20mm X3mm Hole 5mm Ring Rare Earth Strong Countersunk Neodymium Magnets

  • Model NO.: 250416TC-X01
  • Shape: Ring
  • Grade: N35
  • Transport Package: Cartons
  • Origin: Ningbo, China
  • Application: Industrial Magnet, Motor Magnet
  • Coating: Nickel
  • Trademark: TC
  • Specification: D20X3Xd5 counter sunk hole magnets
  • HS Code: 8505111000
 Features:
Super strong Rare-Earth magnets - once they get stuck with each other, they are hard to break apart.
Can also be used to extend protected lithium batteries with recessed contact points.
Electrically conductive (making them suitable to extend recessed batteries).
Perfect for sticking notes on fridge doors.
Great for do-it-yourself projects.
Ages:7+ ages, both for kids and adults.
Specification:
Brand new and high quality.
Material: Neodymium Rare Earth Magnet.
Plating: Ni-Cu-Ni(Nickel).
Grade: N35.
Magnets Type: Neodymium.
Shape: Hole Disc Magnets.
Total Diameter: 20mm.
Hole Diameter: 5mm.
Thickness: 3mm.
Color: Silver.
Disc magnet with counter sunk hole



Material Grade of NdFeB magnet:
Magnet N-( N35, N38, N40, N42, N45, N48, N50),
Magnet M-(35M, 38M, 40M, 42M, 45M, 48M),
Magnet H-(35H, 38H, 40H, 42H, 45H),
Magnet SH-(30SH, 33SH, 35SH, 38SH, 40SH, 42SH),
Magnet UH-( 28UH, 30UH, 33UH, 35UH, 38UH),
Magnet EH-(28EH, 30EH, 30EH, 33EH, 35EH)

1) Application of NdFeB magnet: Toys, package, Printer, Switchboard, Phone, voice coil motors (VCM's) in hard disk drives, high performance motors, brushless DC motors, magnetic separation, magnetic resonance imaging, sensors, loudspeakers etc.

2) The coating of NdFeB magnets can be Zn, Ni, Ni-Cu-Ni, Epoxy, CR3+ZN, NI+AG, NI+AU.

