Recent content by sw20

Yeah, McMaster detail drawings aren't always quite right, though, so I don't know how trustworthy that is. They do have clearly marked sides, with matching-marks being VERY attracted to each other and non-marked sides repelling. No, they don't twist, which I also initially thought might be...

https://www.mcmaster.com/2494N17 Ring magnet is a magnet with a hole in the middle, like a donut.

Hi all, I'm working with a pair of multi-pole neodymium ring magnets (rated ~119lbF) and finding that if the opposing poles are forced together, with the magnets in alignment, that at very close range (may be a millimeter or two apart?) the two magnets will suddenly snap together as if one has...