The Bonnot Company · Founded 1891

Custom single-screw extruders

The Bonnot Company designs and manufactures ISO Certified custom single-screw extruders for industrial processing of food, rubber, catalysts, ceramics, and specialty materials. Since 1891, Bonnot has built a global reputation for rugged, low-maintenance extruder systems — with thousands of machines in active service across industries worldwide.

  • 130+ Years in operation

  • 1,000s Extruders in service globally

  • ISO Certified

Prove your process before you build

The Bonnot test facility allows prospective customers to validate extrusion feasibility with their actual materials — before any capital commitment. The facility includes multiple extruder designs, interchangeable screw geometries, a full range of forming dies, temperature control systems, inline mixers, and material characterization equipment.

Feasibility testing is appropriate for new material formulations, novel product geometries, or applications where extrusion has not previously been attempted. Results inform extruder selection, screw design, and die specification for production.

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What we build

Custom single-screw extruders for demanding applications

Bonnot extruders are engineered around three principles: simplicity of design, ease of maintenance, and structural durability. Every machine is built to run continuously in industrial environments — not to require constant intervention. We supply extruders ranging from bench-scale lab units for R&D testing to high-volume production machines (the Terrier line) capable of processing thousands of kilograms per hour. All configurations can be matched to specific screw geometries, die formats, temperature controls, and downstream cutter or feeder integrations.

Built for the industry. Specified for the application.

Catalyst Extruders

Carbon Extruders

Clay Extruders

Rubber Extruders

Sealant Extrusion

Food Forming Extruders

Rodenticide Extruders

Hydrocolloid Extruders

Cooking Extruders Materials

Firelog Extruders

ISO Quality Policy Statement

It is the policy of The Bonnot Company to provide our customers with products which are continually improving to meet or exceed their requirements in a timely manner.

We are also committed to complying with applicable requirements and improving the effectiveness of QMS. The responsibility to achieve these objectives is shared by all of our employees.
About The Bonnot Company Extruders, Cutters & Feeders
For over 130 years, The Bonnot Company has dedicated itself to the production of extruders and extrusion equipment. Throughout our rich history, Bonnot has adhered to a ‘rugged’ design philosophy in the development of our extruders. We prioritize simplicity, low maintenance, and long-life designs, earning the loyalty of numerous customers worldwide.

Extruders play a pivotal role in shaping various materials, resulting in a wide array of usable products. For instance, our food extruders contribute to the creation of breakfast cereals and pre-formed snacks, ensuring uniformity and quality through controlled pressure and temperature. Similarly, our food forming extruders are instrumental in crafting pet food and treats, maintaining consistency and quality for our beloved furry companions. These extruders can be employed independently or in conjunction with cooking extruders for unitized cooking and cooling processes.

In diverse industries, catalyst extruder machines find application in producing catalysts like high aluminas, gels, kaolin carriers, molecular sieves, and more. Bonnot offers extruders tailored to meet specific needs, whether it’s for producing minute pellets, solid rods, unsupported rings, or other catalyst configurations.

Rubber extruders from The Bonnot Company serve multiple purposes, including the creation of extruded hydrogels. These hydrogels are utilized in the manufacture of items ranging from contact lenses to replacement cartilage. Our rubber extruders excel at breaking down large, tacky rubber bales without the need for talc or special chemicals.

Extrusion equipment extends its reach to essential components for home purification systems. Originally employed in the clay industry for de-airing products, vacuum extruders are now utilized to create activated carbon. This process enhances the carbon’s adsorptive properties, preparing it for use in various air and water purification applications. At Bonnot, our expertise spans a wide range of base materials beyond activated carbon, and our test facility stands ready to demonstrate how extrusion can work for you.

Capacity serves as another distinguishing factor. For substantial batches and maximum output, a company might opt for a High Volume Production Extruder (Terrier), for instance. Conversely, a research and development-focused company may find value in low-volume Lab Extruders, suitable for producing and testing products in smaller quantities. The optimal solution varies depending on applications, volumes, shapes, and materials required for the task at hand.

To embark on your custom extruder journey with The Bonnot Company, reach out to us. We collaborate closely with you to comprehend your goals and needs, offering tailored extruder recommendations. Our inventory includes lab-scale, small, and mid-production extrusion equipment, and we also specialize in developing custom extrusion equipment to align with your specific applications. Start your extrusion endeavors with The Bonnot Company today.

Our History

133 years of extrusion engineering

The Bonnot Company was founded in 1891, initially serving the brick and clay industry. Over the following century, the company expanded its material capabilities to include soap, food, rubber, and industrial ceramics. Today, Bonnot is recognized as the global leader in extruders for catalyst and rubber processing — two technically demanding categories where machine reliability and output consistency are non-negotiable. The company's design philosophy has remained consistent: rugged construction, mechanical simplicity, and long service life. Many Bonnot machines remain in active production service after decades of continuous operation.
Our History Our History

Frequently asked questions

What types of materials can Bonnot extruders process?
Bonnot extruders process a wide range of materials including food pastes and doughs, natural and synthetic rubber, catalyst precursors (alumina, silica, zeolite-based), activated carbon, hydrogels, ceramics, clay, and specialty polymers. The company's test facility can evaluate feasibility for materials not listed here.
What is a single-screw extruder, and when is it the right choice?
A single-screw extruder uses one rotating screw inside a heated or cooled barrel to convey, compress, and force material through a shaped die. It is well-suited to materials with consistent viscosity and where continuous output is required. Bonnot single-screw designs are particularly effective for pastes, hydrated powders, rubber compounds, and catalyst supports that require controlled pressure without high shear.
Does Bonnot build custom extruders, or only standard models?
Bonnot builds both. Standard configurations are available across the lab, mid-production, and Terrier high-volume product lines. Custom extruder development is offered for applications with non-standard material requirements, output geometries, or process integration needs. Custom projects begin with a consultation to define specifications.
What does feasibility testing at the Bonnot test facility involve?
Feasibility testing uses Bonnot's in-house equipment — multiple extruder types, screw geometries, die sets, and material testing instruments — to process a customer's actual material. The goal is to determine whether extrusion is viable, which configuration performs best, and what parameters (temperature, screw speed, die geometry) optimize output quality.
How long has Bonnot been making extruders?
The Bonnot Company has manufactured extrusion equipment continuously since 1891 — over 133 years. The company began with brick and clay extruders and has expanded across food, rubber, catalyst, carbon, and specialty materials markets.
What industries does Bonnot specialize in?
Bonnot's deepest specializations are catalyst processing and rubber processing, where the company holds global market leadership. The company also has long-standing expertise in food extrusion, activated carbon, ceramics, and hydrogel applications. The test facility supports exploration of new market applications.
What is Bonnot's quality policy?
Bonnot's stated quality policy is to provide products that continuously improve to meet or exceed customer requirements, delivered in a timely manner. This commitment is reflected in the company's design approach: machines built to last, with simple mechanics that operators can maintain without specialized expertise.

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Specify your extruder or request a feasibility test

Contact The Bonnot Company to discuss your application. Bonnot engineers work directly with customers to define material requirements, select the appropriate extruder platform, and configure screw geometry and tooling for target output specifications.