Latest Insights on Metrology

Practical knowledge, real-world case studies, and technical guides from the field of dimensional metrology and quality systems.

Why a CMM Is Often the Wrong Final Tool for Tight Hole Size Verification

A recent discussion started with a familiar complaint: someone said they could not get a Renishaw TP20 to report a certified ring gage correctly. Predictably, the replies split into the usual camps. Some assumed the machine had to be faulty. Others assumed operator error. Still others flatly rejected the premise, as though a CMM struggling with a ring gage were too absurd to consider.

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