Tolerance Control and Location Surfaces

  • A. Y. C. Nee
  • K. Whybrew
  • A. Senthil kumar
Part of the Advanced Manufacturing Series book series (ADVMANUF)


A sequence of machining operations involves a series of set-ups for holding and locating the workpiece while it is being machined so that the required design specifications can be economically achieved. To this end the sequence of machining operations and the selection of location surfaces must be based on the practicality of locating and holding the workpiece and on the dimensional relationships between machined features of the part. These are aspects of fixture design previously discussed as workpiece control. Geometric and mechanical control are concerned with practicalities of fixture design and dimensional control deals with the dimensional relationships between machined features. Good dimensional control is guaranteed if the workpiece is located on one of the pair of surface features related by a dimension while the second surface is machined. (This is axiom 7). While this ideal should be strived for, consideration of geometric and mechanical control may make it impossible to achieve. If surfaces not referred to by the dimension are used for location then manufacturing tolerance stacks are inevitable.


Machine Surface Location Surface Final Dimension Design Dimension Nominal Dimension 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag London Limited 1995

Authors and Affiliations

  • A. Y. C. Nee
    • 1
  • K. Whybrew
    • 2
  • A. Senthil kumar
    • 1
  1. 1.Department of Mechanical and Production EngineeringNational University of SingaporeSingapore
  2. 2.Department of Mechanical EngineeringUniversity of CanterburyChristchurchNew Zealand

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