnet
  • Density: 7.5g/cm3
  • Specification: Rosh
  • HS Code: 7202991900
  • Application: Speaker Magnet, Industrial Magnet, Jewelry Magnet, Solenoid
  • Coating: Nickel
  • Type: Permanent
  • Maximum Operating Temperature: 80 Deg C
  • Trademark: TSL
  • Origin: China
Product Description
Ndfeb Magnet (also known as NdFeB, NIB or Neo magnet), the most widely used type of rare-earth magnet, is a permanent magnet made from an alloy of neodymium, iron and boron to form the ND2Fe14B tetragonal crystalline structure.
Neodymium magnets are the strongest type of permanent magnet made. They have replaced other types of magnet in the many applications in modern products that require strong permanent magnets, such as motors in cordless tools, hard disk drives and magnetic fasteners.

Magnetic Property of Neodymium Magnet
GradeRemanence 
Br
Coercive Force 
Hcb
Intrinsic Coercive force 
Hci
Max Energy Product 
(BH) max
Max Working Temp.
KGTKOeKA/mKOeKA/mMGOeKJ/mºC°F
N3511.4-11.81.18-1.28≥ 10.8≥ 836≥ 12≥ 95533-36263-28780176
N3811.8-12.31.18-1.28≥ 10.8≥ 860≥ 12≥ 95536-39287-31080176
N4012.7-12.91.27-1.29≥ 11.0≥ 876≥ 12≥ 95538-41303-32680176
N4212.9-13.31.29-1.33≥ 10.5≥ 836≥ 12≥ 95540-43318-34280176
N4513.3-13.81.33-1.38≥ 9.5≥ 756≥ 12≥ 95543-46342-36680176
N4813.8-14.21.38-1.42≥ 10.5≥ 835≥ 12≥ 95546-49366-39080176
N5013.8-14.51.38-1.45≥ 10.5≥ 835≥ 11≥ 95547-51374-40680176
N5214.3-14.81.43-1.48≥ 10.8≥ 860≥ 11≥ 87650-53398-42280176
33M11.4-11.81.14-1.18≥ 10.3≥ 820≥ 14≥ 111431-33247-263100212
35M11.8-12.31.18-1.23≥ 10.8≥ 860≥ 14≥ 111433-36263-287100212
38M12.3-12.71.23-1.27≥ 11.0≥ 876≥ 14≥ 111438-41303-326100212
40M12.7-12.91.27-1.29≥ 11.4≥ 907≥ 14≥ 111438-41303-326100212
42M12.8-13.21.28-1.32≥ 11.6≥ 923≥ 14≥111440-43318-342100212
45M13.2-13.81.32-1.38≥ 11.8≥ 939≥ 14≥ 111443-46342-366100212
48M13.6-14.01.36-1.40≥ 11.8≥ 939≥ 14≥ 111446-49366-390100212
50M14.0-14.51.40-1.45≥ 13.0≥ 1033≥ 14≥ 111448-51382-406100212
30H10.8-11.41.08-1.14≥ 10.2≥ 812≥ 17≥ 135328-31223-247120248
33H11.4-11.81.14-1.18≥ 10.6≥ 844≥ 17≥ 135331-33247-263120248
35H11.8-12.31.18-1.28≥ 11.0≥ 876≥ 17≥ 135333-36263-287120248
38H12.3-12.71.23-1.27≥ 11.2≥ 890≥ 17≥ 135336-39287-310120248
40H12.7-12.91.27-1.29≥ 11.5≥ 915≥ 17≥ 135338-41303-326120248
42H12.8-13.21.28-1.32≥ 12.0≥ 955≥ 17≥ 135340-43318-342120248
45H13.2-13.51.32-1.38≥ 12.0≥ 955≥ 17≥ 135342-46335-366120248
46H13.3-13.81.33-1.38≥ 12.2≥ 972≥ 16≥ 127444-47350-374120248
48H13.6-14.31.36-1.43≥ 12.5≥ 995≥ 16≥ 127446-49366-390120248
30SH10.8-11.41.081.14≥ 10.0≥ 796≥ 20≥ 167228-31223-247150302
33SH11.4-11.81.14-1.18≥ 10.5≥ 836≥ 20≥ 167231-34247-276150302
35SH11.8-12.31.18-1.23≥ 11.0≥ 876≥ 20≥ 167233-36263-287150302
38SH12.3-12.71.23-1.27≥ 11.4≥ 907≥ 20≥ 197236-39287-310150302
40SH12.5-12.81.25-1.28≥ 11.8≥ 939≥ 20≥ 197238-41302-326150302
42SH12.8-13.21.28-1.32≥ 11.8≥ 939≥ 20≥ 167240-43320-343150302
45SH13.2-13.81.32-1.38≥ 12.6≥ 1003≥ 20≥ 159243-46342-366150302
30UH10.8-11.41.08-1.14≥ 10.2≥ 812≥ 25≥ 199028-31223-247180356
33UH11.3-11.71.13-1.17≥ 10.7≥ 852≥ 25≥ 199031-33247-263180356
35UH11.7-12.11.17-1.21≥ 10.7≥ 852≥ 25≥ 199033-36263-287180356
38UH12.1-12.51.21-1.25≥ 11.4≥ 907≥ 25≥ 199036-39287-310180356
40UH12.5-12.81.25-1.28≥ 11.4≥ 907≥ 25≥ 199038-41302-326180356
28EH10.5-10.81.05-1.08≥ 9.5≥ 756≥ 30≥ 238826-29207-231200392
30EH10.8-11.41.08-1.14≥ 9.5≥ 756≥ 30≥ 238828-31223-241200292
33EH11.3-11.71.13-1.17≥ 10.2≥ 812≥ 30≥ 238831-33247-263200392
35EH11.7-12.11.17-1.21≥ 10.2≥ 812≥ 30≥ 238833-36263-287200392
38EH12.1-12.51.21-1.25≥ 11.4≥ 907≥ 30≥ 238836-39287-310200392
30AH10.8-11.31.08-1.13≥ 10.2≥ 812≥ 35≥ 278528-32223-255220428
33AH11.2-11.71.12-1.17≥ 10.2≥ 812≥ 35≥ 278531-34247-271220428
 
