Hi wouldchuck,
they were an ebay buy can't remember the source there are a few - how wrong can you go with magnets?
they are 2mm deep by 5mm diameter - they hold very strong - if they touch. they seem to quickly lose power if they are separated by more than a hair - but then they are very small. as they were so small they were very fiddly to adjust so i didn't i justdrilled very carefully with an egg whisk hand drill and measured progress with vernier caliper - mine have a little prong that sticks out the bottom for this. no glue required just poked them in
to get them apart if they are too strong you just slide them off each other rather than trying to pull them apart so maybe design your lid to be able to slide a bit
it was only about five quid for twenty including postage so peanuts really - suggest you get some and have a play on a test piece to see how strong they are - you can get them out easy enough with a chisel if you dont glue them in
good luck
they were an ebay buy can't remember the source there are a few - how wrong can you go with magnets?
they are 2mm deep by 5mm diameter - they hold very strong - if they touch. they seem to quickly lose power if they are separated by more than a hair - but then they are very small. as they were so small they were very fiddly to adjust so i didn't i justdrilled very carefully with an egg whisk hand drill and measured progress with vernier caliper - mine have a little prong that sticks out the bottom for this. no glue required just poked them in
to get them apart if they are too strong you just slide them off each other rather than trying to pull them apart so maybe design your lid to be able to slide a bit
it was only about five quid for twenty including postage so peanuts really - suggest you get some and have a play on a test piece to see how strong they are - you can get them out easy enough with a chisel if you dont glue them in
good luck