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Countersunk Strong Rare Earth NdFeB Neodymium Magnets
Dimensions: 15mm x 4mm thick (approx. 5/8"x5/32")
Diameter of bore: 4mm (5/32")
Tolerances: ±0.2mm x ±0.2mm (0.01in)
Material: Neodymium NdFeB Grade N52
Plating/Coating: Ni-Cu-Ni (Nickel)
Magnetization Direction: Axial (Poles on Flat Ends)
Weight: 4.3 g (0.15oz)
Max Operating Temp: 176ºF (80ºC)
Pull Force: Approx. 10 lb (4.5 kg)
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.
Strong magnets should
Keep away from Ironware and some easily magnetized iron products, such
as monitors, bank cards, computers, televisions, mobile phones and
These magnets are very
powerful which should be handled with great care. Without parents
supervised do not allow children to playing magnets as they could get
injured. Especially pay attention to the small magnets , please place in
somewhere children can't reach place.
10pcs 15 x 4mm Hole 4mm N52 Super Strong Countersunk Ring Disc Rare Earth Neodymium Magnets