Re: [CAD_CAM_EDM_DRO] Re: Linear slides (and a rant on extrusions)

As I have indicated, I would never go the route of getting my own stuff made
for the reasons Dave gave. You'd never have enough dies to make what people
wanted. Well, you could, but it would be expensive. So much for "cheap"
options".

This "add a linear bearing" concept would have to come from one of the
existing extrusion companies. They could ramp this into production without
breaking a sweat.

The closest company I found that makes something that might work is Parletti.
The have some real nice round holes and pretty thick walled stock. The
problem is, the holes are just a frog hair to small. Sure, one could fixture
each piece and bore it to size, but this defeats the whole concept. It has to
be something " the newbie" can put together and get fair results. You could
never drop this stuff onto your drillpress table and make it work. Sometimes,
a drill press seams to be all a person has when he gets the first itch to
make things "move" with his old PC.

Chris L

dave_ace_me wrote:

> McMaster Carr.
>
> they sell the components right out of the catalogue.
>
> and if you want to go the distributor route,
> don't be impolite and ask how much. They need
> their 40% mark-up so they can drive the company
> car to have lunch on their expense account.
>
> When you see that they sell a hunk of steel for
> $$$$$$$ and an extrusion for $$$$$ and put them
> together for you and charge $$$$$$$ you know why
> we are looking for those extrusions.
>
> while on my rant, I paid $1,200 for the die for my
> extrusions, then like $1.20 per pound for the aluminum.
>
> The problem with the recent discussion on extrusions is
> that I want 1/2 inch someone else 3/4 1" or 1.5 inch
> for the bearings, then ditto for the base rail.
> that's 8 dies at the $600 each figure (1,200 from my guy)
>
> on a seperate note here, if you make a die and do your
> job, and don't use it again for 2-3 years depending on
> the house, they take possesion of if and will use it
> as a non-propriety die. what this means is that
> if we look around we could probably find a die
> that is 'free' just buy the extrusions.
>
> if we could get a lot price on drilled ground rod
> of say, 1,000 feet and all agree on using 10 feet
> then the one bearing, one rail set (base and bearing)
> would cost close to $4,000 for a single run.
> if 100 of us got 10 feet, it would cost us $40.00
> for un-finished lengths.
> by the time you're done machining, in house,
> you would be close to $100, plus the bar and liner.
>
> if we could get one guy to machine the rails
> and bearings, we could go into business and get our
> stuff cheap, pay shop rate for the guy doing the
> machining and still pay a profit or dividends.
>
> Simple business model, down our (at least some of our's)
> alley.
>
> maybe I'm a day late and a dollar short on this one.
> but if someone does this, capitalism says that you
> don't leae any money on the table. so if you currently
> buy a set for $200 and someone makes it for $100
> they will most likly sell it for $180. we don't get any
> real benefit and the market isn't rocked.
>
> Dave
>
> --- In CAD_CAM_EDM_DRO@y..., "John H." <johnhe-uk@s...> wrote:
> > Oky Doky, I'm now giving up my search on the Holey Grail of sites
> that lists
> > prices and not just model numbers.
> > I'm looking for a very, very, rough idea of how much a 1000 -
> 1200mm linear
> > slide would be to carry anything over 5 - 15kilos. Infact, has
> anyone seen a
> > site selling linear rails, slides, bearings etc with prices on it?
> Or is
> > this a "If you've got to ask you can't afford it" thing. [John gets
> his
> > oxygen mask ready for the replies]
> >
> > John H.
>
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