Mitutoyo
RA 116 Roundness
Provisional entry — research in progress
This page was generated automatically from cited public sources and hasn't completed the full research pass yet. Every specification shown carries its source; more detail is added as research completes.
The Mitutoyo RA 116 Roundness Tester is a metrology instrument for measuring roundness. The RA 116 is manufactured by Mitutoyo.[1][2]
What it is
How it works
General reference — not yet source-verifiedIn a typical roundness tester, the part to be measured is mounted on a rotating spindle. A contacting or non-contacting probe is positioned against the surface of the part, and as the part rotates, the probe follows the profile, detecting radial variations.
The displacement of the probe is converted into an electrical signal, which is processed to calculate roundness parameters such as total indicated runout or out-of-roundness. The measurement results are often displayed on a polar chart or as numeric values.
Where it fits in the process flow
General reference — not yet source-verifiedRoundness testers are used in the final inspection stage of manufacturing processes, after machining, grinding, or polishing. The parts are verified for roundness before being accepted for assembly or further processing.
Applications
General reference — not yet source-verifiedRoundness testers are used in industries that require precise roundness tolerances, such as automotive engine components, aerospace rotating parts, precision bearings, and fluid control valves. Roundness testers can also be used for research and development of new manufacturing processes.
What do the numbers mean?
No specifications recorded yet
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Where are the manuals?
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Not publicly documented
Field notes
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Not publicly documented
The following facts about the RA 116 Roundness are absent from this record as of this revision. First-hand knowledge or a citation closes a gap; every submission is reviewed before publication.
No specifications for the RA 116 Roundness are on record.
Answerable by: an OEM datasheet, a cleanroom equipment inventory, or an engineer who operated or installed it
No publicly documented production dates or lifecycle milestones (introduction, end of production, EOL) for the RA 116 Roundness are on record.
Answerable by: OEM historical records or a trade-press announcement
No publicly documented variants, configuration options, or revision breakpoints of the RA 116 Roundness are on record.
Answerable by: an OEM product catalog or an engineer who ordered or specified the tool
The control-system platform and OS era of the RA 116 Roundness are not on record.
Answerable by: an engineer who operated it or OEM installation records
No publicly documented failure modes or field errata for the RA 116 Roundness are on record.
Answerable by: a field service engineer, process engineer, or maintenance technician
No research found yet — worked with this tool? Share what you know.
Sources & citations
Sources (2)Every fact above is drawn from these public sources
- [1]Equipment inventory listing
- [2]Equipment inventory listing
Last updated Oct 4, 2026.
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