When should you use gyroid infill?
Gyroid is the wavy, almost organic-looking infill everyone in the 3D printing community seems to love. It earns some of that. Under a crush load it fails in one spot, right under the load, instead of cracking across the whole part. That’s the reason to pick gyroid infill, and it’s a narrower reason than its fan club suggests.
Applies to
- Process
- FDM / filament
- Good for
- Crush or impact loads, parts that should fail gradually
- Also
- Interiors that need to stay open (air or liquid can pass)
- Default instead
- Grid or triangles for everyday parts
Why it matters
In Slant 3D’s crush test, gyroid crushed near the top, where the press was, and didn’t spread anywhere strange.
Their explanation: force can’t travel along a diagonal through a gyroid the way it does through grid or hexagonal. Only the area taking the most force gets crushed. You get a puncture, not a split.
That’s great for parts that take knocks. A dented bracket still holds. A bracket with a crack running corner to corner doesn’t.
What good looks like
- Gyroid is chosen for a reason (impact, local loads, open interior)
- Density stays in the normal range; gyroid isn’t an excuse to skip walls
- A test part dents locally under load instead of cracking across
How to apply it
- Decide whether the part will see crushing or impact loads, or needs an open interior.
- If yes, set the infill pattern to gyroid at your usual density (Slant 3D tested 25%).
- Keep your wall count. Gyroid braces the walls; it doesn’t replace them.
- Print one and press on it where it’ll get hit. It should dent there and stay intact elsewhere.
Test it on your setup
- Print a 20 mm cube in gyroid and one in grid at 25%. Press a bolt head into the top of each in a vise. The gyroid cube should crater under the bolt; the grid cube is more likely to crack along a diagonal.
Exceptions & tradeoffs
Mind you, Slant 3D still calls grid and triangles the most reliable choice in most situations. Gyroid isn’t an upgrade for every part, just a different way to fail.
If you want the inside sealed into separate pockets, gyroid is the wrong pick. It’s an open, connected structure. Cubic is the closed-pocket option.
Common mistakes
- Switching everything to gyroid because a forum said it’s the strongestUse it where a local, gradual failure matters; leave grid or triangles elsewhere
- Dropping walls because gyroid ‘is strong enough’Keep your perimeters; the skin still carries the load
Frequently asked questions
- Is gyroid infill stronger?It’s known as a strong infill, but its real advantage is how it fails. In Slant 3D’s test it crushed only where the load was, with no crack running across the part.
- Gyroid vs grid infill: which should I use?Grid for everyday parts; it’s reliable and Slant 3D rates it among the best defaults. Gyroid when the part takes crushing or impact loads and should dent instead of crack.
- Gyroid vs cubic infill?Both crushed predictably in the test. Cubic has closed internal pockets, so nothing flows through it. Gyroid is open and connected.
- What infill percentage should I use for gyroid?The same as any other pattern. Slant 3D ran it at 25%, and 10–25% covers most parts.
Gyroid: popular, reliable and strong; crushes locally because force isn’t transferred along a diagonal — Learn How Infill Patterns Behave Under Stress | 3D Printing Experiment ↗ at 04:38.
Cubic has closed internal pockets with no airflow between them — Learn How Infill Patterns Behave Under Stress | 3D Printing Experiment ↗ at 02:57.
Grid or triangles generally best and most reliable — Learn How Infill Patterns Behave Under Stress | 3D Printing Experiment ↗ at 05:42.
Gyroid’s crush behaviour and the reason for it are Slant 3D’s, from the last pattern in their test. The bolt-head test and the use cases are how I’d apply it.