Tolerance analysis of machining fixture locators

S. A. Choudhuri, E. C. De Meter

Research output: Contribution to journalArticlepeer-review

111 Scopus citations


The geometric variability of locators within a machining fixture is a known source of datum establishment error and machined feature geometric error. A locator tolerance is used to specify the range of permissible locator variation. Currently there are no models that relate a locator tolerance scheme to the worst case geometric errors that may result due to datum establishment error. This paper presents a methodology for modeling and analyzing the impact of a locator tolerance scheme on the potential datum related, geometric errors of linear, machined features. This paper also provides a simulation study in which locator tolerance analysis is applied to reveal some important insights into the relationship between machined feature geometric error, locator design, and locator tolerance scheme.

Original languageEnglish (US)
Pages (from-to)273-281
Number of pages9
JournalJournal of Manufacturing Science and Engineering, Transactions of the ASME
Issue number2
StatePublished - May 1999

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Mechanical Engineering
  • Computer Science Applications
  • Industrial and Manufacturing Engineering


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