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Nylon (PA) settings for the Prusa MK4

⚠ Possible with tweaks Advanced Engineering

These are hardware-tuned starting settings for printing Nylon (PA) on the Prusa MK4. The Prusa MK4 pairs a direct-drive extruder with an all-metal hotend on an open frame, and tops out at 290°C hotend / 120°C bed. Against Nylon (PA)'s ideal range (240–280°C), that lands us at 260°C nozzle and 90°C bed. Nylon is extremely strong but soaks up moisture fast, so dry the spool before every print.

Quick answer: 260°C nozzle · 90°C bed · 56 mm/s · 1.5 mm retraction · 0% part fan. Change one setting at a time and validate with a small calibration model.
260°
Hotend
90°
Bed
56
mm/s
0%
Part fan

Recommended Nylon (PA) profile

Hotend temperature260°C (tower 240–280°C)
Bed temperature90°C
Print speed56 mm/s
Retraction1.5 mm (direct drive)
Part cooling fan0%
Bed adhesionGlue stick or PA-specific sheet; dry before printing.
NozzleBrass 0.4 mm is fine
First layer speed20–28 mm/s; same bed temp, verify Z offset
Flow / extrusion multiplierStart at 100%; calibrate flow before touching retraction
DryingStrongly recommended — dry before printing if you hear popping or see inconsistent extrusion
⚠️ Nylon (PA) warps without an enclosure and the Prusa MK4 is open-frame. Block drafts, raise the bed temp, add a brim, and consider a simple enclosure for tall parts.
💡 Best uses for Nylon (PA): gears, living hinges, tough parts. Estimate the material cost of your next Nylon (PA) print with the filament cost calculator.

How Nylon (PA) behaves

StrengthFlexibilityHeatEaseDurabilityDetail

Nylon (PA) property profile

Strength 85
Flexibility 60
Heat resistance 70
Ease of printing 30
Durability 95

Calibration order

  1. Dry the spool if it shows moisture symptoms, then confirm the nozzle and build plate are clean.
  2. Print a temperature tower inside the 240–280°C range; pick the lowest temperature with strong layer bonding and clean overhangs.
  3. Calibrate flow, then pressure/linear advance if your firmware supports it.
  4. Tune retraction last — more distance is not always better, especially on the direct-drive Prusa MK4.

Nylon (PA) brands & what to expect

Nylon (PA) is the most moisture-sensitive common filament, and grades differ hugely — PA6, PA12, glass- and carbon-filled all print differently. What they share: they must be bone-dry, or they hiss, foam and print rough.

🔎 Nylon can pull enough water out of the air to ruin a print in a couple of hours on a humid day. Print straight from a dryer, not just "dry it once" — many people run nylon out of an active dry box.

Popular Nylon (PA) brands: Polymaker.

Common Nylon (PA) problems on the Prusa MK4

SymptomLikely causeFix
Popping, steam, rough surfaceWet filament (almost always)Dry 6–12 h and print from a heated dry box.
Poor bed adhesionNylon resists stickingUse a PA-specific sheet or glue stick; enclose to hold heat.
WarpingHigh shrinkage + open frameEnclosure, brim, minimal cooling.

On the Prusa MK4 specifically: it is open-frame, so the warping fixes above are the ones that matter most — an enclosure or draft shield does more for Nylon (PA) here than any slicer tweak.

Nylon (PA) troubleshootingSymptoms, likely causes and a safe test orderCompare Nylon (PA) across printersMaterial ranges and every per-printer profile

FAQ

What temperature should I print Nylon (PA) on the Prusa MK4?
Start at 260°C for the hotend and 90°C for the bed, then run a temperature tower across 240–270°C to dial in your exact filament brand. Our temperature tower planner builds the tower for you.
What print speed works for Nylon (PA) on the Prusa MK4?
Around 56 mm/s is a safe starting point. This printer can go faster once the profile is tuned, but start conservative for clean walls. Check your real speed ceiling with the max volumetric flow calculator.
What retraction should I use for Nylon (PA)?
Use about 1.5 mm of retraction (direct drive needs very little). If you see stringing with Nylon (PA), raise retraction speed before distance and dry the filament first.
Do I need an enclosure for Nylon (PA) on the Prusa MK4?
Yes — Nylon (PA) really wants an enclosure and the Prusa MK4 is open, so expect warping on large parts without one.
Do I need a hardened nozzle for Nylon (PA)?
No. Nylon (PA) is not abrasive, so the stock brass 0.4 mm nozzle on the Prusa MK4 is fine.

Reviewed 2026-08-18. See how these starting settings are calculated. Numbers are conservative starting points, not lab measurements.