Re: [CAD_CAM_EDM_DRO] Re: Alum. Extrusion Manufacturers

Sometimes, I wonder where I can scrape up $600 for anything !!!!

Don't Ya think someone is missing the boat here ???

You'd think they (someone) could re-tool for this and be excited about it.

Every show I've been at, the companies sure seem like they "want" to use it
"side by side" with Linear Components......................


CL

jeffswayze wrote:

> Chris,
> If you're feeling entrepreneurial, you could go to a manufacturer
> and spend about $600 on an extrusion die and have them crank
> out a couple hundred feet of your rail. Sell the chunks on various
> web sites and you could end up making money!
>
> -Jeff
>
> --- In CAD_CAM_EDM_DRO@y..., Chris L <datac@l...> wrote:
> > When it comes to Linear Motion application, "affordable" linear
> motion
> > methods specifically (related to CNC of course), I have
> searched over
> > the past year for just *one* Aluminum Extrusion company who
> has been
> > "innovative" enough to make the Center Hole or Cavity
> (sometimes more
> > than one cavity) of an extrusion, to allow an *easy* insert of one
> of
> > the common Linear Bearing sizes.
> >
> > My goal was this. As many know, typical Round Linear Rail is
> quite
> > affordable. Sellers on E-bay practically give it away if you know
> who to
> > contact. But to afford Linear bearings premounted "IN" linear
> mounting
> > blocks raises the costs involved quite a bit. If you've priced
> Thomson
> > Rail Stands you've likely noticed they are pretty pricey as well.
> >
> > So, For a short travel distance "starter" machine, I hoped to
> find a
> > method where you would use real common Aluminum
> Extrusion sections
> > (short pieces), and press in a Linear Ball or Frelon Lined
> bearing into
> > it. This would allow one to buy just the "inner" portion of the
> bearing
> > and not the aluminum mounting blocks. Frelon gets pretty
> affordable.
> >
> > The beauty of the concept is that you would ALSO use the very
> same
> > extrusion as the stands for the rail (one each end), by turning
> some
> > simple "liners" that again would press into the Cavity of the
> extrusion.
> > The rail could be held in place with a setscrew or two. A 1/4"
> spacer or
> > even machinery feet would go under those end supports to
> allow necessary
> > clearance for the "Slide" sections. And, It would Look good !
> >
> > In the case where one prefers the linear rail to be secured all
> along
> > the length, you could even make your own "open" bearings as I
> have seen
> > some extrusions that offer some real good wall thickness.
> This to me,
> > seems like a really good "economy" - "hobby" - "newbie"
> method to make
> > inexpensive, yet pretty accurate slides.
> >
> >
> > Well, I have looked at using Fractional Extrusion with Fractional
> and
> > Metric Bearings as well as the other way around. Nothing lines
> up worth
> > diddly. I even checked out the dimensions of the extrusions
> used for
> > that new Air Line concept. Nothing lines up very well. Too bad.
> >
> > I am sure there are those "one off" extrusions out there that
> would fill
> > this interesting situation, and I am really sure if you had the
> bucks
> > you could have it made. But then, it probably won't be that really
> > affordable solution we all look for.
> >
> > If you happen to have a chunk of extrusion with a hole bigger
> than 3/4"
> > in it, and a piece of 3/4" linear rail Laying around, Slide that
> > extrusion over the top of that rail. Now imagine it had ball
> slides
> > holding it centered........ Now picture some of that extrusion on
> each
> > end of the rail in the same orientation with the rail firmly
> attached in
> > the center of it. "Instant" Linear Rails !! Without Thomson
> Pricing !
> > Joe Blow, could make this work just with a lathe by his side !
> >
> >
> > Not a bad Idea, I think !!!
> >
> > To me, I would say every extrusion maker is "missing the
> boat" in
> > this regard. If you know of one of the common rail companies
> that offers
> > a possible solution, please let me know. I've been swimming
> in DXF
> > files and Catalogs without luck.
> >
> > Thanks,
> >
> > Chris L
>
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