Question 1

Can the magnets be shipped by air?

Accepted Answer

Absolutely, and multiple times too. Our magnets are documented to conform with IATA's packing instruction 953, and are NOT classified as dangerous goods when shipped in original tool cases. The cases provide built-in magnetic shielding so the article is not restricted as a magnetized material.

Question 2

How is the holding force rating defined?

Accepted Answer

Every single magnet is tested at the factory to ensure that the holding force is well above the rating. This is measured by pulling the magnet perpendicularly from a 30 mm thick, clean mild steel plate. In real life, holding force will be affected by steel thickness, steel quality, and gap between magnet and steel caused by rust or uneven surfaces.

Question 3

What is the lateral holding force?

Accepted Answer

There is no definite answer — it depends on the friction coefficient between the magnet and surface. Important factors are paint, marine growth, corrosion, and whether the surface is wet or dry. As a rule of thumb, you can assume 20–30% of the normal holding force rating.

Question 4

Will the magnets demagnetize?

Accepted Answer

Our magnets don't demagnetize, as long as you keep the magnets below 100 °C (212 °F) and follow the instructions in the user manual.

Question 5

Can you do custom designs?

Accepted Answer

Yes, of course. We control all aspects of the design and magnetic calculations, and have delivered tailored magnets in the past. Send us an e-mail with some specifications, and we'll get right to it.

Question 6

Are there any health hazards with such strong magnets?

Accepted Answer

The magnetic field is not strong enough to pose any health hazard. 1 Tesla equals 10 000 Gauss. The flux density close to a diving magnet is in the range of a few milligauss, while an MR scanner produces several Tesla — ten million times stronger than our magnets.

Question 7

Aren't they difficult to remove by hand?

Accepted Answer

Not really. Our diving magnets are designed to be removed with one hand using the release lever. The strongest diving magnet, Willy 800 kg, requires around 30 kg pull force to release it — and that's only momentarily. Once you have turned the lever a tiny bit, the rest is easy.

Question 8

Can the magnets damage any electronic equipment?

Accepted Answer

Generally, the only equipment sensitive to magnetic fields is equipment that relies on magnetism itself. A magnetic compass contains a needle that can be permanently altered by a strong external field — most smartphones contain compasses, which is why we recommend keeping them away. When the magnet is attached to a steel surface, the field becomes concentrated in that steel and the external field drops dramatically.

Frequently Asked Questions

Still have questions?