The Mechanical Drawing Tools ClipArt gallery offers 100 illustrations of tools commonly used in mechanical drawing such as dividers, drawing boards, pencils, scales, triangles and t-squares.

A pencil case or pencil box is a container used to carry pencils. A pencil case can also contain a variety of other stationery such as a pencil sharpener, pens, erasers, a stapler, and a calculator.

Sanitary Pencil Box

A pencil case or pencil box is a container used to carry pencils. A pencil case can also contain a variety…

A hook-spring with pencil point to draw circles.

Pencil Point Hook-Spring Bow

A hook-spring with pencil point to draw circles.

A standard sized pencil point spring bow to draw circles.

Pencil Point Spring Bow

A standard sized pencil point spring bow to draw circles.

Sharpened drawing pencil for mechanical drawings.

Drawing Pencil

Sharpened drawing pencil for mechanical drawings.

The wood is cut away so that about 1/4 or 1/2 inch of lead projects. The lead can then be sharpened.

Dull Edge Pencil

The wood is cut away so that about 1/4 or 1/2 inch of lead projects. The lead can then be sharpened.

The lead can be sharpened to a chisel edge by rubbing it against a bit of sand paper or a fine file, and the corners slightly rounded.

Sharpened Pencil

The lead can be sharpened to a chisel edge by rubbing it against a bit of sand paper or a fine file,…

Pencils are the basic tool for mechanical drawing. Pencilling is the first basic skill in mechanical drawing.

Mechanical Pencils

Pencils are the basic tool for mechanical drawing. Pencilling is the first basic skill in mechanical…

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.…

The protractor, an instrument for laying off and measuring angles, is made of steel, brass, horn or paper.

Protractor

The protractor, an instrument for laying off and measuring angles, is made of steel, brass, horn or…

Sometimes built into a compass, this instrument allows you to determine and measure angles in degrees and is most useful when projecting magnetic lines across your map.

Bevel Protractor

Sometimes built into a compass, this instrument allows you to determine and measure angles in degrees…

A semicircular instrument for measuring and constructing angles.

Drafting Protractor

A semicircular instrument for measuring and constructing angles.

A 6 inches diameter protractor to measure angles to half degrees, made of brass or German silver. They are useful in map and topographical work.

Semicircular Protractor

A 6 inches diameter protractor to measure angles to half degrees, made of brass or German silver. They…

An Architect's Scale ruler for drawing machinery and structures.

Architect's Scale Ruler

An Architect's Scale ruler for drawing machinery and structures.

A straightedged strip, as of wood or metal, for drawing straight lines and measuring lengths.

Drawing Ruler

A straightedged strip, as of wood or metal, for drawing straight lines and measuring lengths.

An Engineer's Scale ruler for plotting and map drawing.

Engineer's Scale Ruler

An Engineer's Scale ruler for plotting and map drawing.

The flat scales are more convenient than the scales on the stick due to the delay in finding the correct scale.

Single Scale Ruler

The flat scales are more convenient than the scales on the stick due to the delay in finding the correct…

Different ruler shapes for different scales. The triangle shape, lettered A, is commonly used in Engineer's Scale and Architect's Scale.

Scale Ruler Shapes

Different ruler shapes for different scales. The triangle shape, lettered A, is commonly used in Engineer's…

Top and side views of mechanical drawing scales.

Scales

Top and side views of mechanical drawing scales.

The triangle scale has six surfaces for different graduations, and the scales are arranged so that the drawings may be made in any proportion to the actual size.

Triangle Scales

The triangle scale has six surfaces for different graduations, and the scales are arranged so that the…

"This distance should be thought of not as three inches but as a foot divided into inches and eighths of inches. It is noticed that this foot is divided with the zero on the inside, the inches running to the left and the feet to the right, so that dimensions given in feet and inches may be read directly, as 1 ft. 0 1/2"." —French, 1911

Scaling Drawing with Ruler

"This distance should be thought of not as three inches but as a foot divided into inches and eighths…

A standard sized spring bow with bow points or spacers to draw circles.

