Dimension
The dimension is the difference between the dimension measured on a component , the actual dimension , and its nominal dimension (nominal dimension or planned dimension).
Example: The planned length of the component is 224 mm. After completion, a length of 223 mm is determined on the component. The dimension is therefore −1 mm.
The term dimension is used in
- Actual dimension (or only dimension ): existing, i.e. measured deviation from the nominal dimension,
- Upper dimension : when specifying a dimension tolerance, specified permissible upper (highest) deviation from the nominal dimension,
- Lower dimension : when specifying a dimension tolerance, specified permissible lower (lowest) deviation from the nominal dimension.
The difference between the upper and lower dimensions is called the tolerance . A gauge can be used to determine whether the workpiece was manufactured within the permitted dimensions without determining the actual size.
Dimensions for external dimensions (e.g. shafts) are marked in accordance with DIN ISO 286 with lower case letters and for internal dimensions (e.g. bores) with capital letters.
Individual evidence
- ↑ DIN ISO 286 Geometrical product specification - ISO tolerance system for linear dimensions - Part 1: Basics for tolerances, dimensions and fits
- ^ W. Krause: construction elements of precision mechanics . Munich: Hanser, 2004, p. 63.
- ↑ a b J. Lienig, H. Brümmer: Electronic device technology . Springer Vieweg, 2014, ISBN 978-3-642-40961-5 , p. 224.
literature
- W. Krause: Basics of the construction . Munich: Hanser, 2012. ISBN 978-3446426504 .
- W. Krause: Construction elements of precision mechanics . Munich: Hanser, 2004. ISBN 978-3446223363 .