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Jim Wilkins  
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 More options Jul 10 2012, 7:47 am
Newsgroups: uk.rec.models.engineering
From: "Jim Wilkins" <muratla...@gmail.com>
Date: Tue, 10 Jul 2012 07:47:25 -0400
Local: Tues, Jul 10 2012 7:47 am
Subject: Re: Metal section
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"Peter Fairbrother" <zenadsl6...@zen.co.uk> wrote in message

news:4ffa8656$0$1151$5b6aafb4@news.zen.co.uk...

> I'm looking for something with a section like this:

>  _____
> |      \
> |       \
> |________\

> so I can build a slide like this:

> |      \  _____________________  /      |
> |       \ \         |         / /       |
> |________\ \        |        / /________|
>  ___________\_______|_______/__________
> |                                      |
> |______________________________________|

> for a machine tool. Probably want something like turcite on the
> face, so great accuracy isn't needed, but probably something like
> rigid cast iron would be good.

> any suggestions?

> thx,

> -- Peter Fairbrother

http://manufacturing.zibb.co.uk/suppliers/dovetail+slides/gb/25751576

However;
http://www.cnczone.com/forums/benchtop_machines/93956-linear_bearing_...

I've made a few dovetailed machine slides that I had to finish by hand
as I don't have equipment to grind the angles.
https://picasaweb.google.com/KB1DAL/Tools#5277053481061578594
https://picasaweb.google.com/KB1DAL/Tools#5277404613483169826
The pattern on the end of the round part is from surface grinding, but
I can't dress an angled wheel accurately, and anyway the grinder lacks
the travel to finish larger machine ways.

Round or square ways are easier to make from purchased ground stock.

If you assemble the vee ways from strips you may end up with less
rigidity than round linear rails.

jsw


 
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