China Neodymium And Ferrite Magnets Manufacturer & Supplier 
I just saw a magnet related search with this question of what are the consequences of punching holes in magnets? The following editor will describe some of the possible consequences of punching holes yourself and the magnet manufacturers.
If you are trying to drill holes for magnets by yourself, there is a big chance that they will break, because whether it is sintered magnets such as NdFeB or ferrite, they are highly brittle, and the success rate is estimated to be less than 30% when you are not that professional and the right tools are not that suitable.
In addition, you may not be able to precisely control the location and size of the drilled holes.
In the case of neodymium magnets, they are usually plated, and drilling holes can damage the plating and affect the life of the magnet.
Finally, there is a safety threat, as brittle magnets can cause personal injury when drilling holes by chipping out high-speed fragments.
Galvanized rectangular rare earth magnets with screw holes in the center
If the magnet manufacturer carries out the punching, it is not much of a problem, with a low risk of shattering and high precision, as the magnet manufacturer has specialized equipment as well as technicians.
Advice to individual users:
Processing by yourself is risky, unless it's a rubber magnet or flexible magnet, it's strongly not recommended to try, if you have to punch the holes, you can find magnet manufacturers to buy or customize.
Our company is a professional manufacturer of permanent magnets, if you need high strength processed magnets with holes you can provide size drawings or detailed size data, we will provide you with quotations.
Perforated magnet type recommendation;