Originally Posted by
drac1
Worth a try.
One thing to consider though. With a slight ridge, all the rotational friction would be on one small point and may wear the housing excessively.
Yes, although the end is supported by the o-ring and being rotational it should just wear a matching grove and form a really good seal.
Almost a very poor man's shaft micro labyrinth seal???
I just had a quick play with some 20mm dia ally scrap and it didn't take too much effort for it to form up a fairly blunt ridge on each side of the grove, see the tiny light gap in the image. I'm trying to close fractions of a thou so anything's got to be better than nothing?
Ridges next to shallow formed groove, raising end, creating light gap.