China Neodymium And Ferrite Magnets Manufacturer & Supplier 
4-inch (approximately 101 mm) neodymium magnet is a relatively large permanent magnet that is typically used in applications where a high tensile force is required. The characteristics, shape types and their applications of 4-inch neodymium magnets are described in detail below.
4 inch long bar neodymium magnet with 2 M3 countersunk holes
4 inch rare earth neodymium magnet Main Features;
Large contact area and high tensile strength
Normally axially (thickness) magnetized
Standard grade working temperature is 80℃, high temperature grade can reach 200℃.
Can be designed with through holes, countersunk holes, etc.
Usually chamfered to prevent chipping
Normal service life up to 10-15 years
Typical shape of a 4-inch neodymium magnet;
Round, square, rectangular, ring, arc and special with steps, slots, etc.
In terms of application, large size neodymium magnets like 4 inches are mostly used in large magnetic separators, industrial magnetic spreaders, magnetic stirring devices, physical experiment devices, high power motors, wind generators, and magnetic therapy devices because of their strong magnetic force.
Note: The strong magnetism of the large 4-inch neodymium magnets must be taken seriously, and you must be careful when using them, keep a safe distance to prevent the magnets from attracting and colliding with each other. Avoid direct contact between two magnets to prevent shattering or difficult separation.
Above is the introduction for 4 inch neodymium magnet, if you need to buy, please feel free to provide specific information, such as size data, performance level, temperature resistance requirements, surface treatment and so on.
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