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Neodymium Ring Magnet - 45mm x 32mm x 12mm

Product code: 23002

$47.04for 1 to 9 items
$36.74buy 10 to 99 itemsand save 21%
$29.84buy 100+ itemsand save 36%

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Neodymium Ring Magnet - 45mm x 32mm x 12mm

Rated 4.7 out of 5
Based on 3 reviews
Product Code 23002
Pull Force* 22 kg
Weight 70 gm
Style Rare Earth Ring Magnet
Gauss 5429
Grade N35
Tolerance +/- 0.05mm
Coating Nickel (NiCuNi)
Direction of Magnetisation Axially magnetised thru the 12mm
Dimensions Outside Diameter:45mm, Inside Diameter:32mm, Thickness:12mm
*Measured against up to 10mm mild steel.
Neodymium Ring Magnet - 45mm x 32mm x 12mm

Magnetic Product Description:

This Rare Earth ring magnet has an outside diameter of 45mm, an inside diameter of 32mm and a thickness of 12mm. It has a pull force of 22kg. It is identified by the AMF magnet part number 23002.

Uses for our Rare Earth Ring Magnets:

Audio engineers at the helm of sound recording studios rely on neodymium ring magnets like these, 45mm x 32mm x 12mm, to make beautiful music. The quality and applications and the equipment of sound recording has experienced a revolution since 1990’s with the advent of digital sound recording and broadcasting technology.

Formerly with analogue sound recording equipment, magnets were engaged to strictly regulate the movement of the magnetised tape from one reel, over the audio imprinting section, (where the magnetised particles were frozen into patterns able to be interpreted as audio signals or noise), onto another reel for safe storage. The process of magnetisation has played a vital role in the history of recorded sound.

The relationship between sound recordists and magnets continues apace. The highly sophisticated digital electronics equipment of today still employs magnets for the same reasons legacy technologies employed magnets in times past. For capabilities of reliable and durable holding, fixing, releasing and re-engaging, magnets are a connective tissue within electronics equipment without peer.

The clean and reliable capture of sound for the purpose of recording and broadcast is vital. While people may watch less than perfect images or follow confusing stories, people will not tolerate bad sound in broadcast programs.

Sound engineers or professionals recording sound in film and television, like their peers in the past, still rely on magnets and magnetism to capture and safely store recorded sound.

Film and television directors do not simply call ‘action’. Immediately before calling action for the benefit of the actors, the director first calls, ‘Sound’, letting the sound recordist know to start recording the sound for the impending scene. Then ‘Camera’, to let the camera person know to start capturing the images. Only when the director is satisfied the sound is being recorded and camera is recording the images, all with the cheerful assistance many kinds of magnets and magnetism, does he then call his actors to, well, you know the rest of the story from here. Magnets. Is there anything they can’t do?

average rating 4.7 out of 5
Based on 3 reviews
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100% of reviewers would recommend this product to a friend
3 Reviews
Reviewed by Pamela B.
Verified Buyer
I recommend this product
Rated 4 out of 5
Review posted

A little disappointing

The strength of these magnets is very good and the service was excellent but before we got to use them the coating cracked and a chunk broke off. Still usable but am disappointed

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AMF Magnetics

Hi Pamela
Thank you for your purchase. Unfortunately, all magnets, particularly ring magnets are extremely brittle as they are made from compressed powder. It is very important to follow the Magnet Handling and Safety Guide included with your order. We are pleased to hear you are still able to use your magnet.
Best regards
AMF Magnetics

Reviewed by dave
I recommend this product
Rated 5 out of 5
Review posted

fits in machine outlet

Good size to fit in outlet of machine, recommended.

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Reviewed by Jason
I recommend this product
Rated 5 out of 5
Review posted


User friendly website, prompt delivery, will use again for sure.

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No FAQ available

NB: Ranges are indicative for product category, please check individual products for specic values within that range.

The most common coating for Neodymium magnets is Nickel + Copper + Nickel (Ni + Cu + Ni). This coating offers the magnet relatively good protection from corrosion and passive applications. If the magnet will be exposed to moisture or liquid then consider the use of an organic coating such as Epoxy. A hard wearing coating, Epoxy is suited to applications where the magnet will come under some friction or knocking.

Magnets are readily available in Blocks, Discs, Cylinders & Rings. AMF Magnetics specializes in the supply of short-run prototype magnets including Arc Segments, various magnetic orientations etc. If you need a magnet size that we don't carry in stock, submit a Design-a-Magnet enquiry for a quote on your custom magnet design.

Neodymium magnets are offered in several different grades. The first section N30-54 has an operating temperature of up to 80 degrees. Most of our stock only goes up to N38. The second section, denoted with the "M" prefix after the grade has an operating temperature 100 degrees. After this the grades are "H", "SH", "UH" & "EH". In order for the magnet to withstand a higher operating temperature, during production more of the raw material PrNd is incorporated as these elements have a naturally occurring resistance to high temperatures.