BullDog Bowden Extruder - Bull Dog - 3D Printer Prusa RepRap 1.75 3.00

The BullDog Bowden extruder is a heavy-duty filament drive built for Prusa, RepRap and other DIY 3D printers running 1.75 mm or 3 mm filament.

The extruder mounts on the printer frame and pushes filament through a PTFE tube to the hot end. As a result, the moving carriage stays light, which makes higher print speeds possible. The injection-moulded body resists flex, so the BullDog Bowden extruder grips filament reliably even under load.

Key Features of the BullDog Bowden Extruder

• Injection-moulded body for rigid, repeatable filament feeding
• Compatible with both 1.75 mm and 3 mm filament
• Hardened drive gear delivers high torque on stiff and flexible filaments
• NEMA 17 mounting pattern for standard stepper motors
• Two pneumatic push-fit couplers included for fast PTFE tube changes
• Spring-loaded idler arm with adjustable tension

Use Cases

• Converting a direct-drive Prusa i3 or RepRap Mendel to a Bowden setup
• Running a lightweight CoreXY or delta print head at higher speeds
• Driving a remote E3D V6 or J-head hot end across long Bowden tubes
• Replacing a worn or slipping plastic extruder on an older RepRap build

Works Well With

• Bulldog Extruder E3D V6 Aluminium Mounting Plate — bolts the extruder cleanly to a frame rail and aligns it with an E3D V6 hot end.
• V7 Bowden-style Hot End (V6, 1.75 mm) — pairs naturally with this extruder for a complete Bowden cold-end and hot-end chain.

Project Ideas & Tutorials

• JB's Bowden Dual Extruder (Instructables) — a full Prusa i3 dual-extrusion conversion that walks through Bowden mounting and tube routing.
• 3D Printer Bowden Extruder Setup (YouTube) — visual setup guide covering tensioning, tube fitting and first-print calibration.
• Erik's Bowden Extruder (RepRap Wiki) — the original RepRap reference for Bowden geometry and retraction tuning.
• Bowden Extruder Builds on Hackaday — a tag feed of community Bowden projects, mods and troubleshooting writeups.

Package Contents

• 1 × BullDog Bowden extruder body
• 2 × pneumatic push-fit couplers
• 2 × idler springs
• 1 × extruder drive gear

Free UK delivery

Royal Mail 48 tracked · dispatched same day on orders before 14:00.

Express — £15.98

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