Countersunk magnets are available with either pole on the magnetic face so that they can be used as a pair to attract or repel. If you are using two magnets to attract you need to make sure the opposite poles are facing each other as identical poles will repel!
Product detail
1. Item Name: Custom big round Neodymium magnet with hole in center
2. Material: Neodymium-Iron-Boron
3. Various shapes on offer: block, round, ring, arc - even highly complex forms. Virtually any shape of NdFeB cylinder magnet can be made to your requirements!
Coating of Sintered Ndfed magnets
Surface |
Coating |
Thickness(Microns) of coating |
color |
resistance |
Salt spary Test Standard(hours) |
Nickel |
Ni+Ni |
10-20um |
Bright Silver |
Excellent against Humidity |
24-48 |
Black Nickel |
Ni+Cu+Ni |
10-20um |
Bright black |
Excellent against Humidity&Salt Spray |
48-72 |
Cr6+Zinc |
Zn |
5-8um |
Bright Blue |
Excellent against Salt Spray |
24-48 |
C-Zn |
Shiningcolor |
24-72 |
|||
Cr3+Zinc |
Zn |
5-8um |
Bright Blue |
Good against Salt Spray |
16-48 |
C-Zn |
5-8um |
Shiningcolor |
Excellent against Salt Spray |
24-72 |
|
Tin |
Ni+Cu+Ni+Sn |
10-25um |
Silver |
Superior against Humidity |
48-72 |
Gold |
Ni+Cu+Ni+Au |
6-10um |
Gold |
Superior against Humidity |
----------- |
Ag |
Ni+Cu+Ni+Ag |
6-10um |
Silver |
Superior against Humidity |
----------- |
Epoxy |
Epoxy Ni+Cu+Epoxy Zn+Epoxy |
10-25um |
Black,Grey |
Excellent against Humidity&Salt Spray |
24-48 48-72 48-72 |
Passivation |
---------- |
1-2um |
Silver Grey |
Temporary Protection |
-------- |
Phosphated |
----------- |
1-2um |
Silver Grey |
Temporary Protection |
-------- |
Remake:1.There is different Salt Spray test results,if the plating technology is different.
2.Salt Spray Test Results,which is plated by Grinding(Small Size Magnets),better than the one which is coated by Hanging us(Big Size magnets).