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.

Scales are made with different divisions for different purposes. For machine, structural and architectural drawing the architects' scale of proportional feet and inches is used.

The Scale of the Architects

Scales are made with different divisions for different purposes. For machine, structural and architectural…

The diagram shows the relationship between true, magnetic, and grid azimuths and bearings.

Azimuths

The diagram shows the relationship between true, magnetic, and grid azimuths and bearings.

The bow spacer is used when working with small distances.

Bow Spacer

The bow spacer is used when working with small distances.

When the caliper cannot be removed from a thickness, a filler can be used. The distance must be subtracted from the total distance to obtain the desired thickness.

Caliper with Filler

When the caliper cannot be removed from a thickness, a filler can be used. The distance must be subtracted…

Inside calipers are used to measure hollow objects or internal holes.

Inside Caliper

Inside calipers are used to measure hollow objects or internal holes.

For very accurate measurements micrometer calipers are used.

Micrometer Caliper

For very accurate measurements micrometer calipers are used.

Outside calipers are used to measure solid objects.

Outside Caliper

Outside calipers are used to measure solid objects.

Transfer the caliper to a scale to receive measurement.

Reading the Inside Caliper

Transfer the caliper to a scale to receive measurement.

Transfer the caliper to a scale to receive measurement.

Reading the Outside Caliper

Transfer the caliper to a scale to receive measurement.

The transfer caliper is provided with a false leg which is set so that the caliper may be opened and then brought back to the same position after removing from the casting.

Transfer Caliper

The transfer caliper is provided with a false leg which is set so that the caliper may be opened and…

For very accurate measurements vernier calipers are used.

Vernier Caliper

For very accurate measurements vernier calipers are used.

A center screw bow to draw circles. The adjustable screw is in the middle of the bow.

Center Screw Bow

A center screw bow to draw circles. The adjustable screw is in the middle of the bow.

A test to check if the compass is aligned by bending the knuckle joints together and bringing the points together.

Compass Alignment

A test to check if the compass is aligned by bending the knuckle joints together and bringing the points…

Compass beam is used for large circles a compass or a lengthening bar cannot draw.

Beam Compass

Compass beam is used for large circles a compass or a lengthening bar cannot draw.

The modern cylindrical compass is used depending on personal preference.

Cylindrical Compass

The modern cylindrical compass is used depending on personal preference.

A compass used to draw precise circles and arcs in mechanical drawing.

Drafting Compass

A compass used to draw precise circles and arcs in mechanical drawing.

The modern regular compass is used depending on personal preference.

Regular Compass

The modern regular compass is used depending on personal preference.

The modern Richter compass is used depending on personal preference.

Richter Compass

The modern Richter compass is used depending on personal preference.

For larger circles beam compasses are used. The two parts called channels which carry the pen and the needle point are clamped to a wooden beam at a distance equal to the radius of the circle. The thumb nut underneath one of the channel pieces makes accurate adjustment possible.

Beam Compasses

For larger circles beam compasses are used. The two parts called channels which carry the pen and the…

A pencil sharpened in a conical point. Conical points will wear away faster than a wedge or flat point.

Conical Point of Pencil

A pencil sharpened in a conical point. Conical points will wear away faster than a wedge or flat point.

This mechanical drawing depicts a cotton press; used to compress cotton.

Press, Cotton

This mechanical drawing depicts a cotton press; used to compress cotton.

A homemade section liner device made by slipping a wooden block to hold the triangle to make cross hatching lines.

Section Lining Device

A homemade section liner device made by slipping a wooden block to hold the triangle to make cross hatching…

A hairspring dividers is a divider with a adjustable screw on the leg.

Hairspring Dividers

A hairspring dividers is a divider with a adjustable screw on the leg.

The proportional dividers are used to enlarge or reduce size of the images, and commonly used in map work and patent office drawings.

Proportional Dividers

The proportional dividers are used to enlarge or reduce size of the images, and commonly used in map…

This is an architectural tool, which facilitates the use of drawing straight lines and right angles, similar to modern T-squares.

Drafting Appliance

This is an architectural tool, which facilitates the use of drawing straight lines and right angles,…

A hand holds and employs a drafting compass, a device used to create precise arcs and circles in mechanical drawing.

Hand Holding a Drafting Compass

A hand holds and employs a drafting compass, a device used to create precise arcs and circles in mechanical…

A T-square is a technical drawing instrument, primarily a guide for drawing horizontal lines on a drafting table. It is used by draftsmen. It is also used to guide the triangle that draws the vertical lines.

Architects Drafting Square

A T-square is a technical drawing instrument, primarily a guide for drawing horizontal lines on a drafting…

A drawing board is usually made of well-seasoned and straight-grained soft pine, the grain running lengthwise of the board.

Drawing Board

A drawing board is usually made of well-seasoned and straight-grained soft pine, the grain running lengthwise…

This is the standard layout for plates.

Drawing Board Setup

This is the standard layout for plates.

A device used to transfer drawing onto opaque paper using bright tin, two showcase lamps, and plate glass. The drawings can be copied in pencil on heavy paper or Bistrol—board.

Transparent Drawing Board

A device used to transfer drawing onto opaque paper using bright tin, two showcase lamps, and plate…

"Measurement of distance on a map by means of an engineer's scale." -U.S. Chief of Engineers

Engineer's Scale

"Measurement of distance on a map by means of an engineer's scale." -U.S. Chief of Engineers

This erasing shield can erase multiple sizes and shapes.

Oval Erasing Shield

This erasing shield can erase multiple sizes and shapes.

