Precision extrusion
for demanding
applications

Bonnot extruders process a broad range of materials including natural and synthetic rubbers, food doughs and pastes (wet and dry), technical ceramics and refractory materials, carbon and graphite electrode paste, catalysts and adsorbents, pharmaceutical polymers for hot-melt extrusion, and various chemical compounds. If your material flows under pressure and temperature, contact Bonnot engineering to discuss feasibility. We have processed more than 50 distinct material categories.

Lead times depend on machine size, complexity, and current shop load. Standard production extruders typically ship in 16–26 weeks from purchase order. Custom or specialty machines with unusual metallurgy or drive systems may require additional time. Replacement screws and wear components for existing Bonnot machines are typically available in 6–14 weeks. Contact Bonnot sales with your specifications for a current lead time estimate.

Yes. Bonnot operates a test facility in Akron, Ohio equipped with production-representative extruders ranging from 1" to 6" screw diameter. Process trials are conducted on a paid basis and generate a formal report documenting throughput, screw speed, melt temperature profile, head pressure, and output quality data. Trial results directly inform the final machine specification and reduce commissioning risk. Contact Bonnot engineering to discuss minimum material quantities and trial scope.

Unfortunately due to liability, we are unable to service extruders that have been made by other manufacturers.

Bonnot single-screw extruders are available in screw diameters from 1 inch (25mm) for laboratory applications up to 24 inches (610mm) for large-scale production. Twin-screw configurations are available in a narrower range appropriate to that machine type. The appropriate screw diameter is determined by throughput requirement, material viscosity, and L/D ratio needed for the process — Bonnot engineers can assist in calculating the correct size for your application.

Yes. Bonnot builds food-grade and pharmaceutical-grade extruders with 316L stainless steel contact surfaces, crevice-free welds, CIP (clean-in-place) compatibility, and surface finishes meeting Ra 32 or Ra 16 requirements. Pharmaceutical machines can be supplied with material traceability documentation and surface finish certifications. FDA-compliant seals and gaskets are specified as standard for these applications. GMP documentation packages are available upon request.

Bonnot maintains engineering drawings for machines built over many decades of production. Replacement screws, barrel liners, end caps, thrust bearings, and drive components are available for most Bonnot extruder models regardless of age. Contact Bonnot with your machine's serial number or original purchase year and a description of the part needed. Bonnot will confirm availability and provide a quotation.

Single-screw extruders develop high pressure efficiently and are well-suited for materials requiring consistent plug flow: rubber profiles, ceramic pastes, food doughs, and materials where shear history must be minimized. Twin-screw extruders provide significantly more intensive and controllable mixing, making them preferable for compounding of filled polymers, reactive extrusion, and applications where multiple ingredients must be dispersively or distributively blended. The appropriate configuration depends on your material's rheology and the process objective. Bonnot engineers can provide a recommendation based on your specific material and output requirements.