Please enable JavaScript.
Coggle requires JavaScript to display documents.
Dimensions, Tolerances, Assemblies - Coggle Diagram
Dimensions, Tolerances, Assemblies
dimensions
type of dimensions
- Parallel dimensioning
consists of several dimensions from a common reference surface
- Superimposed running dimensioning
simplifies parallel dimensions to reduce space used on a drawing
- Chain dimensioning
used if the function of object would not be affected by the accumulation of tolerances
- Combined dimensioning
uses both chain and parallel dimensioning
- dimensioning small features
place arrow heads outside extension lines
- dimensioning of multiple features
to dimension multiple same dimensions, use N x Dimension
- dimensioning of radius
radial dimensions start is capital 'R'
- dimensioning of circle, arc, hole
circle - dimensioned by diameter
arc - dimensioned by radius
hole - located by centerlines
- dimensioning angles
marked with curved dimension line and degree symbol
rules of dimensioning
- dimensions should not be duplicated
- avoid dimensioning hidden lines and features
3.dimension lines, extension lines and object outlines should not cross or overlap
tolerances
type of tolerances
- bilateral tolerance
varies in 2 directions and need not vary by the same amount
- unilateral tolerance
vary in only one direction
- limit tolerance
upper and lower limits of the dimensions are specified
-
assemblies
-
interference fit
-
difficult to move the 2 interfacing parts, a lot of force is needed to
move the two parts
-