Screw Conveyor



Screw conveyors assist in moving, or conveying items such as:

packages, equipment, food, or products from one area to another,

These conveyors are able to transport dry, loose materials between places

such as pits, trucks, barrels, rail cars, silos, hoppers, and vats.

screw conveyors can be found in a wide range of industries and applications,

such as: construction, oil and gas, mining, chemical, pharmaceutical, plastic, food processing and agricultural. In farming and agriculture,  screw conveyors are used as a part of machinery, like balers or threshers,   in conveying grains and animal feed to various locations. In food processing,  screw conveyors transport dry ingredients—such as nuts, salt, and flour—that are used in making food products.

The construction industry uses industrial screw conveyors to mix wet and dry ingredients to produce plaster or cement.


Screw conveyors work by rotating bulk materials from one location to another.

They operate on the principle of Archimedes’ screw.

Archimedes’ screw principle says this:

When a revolving screw or auger is correctly installed inside a tube or cylinder,

it can move water in the direction you have chosen. In addition,

every time the screw rotates, it will let new material into the tube.

Screw conveyors move material at a predetermined flow rate.  Depending on the application, this flow rate may be measured by cubic feet per hour,  pounds per hour or tons per hour. Their power may come from electricity,

Most screw conveyors contain the following components:

A conveyor screw, also known as a spiral blade or helicoid flighting

A screw conveyor trough or tubular casing

A drive unit (a shaft coupling and shaft seal or a chain drive)

The drive mechanism

The conveyor screw (a spiral blade coiled around a shaft) is housed inside the tubular casing,

Where it is driven at one end and held at the other.  The trough may or may not feature a trough cover. Sometimes, screw conveyors feature a spiral blade, but no shaft.  In this case, they are called shaft less screw conveyors, and the blade is driven at one end and free at the other.


Benefits of screw conveyors include:

gentle material handling and mixing,

system speed and efficiency,

low investment costs and system durability. Of all the conveyor systems,

screw conveyors cost the least to purchase and maintain.

They are also adaptable, customizable and endlessly versatile.

Other Applications:-

They can process materials as diverse as:

Lead oxide, whey, fiberglass, vitamins, Epsom salts, garlic powder,  flour, cocoa beans, ferric sulfate, gypsum, caffeine powder, and carbon black.