Re: Cold rolled steel, flats or square for use as rails.

Is it torchmate or practical that uses CRS, and grinds the inverted Vee ?

whom ever, they anticipate the metal flaring out over time to increase
the surface area. Anticipated wear.

If your designe allows, considder Superior Bearing Vee rails.
hardened and you can bolt that to your CRS to get a great rail.

What you will find out after much searching, is that the good stuff
costs a lot of money.

If you want to use CRS, go ahead. you could even get some additional
pieces for replacement parts if it comes to that. that would be
pretty cheap compared to actual linear rails.

Dave



--- In CAD_CAM_EDM_DRO@yahoogroups.com, Leslie Newell <les.newell@...>
wrote:

>
> Stainless is more expensive. Torchmate etc assume you will be using the
> machine in a dry environment. Plasma is a pretty inaccurate process

so a

> little bit of rust or dirt on the rails doesn't make a huge amount of
> difference. They are budget mnachines so costs need to be kept low.
> Proper linear rails are made from a fairly rust resistant alloy. You

can

> get stainless rails but you have to pay more and they don't normally
> last as long.
>
> Les
>
> apples0_17 wrote:
> > So that brings me to another question.
> >
> > Firstly yes the stainless steel seems to be the most logical so far.
> > How will stainless steel go for a bearing surface. I think from
> > memory SS is harder than normal mild steel? Yes??
> >
> > And then why do all the other manufacturers use either mild steel
> > unground ( cold rolled flats,torchmate) and then others use hardened
> > and ground steel.
> >
> > I can't say that I have seen any stailess steel rails made out of flat
> > or square stock. Maybe the Hiwin type and thompsons are all SS, I
> > don't know.
> >
> > Peter
> >
>