Vendor: Bondtech

LGX Large Gears eXtruder - Bondtech

Regular price $3,480.00 TWD Sale price $3,480.00 TWD
Extruder LGX
In stock

Product Includes:

  • LGX ®
    • LGX® Feeder with PA12 housing (Max Working Temperature of 70ºC)
    • Custom Nema17 25mm Pancake Stepper Motor
    • Driect Drive Interface Plug (for Slice Engineering Hotends)
    • 4x M3x18 mm Stud (with 5mm Hex & M3x4 threads)*
  • LGX ® PRO
    • LGX® PRO Feeder with PA12 GF housing (Max Working Temperature of 100ºC)
    • Custom Nema17 30mm Pancake Stepper Motor
    • Aluminum Interface Plug (for Slice Engineering Hotends)
    • 4x M3x23 Stud (with 5mm Hex & M3x4 threads)*
  • Bowden Interface Plug (with threaded metal push-fit).
  • 2mm Hex Key (recommended tool).
  • Product Line Information Brochure.
  • Powered by Bondtech sticker.
  • 3x M3x30 mm Low Head screws.
  • 30mm PTFE tube to use in the Direct Drive Interface Plug.

* These studs are used to replace the 4 screws of the stepper motor for additional mounting points. Make sure not to use too much torque to tighten the studs as the stepper motor threads are delicate & made of aluminum. It is recommended to use finger force only.

IMPORTANT: Before installing the LGX, please read the LGX Wiring Instructions  below. Not all printers are ready for a direct connection with the LGX and may need to be modified.

The Bondtech LGX® Large Gears eXtruder is the first of our filament feeders using Bondtech’s new Dual Drive Technology based on larger drive gears.

Larger Drive Wheels

Bondtech's Dual Drive Technology in the LGX® eXtruder allows you to unlock more precise, reliable, and faster 3D printing. With larger drive wheels that provide increased filament grip, a filament pre-tension lever for repeated results, and a versatile multi-function interface socket for tool and application quick swaps, the LGX redefines your 3D printing experience.

Learn more about LGX pre-tensioning by clicking here.

LGX PRO For Industrial Applications

In addition to the standard benefits of the LGX, the LGX PRO boasts a stronger 30 mm stepper motor and a full-hardened steel drive train. LGX PRO also comes with an extra aluminum interface plug for integrating with longer industrial hotends.

LGX PRO features a tough PA12 GF housing for enhanced mechanical and thermal resistance, up to a max working temperature of 100°C.

    Additinoal Features And Benefits

    • Drive wheels’ maintenance windows for easy cleaning
    • Compact, light, and symmetric design for increased performance and compatibility
    • Multiple mounting hole patterns for an easy and flexible setup
    • A small step for a greener future: craft boxes without bleaching and no coating

    You can read more about the new features by clicking here.


    • e-steps value : 400 using 16 microsteps; 800 using 32 microsteps.
    • 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), back (4 points)
    • Holes on the sides of the LGX™ : 5 mm depth
    • Holes on the bottom of the LGX™ : 12 mm depth
    • Max tightening torque on the extruder screws is 0.3 Nm


      • Requires cable with PHR-6 connector
      • 2 phases
      • DC 3.1 V
      • Max 0.7A / phase
        • To use the LGX®, run the stepper motor with currents between ~0.45 and ~0.65A:
        • Be vigilant regarding the stepper motor surface temperature.
        • Keep it cool enough to touch. Lower Vref otherwise.
      • Class H motor, rated up to 180°C
        • Max recommended environment : 70°C
        • Max temperature at this environment temperature can go up to 130°C on account of the self heating.
      • Download the stepper motor Technical Data Sheet here.

        For Klipper users

        rotation_distance = full_steps_per_rotation * microsteps / steps_per_mm

        rotation_distance = 200 * 16 / 400
        rotation_distance = 8

        The above calculation assumes the following parameters:

        • stepper motor is a 1.8 degrees motor hence 200 as full steps per rotation;
        • microsteps are set to 16;
        • e-steps value recommended for the LGX is 400.

        Although we recommend to use the rotation_distance instead of the gear_ratio, we inform the LGX gearing ratio is 44:14, 37:17.

        • To use the LGX directly attached to the hotends listed below, PTFE tube lengths should be:
          • 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.
        • retraction speed : 35 mm/s
        • retraction distance (bowden) : ~5 mm (0.4 + tube length[mm] x 0.015)
        • retraction distance (direct drive) for rigid materials : 0.4 mm
        • retraction distance (direct drive) for soft materials : 3 mm
        • Max Environment operating temperature : 70°C
        • Recommended stepper motor Current (using LGX) : 0.45 to 0.60 A (RMS)
        • 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.

        Do not connect a LGX® stepper motor to a printer's cable without checking the wires and pins of the connection cable.

        Not all printers are ready for a direct connection with the LGX®. Some use stepper drivers with no protection and this may damage them.

        Before connecting a LGX® to any 3D printer check if the connector pins are wired as shown below:

        After start of service, if the LGX® is turning in the wrong direction, swap the top (or bottom) pair of wires to make a correction:

        You may be interested to know

        How to identify the coils on a Creality stepper motor

        How to identify the coils on a Bondtech stepper motor

        Reversing feeding direction by swapping the coils' wires


        The LGX extruder – How It’s Made