Not only can neodymium magnets be used to process counterbored holes, but ferrite magnets can also be used. Today, Xiao Fu will introduce this type of magnet to you.
Ferrite countersunk magnets refer to ordinary ferrite magnets with countersunk screw holes on their surfaces. Common shapes include round, square, and rectangular. The countersunk holes facilitate screw fixation without protruding from the surface of the magnet.
Ferrite Countersunk (Screw Hole) Magnets

Round countersunk ferrite magnets
The most common shape for countersunk ferrite magnets; the countersunk hole is centred, ensuring even force distribution, and a relatively wide range of standard sizes is available on the market.
Recommended samples: 16mm dia countersunk ferrite magnet ring 16x5mm hole 3mm
Square countersunk ferrite magnets
Square countersunk ferrite magnets have a large contact area and are suitable for installations where the space is regular in shape. They are characterised by their resistance to rotation and excellent stability when fixed in place.
Rectangular countersunk ferrite magnets
Rectangular countersunk magnets are longer in length and can be designed with either a single-hole or double-hole structure, making them suitable for elongated applications.
Recommended samples: Rectangular ferrite magnet with 2 countersunk holes in stock
As ferrite magnets have relatively weak magnetic properties, customers often embed countersunk ferrite magnets into steel casings; the steel casing significantly enhances the magnetic field, resulting in what is known as a ‘pot magnet’, which we also refer to as magnetic assembly.
For projects requiring corrosion resistance, high-temperature resistance and cost-effectiveness, ferrite countersunk magnets are an economical and practical choice, provided that the magnet supplier has the required specifications in stock.
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