Re: Alternative shafts for linear bearings

There is another possibility if you don't mind playing around and
that would be to get the non-super precision stuff and then changing
the balls to fit.

just make sure it is hardened.

Dave



--- In CAD_CAM_EDM_DRO@yahoogroups.com, karthi keyan <karthihbl@y...>
wrote:

> explain me
>
> karthik
>
> Ron Yost <musik42@c...> wrote:
>
> >McMaster does have Grade 01 Tool Steel "Precision Ground" Drill

Rod -

> >Metric Sizes (page 3370)... $8.36 for 3ft of 13mm and $11.23 for 3

ft

> >of 16mm. The problem is, even assumming it's straight enough for
> >your use (it's not specified), the diameter tolerance is +/-

0.025mm

> >and linear bearings do not fit plus size. You could pray that the
> >ones they send you fall on the minus side, but Murphy's Law will
> >probably prevail and your bearings won't fit.
>
> Also, so-called drill rod (silver steel, in England) is not always
> 'straight' (especially hardware store varieties). Precision

shafting

> is straight, and the correct diameter, hardness, etc. Yes, we still
> do get what we pay for .. usually. :)
>
> Ron Yost
>
>
>
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