Terrier Extruders
Robust, Durable, High Volume Processing & Easy to Maintain
THE BONNOT COMPANY OFFERS A LINE OF TERRIER EXTRUDERS TO COST EFFECTIVELY MEET YOUR MOST DEMANDING REQUIREMENTS.
IN CONTINUOUS OPERATION AT CUSTOMER FACILITIES SINCE THE 1950s
These heavy-duty, robust designs are employed in the most severe environments. The basic designs are configured with segmented cast screw segments and heavy duty thrust bearings that offer years of low-cost operation. We have customers with Terriers in continuous operation since the 1950’s! Bonnot Terrier Extruders are designed with large hopper openings for high volume production. They can be configured with a counter rotating packer in the hopper above the screw to enhance feeding of difficult materials.
Extruder Design Features
1High Torque Drive
2Robust Gear Box
3Jacketed, Grooved Barrel (optional)
4Counter Rotating Packer
5Jacketed Hopper (optional)
ADVANTAGES AT A GLANCE
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Widest Output Range, Consistent Across Scale
The Terrier covers the widest output range in the Bonnot product line, from laboratory quantities through to high-volume continuous production, across a mechanically consistent series that allows the same process chemistry and screw geometry to scale from research through to commercial manufacturing without re-development. This consistency is the primary commercial argument for the Terrier in pilot-to-production development programmes, where the cost and time associated with re-optimising a process for an architecturally different production machine can exceed the value of the initial development work.
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Feed System Matched to Material at Point of Specification
The SP and NP configuration options mean that the feed system is factory-matched to the flow characteristics of the material from the point of specification, rather than being adapted in the field after commissioning. SP machines carry an integral single-packer that handles bridging and surge-prone materials.
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Durable Drivetrain with Fast Changeover
The heavy-duty helical or planetary gearbox with variable-speed motor provides smooth torque delivery across the full speed range — a property that reduces screw wear. Jacketed barrel sections and optional rotary union auger conditioning allow independent heating and cooling of the material as it travels through each zone, while standard flange interfaces allow die changeover in minutes rather than hours.
PRODUCT INFORMATION
The Bonnot Terrier is the company’s core general-purpose single-screw extruder, available from 1″ nominal through 8″ and designed for the widest possible range of clay and firelogs. The Terrier’s construction centres on a segmented, cast carbon steel screw and hardened barrel, supported by a heavy-duty gearbox and variable-speed drive. Output scales from bench-top laboratory quantities on the 1″ unit through to high-volume continuous production on the 8″ model, making the Terrier equally suitable for formulation development work and large-scale commercial manufacturing.
Two feed configurations are available across the series: the SP (Single Packer) variant, which adds an integral force-feed hopper for materials that bridge or surge under gravity, and the NP (No Packer) configuration, which serves free-flowing and pre-plasticised feeds without the additional mechanical complexity of an upstream packer. Jacketed barrel sections and rotary union auger conditioning are available throughout the range, and the open-frame construction facilitates cleaning and die changeover – properties that reduce downtime on multi-product lines and accelerate formulation development cycles in pilot environments.
INDUSTRIES AND MATERIALS SERVED
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01
Food, Pet Food, and Confectionery
Terrier extruders in food-grade stainless steel process snack doughs, breakfast cereal intermediates, pet food pastes, and confectionery masses. The variable-speed drive provides precise texture control at low shear rates - a requirement for structured food products where over-shearing at the screw causes loss of the particulate texture that differentiates a premium product from a homogenised one.
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Firelog, Biomass, and Combustion Products
The Terrier-architecture machine processes wax-impregnated sawdust, compressed biomass, and fire-starter compositions into cylindrical logs and briquettes. The high-pressure barrel capability manages the dense, abrasive feedstocks involved, while the SP feed system handles the inconsistent flow behaviour of sawdust and biomass blends that resist gravity feeding in standard hopper geometries.
8" Terrier with Packer
High volume robust design extruder.
available in a range of sizes
1 Series NP
- Output
- 5-15lbs/hour
- Layout
- 21" x 22" x 16"
- Hopper Opening
- 3” x 2.4”
- Power
- 0.5 - 3 HP
FREE FEASIBILITY TESTING
WANT TO PROVE IT OUT?
The Bonnot test facility offers free feasibility trials across the full Terrier range — different sizes, feed configurations, screw geometries, and full material testing
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BROWSE THE FULL RANGE
EARLY RESEARCH
EXPLORE OUR FULL RANGE
Not sure which size or feed configuration fits your process? We'll help you match your material and output target to the right build.
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SCHEDULE A CONSULTATION
TECHNICAL EVALUATION
BOOK A TECHNICAL CONSULTATION
Discuss screw geometry, packer options, and scale-up directly with a Bonnot process engineer.
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READY TO TRIAL
BOOK A FREE TRIAL RUN
Bring your material to our facility. We'll run a trial, measure key parameters, and send you samples.
