This science ClipArt gallery offers 81 illustrations of a simple machine, screws. Screws are made of a coninuous inclined plane (threads) on a surface, and is used to convert force from rotational to linear, or linear to rotational. The ratio of threads determines the mechanical advantage.

A cylinder with a triple threaded screw in a water tight case that revolves ater to the top for the irrigation of land.

Archime' dean Screw

A cylinder with a triple threaded screw in a water tight case that revolves ater to the top for the…

Archimedean screw, gravity principle. Illustration of an unsuccessful scheme for a perpetual-motion device.

Archimedean Screw

Archimedean screw, gravity principle. Illustration of an unsuccessful scheme for a perpetual-motion…

"A device for raising water, said to have been invented by Archimedes."-Whitney, 1902

Archimedean Screw

"A device for raising water, said to have been invented by Archimedes."-Whitney, 1902

Device for transferring water up from a lower body.

Archimedean Screw

Device for transferring water up from a lower body.

"A machine for raising water, said to have been invented by Archimedes, during his stay in Egypt for draining and irrigating the land." — Chambers' Encyclopedia, 1875

Archimedes Screw

"A machine for raising water, said to have been invented by Archimedes, during his stay in Egypt for…

A machine used for lifting water, thought to have been invented by Archimedes in egypt for draining and irrigating land.

Archimedes' Screw

A machine used for lifting water, thought to have been invented by Archimedes in egypt for draining…

"Invented to raise water. A hollow tube wound spirally around a solid cylinder. As the cylinder is turned, water is fed up through the hollow tube and discharged at the top of the tube." —Quackenbos 1859

Archimedes' Screw

"Invented to raise water. A hollow tube wound spirally around a solid cylinder. As the cylinder is turned,…

"It consists of a tube, made of lead, or strong leather, coiled round a cylinder of wood or iron, as represented..." -Comstock 1850

Archimedes' Water Screw

"It consists of a tube, made of lead, or strong leather, coiled round a cylinder of wood or iron, as…

A carpenter's tool to bore holes with.

Auger

A carpenter's tool to bore holes with.

An auger is a device for moving material or liquid (see Archimedes' screw) by means of a rotating helical flighting. The material is moved along the axis of rotation. For some uses the helical 'flighting' is enclosed in a tube, for other uses the flighting is not encased. An integral part of a drill, the auger of the drill bit, uses this mechanism to remove shavings from the hole being drilled.

Auger

An auger is a device for moving material or liquid (see Archimedes' screw) by means of a rotating helical…

"[Left] Cook's Auger; [Right] Expanding Auger."-Whitney, 1902.

Augers

"[Left] Cook's Auger; [Right] Expanding Auger."-Whitney, 1902.

Common boring tool used with a bit brace. The cutting end has a tapered lead screw, two cutters, and two scoring nickers. The shank is surrounded by a spiral that carries away shavings. The traditional shank end, for use with a bit brace, is a tapered square lug.

Auger Bit

Common boring tool used with a bit brace. The cutting end has a tapered lead screw, two cutters, and…

Carriage bolt is a fastener with a round head with a square head, and tightened by using a nut and wrench. The bolt is commonly used in furniture making.

Carriage Bolt

Carriage bolt is a fastener with a round head with a square head, and tightened by using a nut and wrench.…

A screw with a domed head and square section under the head.

Carriage Bolt

A screw with a domed head and square section under the head.

This carriage bolt has a rounded head and a slotted drive.

Carriage Bolt

This carriage bolt has a rounded head and a slotted drive.

A carriage bolt with a truss head and a wing nut.

Truss Carriage Bolt and Wing Nut

A carriage bolt with a truss head and a wing nut.

Expansion bolt is used to fasten lightweight objects. The bolt has an expansion jacket, where the mechanism expands when tighten.

Expansion Bolt

Expansion bolt is used to fasten lightweight objects. The bolt has an expansion jacket, where the mechanism…

Eye bolt has a looped end with threads at the opposite end. The bolt is primarily used in attaching cables to objects.

Eye Bolt

Eye bolt has a looped end with threads at the opposite end. The bolt is primarily used in attaching…

Hanger bolt is a fastener used in wood working with two different sized threads and some have no center threads.

Hanger Bolt

Hanger bolt is a fastener used in wood working with two different sized threads and some have no center…

A hex bolt used in carpentry is identified by its hexagonal head and (shown here) fully threaded.

Hex Bolt

A hex bolt used in carpentry is identified by its hexagonal head and (shown here) fully threaded.

The hex head bolt and nut illustrated and head, diameter, pitch, and lenght identified.

Hex Head Bolt

The hex head bolt and nut illustrated and head, diameter, pitch, and lenght identified.

A screw used with nuts, driven into tapped holes.

Machine Bolt

A screw used with nuts, driven into tapped holes.

A mechanical apparatus consisting of a continuous moving belt that transports materials or packages from one place to another.

Spiraling Conveyer Belt

A mechanical apparatus consisting of a continuous moving belt that transports materials or packages…

An illustration of an anti-friction conveyor

Anti-Friction Conveyor

An illustration of an anti-friction conveyor

An illustration of a continuous worm conveyor.

Continuous Worm Conveyor

An illustration of a continuous worm conveyor.

An illustration of an early flour mill conveyor.

Early Flour Mill Conveyor

An illustration of an early flour mill conveyor.

An illustration of a paddle worm conveyor.

Paddle Worm Conveyor

An illustration of a paddle worm conveyor.

Double threaded screw.

Double Threaded Screw

Double threaded screw.

