Re: Machining Delrin


Andrew Werby wrote:
> <Searcher7@xxxxxxxxxxxxx> wrote in message
> news:1136425294.968165.73010@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> >
> > Mike Henry wrote:
> >> <Searcher7@xxxxxxxxxxxxx> wrote in message
> >> news:1136162540.747826.15860@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> >> >I have a lot of small parts I'd like to make and I read that
> >> > woodworking tools would work on Delrin.
> >> >
> >> > But since dimensional accuracy is important, I was wondering if I could
> >> > use something like a Dremel lathe(or perhaps a hand held dremel with
> >> > the proper jigs).
> >> >
> >> > Would the Delrin gum up the tooling?
> >> >
> >> > I'm trying to get by without having to save up for major machinery, and
> >> > would appreciate any advice.
> >>
> >> I turned some 7/16" Delrin rod down to 7/32 the other night at about 1200
> >> rpm using a freshly ground HSS bit. That seemed to work fine so maybe it
> >> will give you an idea of what sort of speeds will work.
> >>
> >> What do you define as major machinery and what sort of budget do you have
> >> for tools?
> >
> > As far as what I define as major machinery, that would be anything I
> > can't keep in my room. :-) And as for a budget, what's that? :-)
> >
> > Since I'll be working with Delrin and stainless steel I have been
> > looking for the necessary tools to accomplish what I want to do. I
> > recently won a Rotabroach on eBay and I think that perhaps I should get
> > a micro-mill next.
> >
> >> I've never seen or used a Dremel lathe, but suspect that it hass too much
> >> runout for much accuracy and the surface finsh won't be too pretty. It
> >> also probably won't work very well if you need to turn down some 2" OD
> >> Delrin rod.
> >
> > Here's a Dremel Lathe:
> > http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=6026058544
> >
> > I've also recently won bunches of Delrin rods on eBay. The largest
> > diameter being .750".
> >
> > I figured that it was a long shot, but I was looking into possibly
> > making some of the smaller parts I need with the Dremel lathe.
> >
> >> Maybe I missed an earlier reply from you but did you ever mention mention
> >> what sort of accuracy you need and what sort of parts you are trying to
> >> make? The answers to those questions would garner much better advice.
> >
> > As for accuracy, how do you gauge that? I want to be able to turn down
> > a Delrin rod to 1/4" diamter and use it as a hinge pin in a 1/4" hole
> > that I also drilled in Delrin.
> >
> > Thanks.
> >
> > Darren Harris
> > Staten Island, New York.
>
> [That seems basically possible to me. I've machined Delrin and it worked
> pretty well. It's harder to clog up a lathe tool than an endmill (which is
> what I was using) so I'd rate your chances of success pretty high. It
> doesn't sound like your tolerances are too tight, but a 1/4" rod would have
> a hard time fitting in a 1/4" hole if everything was exact. You either need
> to make the rod a tiny bit smaller or the hole a little bigger for it to
> function as a hinge. If the hole is drilled, it can be made more round by
> reaming, and the diameter will be more accurate; drilled holes are somewhat
> triangular.]

I just said it that way for simplicity.

I am in the market for a mini-mill and I'm looking make to small parts,
including gears and racks in materials like bronze and Delrin.

Darren Harris
Staten Island, New York.

.

Relevant Pages

  • Re: Machining Delrin
    ... >> As far as what I define as major machinery, ... For machining Delrin, I shoudln't have to worry about the cost. ... >>> I've never seen or used a Dremel lathe, but suspect that it hass too much ... >>> Delrin rod. ...
    (sci.polymers)
  • Re: Machining Delrin
    ... >>> woodworking tools would work on Delrin. ... >> will give you an idea of what sort of speeds will work. ... >> I've never seen or used a Dremel lathe, but suspect that it hass too much ... >> Delrin rod. ...
    (sci.polymers)
  • Re: Machining Delrin
    ... >> Since I'll be working with Delrin and stainless steel I have been ... >>> I've never seen or used a Dremel lathe, but suspect that it hass too much ... >>> Delrin rod. ... > a hard time fitting in a 1/4" hole if everything was exact. ...
    (sci.polymers)
  • Re: Machining Delrin
    ... >>> woodworking tools would work on Delrin. ... >> I've never seen or used a Dremel lathe, but suspect that it hass too much ... >> Delrin rod. ... a hard time fitting in a 1/4" hole if everything was exact. ...
    (sci.polymers)
  • Re: Machining Delrin
    ... >> woodworking tools would work on Delrin. ... > will give you an idea of what sort of speeds will work. ... > What do you define as major machinery and what sort of budget do you have ... Here's a Dremel Lathe: ...
    (sci.polymers)