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Roundness

CIRP Encyclopedia of Production Engineering

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Definition

A form tolerance that prescribes the largest possible deviation of a circle from its geometrical ideal form (Pfeifer and Schmitt 2010). The roundness tolerance determines that in each section perpendicular to the axis of a toleranced cone-formed element, the actual profile, or the actual contour line, must lie between two concentric circles within the same plane, which are at the distance of the tolerance value. For sphere-formed elements, this tolerance is valid for each intersection through the center.

Theory and Application

The sample workpiece has a drill hole for the bearing with a roundness tolerance of 0.01 mm (Fig. 1). Roundness tolerances can also be used for arcs of circles with less than 360 coverage (Pfeifer and Schmitt 2010).

Fig. 1
figure 1

Roundness

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References

  • DIN EN ISO 1101 (2008) Geometrical product specifications (GPS): geometrical tolerancing – tolerances of form, orientation, location and run-out. Beuth, Berlin

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  • Pfeifer T, Schmitt R (2010) Fertigungsmesstechnik [Metrology in production], 3rd edn. Oldenbourg, München (in German)

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Authors and Affiliations

  1. Laboratory for Machine Tools and Production Engineering WZL, RWTH Aachen University, Steinbachstraße 19, D-52074, Aachen, Germany

    Robert Schmitt

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  1. Robert Schmitt
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Correspondence to Robert Schmitt .

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Editors and Affiliations

  1. CIRP Office Intern. Institution for, Paris, France

    The International Academy for Produ

  2. Université du Québec à Trois-Rivières, Mechanical Engineering Department, Trois-Rivieres, Québec, Canada

    Luc Laperrière

  3. Technische Universität München, Garching, Germany

    Gunther Reinhart

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© 2015 CIRP

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Schmitt, R. (2015). Roundness. In: The International Academy for Produ, ., Laperrière, L., Reinhart, G. (eds) CIRP Encyclopedia of Production Engineering. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-35950-7_6594-4

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  • DOI: https://doi.org/10.1007/978-3-642-35950-7_6594-4

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Online ISBN: 978-3-642-35950-7

  • eBook Packages: Springer Reference EngineeringReference Module Computer Science and Engineering

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Chapter history

  1. Latest

    Roundness
    Published:
    14 March 2018

    DOI: https://doi.org/10.1007/978-3-642-35950-7_6594-5

  2. Original

    Roundness
    Published:
    02 March 2015

    DOI: https://doi.org/10.1007/978-3-642-35950-7_6594-4

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