Printer Filament Guide

Best Filament for the Creality K1

The original 600mm/s enclosed CoreXY that put Creality in the speed race, though its brass nozzle limits it to non-abrasive filament out of the box.

Last updated: June 2026

The K1 was Creality's first enclosed CoreXY and it still earns its keep as a fast workhorse. The 220×220×250mm chamber, ceramic-heated direct-drive hotend, and full panels make it a genuinely capable ABS/ASA box. The enclosure is passive though, with no chamber heater, so on large ABS prints you're relying on trapped hotend and bed heat rather than a regulated chamber. For PLA and PETG it just rips at speed.

What the Creality K1 prints well

Recommended materials for this printer:

PLA PLA+ PETG TPU ABS ASA PC Nylon

Fit a hardened nozzle before any carbon- or glass-fibre filament, since the stock nozzle isn't abrasive-rated. Everything non-abrasive prints out of the box.

Cheapest filament for the Creality K1 right now
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On filament, the constraint is the stock 0.4mm brass nozzle. It's fine for PLA, PETG, ABS, ASA, and TPU, but it will wear out fast on anything carbon- or glass-filled. If you want PLA-CF, PA-CF, or any abrasive, budget for a hardened-steel nozzle before you run that spool, otherwise you'll round out the orifice within a roll or two. The bed maxes around 120°C, which covers everything this hotend can melt.

Creality K1 specs that affect filament

Build volume
220 × 220 × 250 mm
Enclosure
Enclosed
Heated chamber
No
Extruder
Direct drive
Max hotend temp
300°C
Stock nozzle
0.4mm brass (hardened-steel upgrade sold separately; needed for abrasives)
Abrasive-ready (CF/GF)
Needs hardened nozzle
Multi-material
Single colour

Buy a used or discounted K1 if you mostly print PLA, PETG, and the occasional ABS part and want CoreXY speed affordably. If carbon fiber is a regular part of your plan, skip straight to the K1C, which ships with the abrasive-ready nozzle and saves you the upgrade.

Filament notes for the Creality K1

  • PLA and PETG are the sweet spot. The enclosure isn't required, so crack a panel to avoid heat-creep softening on long PLA jobs.
  • ABS and ASA print well thanks to the full enclosure trapping heat. Run bed at 100-110°C and a wide brim, but expect more warping on tall corners than an actively heated chamber gives you.
  • TPU runs on the direct-drive extruder. Keep speeds modest (around 30-60mm/s) since the high-flow tuning is built for rigid filament.
  • Carbon-fiber and glass-filled filaments (PLA-CF, PA-CF, PET-CF) require a hardened-steel nozzle first, because the stock brass tip wears out within a roll on abrasives.
  • Nylon and PA need drying and benefit from the enclosure, but the passive chamber limits success on big or warp-prone nylon parts.
  • Skip multi-color plans here, since the K1 predates the CFS unit and has no AMS-style system.
  • Dry hygroscopic filament (PETG, TPU, nylon, any CF blend) before printing, because the K1 has no built-in dryer.
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Frequently Asked Questions

Can the Creality K1 print carbon fiber filament?
Only after a nozzle swap. The K1's 300°C hotend can hit the temps for PLA-CF and PA-CF, but the stock brass nozzle wears out fast on abrasive particles. Fit a hardened-steel nozzle first, then carbon-filled filament is fair game.
Does the Creality K1 have a heated chamber?
No. The K1 is fully enclosed, which traps hotend and bed heat and helps with ABS and ASA, but there's no active chamber heater. Big ABS prints can still warp at the corners compared with an actively heated machine like the K2 Plus.
What filaments work best on the Creality K1?
PLA and PETG are the easiest and fastest. ABS and ASA work well because of the enclosure. TPU runs on the direct-drive extruder at lower speeds. Carbon-filled filaments need the hardened-nozzle upgrade first.
Does the Creality K1 support multi-color printing?
No. The K1 predates Creality's CFS multi-material unit and has no AMS-style system. If you want multi-color, look at a K2 Plus Combo with the CFS.

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