
The Bondtech LGX Large Gears eXtruder is the first of Bondtech's filament feeders using Bondtech’s new Dual Drive Technology based on larger drive gears.
7 new features on the Bondtech LGX eXtruder:
- Larger drive wheels for increased filament grip
- Filament pre-tension lever for repeated results
- Multi-function interface socket for tool or application quick swap
- Drive wheels’ maintenance windows for easy cleaning
- Compact, light, and symmetric design for increased performance and compatibility
- Multiple mounting hole patterns for easy and flexible setup
- A small step for a greener future: craft boxes without bleaching and no coating
3D Printed Housing using PA12
The housing parts are professionally printed with nylon for maximum strength and precision and higher temperature resistance.
Designed With Flexibles In Mind
The LGX For Flexibles Set is a special setup that contains the parts necessary to create, with the LGX eXtruder, a print head that will excel at printing most materials and especially soft and flexible filaments. This set includes a reversible heat sink that can be installed on the left-hand or right-hand side of the cold block. The heat sink also includes a hole pattern for attaching 40×40 fans.
Main Advantages
- Gives access to softer materials
- Enables you to print flexible and soft materials faster
- Keeps the print-head small and lightweight
- Allows for many different mounting options
The Bondtech LGX eXtruder Can Be Combined With:
-
The Mosquito® Hotend
- Mosquito® Magnum
- Mosquito® Liquid
- The Copperhead™ Screw Mount Hotend
- Copperhead™ LGX Heat Break (LGX Flexibles Set Needed)

Each LGX extruder is supplied with:
- 1x LGX feeder
- 1x Custom LDO Nema17 25mm pancake stepper motor
- 1x Bowden Interface Plug (with threaded metal push-fit)
- 1x Direct Drive Interface Plug (for Slice Engineering® Hotends)
- 1x 2mm Hex Key (recommended tool)
- 1x Product Line Information Brochure
- 1x Powered By Bondtech sticker
Each LGX FF Set is supplied with:
- 1x LGX Black Anodized Aluminum Heat Sink
- 1x LGX Black Anodized Aluminum Air Cooled Cold Block
- 1x LGX Air-Cooled Cold Block Mounting Hardware
- 1x Copperhead™ LGX Heat Break
- 1x Copperhead™ Hot Block
- 1x Bondtech M6x1x7.5 Coated Brass Nozzle 0.4mm
Note: The extruder and LGX add-ons only support 1.75 mm filament
Technical Specifications:
LGX eXtruder
- e-steps value: 400 on 16-bit micro-stepping setups; 800 on 32-bit micro-stepping setups
- Drive wheels: hardened steel
- Materials compatibility: abrasive, rigid, semi-flexible, flexible, and soft
- Mounting holes: M3
- Mounting patterns: bottom anterior (2 points), left (2 points), right (2 points), front (4 points), and back (4 points)
- Holes on the sides of the LGX: 5 mm depth
- Holes on the bottom of the LGX: 12 mm depth
- retraction speed: 35 mm/s
- retraction distance (bowden): ~5 mm (0.4 + tube length x 0.15)
- retraction distance (direct drive) for rigid materials: 0.4 mm
- retraction distance (direct drive) for soft materials: 3 mm
- Max operating temperature: 80°C
- LGX DD net weight: 218.6 g
- LGX B net weight: 224 g
- Package measurements: 80x103x73 mm
- Package weight: 269 g
- Download the LGX Technical Drawings here

LDO Stepper Motor For Bondtech LGX
- PH-06AWJ connector
- 2 phases
- DC 5.5 V
- Max 1.0A/phase
- Download the stepper motor Technical Data Sheet here
LGX FF Set
- Cold Block Material: Anodized Aluminum
- Heat Sink Material: Anodized Aluminum
- Copperhead™ Hot Block Materials: steel tube, copper body, and nickel plating
- Max operating temperature: 450°C
- LGX FF Set net weight: 55.5 g
- Package measurements: 80x103x73 mm
- Package weight: 96 g
STEP Files To Download
Click the links below to download STEP files with simplified geometries of each available setup.
- LGX Direct Drive with Copperhead Screw Mount Hotend
- LGX For Flexibles with Right-Hand Side Heatsink and Fan
- LGX For Flexibles with Left-Hand Side Heatsink and Fan
Note: To use the Direct Drive Interface Plugs with the Slice Engineering® Hotends, it is recommended to use a PTFE tube between the extruder and the heat break. Below is some useful additional information:
PFTE Tube Lengths:
- Old Mosquito/Mosquito Magnum : 10 mm
- New Mosquito/Mosquito Magnum : 11 mm
- Copperhead screw mount : 30 mm
- PTFE tube should be cut straight on both ends
- Slight chamfer inside is recommended, but not mandatory
Replacement Parts
Looking to replace your LGX Copperhead Heat Break, click here.