Functional tolerancing of a gearbox

H. Wang, U. Roy, R. Sudarsan, R. D. Sriram, K. W. Lyons

Research output: Chapter in Book/Entry/PoemConference contribution

5 Scopus citations


This paper proposes a scheme for the tolerance-specification that uses the features' function information and mating condition attributes in the assembly to derive an appropriate tolerance specification as per the design intents. The proposed mirror method provides a way to locate the critical components. It helps the user identify functional features and group them into clusters. Temporary DRF (Datum Reference Frame) is first generated for each cluster of features on critical components by selecting specific features as datum features. Other features (that are not datum features) present in the same cluster are then toleranced with respect to those datum features. The temporary DRFs as well as the tolerancing scheme are then copied (a mirror image of the critical component) to the other mating components (which are mating with the particular critical component). The final DRFs on the critical components are then decided by analyzing the temporary DRFs and the given functional requirements of each component. Appropriate geometric tolerance types and material conditions for toleranced features are generated following the standards and the industrial practices.

Original languageEnglish (US)
Title of host publication31st North American Manufacturing Research Conference 2003 - Transactions of the North American Manufacturing Research Institution of SME
Number of pages8
StatePublished - 2003
Event31st North American Manufacturing Research Conference, NAMRC 31 - Hamilton, ON, Canada
Duration: May 20 2003May 23 2003

Publication series

NameTransactions of the North American Manufacturing Research Institution of SME
ISSN (Print)1047-3025


Other31st North American Manufacturing Research Conference, NAMRC 31
CityHamilton, ON

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering


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