Big Neodymium Magnets

Name: Big Neodymium Magnets
Brand: Ningbo Beilun Meank Magnetics Co.,Ltd.

The neodymium magnet block with length and width over 40mm and the round neodymium magnets with diameter over 40mm are usually known as big neodymium magnets.

Meank manufacture and supply nice big neodymium rare earth magnets,we have wide size range for big strong magnets for sale,the dimension of the biggest neodymium magnet is close to 250mm.

Introducing a super-sized circular neodymium magnet with zinc coating for immense magnetic strength. Ideal for large-scale shipbuilding and machinery industries. Handle with utmost care. Custom hole options available upon inquiry.

Available Surface Treatment for Big Neodymium(NdFeB) Magnets

Big neodymium(NdFeB) rare earth magnets material are not rust-resistant, surface protection treatment is necessary for a big neodymium strong magnet. Here is the available surface treatment for big rare earth neodymium strong magnets,and details of each kind of coating.

Surface	Coating	Thickness (Microns)	Color	Resistance
Passivation		1	Silver Grey	Temporary Protection
Nickel	Ni+Ni	10-20	Bright Silver	Excellent Against Humidity
Nickel	Ni+Cu+Ni	10-20	Bright Silver	Good Against Salt Spray
Zinc	Zn	8-20	Bright Blue	Excellent Against Salt Spray
Zinc	C-Zn	8-20	Shinny Color	Superior Against Humidity
Tin	Ni+Cu+Sn	15-20	Silver	Superior Against Humidity
Silver	Ni+Cu+Ag	10-20	Silver	Superior Against Humidity
Gold	Ni+Cu+Au	10-20	Gold	Temporary Protection
Copper	Ni+Cu	10-20	Gold	Excellent Against Humidity&Salt Spray
Epoxy	Epoxy	15-25	Black,Red,Grey	Excellent Against Humidity,Salt Spray,Superior Against Solvents,Gases, Fungi and Bacteria,FDA Approved
	Ni+Cu+Epoxy			Excellent Against Humidity
	Zn+Epoxy			Resistance
Parylene	Parylene	5-20	Grey	Excellent Against Humidity
Chemical	Ni	10-20	Silver Grey	Excellent Against Humidity

Caution is Necessary for Big Neodymium Strong Magnets

Big neodymium magnets are super powerful and strong magnets,which are very dangerous,they can cause damage to your body and all electronic devices.And are also fragile.So please make sure read the safety neodymium magnets information before using and handle big neodymium magnets.

The Grade for Big Powerful and Strong Rare Earth Neodymium Magnets

The highest available grade for big powerful and strong rare earth neodymium magnets is N52, the table list all available grade for big neodymium magnets,and maximum working temperature for each grade.

Neodymium Material Grade	Maximum Working Temp.	Curie Temp.
N（N35,N38,N40,N42,N45,N48,N50,N52）	176°F (80°C)	590°F (310°C)
N-M（N35M,N38M,N40M,N42M,N45M,N48M,N50M,N52M）	212°F (100°C)	644°F (340°C)
N-H（N35H,N38H,N40H,N42H,N45H,N48H,N50H）	248°F (120°C)	644°F (340°C)
N-SH（N35SH,N38SH,N40H,N42SH,N45SH,N48SH）	302°F (150°C)	644°F (340°C)
N-UH（N28UH,N30UH,N33UH,N35UH,N38UH,N40UH,N42UH）	356°F (180°C)	662°F (350°C)
N-EH（N28EH,N30EH,N33EH,N35EH,N38EH,N40EH）	392°F (200°C)	662°F (350°C)
N-AH（N28AH,N33AH,N35AH,N38AH）	428°F (230°C)	662°F (350°C)

What is the biggest neodymium magnets can I buy?

The biggest neodymium magnets are with 250mm length,we have ever supplied big neodymium magnet block with dimension of 8"x4"x2".