Plastic sleeve

[Torchy]

Last year there was a thread about plastic sleeving to help lubricate the kite pole moving in and out. I can't find it.

What sort of plastic tube do people use? It needs to wear slowly and allow carbon to move past it, sometimes under some pressure

[Andrew Whapshott]

Delrin or Nylon I think, I made some great Delrin sheaves once

[paul_croote]

When I built Marmite I could not find a tube the right size either so cut a strip 20 mm x 6mm  soft flexible plastic i had (similar in nylon). I bent it into a circle and kept trimming were the ends met until it would just start to fit in the tube. I then wiped some epoxy around the outside and hammered it in using a flat block of wood and a hammer until it was flush with face of the tube. Not being a tube and nylon not being very easy to bond I was not sure it would last but it seems find and marmite is 1 and 1/2 now.

[Torchy]

Thanks guys

[Phil Alderson]

Most kitchen chopping boards are a low cost source of Nylon in sheet form