Neodymium Ring Magnet - 5mm x 2.5mm x 4mm | N42UH | Diametrically Magnetised

Product code: 23023A

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Neodymium Ring Magnet - 5mm x 2.5mm x 4mm | N42UH | Diametrically Magnetised

Rated 5.0 out of 5
Based on 1 review
Product Code 23023A
Pull Force* 0.712 kg
Weight 1 gm
Style Rare Earth Ring magnet
Grade N42UH
Coating Nickel (Ni)
Direction of Magnetisation Diametrically Magnetised
Dimensions Outside Diameter:5mm, Inside Diameter:2.5mm, Thickness:4mm
*Measured against up to 10mm mild steel.
Neodymium Ring Magnet - 5mm x 2.5mm x 4mm | N42UH | Diametrically Magnetised

Magnetic Product Description:

This small rare earth ring magnet has an outside diameter of 5mm, an inside diameter of 2.5mm and a thickness of 4mm. It has a pull force of 710 grams. It is identified by the AMF magnet part number 23023A.


Uses for our rare earth ring magnets:

This Diametrically magnetised Ring is small and able to withstand higher than average operating temperatures (up to 180 °C) due to its UH Magnetic Grade that is applied in the factory. Magnets with these unusual characteristics are mostly found in specially designed equipment or in experimental and scientific research fields. Industrial or Aeronautical sensing devices and gauges where unusual movements need to be monitored may use diametrically magnetised rings in their operation. Permanent magnets can be influenced by electromagnetic fields and electrical charges to create a physical response or reaction. This phenomenon is applied throughout the modern electronics, computing and telecommunications industries.

Neodymium Ring Magnet - 5mm x 2.5mm x 4mm | N42UH | Diametrically Magnetised (23023A)

Grade
N42UH N/A
Max Operating Temperature °C
<=180 N/A
Remanence Br(T)
1.26-1.29 N/A
Remanence Br(kGs)
12.6-12.9 N/A
Coercivity bHc(kA/m)
>=955 N/A
Coercivity bHc(Oe)
>=12 N/A
Intrinsic Coercivity iHc(kA/m)
>=1990 N/A
Intrinsic Coercivity iHc(Oe)
>=25 N/A
Max Energy Product(BH)max(KJ/m)
302-326 N/A
Max Energy Product(BH)max(MGOe)
38-41 N/A
Grade N42UH N/A
Max Operating Temperature °C <=180 N/A
Remanence Br(T) 1.26-1.29 N/A
Remanence Br(kGs) 12.6-12.9 N/A
Coercivity bHc(kA/m) >=955 N/A
Coercivity bHc(Oe) >=12 N/A
Intrinsic Coercivity iHc(kA/m) >=1990 N/A
Intrinsic Coercivity iHc(Oe) >=25 N/A
Max Energy Product(BH)max(KJ/m) 302-326 N/A
Max Energy Product(BH)max(MGOe) 38-41 N/A

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.

average rating 5.0 out of 5
Based on 1 review
  • 5 Stars
    1 Review
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100% of reviewers would recommend this product to a friend
1 Review
Reviewed by Tristan
I recommend this product
Rated 5 out of 5
Review posted

good quality

Arrived on time an tracking update was excellent.

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Neodymium Ring Magnet - 5mm x 2.5mm x 4mm | N42UH | Diametrically Magnetised

Magnetic Product Description:

This small rare earth ring magnet has an outside diameter of 5mm, an inside diameter of 2.5mm and a thickness of 4mm. It has a pull force of 710 grams. It is identified by the AMF magnet part number 23023A.


Uses for our rare earth ring magnets:

This Diametrically magnetised Ring is small and able to withstand higher than average operating temperatures (up to 180 °C) due to its UH Magnetic Grade that is applied in the factory. Magnets with these unusual characteristics are mostly found in specially designed equipment or in experimental and scientific research fields. Industrial or Aeronautical sensing devices and gauges where unusual movements need to be monitored may use diametrically magnetised rings in their operation. Permanent magnets can be influenced by electromagnetic fields and electrical charges to create a physical response or reaction. This phenomenon is applied throughout the modern electronics, computing and telecommunications industries.

Neodymium Ring Magnet - 5mm x 2.5mm x 4mm | N42UH | Diametrically Magnetised (23023A)

Grade
N42UH N/A
Max Operating Temperature °C
<=180 N/A
Remanence Br(T)
1.26-1.29 N/A
Remanence Br(kGs)
12.6-12.9 N/A
Coercivity bHc(kA/m)
>=955 N/A
Coercivity bHc(Oe)
>=12 N/A
Intrinsic Coercivity iHc(kA/m)
>=1990 N/A
Intrinsic Coercivity iHc(Oe)
>=25 N/A
Max Energy Product(BH)max(KJ/m)
302-326 N/A
Max Energy Product(BH)max(MGOe)
38-41 N/A
Grade N42UH N/A
Max Operating Temperature °C <=180 N/A
Remanence Br(T) 1.26-1.29 N/A
Remanence Br(kGs) 12.6-12.9 N/A
Coercivity bHc(kA/m) >=955 N/A
Coercivity bHc(Oe) >=12 N/A
Intrinsic Coercivity iHc(kA/m) >=1990 N/A
Intrinsic Coercivity iHc(Oe) >=25 N/A
Max Energy Product(BH)max(KJ/m) 302-326 N/A
Max Energy Product(BH)max(MGOe) 38-41 N/A

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.

average rating 5.0 out of 5
Based on 1 review
  • 5 Stars
    1 Review
  • 4 Stars
    0 Reviews
  • 3 Stars
    0 Reviews
  • 2 Stars
    0 Reviews
  • 1 Star
    0 Reviews
100% of reviewers would recommend this product to a friend
1 Review
Reviewed by Tristan
I recommend this product
Rated 5 out of 5
Review posted

good quality

Arrived on time an tracking update was excellent.

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