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7mm x 4mm Hole 2mm N52 Countersunk Ring Rare Earth Neodymium Magnet

7mm x 4mm Hole 2mm N52 Countersunk Ring Rare Earth Neodymium Magnet
7mm x 4mm Hole 2mm N52 Countersunk Ring Rare Earth Neodymium Magnet
  • Stock: In Stock
  • Brand: JC-magnetics
  • Model: JCN52-CSK7-4-H2
  • UPC: 378328419252
$0.75
50 or more $0.49
100 or more $0.46
500 or more $0.42

Available Options

This product has a minimum quantity of 25

Pull Force: 3.64 LB

Dimensions: 7mm diameter x 4mm thickness, hole 2mm, (0.276in x 0.157in x 0.078in) approx. 9/32in x 5/32in hole 5/64"

Material Features: Neodymium (chemical symbol Nd) is element 60 on the periodic table. It is a rare earth metal and forms one of the Lanthanides series. When added to Iron (Fe) and Boron (B) (chemical formula Nd14Fe21B) the resultant magnets are the strongest magnets currently available. Neodymium magnets are sometimes known as Neo, Neod or NIB magnets. Neodymium magnets are usually coated Nickel-Copper-Nickel plating to prevent the iron from rusting. Neodymium magnets are made of a brittle material. These magnets are not as strong as steel.  They are more like a brittle ceramic.  If you let two magnets slam together, they can crack and break. This is true for magnets large and small.  

Warning: These magnets are very powerful which should be handled with great care. Children should not be allowed to handle neodymium magnets, as they can be dangerous. These magnets are not toys. Small magnets risk a chocking hazard and should never be swallowed or inserted into any part of the body. Never allow neodymium magnets near a person with a pacemaker or similar medical devices. The strong magnetic fields can affect the operation of such devices.

Magnet Specifications
Dimensions7mm x 4mm Hole 2mm, Tolerances ±0.1mm x ±0.1mm
Matching Screw Size

#1

Pull Force (Approx.)

Magnet to a Steel Plate: 3.64 LB

Between 2 Steel Plates: 5.39 LB

Magnet to Magnet: 3.64 LB

MaterialNdFeB, Grade N52
ShapeCountersunk Ring
Plating/CoatingNi-Cu-Ni (Nickel)
Magnetization DirectionAxial (Poles on Flat Ends)
Surface Field-1,610 Gauss
Max Operating Tempetature176ºF (80ºC)
Brmax14,800 Gauss
BHmax52 MGOe

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