I am making a fire piston like this
I am so please with my old lathe - less than 4 tenths out. Not bad on a big lathe turning small parts.
I changed the bore size slightly as I had a 7/16 reamer handy.
So the bore is 7/16 and the piston is 0.420
I bought a nice big mixed set of over 400 O rings. Guess what- none is suitable
The small diameter ones are too small a cross section.
Does anyone know an easy way to work out the depth of groove etc and where to buy suitable o rings?
YouTube
www.youtube.com
YouTube
www.youtube.com
I am so please with my old lathe - less than 4 tenths out. Not bad on a big lathe turning small parts.
I changed the bore size slightly as I had a 7/16 reamer handy.
So the bore is 7/16 and the piston is 0.420
I bought a nice big mixed set of over 400 O rings. Guess what- none is suitable
The small diameter ones are too small a cross section.
Does anyone know an easy way to work out the depth of groove etc and where to buy suitable o rings?