What does straightness mean?
In this regard, is straightness a word?
adjective, straight·er, straight·est. without a bend, angle, or curve; not curved; direct: a straight path.
One may also ask, how is tube straightness measured? The tube is held in place pressed against a flat solid surface. If the tube is not straight there will be a gap between the surface and the tube. A ruler is used to measure the size of the gap (figure 1). The curvature of the tube can be calculated from the gap size and the length of the tube.
Considering this, what is difference between flatness and straightness?
The property of a plane is flatness, i.e. the state of being flat without having pits and mounds or being even -i.e. not being uneven. Straightness is about a practically one-dimensional straight line which is supposed to have only length, i.e. only one dimension. It is the shortest distance between two points.
What is flatness in GD&T?
GD&T Flatness is very straight forward. It is a common symbol that references how flat a surface is regardless of any other datums or features. The flatness tolerance references two parallel planes (parallel to the surface that it is called out on) that define a zone where the entire reference surface must lie.