Creality K1 extruder upgrades compared

The Creality K1, K1C and K1 Max take three kinds of extruder upgrade: new gears or Creality’s own replacement extruder, the drop-in Phaetus DXC, and conversions that need root access. The conversions are Bondtech’s LGX Lite Pro kit and the printed Libra housing, which reuses Orbiter v2 parts.

What extruder upgrades fit the Creality K1?

Extruder upgrades that fit the Creality K1, K1C and K1 Max are Creality’s own replacement Extrusion Kit and gear kit, Fysetc metal gears, the Phaetus DXC, Bondtech’s LGX Lite Pro upgrade kits and the printed Libra housing for Orbiter v2 internals. The Bondtech and Libra options also need printer.cfg edits, which take root access.

The table is sorted by price. “Fits” is each maker’s or seller’s own list. Prices are US prices on November 4, 2026, before shipping.

Notes on the rows:

• Stock extruders. Creality’s own pages disagree on the K1C. Its comparison table lists a “Dual-gear direct drive extruder” for the K1 and K1 Max and an “All-metal direct drive extruder” for the K1C. Its parts lists give all three the same spares: the Extrusion Kit without motor and an Extrusion Mechanism Kit with motor, both PA6+20%GF (nylon 6 with 20% glass fiber). Creality’s US store describes its kit as “a high-quality plastic shell housing durable metal gears” with 50 N of extrusion force.
• Early K1 and K1 Max units. Some shipped with a separate hotend whose blue PTFE tube runs up through the extruder, per Creality’s wiki. Creality’s current Extrusion Kit is sold “Only for integrated hot-end”. The separate hotend has set screws on its heat sink; the integrated one has none. To change hotends first, see K1 hotend upgrades.
• Bondtech without the extruder. Owners who already have an LGX Lite Pro can buy the accessories set alone: $138.99 for the K1/K1C, $158.99 for the K1 Max at Filastruder. Bondtech says the kits are for a stock K1, K1C or K1 Max and will not work with other belt widths, custom gantries or altered belt paths.
• Multicolor. Creality’s K1 Series CFS Upgrade Accessory Kit also replaces the extruder, with one that adds a filament cutter. It fits only the integrated hotend.
• Micro Swiss. Its NG extruders are listed for Ender and CR-10 models, not the K1 series. Its K1 product is the FlowTech hotend, covered in K1 hotend upgrades. For the NG itself, see Micro Swiss NG extruder.

Which K1 extruder upgrades need root?

The Bondtech kits and the Libra need root. A new gear train needs a new rotation_distance in printer.cfg, and both makers’ guides say the file can be edited only after rooting.

Creality added a root account to the K1 and K1 Max in firmware V1.3.2.20. Its wiki says the K1C 2025 and K1 Max 2025 do not support root, so those two can take only the no-config options above. Bondtech’s quick start guide points to Guilouz’s Creality Helper Script for rooting.

Bondtech publishes two rotation distances for these kits: 4.0 in its setup guide and data sheet, 3.99 in its quick start guide. The 0.6 A current is from the quick start guide and sits inside the data sheet’s recommended 550 to 650 mA. Bondtech’s settings, against Creality’s stock values:

[extruder]
rotation_distance: 4.0      # stock 6.9; Bondtech's quick start guide prints 3.99

[tmc2209 extruder]
run_current: 0.6            # stock 0.55

The gap between 4.0 and 3.99 is about 0.25 mm per 100 mm of filament. A 100 mm extrude test, as described in Klipper’s rotation distance guide, sets your final value from either one.

Why do Creality K1 owners upgrade the extruder?

Owners upgrade when the stock gears wear, or to get gears rated for abrasive or flexible filament. Creality’s K1 troubleshooting covers gears that idle or clang and says to replace the extrusion kit if a gear is damaged or deformed. Its warranty treats the extrusion gear as a consumable with no warranty period.

What the sources say:

