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4.6 Dimensioning the Object’s Features

Table 4.1 shows some of the samples of dimensioning the object’s features.

Dimension Information to be dimensioned Dimensioning components
• Length of an angle Extension and dimension lines and
• Distance between features dimension number

Length

Dimension Information to be dimensioned Dimensioning components
Extension and circular dimension lines and
• Angle between edges
dimension number

➢ A circular dimension line must have its center at the vertex of the angle

Angle

Dimension Information to be dimensioned Dimensioning components
• Radius Leader line and local note
Extension and dimension lines and
• Location of its center
dimension number
➢ The leader line must be aligned with a radial line and has an inclined angle
o
o
between 30 – 60 to the horizontal

Arc

➢ The letter ‘R’ is written in front of a number to emphasize that the number
represents the radius of an arc.
➢ The note and the arrowhead should be placed on a concave side of an arc,
whenever there is a sufficient space.