An erasing shield of thin metal is convenient in erasing desired shapes.

Straight Line Erasing Shield

An erasing shield of thin metal is convenient in erasing desired shapes.

To make a blueprint, place the tracing in a blueprint frame with the inked side next to the glass and lay a sheet of blueprint paper with the sensitized side next to the tracing. Put the back of the frame in place and lock it in position so as to hold the tracing paper. Expose to sunlight for 30 seconds.

Frame Blueprint

To make a blueprint, place the tracing in a blueprint frame with the inked side next to the glass and…

A blue print frame used to make copies of mechanical drawing. The process is done by exposing a sensitized paper in contact with the tracing paper to the light source in the frame. A chemical reaction takes place when washing with water to create a strong blue color, creating the image.

Blue Print Frame

A blue print frame used to make copies of mechanical drawing. The process is done by exposing a sensitized…

A French Curve is used by connecting sufficient points to sketch a curve. The sketch should be line lightly with pencil, without losing points, until the a smooth line is drawn.

Using French Curve

A French Curve is used by connecting sufficient points to sketch a curve. The sketch should be line…

An ellipse French curve, or irregular curve, is used to draw short elliptical radius curves by using points.

Ellipse Curve French Curves

An ellipse French curve, or irregular curve, is used to draw short elliptical radius curves by using…

A Logarithmic Spiral French curve, or irregular curve, is used to draw short elliptical radius curves by using points. The log curve is approximately closely shaped to a cycloid and other mathematical curves.

Logarithmic Spiral Curve French Curves

A Logarithmic Spiral French curve, or irregular curve, is used to draw short elliptical radius curves…

A Polar Spiral French curve, or irregular curve, is used to draw engineering diagrams and steam curves, and is plotted by using the polar equation.

Polar Curve French Curves

A Polar Spiral French curve, or irregular curve, is used to draw engineering diagrams and steam curves,…

A regular bottle holder that prevents the ink bottle from spilling onto the drawing, table or floor.

Ink Bottle Holder

A regular bottle holder that prevents the ink bottle from spilling onto the drawing, table or floor.

A hook-spring with bow point to draw circles.

Hook-Spring Bow with Bow Points

A hook-spring with bow point to draw circles.

Section liners are used to make a series of diagonal lines to create cross hatching.

Section Liner

Section liners are used to make a series of diagonal lines to create cross hatching.

The Universal Drafting Machine is used in a large drafting room. It combines the functions of T-square, triangle, scale, and protractor to save time in machine drawing and civil engineering work.

Universal Drafting Machine

The Universal Drafting Machine is used in a large drafting room. It combines the functions of T-square,…

A simple pantograph used to reducing or enlarging images by using a pivot while drawing the larger image.

Pantograph

A simple pantograph used to reducing or enlarging images by using a pivot while drawing the larger image.

An illustration of a suspended pantograph has metal arms to resize images accurately in engineering work.

Suspended Pantograph

An illustration of a suspended pantograph has metal arms to resize images accurately in engineering…

A hook-spring pen point to draw circles.

Pen Point Hook-Spring Bow

A hook-spring pen point to draw circles.

A standard sized pen point spring bow to draw circles.

Pen Point Spring Bow

A standard sized pen point spring bow to draw circles.

The curve pen is made with a swivel to draw free hand curves and contours.

Curve Pen

The curve pen is made with a swivel to draw free hand curves and contours.

Dotting pen is used to create five different dotted and dashed lines. The dot lengths can be varied by changing the angle of the handle.

Dotting Pen

Dotting pen is used to create five different dotted and dashed lines. The dot lengths can be varied…

The Double pen is used to draw parallel lines up to 1/4 inches apart.

Double Pen

The Double pen is used to draw parallel lines up to 1/4 inches apart.

Drop pen, or rivet pen, can make small circles faster than the bow pen. The pen is useful in bridge work, constructional work, and topographical drawing.

Drop Pen

Drop pen, or rivet pen, can make small circles faster than the bow pen. The pen is useful in bridge…

A hinged ruling for pen easy cleaning. Ruling pens are useful in drawing with ink.

Hinged Ruling Pen

A hinged ruling for pen easy cleaning. Ruling pens are useful in drawing with ink.

An oval nib ruling pen for easy cleaning. Ruling pens are useful in drawing with ink.

Oval Nib Ruling Pen

An oval nib ruling pen for easy cleaning. Ruling pens are useful in drawing with ink.

The Payzant pens, sized 1 to 6, are used for large single stroke lettering.

Payzant Lettering Pen

The Payzant pens, sized 1 to 6, are used for large single stroke lettering.

The railroad pen is used to draw parallel lines.

Railroad Pen

The railroad pen is used to draw parallel lines.

The ruling pen with spring blade for easy cleaning. Ruling pens are useful in drawing with ink.

Ruling Pen

The ruling pen with spring blade for easy cleaning. Ruling pens are useful in drawing with ink.

A ruling pen with clamp for easy cleaning. Ruling pens are useful in drawing with ink.

Ruling Pen with Clamp

A ruling pen with clamp for easy cleaning. Ruling pens are useful in drawing with ink.

A ruling pen with hook for easy cleaning. Ruling pens are useful in drawing with ink.

Ruling Pen with Hook

A ruling pen with hook for easy cleaning. Ruling pens are useful in drawing with ink.

The Shepard pens are used for large single stroke lettering.

Shepard Lettering Pen

The Shepard pens are used for large single stroke lettering.

A Swede pen or a detail pen useful for a large work.

Swede Pen

A Swede pen or a detail pen useful for a large work.