[CAD_CAM_EDM_DRO] Re: aluminum Vee rails ?

Using single deep groove bearings, as shown with makerslide, will be no
good. They are not designed to take a twisting load, as when you would have
a spindle hanging off this rail.
V groove rail bearings are usually dual, ie two bearings next to each
other. The V then sits between the bearings, making a triangular load
diagram.

Here is an example;
http://www.google.co.za/imgres?imgurl=http://www.hb-bearings.com/1manufacture/pictures/pic%252022.jpg&imgrefurl=http://www.hb-bearings.com/1manufacture/products2.htm&h=200&w=300&sz=35&tbnid=Q3DVSG6fBHP91M:&tbnh=90&tbnw=135&prev=/search%3Fq%3Dv%2Bgroove%2Bbearing%26tbm%3Disch%26tbo%3Du&zoom=1&q=v+groove+bearing&docid=t8_FuOR5cMLnzM&sa=X&ei=k4m4T8WHDcTLhAfMgon-CA&ved=0CLABEPUBMAg&dur=2699

Regards
Roland

On 19 May 2012 23:16, Tony Smith <ajsmith1968@...> wrote:

> **
>
>
> > Yes, this is the idea.
> > Any experience of how much strength this has ?
> >
> > Also, it looks like a total patent violation of the Bishop Wisecarver
> stuff ?
> >
> > IIRC, there was a guy selling exact duplicates of the BW stuff a few
> years
> ago.
> > does not seem to be around anymore.
> >
> > Dave
>
> Since it's just the regular beam (4"x2") with the rails added, I'm guessing
> the strength would be the same. The www.makerslide.com site lists the
> numbers to calculate the strength. The www.buildlog.net site has this:
> http://www.buildlog.net/forum/viewtopic.php?f=30&t=1258&start=10
>
> Originally they were using the Bishop Wisecarver stuff, but decided gluing
> those to the beam or grinding flat plate was too hard, so making a custom
> part was easier (more fun anyway). Each to their own I guess.
>
> There's been no mention of patents, presumably it's "different enough" to
> avoid conflict or maybe BW haven't noticed yet.
>
> Tony
>
>
>


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