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4.9 Customer reviews

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Same Day Dispatch Mon-Fri before 3pm (NZST)

4.9 Customer reviews

30 Day Returns Shop with confidence

Same Day Dispatch Mon-Fri before 3pm (NZST)

4.9 Customer reviews

30 Day Returns Shop with confidence

Same Day Dispatch Mon-Fri before 3pm (NZST)

4.9 Customer reviews

30 Day Returns Shop with confidence

Neodymium Block Magnet - 20mm x 20mm x 12mm

Name: Neodymium Block Magnet - 20mm x 20mm x 12mm
Brand: AMF NZ
SKU: 22015
Price: 28.39 NZD
Availability: InStock
Rating: 5.0 (5 reviews)

Product code: 22015

Neodymium Block Magnet - 20mm x 20mm x 12mm - AMF Magnets New Zealand

1 to 9 items

$28.39

10 to 99 items23% OFF

$21.61

100+ items41% OFF

$16.60

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$28.39

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Neodymium Block Magnet - 20mm x 20mm x 12mm

Rated 5.0 out of 5

Based on 5 reviews

Product Code 22015

Pull Force* 14.8 kg

Weight 36 gm

Style Neodymium square Block magnet

Coating Nickel (NiCuNi)

Direction of Magnetisation Axially magnetised

Dimensions Width:20mm, Height:12mm, Length:20mm

*Measured against up to 10mm mild steel.

Magnetic Product Description:

This magnet has a length and width of 20mm and a height of 12mm. It has a magnetic flux of 4606 Gauss and a pull force of 14.8kg against 5mm mild steel. It uses AMF magnet part number 22015.

Uses for our neodymium block magnets:

Designers and their clients have a growing need for products that are easy to service, clean and dismantle for transportation or storage.

Magnets bond to metal or each other without penetrating the host materials and have little or no effect on the structural integrity of the surface they adhere to. Nails, pins, rivets, screws and bolts, by nature and design, pierce surfaces. Glues deface plastics when dismantled. Penetration weakens or fatigues plastics at the point of entry and facilitates moisture access as well as compromising the uniformity and integral strength of plastic materials. This popular magnet is used by boat manufacturers, industrial part suppliers, shopfitters, material handling companies and is regularly purchased by a V8 Supercar race engineering team who require the unique instant hold, and instant release qualities that magnets of the correct size and strength provide.

Small and compact in size this magnet is still powerful and should be handled with care!

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

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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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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

Magnetic Product Description:

This magnet has a length and width of 20mm and a height of 12mm. It has a magnetic flux of 4606 Gauss and a pull force of 14.8kg against 5mm mild steel. It uses AMF magnet part number 22015.

Uses for our neodymium block magnets:

Designers and their clients have a growing need for products that are easy to service, clean and dismantle for transportation or storage.

Magnets bond to metal or each other without penetrating the host materials and have little or no effect on the structural integrity of the surface they adhere to. Nails, pins, rivets, screws and bolts, by nature and design, pierce surfaces. Glues deface plastics when dismantled. Penetration weakens or fatigues plastics at the point of entry and facilitates moisture access as well as compromising the uniformity and integral strength of plastic materials. This popular magnet is used by boat manufacturers, industrial part suppliers, shopfitters, material handling companies and is regularly purchased by a V8 Supercar race engineering team who require the unique instant hold, and instant release qualities that magnets of the correct size and strength provide.

Small and compact in size this magnet is still powerful and should be handled with care!

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

Sort by

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