 

Ndfeb magnet offer the highest (BH)max and high Hci
(BH)max, the Maximum Energy Product, of Neodymium magnets is highest of any kind of permanent magnets today in the world. (BH)max at different grades of Neodymium magnets is 27 to 52 MGOe.

Ndfeb magnet have extremely resistance to demagnetization with Hci, Intrisic coercive force, over 12, 000 Oe.
Because of very high (BH)max and Hci, Neodymium magnets could be used as a reversible medium for large amount of energy transformation in miniaturized application where a strong magnetic demagnetization field exists, such as computer hard drive.

Neodymium magnets are most powerful of any kind of magnetic materials
Br of Neodymium magnets are much more than 11, 000 Gauss. Therefore, Neodymium magnets have strong holding strength on metal surface and could be used as component for holding, separating, etc.
Neodymium magnets must be carefully handled to avoid personal injury and material damage due to its extremely magnetic strength and brittle property.
Neodymium magnets are sensitive to temperature change and even lose magnet properties at high temperature
Neodymium magnets lose -0.09 ~ -0.13% of Br/° C and can work stably under 80° C for low Hci Neodymium magnets and 150° C for high Hci Neodymium magnets.
Neodymium magnets are corrupted in humid environment
Surface protection is strongly recommended, such as plating, varnishing and encapsulating.
Neodymium magnets are hard and brittle
Neodymium magnets can be abrasively machined with coolant served to absorb heating and dust. Without coolant, rare earth magnets could crack and chip by the heat produced during high speed cutting or grinding, and the sparks contain the easily oxidized grinding dust that could cause fire!
Tolerance of Neodymium magnets
Unless otherwise specified, tolerance on dimension of magnetization is ± . 005". Other dimensions are± 1.5% or ± . 010", whichever is greater.


Metric Dimensions6.35mm diameter x 1.58mm thick
MaterialSintered Neodymium-Iron-Boron (NdFeB)
ShapeDisc
PlatingNi-Cu-Ni (Nickel)
Magnetization DirectionThickness
GradeN40
Pull Force (lbs[g])1.35[612]
Surface Field(G)2528
Maximum Operating Temperature80 Deg C (176 Deg F)
Dimensional Tolerance+/-0.005"
Volume (cm3)0.05
Weight (g)0.38
Remanent Flux Density Br (kG [T])12.5-12.8 [1.25-1.28]
Coercivity HcB (kOe [kA/m])>=10.9 [>=867]
Intrinsic Coercivity HcJ (kOe [kA/m])>=12.0 [>=995]
Maximum Energy Product Bhmax (MGOe [kJ/m3])38-41 [302-326]
Density p(g/cm3)>=7.45
Compression Strength (Mpa)600-1200
Bending Strength (Mpa)150-380
Vickers Hardness (HV)460-660
Recoil Permeability (urec)1.05
Electrical Resistance (Ohm*mm2/m)1.25-1.55
Curie Temperature Tc (° C)310
Thermal Expansion Coefficient 100° C//(x10^-6/K)6
Thermal Expansion Coefficient 100° C? (x10^-6/K)-1
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