Best filament for gears: nylon, PETG, or PLA+

The short answerNylon wears best. PETG is the tough all-rounder. PLA+ is the budget pick.

For 3D-printed gears, the material decides how long the gear lasts. Nylon wins on wear and friction. PETG is the tough, printable middle. PLA+ works for light, low-load gears on a budget.

What a gear asks of a filament

A gear transfers force across teeth that slide and press against each other. The filament needs low friction, good wear resistance, and enough toughness to take a repeated load. Rigidity helps the teeth hold their shape. A gear that strips or wears smooth has failed, even when the print looks perfect.

How the materials compare

Why nylon leads for wearing gears

Nylon slides against itself and other materials with little friction, so the teeth wear slowly. The Polymaker PolyMide CoPA datasheet rates its heat resistance to 180 °C. The trade is printing difficulty. Nylon is highly hygroscopic, so it must stay dry, and it abrades brass nozzles. Use a hardened steel nozzle for nylon.

PETG and PLA+ for the rest

PETG is the practical pick when nylon is too much trouble. It is tough, prints without an enclosure, and holds up to moderate wear. PLA+ is the budget choice for light gears. The eSUN PLA+ datasheet rates its impact strength above standard PLA, so the teeth survive longer, but PLA+ still wears faster than PETG or nylon.

For more on each material, read the PETG guide, the PLA+ guide, or the PETG versus nylon comparison. For the strongest filament overall, see which filament is strongest.