To tell the truth I haven't measured it. If you look closely at bright
mild steel the slight roughness tends to be pits in the surface rather
than bumps. Skate bearings give a fairly large contact area so they ride
over the pits. Quickly running over the surface with a sharpening stone
(I use a diamond hone) will take off any high spots and dings from
handling. Although BMS isn't that accurate dimensionally any given piece
will not vary much over it's length.
Les
uhmgawa wrote:
>What type of tolerances are you able to hold with this
>approach? At least with the mild steel of which I take
>delivery the surface really can't compare with ground
>drill rod.
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