The Shop > Tools
Boley 4LV
awemawson:
So what advantage has the graphite over bronze, or mild steel even?
When the air is applied shaft and housing do not contact each other, so it is only if the air supply fails when the spindle is still driven that there is any issue, and a pressure switch and air reservoir should cope with that contingency :scratch:
mattinker:
The advantage over metals is that is porous so the compressed air doesn't depend upon drillings to to create the cushion of air and that it is possible to bore it accurately by hand. With a chrome plated rod there would be no risk of corrosion!
awemawson:
Sintered bronze bushes are porous so don't rule them out if the graphite isn't forthcoming (need to flush the lube out first though)
mattinker:
Andrew,
Thanks for the idea, I've found another solution, 4x100mm squares, 25mm thick that I can stack to get the size I want. Off to order an off-cut of chromed bar!
Cheers, Matthew
RotarySMP:
Thanks for posting the Ferosilicon ratio.
The threadjack doesn't bother me, but a project as cool as a home made air spindle for the Clarkson it worthy of it's own thread. I'll be watching out for that, as I have a Clarkson as well.
Mark
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