Re: [CAD_CAM_EDM_DRO] fine-pitch threadcutting on thinwall tubing

First, of all, I'd start with "thick-walled" tubing, and machine it to the
proper I.D., and single-point thread it, then, I'd turn the O.D. to req'd
dimension, and thread it, then I'd use a good parting tool to cut thin-wall
free from thick-wall. The reason for the thick-wall, in the first place is
for rigidity, when you chuck it up (thin-wall will distort
catastrophically!). Secondly, you probably can't buy thin-walled tubing to
your exacting spec's (I.D. & O.D.), so, you may as well make it yourself.
But, you'll soon see why the machinist has to charge so much. Contact me
off-list, if you need help setting up your lathe for threading.

Hope This Helps.

RayHex

----------

> From: Multi-Volti Devices (Murray) <multi-volti@...>

> Anyone here have the ability to thread thinwall metal tubing with fine

pitch

> threads (like camera filters). Inside as well as outside?
>
> I at first imagined one needed really weird taps & dies, but it occurred

to

> me that maybe it's just done with a cuttign tool on a lathe.
>
> Then the question is...how does one obtain the right diameter tubing? I
> imagine there are a limited number of sizes, and metric is another

problem.

>
> Oh, by the way, the application is threaded tubes & spacers for optical
> applications.
>
> I found a machininst who does this stuff but it's frightening costly...so

I

> wondered if it is frighteningly difficult.
>
> Thanks
>
> Murray

[Non-text portions of this message have been removed]