
Originally Posted by
Matus
Vangelis - when the force will get too large it will be unpleasant to put or remove the knife from the bar and you will increase the risk of damaging the blade. In general it is not a bad idea to get stronger magnets - you can then tune the resulting force by varying the thickness of the wood between the knife and the magnet.
The best shape of magnets IMO would be rectangular - about 1cm wide and 5mm thick (length is not relevant) placed along each other in a row without any (or only very small - less than 10 mm) gap. And using 2 of such rows few cm apart - that will give completely homogeneous force over the whole length of the bar and because there are 2 rows and not just one - heavier knives will not have the tendency to swing or tilt under their own weight.