Leading Screw Feeder Manufacturers

A perplexing problem that faces every material management manager is finding the most economical and efficient method for moving, storing, and supplying raw materials to production. Traditionally, the first thing that these supply chain experts think of is some form of belt conveying system, which is great for moving large parts and boxes but not small granular materials. Read More…

Screw Feeders A perplexing problem that faces every material management manager is finding the most economical and efficient method for moving, storing, and supplying raw materials to production. Traditionally, the first thing that these supply chain experts think of is some form of belt conveying system, which is great for moving large parts and boxes but not small granular materials.

We are a US based, family owned company specializing in the design and manufacturing of screw conveyors in all configurations: vertical, inclined, shaftless, live bottom, plug screws, feeders, mixers, heating/cooling, FDA/USDA approved, screw presses and more.

Conveyor Engineering & Mfg. Co. $$$

VAC-U-MAX is a manufacturer specializing in screw conveyors and transportation systems, load filling machines, bulk bag loaders, grinders, pulverizers and sifters. The company serves the chemical, food and feedmill industries with highly efficient products.


ISC Manufacturing LLC has specialized in screw conveyor manufacturing since 1976. Experts in the field of CNC machining, ISC designs & manufactures custom feeders, mixing & drag conveyors, bucket elevators, ribbon & paddle mixers, chutes & more. Our screw conveyor technology is such that our conveyors are capable of conveying, feeding, elevating & mixing. Ask about our service repair center!

ISC Manufacturing LLC $$$

Spiroflow Systems has more than 40 years of experience in the design, manufacture & installation of bulk material handling equipment & systems. Product innovation & a thorough understanding of customers’ needs & objectives keep Spiroflow at the forefront of the industry. Spiroflow Systems offers flexible screw, aero mechanical, pneumatic, tubular cable & chain drag conveyors as well as bulk...

Spiroflow Systems, Inc. $$$

For over 40 years, CDM’s mission has been to use our excellent application knowledge and customer service to provide our clients with superior solutions. We have grown to become a world leader in the manufacturing of conveying systems, conveyor chains, and material handling equipment. Industries we serve include minerals and mining, pulp and paper, and potash and fertilizer. Contact us today...

CDM Systems, Inc. $$$

At Syntron Material Handling, we pride ourselves on our innovative screw machine products that redefine efficiency and reliability in material handling solutions. With years of expertise and dedication to excellence, we offer a comprehensive range of screw machines designed to meet the diverse needs of industries worldwide.

Syntron Material Handling $$$
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placeholder image Conveyor Engineering & Mfg. Co. VAC-U-MAX ISC Manufacturing LLC Spiroflow Systems, Inc. CDM Systems, Inc. Syntron Material Handling

The feed screw mechanism, that has been around since ancient Egypt, is a screw conveyors that can efficiently and economically move powders, granular materials, wood chips, saw dust, and powdery materials from storage to production. Available in an assortment of feed screw designs and configurations of any size, these rapid feed screw mechanisms are the perfect solution for supplying production directly from storage.

What is a Screw Feeder?

A screw feeder, in simplest terms, consists of a tube with a feed screw down the center. As raw materials are fed into the tube, the feed screw turns and moves the material along to a discharge unit located at the end of the tube. The type of screw and the angle of its blades controls the volume of material that is moved at each turn.

As simple as this description may be, it does not cover the necessary engineering expertise needed to design a proper feeding mechanism. There are a number of factors required to determine the use of this conveyance device. The first consideration is the pitch of the blades of the screw, which has to be perfect to fit the characteristics of the product.

Prior to determining the pitch. The distance between the blades has to be calculated since that will determine the amount of product for each flight, the flight being the area between the blades. Once the flight is decided, the pitch has to be calculated such that it isn’t too great to cause the feeder to jam or too small to not move a sufficient amount of product. These design factors are carefully calculated to ensure optimum performance.

Types of Screw Feeders –

As with any type of conveyance device, screw feeders have to be designed to exactly fit the requirements of the product to be moved. This factor is an essential part of the decision process and determines the type of screw feeder, feeding mechanism, and speed of conveyance.

Though the design of feeders seems rather simple, there are variations to fit every type of product. The most obvious difference is in the type of screw, which can be tapered, have variations in pitch, or be a combination of factors. The main consideration is the type of material since a different type of feeder is required for grain than is used for powders.

Benefits of Screw Feeders –

The first and most prominent factor regarding the benefits of a screw feeder is its durability. Unlike conventional feeding methods, a screw type feeder is made from durable materials that are not pliable but are engineered to last. From the hopper to the discharge, every element of a screw feeder is solid state metal that is designed for longevity and endurance.

Another benefit of a screw method of feeding is speed, which can be varied according to the need of production. In operations that require products to be mixed and finished in a set time, screw feeders are the best choice.

Screw Conveyors Power Pages

Bucket Conveyors

Bucket Conveyors

A bucket elevator or grain leg is used to move items in bulk. The usage of bucket elevators is widespread, notably in commercial agriculture and mining, and several specialized businesses manufacture bucket elevators and...

Screw Conveyors

Screw Conveyors

Screw conveyors, or auger conveyors, are industrial equipment used in transporting bulk quantities of granular solids (e.g., powder, grains, granules), semi-solids, liquids, and even non-flowing materials from one point to another...

Conveyor Systems

Conveyor Systems

A conveyor system is a method for moving packages, products, supplies, parts, and equipment for production, shipping, or relocation. The different types of conveying systems include pneumatic, screw, belt, and roller. The construction of individual systems depends on the materials...

Conveyor Belts

Conveyor Belts

A conveyor belt is a material handling system designed to move supplies, materials, and components using an efficient and effortless process that saves on time, energy, and cost. The design of conveyor belts includes two motorized pulleys with the conveyor material looped over them...

Flat Belts

Flat Belt

Flat belts are power transmission belts that are flat and made of rubber, synthetic composites, or leather. They are used to transfer rotational power in industrial equipment and conveyor systems. Flat belts have a low profile...

Pneumatic Conveying

Pneumatic Conveying

Pneumatic conveying is a method for transferring bulk materials, like powders and granules, using compressed gas or air, from one processing center to another. Material is moved through an enclosed conveying line or tube using a combination of pressure differential and airflow from a blower or fan...

Bulk Material Handling
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