I picked up a second hand drafting machine and, upon closer inspection, discovered that all the nylon guide wheels have a split in them.

They're about 30mm in diameter, with a metal bearing in the middle, and a nylon "tyre". I tried to fill the split with some epoxy, and it's helped a bit, but I think they're also a bit out of round as well.

Can anyone point me in the right direction where I might be able to find replacements? I had a look at the door roller section at bunnies, but nothing was quite right.


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