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Neodymium Block - 20mm x 20mm x 12mm Neodymium Block - 20mm x 20mm x 12mm Neodymium Block - 20mm x 20mm x 12mm Neodymium Block - 20mm x 20mm x 12mm Cart
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4.9 Customer reviews
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Same Day Dispatch Mon-Fri before 7pm (PST)
4.9 Customer reviews
30 Day Returns Shop with confidence
Same Day Dispatch Mon-Fri before 7pm (PST)
4.9 Customer reviews
30 Day Returns Shop with confidence

Neodymium Block - 20mm x 20mm x 12mm

Product code: 22015

Neodymium Block - 20mm x 20mm x 12mm
Neodymium Block - 20mm x 20mm x 12mm
1 to 9 items
$23.71
10 to 99 items24% OFF
$18.05
100+ items42% OFF
$13.87
Total
$23.71
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Neodymium Block - 20mm x 20mm x 12mm
Rated 5.0 out of 5
Based on 5 reviews
Product Code 22015
Pull Force* 14.8 kg
Weight 36gm
Style Neodymium Block
Gauss 4606
Grade N38
Coating Nickel (NiCuNi)
Direction of Magnetisation Axially magnetized
Dimensions Width:20mm, Length:20mm, Height:12mm
*Measured against up to 10mm mild steel.

Product Description:

This magnet measures 20 mm x 20 mm x 12 mm high. It has a magnetic flux of 4606 Gauss and a pull force of 14.8kg against 5mm mild steel.

Uses for our neodymium block magnets:

This is a good multi-purpose magnet which is regularly used in schools and specialist design firms.

Write a Review
average rating 5.0 out of 5
Based on 5 reviews
  • 5 Stars
    5 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
5 Reviews
Reviewed by John K.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

Nice magnets used to hold posters

These magnets are large enough to manipulate with your fingers. Great

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

Very Powerful Magnets

I purchased these magnets for use in an internal training course for work to show how metals behave in the presence of a magnetic field. These magnets are small enough to drop through a roll of aluminium foil to demonstrate the bahaviour.

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Reviewed by Daynan e.
I recommend this product
Rated 5 out of 5
Review posted

Fixed it

I used the magnet to fix my shonky oven door

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Reviewed by William R.
I recommend this product
Rated 5 out of 5
Review posted

900W+ resistance

I ride my track bicycle on rollers for training purposes. While rollers give a very realistic riding experience, and are good for pedaling technique, they don't provide enough resistance for building muscle power. One ends up maxing out leg speed (this happens for me at 160-170 rpm) before running out of strength.

Mounting a magnet very close (2mm or less) to the aluminium roller surface generates eddy currents in the roller when it spins. The eddy currents generate an electric field that interacts with the block magnet's magnetic field to generate a force that acts to slow the rollers down, converting the rider's effort into heat due to electrical resistance to the eddy current. The force provided increases linearly with the roller speed, so the faster one rides, the more resistance one feels.

The three Neodymium block magnets I purchased from AMF Magnetics currently provide my rollers with over 900W of resistance @ 150rpm which is all my current fitness and strength can handle. With consistent training, I hope to need another magne

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

900W+ resistance

I ride my track bicycle on rollers for training purposes. While rollers give a very realistic riding experience, and are good for pedaling technique, they don't provide enough resistance for building muscle power. One ends up maxing out leg speed (this happens for me at 160-170 rpm) before running out of strength.

Mounting a magnet very close (2mm or less) to the aluminium roller surface generates eddy currents in the roller when it spins. The eddy currents generate an electric field that interacts with the block magnet's magnetic field to generate a force that acts to slow the rollers down, converting the rider's effort into heat due to electrical resistance to the eddy current. The force provided increases linearly with the roller speed, so the faster one rides, the more resistance one feels.

The three Neodymium block magnets I purchased from AMF Magnetics currently provide my rollers with over 900W of resistance @ 150rpm which is all my current fitness and strength can handle. With consistent training, I hope to need another magnet by the end of the year.

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Was this helpful?

No FAQ available

Product Description:

This magnet measures 20 mm x 20 mm x 12 mm high. It has a magnetic flux of 4606 Gauss and a pull force of 14.8kg against 5mm mild steel.

Uses for our neodymium block magnets:

This is a good multi-purpose magnet which is regularly used in schools and specialist design firms.

Write a Review
average rating 5.0 out of 5
Based on 5 reviews
  • 5 Stars
    5 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
5 Reviews
Reviewed by John K.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

Nice magnets used to hold posters

These magnets are large enough to manipulate with your fingers. Great

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

Very Powerful Magnets

I purchased these magnets for use in an internal training course for work to show how metals behave in the presence of a magnetic field. These magnets are small enough to drop through a roll of aluminium foil to demonstrate the bahaviour.

Loading...
Was this helpful?
Reviewed by Daynan e.
I recommend this product
Rated 5 out of 5
Review posted

Fixed it

I used the magnet to fix my shonky oven door

Loading...
Was this helpful?
Reviewed by William R.
I recommend this product
Rated 5 out of 5
Review posted

900W+ resistance

I ride my track bicycle on rollers for training purposes. While rollers give a very realistic riding experience, and are good for pedaling technique, they don't provide enough resistance for building muscle power. One ends up maxing out leg speed (this happens for me at 160-170 rpm) before running out of strength.

Mounting a magnet very close (2mm or less) to the aluminium roller surface generates eddy currents in the roller when it spins. The eddy currents generate an electric field that interacts with the block magnet's magnetic field to generate a force that acts to slow the rollers down, converting the rider's effort into heat due to electrical resistance to the eddy current. The force provided increases linearly with the roller speed, so the faster one rides, the more resistance one feels.

The three Neodymium block magnets I purchased from AMF Magnetics currently provide my rollers with over 900W of resistance @ 150rpm which is all my current fitness and strength can handle. With consistent training, I hope to need another magne

Loading...
Was this helpful?
Reviewed by William R.
I recommend this product
Rated 5 out of 5
Review posted

900W+ resistance

I ride my track bicycle on rollers for training purposes. While rollers give a very realistic riding experience, and are good for pedaling technique, they don't provide enough resistance for building muscle power. One ends up maxing out leg speed (this happens for me at 160-170 rpm) before running out of strength.

Mounting a magnet very close (2mm or less) to the aluminium roller surface generates eddy currents in the roller when it spins. The eddy currents generate an electric field that interacts with the block magnet's magnetic field to generate a force that acts to slow the rollers down, converting the rider's effort into heat due to electrical resistance to the eddy current. The force provided increases linearly with the roller speed, so the faster one rides, the more resistance one feels.

The three Neodymium block magnets I purchased from AMF Magnetics currently provide my rollers with over 900W of resistance @ 150rpm which is all my current fitness and strength can handle. With consistent training, I hope to need another magnet by the end of the year.

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Was this helpful?

No FAQ available