Extruder system
Bondtech LGX and LGX Lite: filament size and E-steps
Bondtech's LGX takes 1.75 mm filament only. The original LGX Lite's 562 E-steps and Klipper gearing, and why they do not carry over to the LGX Lite V2.
Also listed as LGX Lite
Short answer
Bondtech says the LGX supports 1.75 mm filament only. The original LGX Lite lists 562 E-steps at 16 microsteps and a Klipper gear_ratio example of 44:10, 37:17; Bondtech has replaced it with the LGX Lite V2, so do not carry those values over. Bondtech's LGX page gives no gear ratio.
Key facts
- Type
- Extruder with a custom NEMA17 25 mm pancake motor (LGX)[1]
- Filament size
- 1.75 mm only (LGX)[1]
- Gear ratio
- LGX: not stated. Original LGX Lite: Klipper gear_ratio example 44:10, 37:17[1][2]Do not carry LGX Lite values over to the LGX Lite V2.
- Published E-steps
- Original LGX Lite: 562 at 16 microsteps[2]Bondtech says the original LGX Lite was replaced by the LGX Lite V2. The page lists 48 g net weight (141 g with motor).
- Drive gears
- Not confirmed
- Max temperature
- Not confirmedThe temperature limit belongs to the hotend paired with the extruder.
- Nozzle standard
- Not confirmed
- Nozzle change
- Not confirmed
- Heater
- Not confirmed
- Printers the maker names
- Not confirmed
- Maker flow figure
- Not confirmed
- Outside measurement
- Not confirmedAnnex Engineering's LGX figures are a calculation from motor curves and estimated gear radii, not a measurement, so we do not use them to rank extruders.
- Where the maker sells
- Bondtech lists authorized resellers in the US and Canada and ships worldwide directly from Sweden[3]Bondtech's page names no Amazon or AliExpress store. Reseller lists change.
- Not confirmed
- Not confirmedBondtech's LGX page gives no gear ratio, and we did not read the V2 page.
Watch out for
- The LGX takes 1.75 mm filament only, per Bondtech.
- The 562 E-steps and 44:10, 37:17 gearing are for the original LGX Lite. Bondtech replaced it with the LGX Lite V2; do not copy the values across.
- The 293 g figure on Bondtech's LGX page is freight weight, not the extruder's own weight.
- Annex Engineering calls the BMG and LGX comparable in force, but its figures are calculated, not measured.
Questions
Does the Bondtech LGX take 2.85 mm filament?
No. Bondtech states that the LGX supports only 1.75 mm filament.[1]
What E-steps does the LGX Lite use?
Bondtech lists 562 E-steps at 16 microsteps for the original LGX Lite, which it has replaced with the LGX Lite V2. Those values do not carry over to the V2.[2]
Is the LGX stronger than the BMG?
We cite no measured head-to-head of the two. Annex Engineering calls them comparable in force, but its figures are calculated from motor torque curves and estimated gear radii, not measured, so we do not rank them by it.[4]