Was wondering about the thickness accuracy of a surface plate. We all know about grade aa, a, and b accuracy pertaining to surface flatness, but does these standards also apply for thickness, lenght, width. Any input would be helpful. Thanks
Was wondering about the thickness accuracy of a surface plate. We all know about grade aa, a, and b accuracy pertaining to surface flatness, but does these standards also apply for thickness, lenght, width. Any input would be helpful. Thanks
Wow, thats interesting. I figured for some stupid reason the tolerances were for all sides and demensions. Now thinking about it, that seems alittle to costly to produce at such a cheap price. Thanks for the info.
Please precise what you are planning.
See my new 5 axis gantry mill on progress. There I use (pressed polymer) granite panels.
Mostly granite panels made for construction, kitchen, art ... I have been in factory and seen several stone workshops. Even when cnc machines they have bit another grip about accuracy - production has good looks but afar off high precisions. You will turn white when see "measuring devices" they use when showing off about their "perfect accuracy"
About surface - mostly it is as perfect as it looks. Bottom near never perfect and not parallel to surface
For high accuracy these panels and plates must to be especially made in special places by special men for special money and/or you have to be smart enough when installing/assembling.
Regards,
Herbert
personally, I'd serious doubt the sides are square/parallel to any degree of accuracy.....else why can you by a small Starrett plate at a fraction of the price of a even smaller Starrett granite square if the plate contains a squareness reference.
ok, grabbed a master square and the checked a Starrett plate - front to top is out like 1/16's of an inch (over 6") not much doubt about that, lol. so, no when you buy a standard surface plate, you're buying one very flat surface and that's it
[QUOTE=Mcgyver;649913]ok, grabbed a master square and the checked a Starrett plate - front to top is out like 1/16's of an inch (over 6") not much doubt about that, lol.
Ha,Ha,Ha. That's crazy. Here I was thinking maybe .001 or so.