Application of TTRS method in industrial practice: Tolerance specification for industrial cooling water pumps

O.W. Salomons, R.E. Begelinger, E. Post, F.J.A.M. van Houten

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review


This paper discusses the application of the TTRS method for tolerance specification in a company which designs and manufactures industrial cooling water pumps. The TTRS method has been applied by the engineering department of this company for cooling water pumps that are part of certain product families. No explicit use was made of commercial computer aided tolerancing tools since the company used Pro/Engineer as their CAD system for which the TTRS method is not yet commercially available. Only a spreadsheet program (for tolerance analysis) and a CAD system for generating drawings with tolerance specifications were used. Applying the TTRS approach gives a better insight in which faces are truly functional and which tolerances should (and should not) be specified. The trial showed that after a training in the basic concepts of the TTRS method, engineers were enthusiastic about the new method. In fact, the TTRS method has been adopted by the company as their internal standard tolerance specification methodology. Nevertheless, there are still some issues regarding the TTRS theory that came up during the industrial trial and that need to be solved. One of the most important problems is that tolerance value specification is not yet supported, especially in combination with complex shaped surfaces. The paper discusses these issues.
Original languageEnglish
Title of host publicationGlobal Consistency of Tolerances
Subtitle of host publicationProceedings of the 6th CIRP International Seminar on Computer-Aided Tolerancing, University of Twente, Enschede, The Netherlands, 22–24 March, 1999
EditorsFred van Houten, Hubert Kals
Place of PublicationEnschede
ISBN (Electronic)978-94-017-1705-2
ISBN (Print)978-90-481-5198-1
Publication statusPublished - 24 Jan 1999
Event6th CIRP International Seminar on Computer-Aided Tolerancing 1999 - University of Twente, Enschede, Netherlands
Duration: 22 Mar 199924 Mar 1999
Conference number: 6


Conference6th CIRP International Seminar on Computer-Aided Tolerancing 1999


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