Between 1 994 and 1 998, AGMA published three standards on calibration of gear
measuring instruments: ANSI/AGMA201 0–A94, MeasuringInstrumentCalibration–PartI,
Involute Measurement, ANSI/AGMA 211 3–A97, Measuring Instrument Calibration, Gear
Tooth Alignment Measurement, and ANSI/AGMA 211 4–A98, Measuring Instrument
Calibration, GearPitch and RunoutMeasurements. These standards covered elemental
measurements specified in the accuracy requirements of ANSI/AGMA 201 5–1 –A01 ,
Accuracy Classification System — Tangential Measurements for Cylindrical Gears. The
Calibration Committee decided that supplemental information, on measurement system
conditions for calibration, accuracy requirements and uncertainty determination, was
desirable to have in an Information Sheet, AGMA 931 –A02, CalibrationofGearMeasuring
InstrumentsandTheirApplicationtotheInspectionofProductGearsthat was published in
2002.
The material in these AGMA documents were combined and submitted to ISO for the
development of ISO 1 8653:2003, Gears — Evaluation ofinstruments forthe measurement
ofgears, and ISO/TR 1 0064–5:2005, Cylindricalgears –Codeofinspectionpractice –Part
5: Recommendations relative to evaluation ofgearmeasuring instruments.
The Calibration Committee decided that the similar standardization and information was
needed for the evaluation methods of double flank testers used for (radial) composite
measurement of gears. After a study of existing practices, standards, and literature the
information contained herein is a consolidation of the most common practices currently in
existence.

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