Sub culture wrote:The nicest plastic to machine is acetal/delrin. Is a very accurate plastic that doesn't tend to 'grow' as you machine it, but is also tricky to bond, and is quite expensive.
JWLaRue wrote:Agree...and it also absorbs water. (IIRC something like 0.25%) Not much, but depending on your machining tolerances it can be an issue. (It's caught me in the past)
Sub culture wrote:Explaining how to make endcaps in written form is rather difficult to do in a concise and easy to understand format, because there are a few topics to address.
Providing you are competent with turning on a lathe i.e. you understand the basics of work holding, centreing tools etc. It then leaves a requirement to understand how to size o-rings, and dimension the grooves for them to sit in, getting sufficient o-ring squish to effect a decent seal. As such this really needs to be addressed visually. A small video is the best way, and it is something I've been meaning to do for a little while, as I think this the area that most sub modellers find intimidating.
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