The characteristics of 'geometric tolerances' that serve as a standard for indicating processing accuracy.
Introduction to the characteristics of geometric tolerances, which are effective standards for achieving high precision.
To manufacture and process according to customer requests, it is necessary to have design capabilities to shape those requests, along with high-precision technology that faithfully realizes that design. One effective criterion for judging whether processing is being carried out faithfully to the design is the characteristics defined by geometric tolerances. Geometric tolerances are divided into four categories: "shape," "orientation," "location," and "runout," with 19 types of characteristics established. 【Shape Tolerances】*Indicates the accuracy of geometric shapes. ■ Straightness - Whether the center of the processed item, generatrix, etc., is accurate as a straight line. ■ Flatness - Whether the surface of the processed item is flat and free of undulations. ■ Roundness - Whether the curvature of the circular part of the processed item is accurate as a circle. - Includes shaft parts and conical processed items. ■ Cylindricity - Indicates the degree of accuracy of cylindrical processed items. ■ Profile of a line - The minimal distortion in the line part that indicates the contour of the processed item. ■ Profile of a surface - The minimal distortion in the surface part that indicates the contour of the processed item. *For more details, please refer to the external link or feel free to contact us.
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【Tolerance of Orientation】* Indicates the accuracy of orientation relative to the datum (tolerable range of error). ■ Perpendicularity… How close it is to 90 degrees ■ Parallelism… The degree of accuracy of parallelism ■ Inclination… When an inclination at an angle other than 90 degrees is specified for the processed item, how accurate the inclination is ■ Contour of Line / Contour of Surface… Similar to shape tolerances 【Tolerance of Position】* Indicates the accuracy of position relative to the datum (tolerable range of error). ■ Position… The accuracy of position at various parts of the processed item ■ Concentricity… In cases such as cylindrical processed items, the accuracy of concentric circles ■ Coaxiality… In cases such as cylindrical processed items, how well the axis of the circles aligns ■ Symmetry… In cases where multiple cubes are combined in a processed item, how well the cross-sections that bisect each cube align ■ Contour of Line / Contour of Surface… Similar to shape tolerances and orientation tolerances 【Tolerance of Runout】 ■ Circular Runout… The degree of allowable deviation at a part of the surface when the component is rotated once ■ Total Runout… The degree of allowable deviation across the entire surface when the component is rotated once * For more details, please refer to the external link or feel free to contact us.
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Long Parts Co., Ltd. specializes in long-length processing and is committed to creating a system that allows us to deliver according to your requests with a motto of "strict adherence to deadlines" and "improvement of quality." Even in the case of urgent orders, we can ensure manufacturing and delivery within the deadline by temporarily allocating multiple machines to that production. Additionally, Long Parts is pursuing equipment investment and technological innovation to meet various shapes and requests. Please feel free to consult with us.