"The threads of the screw act upon the teeth cut into the wheel. As the screw turns, each thread catches a tooth on the wheel to rotate the wheel indefinitely." —Quackenbos 1859

Endless Screw

"The threads of the screw act upon the teeth cut into the wheel. As the screw turns, each thread catches…

Hexagonal nut with corners and flats.

Hexagonal Nut

Hexagonal nut with corners and flats.

"Under intense pressure, the smaller threads on the screw may break. Therefore a larger screw with a threaded bottom is used for strength. As the larger screw turns, the smaller screw ascends tightly into the larger." —Quackenbos 1859

Hunter's Screw

"Under intense pressure, the smaller threads on the screw may break. Therefore a larger screw with a…

Machine screw

Machine Screw

Machine screw

Machine screw

Machine Screw

Machine screw

Machine screw

Machine Screw

Machine screw

Machine screw

Machine Screw

Machine screw

Machine screw diagram

Machine Screw

Machine screw diagram

Machine screw diagram

Machine Screw

Machine screw diagram

Machine screw diagram

Machine Screw

Machine screw diagram

Machine screw diagram

Machine Screw

Machine screw diagram

A screw is a cylinder with a groove wrapped helically around its circumference. The groove is called a thread and the distance that the thread is drawn is the pitch.

Simple Machine

A screw is a cylinder with a groove wrapped helically around its circumference. The groove is called…

Micrometer

Micrometer

Micrometer

"The nut, N, through which the screw passes, answers also for one of the beams of the press. If the screw be turned to the right, it wil advance downwards, while the nut stands still." -Comstock 1850

Nut Fixed Screw

"The nut, N, through which the screw passes, answers also for one of the beams of the press. If the…

Wing nut is a fastener with a threaded hole used to keep objects in place. Wing nut can be loosen or tighten by hand.

Wing Nut

Wing nut is a fastener with a threaded hole used to keep objects in place. Wing nut can be loosen or…

"When force is applied at bar P which turns the screw. The plate B moves vertically with the screw, but does not turn. This allows the books to be compressed as the plate descends." —Quackenbos 1859

Bookbinder Press

"When force is applied at bar P which turns the screw. The plate B moves vertically with the screw,…

"A screw is a cylinder with a helical proection winding around its circumference. This helix is called the thread of the screw. The distance that a point of the helix is drawn back or advanced in the direction of the length of the screw during one turn is called the pitch of the screw." —Hallock 1905

Using a Screw to Raise Weight

"A screw is a cylinder with a helical proection winding around its circumference. This helix is called…

A rolling pair of cylinders which metal is passed through to form bars, plates, or sheets.

Spiral Roller

A rolling pair of cylinders which metal is passed through to form bars, plates, or sheets.

"The screw may be considered as a winding wedge; for it has the same relation to a straight wedge that a road, winding up a hill or town, has to a straight road of the same length and activity." — Goodrich, 1844

Screw

"The screw may be considered as a winding wedge; for it has the same relation to a straight wedge that…

A temper screw

Screw

A temper screw

"The screw is the sixth and last simple mechanical power. It may be consdered as a modification of the inclined plane, of as a winding wedge." -Comstock 1850

Screw

"The screw is the sixth and last simple mechanical power. It may be consdered as a modification of the…

"Cylinder with a spiral of winding parallel ridges called Threads. If the Threads were unwound from the cylinder, it would be one continuous wedge." —Quackenbos 1859

Screw

"Cylinder with a spiral of winding parallel ridges called Threads. If the Threads were unwound from…

Screw with lead and pitch.

Screw

Screw with lead and pitch.

An illustration of a screw, which is incline plane wrapped around a cyclinder.

Screw

An illustration of a screw, which is incline plane wrapped around a cyclinder.

An illustration of a screw, which is incline plane wrapped around a cyclinder.

Screw

An illustration of a screw, which is incline plane wrapped around a cyclinder.

The screw is the case of the inclined plane, with the length of one convolution of the thread being the length of the corresponding inclined plane.

Screw

The screw is the case of the inclined plane, with the length of one convolution of the thread being…

"Power is applied to the head of the screw. Each time the screw is turned into the nut, it advances the distance between two of the threads and compresses to that extent any fixed object against which it is directed." —Quackenbos 1859

Screw and Nut

"Power is applied to the head of the screw. Each time the screw is turned into the nut, it advances…

"It is apparent by turning the crank, C, the wheel will revolve, for the thread of the screw passes between the cogs of the wheel. By means of an axle, through the centre of this wheel, like the common wheel and axle, this becomes an axceedingly powerful machine, but...is slow." -Comstock 1850

Screw and Wheel

"It is apparent by turning the crank, C, the wheel will revolve, for the thread of the screw passes…

"In this, the screw is fixed, while the nut, N, by being turned by the lever, L, from right to left, will advance down the screw." -Comstock 1850

Screw Fixed Screw

"In this, the screw is fixed, while the nut, N, by being turned by the lever, L, from right to left,…

"A screw is a cylinder, generally made of wood or metal, with a spiral ridge (the thread) winding about its circumfrence. The thread works in a nut, withihn which there is a corresponding spiral groove to receive the thread." -Avery 1895

Screw press

"A screw is a cylinder, generally made of wood or metal, with a spiral ridge (the thread) winding about…

In the screw press, the screw is turned by means of a lever, which gives a great increase of mechanical advantage.

Screw Press

In the screw press, the screw is turned by means of a lever, which gives a great increase of mechanical…

"The power is generally applied by a wheel or a lever, and moves through the circumfrence of a circle. The distance between the two consecutive turns of any on continuous thread, measured in the direction of the axis of the screw, is called the pitch of the screw." -Avery 1895

Screw with Lever Arm

"The power is generally applied by a wheel or a lever, and moves through the circumfrence of a circle.…