Someone was asking what the flatness tolerance for the different grades of surface plates.
Here's the flatness tolerance formula:
• Laboratory Grade AA: (40 + diagonal [in inches] of surface plate squared / 25) x 0.000001 inches.
• Inspection Grade A: Laboratory Grade AA x 2
• Inspection Grade B: Laboratory Grade AA x 4
Source: http://www.mahr.com/index.php?NodeID...Language=EN-US
Here's the flatness tolerance formula:
• Laboratory Grade AA: (40 + diagonal [in inches] of surface plate squared / 25) x 0.000001 inches.
• Inspection Grade A: Laboratory Grade AA x 2
• Inspection Grade B: Laboratory Grade AA x 4
Source: http://www.mahr.com/index.php?NodeID...Language=EN-US
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