20mm X3mm Hole 5mm Ring Rare Earth Strong Countersunk Neodymium Magnets
3) Our factory can also manufacture various sizes of NdFeB magnet, according to the customer's specification.20mm X3mm Hole 5mm Ring Rare Earth Strong Countersunk Neodymium Magnets
Magnetic properties of Sintered NdFeB magnets:
Grade Remanence Coercive Force Intrinsic Coercive Force Max. energy product Max.
Operating
Temperature
Br Hcb Hcj (BH ) Tw
max  
mT kA/m kA/m kJ/m3
(kGs) (kOe) (kOe) (MGOe)
N35 1170-1220 >= 868 >=955 263-287 80 C
(11.7-12.2) ( >= 10.9) ( >= 12) (33-36)
N38 1220-1250 >=899 >=955 287-310 80 C
(12.2-12.5) ( >= 11.3) ( >= 12) (36-39)
N40 1250-1280 >= 907 >=955 302-326 80 C
(12.5-12.8) ( >= 11.4) ( >= 12) (38-41)
N42 1280-1320 >= 915 >=955 318-342 80 C
(12.8-13.2) ( >= 11.5) ( >= 12) (40-43)
N45 1320-1380 >= 923 >=955 342-366 80 C
(13.2-13.8) ( >= 11.6) ( >= 12) (43-46)
N48 1380-1420 >= 923 >=955 366-390 80 C
(13.8-14.2) ( >=11.6) ( >= 12) (46-49)
N50 1400-1450 >= 796 >=955 382-406 80 C
(14.0-14.5) ( >= 10.0) ( >= 12) (48-51)
N52 1430-1480 >= 796 >=955 398-422 80 C
(14.3-14.8) ( >= 10.0) ( >= 12) (50-53)
33M 1130-1170 >= 836 >= 1114 247-263 100 C
(11.3-11.7)   (>= 10.5) ( >= 14) (31-33)
35M 1170-1220 >= 868 >= 1114 263-287 100 C
(11.7-12.2) ( >= 10.9) ( >= 14)   (33-36)
38M 1220-1250 >= 899 >= 1114 287-310 100 C
(12.2-12.5) ( >= 11.3) ( >= 14) (36-39)
40M 1250-1280 >= 923 >= 1114 302-326 100 C
(12.5-12.8) ( >= 11.6) ( >= 14) (38-41)
42M 1280-1320 >= 955   >= 1114   318-342   100 C
(12.8-13.2) ( >= 12.0) ( >= 14) (40-43)
45M 1320-1380 >= 995 >= 1114 342-366 100 C
(13.2-13.8) ( >= 12.5) ( >= 14) (43-46)
48M 1360-1430 >= 1027 >= 1114 366-390 100 C
(13.6-14.3) ( >= 12.9) ( >= 14) (46-49)
50M 1400-1450 >= 1033 >= 1114 382-406 100 C
(14.0-14.5) ( >= 13.0) ( >= 14) (48-51)
35H 1170-1220 >= 868 >= 1353 263-287 120 C
(11.7-12.2) ( >= 10.9) ( >= 17) (33-36)
38H 1220-1250 >= 899 >= 1353 287-310 120 C
(12.2-12.5) ( >= 11.3) ( >= 17) (36-39)
40H 1250-1280 >= 923 >= 1353 302-326 120 C
(12.5-12.8) ( >= 11.6) ( >= 17) (38-41)
42H 1280-1320 >= 955 >= 1353 318-342 120 C
(12.8-13.2) ( >= 12.0) ( >= 17) (40-43)
45H 1320-1360 >= 963 >= 1353 326-358 120 C
(13.2-13.6) ( >= 12.1) ( >= 17) (43-46)
48H 1370-1430 >= 995 >= 1353 366-390 120 C
(13.7-14.3) ( >= 12.5) ( >= 17) (46-49)
35SH 1170-1220 >= 876 >= 1592 263-287 150 C
(11.7-12.2) ( >= 11.0) ( >= 20) (33-36)
38SH 1220-1250 >= 907 >= 1592 287-310 150 C
(12.2-12.5) ( >= 11.4) ( >= 20) (36-39)
40SH 1240-1280 >= 939 >= 1592 302-326 150 C
(12.5-12.8) ( >= 11.8) ( >= 20) (38-41)
42SH 1280-1320 >= 987 >= 1592 318-342 150 C
(12.8-13.2) ( >= 12.4) ( >= 20) (40-43)
45SH 1320-1380 >= 1003 >= 1592 342-366 150 C
(13.2-13.8) ( >= 12.6) ( >= 20) (43-46)
28UH 1020-1080 >= 764 >= 1990 207-231 180 C
(10.2-10.8) ( >= 9.6) ( >= 25) (26-29)
30UH 1080-1130 >= 812 >= 1990 223-247 180 C
(10.8-11.3) ( >= 10.2) ( >= 25) (28-31)
33UH 1130-1170 >= 852 >= 1990 247-271 180 C
(11.3-11.7) ( >= 10.7) ( >= 25) (31-34)
35UH 1180-1220 >= 860 >= 1990 263-287 180 C
(11.8-12.2) ( >= 10.8) ( >= 25) (33-36)
38UH 1220-1250 >= 876 >= 1990 287-310 180 C
(12.2-12.5) ( >= 11.0) ( >= 25) (36-39)
40UH 1240-1280 >= 899 >= 1990 302-326 180 C
(12.5-12.8) ( >=11.3) ( >= 25) (38-41)
28EH 1040-1090 >= 780 >= 2388 207-231 200 C
(10.4-10.9) ( >= 9.8) ( >= 30) (26-29)
30EH 1080-1130 >= 812 >= 2388 223-247 200 C
(10.8-11.3) ( >= 10.2) ( >= 30) (28-31)
33EH 1130-1170 >= 876 >= 2388 247-271 200 C
(11.3-11.7) ( >= 10.5) ( >= 30) (31-34)
35EH 1170-1220 >= 876 >= 2388 263-287 200 C
(11.7-12.2) ( >= 11.0) ( >= 30) (33-36)
38EH 1220-1250 >= 899 >= 2388 287-310 200 C
(12.2-12.5) ( >= 11.3) ( >= 30) (36-39)
28AH 1040-1090 >=787 >= 2624 207-231 230 C
(10.4-10.9) ( >= 9.9) ( >= 33) (26-29)
30AH (26-29) >=819 >= 2624 223-247 230 C
(10.8-11.3) ( >= 10.3) ( >= 33) (28-31)
33AH 1130-1170 >= 843 >= 2624 247-271 230 C
(11.3-11.7) (>= 10.6) ( >= 33) (31-34)

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