DIMENSIONING
DIMENSIONING
• is the process of defining the size, form and location of geometric features and components on an engineering drawing.
LINES USED IN DIMENSIONING:
EXTENSION LINE - is a solid line that extends from a point on the drawing to which the dimension refers.
DIMENSION LINE – a line terminated by arrowheads, which indicates the direction and extent of a dimension.
EXTENSION LINE - is a solid line that extends from a point on the drawing to which the dimension refers.
DIMENSION LINE – a line terminated by arrowheads, which indicates the direction and extent of a dimension.
FORMS OF DIMENSIONING
A. DIMENSION – is used to give distance between two points, lines, of plane or some combination of points.
1. Numerical Value – gives the actual distance or measurements.
2. Dimension Line – indicates the direction in which the value applies.
3. Arrowheads – indicates the point to which the value applies.
4. Extension Line – limits the position of the arrowheads and shows the exact length measured. B. NOTE – provide a means of giving explanatory information along with a size.
SYSTEM OF DIMENSIONING
ALIGNED SYSTEM – the figures are oriented to be readable from a position perpendicular to the dimension line.
HORIZONTAL or UNDIRECTIONAL SYSTEM
- all figures are oriented to be read from the bottom of the drawing.
DIMENSIONING TECHNIQUES
• All dimension lines and arrowheads must lie in the lanes of the object to which they apply.
• Align dimensions and notes shown with leaders to the bottom of the drawing.
• Notes without leaders should also align with the bottom of the drawing.
• Use single-stroke gothic letters for dimensions and lettering on drawings.
DIMENSIONING PRINCIPLES
1. Each feature of an object is dimensioned once and only once.
2. Dimensions should be selected to suit the function of the object.
3. Dimensions should be placed in the most descriptive view of the feature being dimensioned.
4. Dimensions should be specify on the
• is the process of defining the size, form and location of geometric features and components on an engineering drawing.
LINES USED IN DIMENSIONING:
EXTENSION LINE - is a solid line that extends from a point on the drawing to which the dimension refers.
DIMENSION LINE – a line terminated by arrowheads, which indicates the direction and extent of a dimension.
EXTENSION LINE - is a solid line that extends from a point on the drawing to which the dimension refers.
DIMENSION LINE – a line terminated by arrowheads, which indicates the direction and extent of a dimension.
FORMS OF DIMENSIONING
A. DIMENSION – is used to give distance between two points, lines, of plane or some combination of points.
1. Numerical Value – gives the actual distance or measurements.
2. Dimension Line – indicates the direction in which the value applies.
3. Arrowheads – indicates the point to which the value applies.
4. Extension Line – limits the position of the arrowheads and shows the exact length measured. B. NOTE – provide a means of giving explanatory information along with a size.
SYSTEM OF DIMENSIONING
ALIGNED SYSTEM – the figures are oriented to be readable from a position perpendicular to the dimension line.
HORIZONTAL or UNDIRECTIONAL SYSTEM
- all figures are oriented to be read from the bottom of the drawing.
DIMENSIONING TECHNIQUES
• All dimension lines and arrowheads must lie in the lanes of the object to which they apply.
• Align dimensions and notes shown with leaders to the bottom of the drawing.
• Notes without leaders should also align with the bottom of the drawing.
• Use single-stroke gothic letters for dimensions and lettering on drawings.
DIMENSIONING PRINCIPLES
1. Each feature of an object is dimensioned once and only once.
2. Dimensions should be selected to suit the function of the object.
3. Dimensions should be placed in the most descriptive view of the feature being dimensioned.
4. Dimensions should be specify on the