Why Material Matters
The material you print with determines how your part looks, feels, and performs. Picking the right filament can mean the difference between a part that lasts years and one that cracks on day one.
Here's a breakdown of the most common options.
PLA — The All-Rounder
Best for: Prototypes, display models, low-stress parts
| Property | Rating |
|---|---|
| Strength | ★★★☆☆ |
| Heat resistance | ★★☆☆☆ |
| Ease of printing | ★★★★★ |
| Cost | ★★★★★ |
PLA is the go-to for most prints. It's easy to print, affordable, and produces great surface finish. The main limitation is heat — it softens above ~55°C, so it's not ideal for parts that sit in the sun or near heat sources.
PETG — The Tough Choice
Best for: Functional parts, outdoor use, anything needing some flex
| Property | Rating |
|---|---|
| Strength | ★★★★☆ |
| Heat resistance | ★★★☆☆ |
| Ease of printing | ★★★★☆ |
| Cost | ★★★★☆ |
PETG is stronger and more temperature-resistant than PLA. It has a slight flexibility that makes it more impact-resistant. Great for functional parts, enclosures, and anything that might take a knock.
ABS — The Classic
Best for: Heat-resistant parts, automotive applications
| Property | Rating |
|---|---|
| Strength | ★★★★☆ |
| Heat resistance | ★★★★☆ |
| Ease of printing | ★★★☆☆ |
| Cost | ★★★★☆ |
ABS has been used in manufacturing for decades (LEGO bricks are ABS). It handles heat well and can be acetone-smoothed for a glossy finish. Requires an enclosed printer due to warping and fumes.
Nylon (PA) — The Heavy Duty
Best for: Gears, hinges, high-stress mechanical parts
| Property | Rating |
|---|---|
| Strength | ★★★★★ |
| Heat resistance | ★★★★☆ |
| Ease of printing | ★★☆☆☆ |
| Cost | ★★★☆☆ |
Nylon is the strongest common FDM material. It's ideal for functional parts that need to withstand repeated stress — gears, clips, hinges, and bearings. It does absorb moisture, so proper storage is important.
TPU — The Flexible One
Best for: Gaskets, grips, phone cases, vibration dampeners
TPU is a flexible, rubber-like material. It's great for parts that need to bend, compress, or absorb impact. Trickier to print but the results are worth it.
Not Sure? Just Ask
If you're not sure which material is right for your project, send me a message with the details and I'll recommend the best option. No charge for advice.