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Ring Magnets

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Ring Magnets

Ceramic Ring Magnets are made specifically for loudspeaker systems to crafts and toys and their sizes have evolved with demand from this market. However, they are also commonly used in magnetic rollers for separating applications and in the printing industry. They are also a vital component found in fast running conveyor systems in many manufacturing plants dealing with ferrous material. Ferrite Magnets are a low cost alternative to the more expensive (and powerful) neodymium magnet ranges.

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Ceramic Ferrite Ring Magnet

Ferrite Ring magnets can be used in a wide range of applications due to their high coercivity and low cost. Common applications include reed switches, loud speakers, security systems, audio and television and also holding devices such as pot magnets. These popular magnets offer a medium level of magnetism and a good depth of field.

A ferrite ring magnet is a ferrite disc magnet with a concentric hole inside it. A ferrite countersunk magnet is a ferrite ring magnet with one side appearing as a standard ring but the other side is seen as an angled countersink which allow a screw head to fit inside, the angle usually being (but not always) 90 degrees.

A ferrite counterbore ring magnet is a ring magnet with a cylindrical flat-bottomed hole on one side that enlarges the main central hole to take a cap head screw inside the magnet. Ferrite ring magnets are also known as ferrite pure rings, ferrite countersunk magnets, and ferrite counterbore magnets.

All the ferrite ring magnets are nearly always axially magnetised - the ferrite magnet is magnetised along its central axis. Unless stated otherwise the ferrite ring magnets, ferrite countersunk ring magnets and ferrite counterbore ring magnets are all axially magnetised. Axially magnetised magnets have one flat end circular face as a North and the other flat circular end face as a South. For pure ferrite rings, polarity is changed by simply turning the magnet over. For the countersunk and counterbore ferrite ring magnets, North versions have a North at the countersunk / counterbore side (with a South at the other end - which appears like a normal ring); South versions have a South at the countersunk / counterbore side (with a North at the other end - which appears like a normal ring).

In applications where the ferrite ring magnets are clamping onto ferromagnetic surfaces (e.g. mild steel), any version could be used - sometime placing in a N-S-N-S arrangement may give a small increase in performance as the magnets link their magnetism in a positive way. In applications where magnets are attracting magnets, just ensure that a North face of one magnet is attracting a South face of another magnet (unlike poles attract; like poles repel). When screwing ring magnets in place please do not over tighten the screws otherwise it may cause the Ferrite ring magnet to break. Ferrite magnets are brittle (like all magnets) and are not designed for load bearing (e.g. high clamping forces) We produce custom magnets.

ROHS-Directive

Magnosphere conforms to the RoHs directive and the Reach and PFOS regulations. Directive 2002/96 / EC of the European Parliament and of the Council, of January 27, 2003, on waste electrical and electronic equipment (WEEE).

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  • Hotline: +49 (0) 2241 959450
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