Re: Stuck Springs
Posted: Tue Oct 19, 2021 12:45 pm
https://forum.talkingmachine.info/
If using graphite, what grade, purity, particle size? Use any old powdered graphite? What was the original specification? I seriously doubt whether it's still available, as there are far less varied applications for powdered graphite nowadays. And vaseline/petroleum jelly just stores up repeat problems since, as so many other people have said, it will degrade over time, plus it has nothing like the lubricity of modern materials. Original isn't always best.
I honestly don't know specifically Jeff (despite having been a rubber technologist in a former life!) other than that it sounds better to my ears, and I know other enthusiasts who find the same. Technically it must be some combination of hardness, resilience and compression set. Resilience in the context of rubber meaning rebound (bounce), nothing to do with ideas of robustness or resistance (the colloquial/general meaning). Compression set is the degree of (non-)recovery of the rubber after it has been in compression for a long time, an indirect indication of the long-term return force it continues to exert whilst compressed. It would take a lot of near-pointless research to work out how those properties and more relate to the job that gaskets do!JeffR1 wrote: Tue Oct 19, 2021 4:41 pm About the rubber tubing, why don't you like the silicon stuff , what is it about the natural rubber that is better ?
I just use graphite grease, already made. I don't add graphite to grease. I can't give you any specs, (for which I apparently may be murdered), I can just tell you that it works great. If the grease appears a bit thick, I thin it by adding a bit of oil and mixing it in.Orchorsol wrote: Tue Oct 19, 2021 1:11 pmIf using graphite, what grade, purity, particle size? Use any old powdered graphite? What was the original specification? I seriously doubt whether it's still available, as there are far less varied applications for powdered graphite nowadays. And vaseline/petroleum jelly just stores up repeat problems since, as so many other people have said, it will degrade over time, plus it has nothing like the lubricity of modern materials. Original isn't always best.
Yet - conversely, I never use that white silicone rubber tubing for soundbox gaskets - always natural rubber!
Perhaps not literally, but they are arranged in such a way that only one spring is attached to the crank through the centre shaft.JerryVan wrote: Tue Feb 08, 2022 3:56 pm I guess one doesn't have to wind their triple spring motors beyond the first spring, but what's the point of having a triple spring motor if one can't make use of all three springs.
One could also change the springs around and install the first spring in a fashion to which it gets wound last and install the last spring so it gets would first.
How is it that, regardless of lubricant recipe, you can envision a 3 spring motor, winding one spring at a time?