Mechanical Engineering Drawing Workshop

Dimensioning

• Dimensioning symbols

Description

Symbol Usage

diameter

Put before dimensionφvalue of diameter.

radius

Put before dimensionRvalue of radius.

spherical diameter

Put before dimensionSφvalue of diameter ofsphere.

spherical radius

Put before dimensionSRvalue of radius of sphere.

square

Put before dimension□value of square.

thickness of board

Put before dimensiontvalue of thickness ofboard.

45 degree chamfers

Put before dimensionCvalue of 45°chamfers.