Overview
ISO/TR 10064-6:2009 - "Code of inspection practice - Part 6: Bevel gear measurement methods" is an informative Technical Report from ISO/TC 60 that describes accepted measurement methods and practices for unassembled bevel and hypoid gears and gear pairs. The document focuses on inspection procedures that produce accurate, repeatable results compatible with the tolerance grades defined in ISO 17485:2006. It is intended for component-level inspection (not for enclosed gear units such as gear motors, reducers or complete assemblies).
Key topics and requirements
- Scope & intent: Guidance for measuring unassembled bevel/hypoid gears to verify conformity with ISO 17485 tolerance grades.
- Measurement subjects: Pitch deviations, runout, flank form, contact pattern checking, single‑flank and double‑flank composite tests, tooth thickness and datum surface tolerances.
- Measurement methods: Describes required and optional techniques (see Clause 6 of ISO 17485 for method selection) and recommends measurement at the tolerance diameter unless agreed otherwise.
- Manufacturing and purchasing considerations: Advice on documentation, agreed measurement protocols between manufacturer and purchaser, and when special measurements are needed.
- Process control: Emphasis on manufacturing planning, tool and machine maintenance, heat treatment control and statistical inspection methods to produce uniform gear quality with minimal final inspection.
- Acceptance and reporting: Notes on acceptance criteria, evaluation of measurement data, and need to specify loaded vs. unloaded tooth sides when applicable.
- Limitations: Does not apply to assembled/enclosed gear units and cautions users about extrapolating unassembled gear tolerances to assembled performance without application experience.
Practical applications - who uses it
- Gear manufacturers - to set shop inspection procedures and process control for bevel/hypoid gears.
- Quality & metrology engineers - to develop repeatable measurement protocols for runout, pitch, flank form and tooth thickness.
- Purchasers and spec writers - to define inspection requirements and acceptance criteria compatible with ISO 17485 accuracy grades.
- Design and maintenance engineers - to understand achievable component tolerances and requirements for matched gear sets and backlash considerations.
Related standards
- ISO 17485:2006 - Bevel gears - ISO system of accuracy (tolerance values and method tables).
- ISO 23509 - Bevel and hypoid gear geometry.
- ISO 1122-1 - Vocabulary of gear terms (geometry definitions).
Keywords: ISO/TR 10064-6:2009, bevel gear measurement methods, bevel and hypoid gears, gear inspection, ISO 17485, gear tolerance, runout, flank form, pitch deviation, tooth thickness.