• Wear and warranty. Creality’s warranty lists the extruder kit, excluding the gear, as a wear part with a 3-month limited warranty. Past that, fixing a worn extruder costs $3.89 for the gear kit, $20.34 for the Extrusion Kit, or the price of an upgrade.
• A revised extruder. Creality says the K1C’s extruder adds “a bolster spring and a ball plunger” so the grip on the filament “won’t slacken off”. Its wiki shows the older extruder holding the PTFE tube with a blue clip and the newer one with a white pneumatic connector. Clever Creations compared the K1C’s extruder with a revised K1 extruder and found the main difference was the K1C’s beefier pneumatic tube coupling.
• Gear material. Tom’s Hardware lists an all-metal extruder among the K1C’s improvements and says it “handled TPU without any problems at all”. Clever Creations found plastic gears in its review K1C and expects them to “wear out much quicker than metal ones would”. With reviewers and Creality’s own pages split, look at the gears in your own K1C before buying replacements.
• Abrasive filaments. Fysetc’s DLC gears are sold “for Abrasive filament”. Phaetus rates the DXC’s coated gears for carbon-fiber and glass-fiber blends, and Bondtech lists the LGX Lite Pro kit for abrasive filaments.
• Flexible filaments. The LGX Lite Pro has five tension positions, with position 4 for filament softer than 85A (Shore hardness). Phaetus lists TPU from about 85A to 95A for the DXC.

If extrusion stops mid-print, Creality’s own checks come first: filament tangles, a blocked PTFE tube or a clogged hotend cause the same symptoms as a worn gear.

Does an extruder upgrade void the K1 warranty?

It can. Creality’s warranty requires “no unauthorized disassembly, no modifications or additions not guided by the official manual”. Its root disclaimer says a rooted device “may lose the official warranty service”. Creality publishes its own extruder replacement steps, so its spare kit is the option with official instructions. BrynD says fitting the Libra “will invalidate any warranty you have on the K1 printer”. See does upgrading void the warranty.

Do the K1C and K1 Max take the same extruder upgrades?

Mostly yes. Creality lists the same Extrusion Kit for the K1, K1C and K1 Max, and the Phaetus DXC and Libra fit all three. Bondtech sells a separate K1 Max kit with longer X rods. The K1C 2025 and K1 Max 2025 cannot be rooted, which leaves them the Creality kits, the Fysetc gears and the DXC.

What differs by model:

• K1C. It shipped with the revised extruder and Creality’s integrated Unicorn nozzle, so Creality’s integrated-hotend-only Extrusion Kit fits it. Its stock Y travel differs from the K1’s (position_max: 227 against 226), so check Y limits after a Libra conversion.
• K1 Max. Bondtech’s K1 Max kit, with 382 mm X rods, costs $269.00 against $249.00 for the K1/K1C kit. Early units may have the separate hotend, which Creality’s current Extrusion Kit does not fit.

Can you fit an Orbiter extruder to a K1?

Yes, through BrynD’s free Libra housing. Its parts, motor included, come from a donor LDO Orbiter v2.0 or v2.5 or a Cyclops. It fits the K1, K1C and K1 Max. You have to cut material from the toolhead, root the printer and edit printer.cfg, and BrynD says fitting it voids the K1’s warranty.

The Libra keeps the Orbiter’s drive gears and gearbox in a printed housing. BrynD’s install guide offers outlets for a 4 mm PTFE tube or the 3 mm Unicorn nozzle tube, so it covers both hotend generations. A sister model, Trigger, adds a filament sensor.

The guide lists every part you need, including a sanding drum or rotary tool, heat-set inserts, an extra SMR128ZZ bearing and a rewired motor plug. A donor Orbiter v2.5 cost $59.99 at Filastruder on November 4, 2026; the Orbiter extruder guide covers the v2.0 and v2.5.

The guide’s printer.cfg changes, against Creality’s stock K1 values:

[extruder]
dir_pin: !nozzle_mcu:PB0    # stock nozzle_mcu:PB0; the "!" reverses the motor
rotation_distance: 4.637    # stock 6.9

[tmc2209 extruder]
run_current: 0.65           # stock 0.55

[stepper_y]
position_max: 216           # stock 226; K1 Max: 296 (stock 306)

The Orbiter’s motor is 8 mm larger, so the guide cuts Y travel and sets the slicer bed to 220 × 215 mm on a K1 and 300 × 295 mm on a K1 Max. It also moves the nozzle-wipe position and takes 5 mm off the bed mesh’s Y value. The guide gives no K1C figure; on the K1 and K1 Max it sets Y 10 mm below stock.

The 4.637 rotation distance is LDO’s published value. The Orbiter’s designer publishes 4.69, and either one gets calibrated with the 100 mm test in Orbiter Klipper config.

Two run currents are published for the same donor motor. BrynD’s Libra guide sets run_current: 0.65 for the Orbiter motor once it sits in the Libra. LDO and the Orbiter’s designer publish 0.85 A RMS (root mean square) for the Orbiter v2.0 and v2.5 in general, and the same Klipper config page explains what a lower current trades away. The 0.6 in the Bondtech settings applies only to the LGX Lite Pro, and 0.55 is Creality’s stock setting for its own motor.

For other extruder swaps, see the extruder upgrades hub.