Spring Bow with Bow Points

A standard sized spring bow with bow points or spacers to draw circles.

A T-shaped or L-shaped instrument for drawing or testing right angles.

Folding Square

A T-shaped or L-shaped instrument for drawing or testing right angles.

This folding square is also known as a t-square which is a technical instrument, primarily a guide for drawing horizontal lines on a drafting table.

Folding Square

This folding square is also known as a t-square which is a technical instrument, primarily a guide for…

An illustration of enlarging an image by using squares. This proportion method is done by using squares to resize the image.

Enlargement of Image by Squares

An illustration of enlarging an image by using squares. This proportion method is done by using squares…

"Where the square has a fast and a loose head, the blade should be mortised into the fixed one and the nut and thumb screw arranged as shown; the movable swivel head being used the least." —Grimshaw, 1902

Adjustable Rectangular Head T Square

"Where the square has a fast and a loose head, the blade should be mortised into the fixed one and the…

A front and side view of a t square with rectangular head. The t square is used draw straight lines using the blade in mechanical drawing.

Fixed Rectangular Head T Square

A front and side view of a t square with rectangular head. The t square is used draw straight lines…

"To enable the drawing of long parallel, the head must have been a long contact surface with the edge of the board. It must also be wide enough to hold the blade stiffly." —Grimshaw, 1902

Fixed Triangular Head T Square

"To enable the drawing of long parallel, the head must have been a long contact surface with the edge…

"Where the head is movable, the pivot should be quit large, and the hole in which it plays be bushed with metal; the washers must be large, and the clamp screws of hard metal, with deep threads and unreliable." —Grimshaw, 1902

Taper Head Adjustable T Square Side and Front View

"Where the head is movable, the pivot should be quit large, and the hole in which it plays be bushed…

An adjustable T-square to create straight lines at different angles with a ruler attached to the head.

Adjustable Head T-square with Ruler

An adjustable T-square to create straight lines at different angles with a ruler attached to the head.

A T-shaped ruler, used primarily in mechanical drawing, having a short crosspiece that slides along the edge of the drawing board as a guide to the perpendicular longer section in making parallel lines, right angles, etc., and as a support for triangles.

Adjustable Drafting T-Square

A T-shaped ruler, used primarily in mechanical drawing, having a short crosspiece that slides along…

An adjustable T-square to create straight lines at different angles.

Adjustable Head T-square

An adjustable T-square to create straight lines at different angles.

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…

T—squares can be temporarily adjusted by putting the thumb tack in the head as illustrated. This is used when the previous work does not align with the T-square.

Temporary Adjustment T-square

T—squares can be temporarily adjusted by putting the thumb tack in the head as illustrated. This…

A test to ensure the triangle is accurate by drawing a perpendicular line from a T-square.

Triangle Accuracy Test using T-square

A test to ensure the triangle is accurate by drawing a perpendicular line from a T-square.

The Rondinella triangle is a modified triangle ruler, where the hypotenuse is outwardly bent.

Rondinella Triangle

The Rondinella triangle is a modified triangle ruler, where the hypotenuse is outwardly bent.

The Zange triangle is a modified triangle ruler, where one of the legs is longer making the hypotenuse is elongated.

Zange Triangle

The Zange triangle is a modified triangle ruler, where one of the legs is longer making the hypotenuse…

The Kelsey triangle is a modified triangle ruler, where the hypotenuse is inwardly bent.

Kelsey Triangles

The Kelsey triangle is a modified triangle ruler, where the hypotenuse is inwardly bent.

Sharpen the the pencil by removing the wood with a penknife and rubbing the lead on sand paper. The wedge or flat point will remain sharper than the conical point.

Wedge Point of Pencil

Sharpen the the pencil by removing the wood with a penknife and rubbing the lead on sand paper. The…