Re: [CAD_CAM_EDM_DRO] Re: Alternative shafts for linear bearings

>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