Product Description

The company's magnetic assemblies products cover a wide range of types & sizes, including neodymium cup(pot) magnets, ferrite(ceramic) cup/pot magnets,plastic&rubber coated holding magnets，fishing magnets, all kinds of hook magnets, channel magnets, different types of office magnets and so on. In addition to the regular sizes for magnet assemblies, the magnets company completes the processing and assembling of many customized magnets assemblies products every year.

 

The rectangular magnets with holes are give the name of  rare earth neodymium(NdFeB) countersunk block(rectangular) magnets,the countersunk hole make the block magnets mountable.The neodymium countersunk block magnets can be screwed onto other surface,and used as magnetic holders.

 

Surface Treatment of Rare Earth Strong Neodymium Magnet Blocks with Countersunk Hole

 

Rare earth neodymium(NdFeB) countersunk block magnets are not rust-proof and easy to corrode, and their surface needs to be coated for durable, generally including zinc plating, nickel, environmental protection zinc, environmental protection nickel, nickel copper-nickel, environmental protection nickel copper-nickel, epoxy coating, etc.

 

Surface	Coating	Thickness (Microns)	Color	Resistance
Passivation		1	Silver Grey	Temporary Protection
Nickel	Ni+Ni	10-20	Bright Silver	Excellent Against Humidity
	Ni+Cu+Ni			Good Against Salt Spray
Zinc	Zn	8-20	Bright Blue	Excellent Against Salt Spray
	C-Zn		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
Parylene	Parylene	5-20	Grey	Excellent Against Humidity
Chemical	Ni	10-20	Silver Grey	Excellent Against Humidity

 

The Magnetization Direction of Rare Earth Strong Rectangular Neodymium Magnet with Countersunk Hole

 

The magnetized direction of powerful neodymium(NdFeB) countersunk block magnets generally axially magnetized and magnetized through-hole direction, other magnetization direction is determined by the required working face. Please let us know which side is N or S-pole when you order strong neodymium countersunk block magnets.

 

Custom Rare Earth Strong Block Magnets with Mounting Holes

 

Neodymium rare earth countersunk rectangular(block) magnets are custom rare earth magnets, due to the good machinability of sintered Nd-Fe-B material, it can be customized into neodymium(NdFeB) block magnet with countersunk hole in different sizes,mould is not necessary for customizing neodymium block magnets with countersunk mounting holes.We can make all small and large neodymium countersunk block magnets for any quantity.

 

Maximum Working Temperature for Different Grade of Strong NdFeB Countersunk Block Magnets

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)

 

Payment Terms︰ T/T