Gallery, Projects and General > Project Logs
Smart and Brown Lathe Crosslide Screw Renewal
Darren:
Good point John, Teflon deff out then, I read somewhere that it's neither a true solid or liquid, something in between, like glass.
But you could have a point with Delrin as well...umm... :thumbup:
CrewCab:
--- Quote from: Darren on November 22, 2008, 11:09:13 AM ---Opps, bit of underlining there...!!
--- End quote ---
You can always nip back in and edit your post Darren
Phosphor bronze has been used for this sort of application almost since the stone age, and for good reason I suspect. ........... I used Delrin for the cylinder of a tiny model engine and whilst it ran well enough the thread for the securing bolt didn't last too long.
CC
Darren:
Thanks, I was just thinking of experimenting just to see and learn really.
Anyway, for tonight I cut one of the nuts, from PB1 btw
Started with a piece of scrap that I'd been playing with recently
Turned it down to size and threaded it, thought I'd taken a pic but it seems not.... :hammer:
It needed a retaining slot to stop it spinning, I'm a little low on milling cutters and didn't have one small enough (some on the way in the post)
So I decided to give this a go in the lathe. It's a HHS parting tool on its side.
Not the neatest job I'll admit, Had to take very light cuts and take it real slow.....but it seemed to have worked.
It even fits the thread too, handy that...... :D Feels nice and smooth as well, the original screw was kinda rough.
Well that's it for tonight, a bit further on. Now I need to order some 35mm PB1 for the other nut....
Darren
bogstandard:
Darren,
That is looking real well.
I see you are discovering methods all by yourself. Cutting the one off side groove on a lathe is almost exactly how it is normally done.
I see we have a natural machinist coming along here.
John
Darren:
"almost" feel free to educate me :D
I seem to remember seeing it somewhere cutting internally, broaching I think it was called? Possibly cutting a gear.
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