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FAQ - Frequently Asked Questions

Which magnets are suitable for knife racks?

We carry a nice selection of magnetic knife racks and knife blocks in our shop:
Go to knife racks

If you want to make one yourself, the following tips are hopefully useful to you.

Which magnets are suitable for DIY projects?

That depends, of course, on your specific implementation. Generally, we recommend S-15-08-N or even S-20-10-N disc magnets, if magnet and knife don't have direct contact.
In most cases, people drill holes in the backside of the wood and glue the magnets into them. You can't see the magnets from the front, but the adhesive force decreases with distance.
If you hang a knife onto a board that is drilled into the wall, you are only able to put approx. 5 times less weight on the magnet than we indicated. Please note our FAQ about shear force.

Distance between magnet and knife

The following numbers illustrate how important the distance between magnet and knife and the shear force are during planning:
S-15-08-N:
Adhesive force directly in direction of tension: 6,7 kg
Adhesive force with 2 mm wood in direction of tension: 2,0 kg
Adhesive force with 2 mm wood in direction of shear force: 0,4 kg
Adhesive force with 5 mm wood in direction of tension: 0,5 kg
Adhesive force with 5 mm wood in direction of shear force: 0,1 kg
S-20-10-N:
Adhesive force directly in direction of tension: 12,0 kg
Adhesive force with 2 mm wood in direction of tension: 4,0 kg
Adhesive force with 2 mm wood in direction of shear force: 0,8 kg
Adhesive force with 5 mm wood in direction of tension: 1,5 kg
Adhesive force with 5 mm wood in direction of shear force: 0,3 kg
Adhesive force curve of S-15-08-N
It all comes down to the distance. We recommend a maximum distance of 3 mm between magnet and knife.
With many of the larger magnets, a curve the of adhesive force development over distance is listed in the web shop (see example on the left).
Normally, one magnet per knife is sufficient. With heavy knives (more than 100 g) you should use 2 magnets per knife, just to be on the safe side.
It's best for you to do your own fine-tuning. How well the knives should hold on the board is subjective. Start with 3 mm wood between magnet and knife and then, if necessary, reduce the distance to 2 mm or even 1 mm, before you finally glue on the magnets.
The most simple construction is for magnets and knives to have direct contact. You can see such a knife rack on the left.
Please browse through our collection of magnet applications with knives to get a feel for the various possibilities.