Neodymium Block Magnet - 20mm x 12mm x 5mm | with 4.5mm hole

Product code: 22021D

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Neodymium Block Magnet - 20mm x 12mm x 5mm | with 4.5mm hole

Rated 5.0 out of 5
Based on 2 reviews
Product Code 22021D
Pull Force* 5 kg
Weight 9 gm
Style Neodymium Block magnet
Gauss 3335
Grade N38
Coating Nickel (NiCuNi)
Direction of Magnetisation Axially magnetised
Dimensions Width:12mm, Height:5mm, Length:20mm
*Measured against up to 10mm mild steel.
Neodymium Block Magnet - 20mm x 12mm x 5mm | with 4.5mm hole

Magnetic Product Description:

This rare earth magnet has a length of 20mm, a width of 12mm and a thickness of 5mm. It has a magnetic flux reading of 3335 gauss and an approx: pull force of 5kg. It is identified by the AMF magnet part number 22021D. Like the epoxy coated magnet of similar size this magnet has a 4.5mm hole centred thru the magnet.


Uses for our rare earth block magnets:

This Neodymium block magnet has a 4.5mm diameter straight-sided hole through its centre making it an incredibly versatile and handy magnet. Able to be attached using a bolt, screw or threaded onto a bracket, this magnet is popular with maintenance workers, builders, steel fabricators, and hobbyists. The straight-sided hole also allows for less conventional uses where the magnets are stitched into textiles such as furniture makers, interior designers and even fashion designers.

Neodymium Block Magnet - 20mm x 12mm x 5mm | with 4.5mm hole (22021D)

Grade
N38 N/A
Max Operating Temperature °C
<=80 N/A
Remanence Br(T)
1.23-1.3 N/A
Remanence Br(kGs)
12.3-13 N/A
Coercivity bHc(kA/m)
>=859 N/A
Coercivity bHc(Oe)
>=10.8 N/A
Intrinsic Coercivity iHc(kA/m)
>=955 N/A
Intrinsic Coercivity iHc(Oe)
>=12 N/A
Max Energy Product(BH)max(KJ/m)
286-318 N/A
Max Energy Product(BH)max(MGOe)
36-40 N/A
Grade N38 N/A
Max Operating Temperature °C <=80 N/A
Remanence Br(T) 1.23-1.3 N/A
Remanence Br(kGs) 12.3-13 N/A
Coercivity bHc(kA/m) >=859 N/A
Coercivity bHc(Oe) >=10.8 N/A
Intrinsic Coercivity iHc(kA/m) >=955 N/A
Intrinsic Coercivity iHc(Oe) >=12 N/A
Max Energy Product(BH)max(KJ/m) 286-318 N/A
Max Energy Product(BH)max(MGOe) 36-40 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 2 reviews
  • 5 Stars
    2 Reviews
  • 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
2 Reviews
Reviewed by MICK
I recommend this product
Rated 5 out of 5
Review posted

BRIAN TAYLOR MOSQUITO

VERY GOOD USED THEM ON SIDE OF MILLING MACHINE TO HOLD AIRLINE IN PLACE

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Reviewed by Bill T.
I recommend this product
Rated 5 out of 5
Review posted

Excellent Service

Excellent magnets and Excellent Service

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Neodymium Block Magnet - 20mm x 12mm x 5mm | with 4.5mm hole

Magnetic Product Description:

This rare earth magnet has a length of 20mm, a width of 12mm and a thickness of 5mm. It has a magnetic flux reading of 3335 gauss and an approx: pull force of 5kg. It is identified by the AMF magnet part number 22021D. Like the epoxy coated magnet of similar size this magnet has a 4.5mm hole centred thru the magnet.


Uses for our rare earth block magnets:

This Neodymium block magnet has a 4.5mm diameter straight-sided hole through its centre making it an incredibly versatile and handy magnet. Able to be attached using a bolt, screw or threaded onto a bracket, this magnet is popular with maintenance workers, builders, steel fabricators, and hobbyists. The straight-sided hole also allows for less conventional uses where the magnets are stitched into textiles such as furniture makers, interior designers and even fashion designers.

Neodymium Block Magnet - 20mm x 12mm x 5mm | with 4.5mm hole (22021D)

Grade
N38 N/A
Max Operating Temperature °C
<=80 N/A
Remanence Br(T)
1.23-1.3 N/A
Remanence Br(kGs)
12.3-13 N/A
Coercivity bHc(kA/m)
>=859 N/A
Coercivity bHc(Oe)
>=10.8 N/A
Intrinsic Coercivity iHc(kA/m)
>=955 N/A
Intrinsic Coercivity iHc(Oe)
>=12 N/A
Max Energy Product(BH)max(KJ/m)
286-318 N/A
Max Energy Product(BH)max(MGOe)
36-40 N/A
Grade N38 N/A
Max Operating Temperature °C <=80 N/A
Remanence Br(T) 1.23-1.3 N/A
Remanence Br(kGs) 12.3-13 N/A
Coercivity bHc(kA/m) >=859 N/A
Coercivity bHc(Oe) >=10.8 N/A
Intrinsic Coercivity iHc(kA/m) >=955 N/A
Intrinsic Coercivity iHc(Oe) >=12 N/A
Max Energy Product(BH)max(KJ/m) 286-318 N/A
Max Energy Product(BH)max(MGOe) 36-40 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 2 reviews
  • 5 Stars
    2 Reviews
  • 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
2 Reviews
Reviewed by MICK
I recommend this product
Rated 5 out of 5
Review posted

BRIAN TAYLOR MOSQUITO

VERY GOOD USED THEM ON SIDE OF MILLING MACHINE TO HOLD AIRLINE IN PLACE

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Was this helpful?
Reviewed by Bill T.
I recommend this product
Rated 5 out of 5
Review posted

Excellent Service

Excellent magnets and Excellent Service

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Was this helpful?