ClipArt ETC
Castings can be measured by laying a straight edge on top to measure the dimensions of the casting.

Measuring Castings using Straight Edge

Castings can be measured by laying a straight edge on top to measure the dimensions of the casting.

To draw a straight line, the pen must be perpendicular with the straight edge ruler, as shown in A. A one sided ragged line will result if the pen is positioned at C. If the pen is positioned at B, the ink will run under the edge and form a blot.

Positioning Pen with the Straight Edge

To draw a straight line, the pen must be perpendicular with the straight edge ruler, as shown in A.…

Scraped straight edge.

Scraped Straight Edge

Scraped straight edge.

An English T-square for drawing straight lines. The narrowing of the bottom blade makes the T-square look as if it is not perpendicular.

English T-square

An English T-square for drawing straight lines. The narrowing of the bottom blade makes the T-square…

A long fixed head T-square for drawing straight lines. The head shape of the T-square allows for drawing a long square.

Long Fixed Head T-square

A long fixed head T-square for drawing straight lines. The head shape of the T-square allows for drawing…

A regular fixed head T-square for drawing straight lines. The blade must be perfectly straight in order to draw accurate lines.

Regular Fixed Head T-square

A regular fixed head T-square for drawing straight lines. The blade must be perfectly straight in order…