PETG · Replacement Parts
PETG for Replacement Parts in Singapore
PETG is our default recommendation for most replacement parts because it covers the middle ground PLA can't: it flexes slightly instead of snapping outright, resists moisture and household chemicals, and handles noticeably more heat, at around 80°C, than PLA's 60°C ceiling. That combination suits the majority of appliance knobs, brackets and clips people come to us to replace — parts that get handled daily and occasionally knocked, but don't sit in extreme heat.
It's not the right choice for every replacement part, though. Anywhere the original lived outdoors or near real heat — a garden fitting, a car interior part left in the sun, anything close to an actual heat source — PETG's roughly 80°C limit and moderate UV resistance mean it will eventually degrade the way the original plastic might have. For those, we'd move you to ASA. And for a gear, hinge or anything that wears against another moving part, Nylon holds up longer than PETG does.
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Get a Quote in PETG →Why PETG for replacement parts
PETG strikes an excellent balance between strength, flexibility, and ease of printing. It offers superior layer adhesion and impact resistance compared to PLA, along with good chemical and moisture resistance. A versatile all-rounder for functional parts.
The functional all-rounder — stronger and more heat-tolerant than PLA, still easy to print.
Where PETG shines
- ▸Functional mechanical parts
- ▸Outdoor enclosures
- ▸Containers & brackets
- ▸Water-resistant housings
- ▸Snap-fit assemblies
Pros
- ✓ Strong layer adhesion
- ✓ Good impact resistance
- ✓ Chemical and moisture resistant
- ✓ Food-safe grades available
- ✓ Low warping compared to ABS
- ✓ Slight flexibility prevents snapping
Cons
- ✗ Stringing can be an issue
- ✗ Supports are harder to remove
- ✗ Surface finish slightly glossy
- ✗ Scratches more easily than PLA
- ✗ Requires higher temps than PLA
Key properties
From our workshop
Tips for PETG replacement parts
- ▸For a snap-fit clip or latch, PETG's slight flexibility is the whole reason to choose it over PLA — design the flexing arm a touch thinner than a rigid-plastic guide would suggest, so it actually bends rather than fighting the plastic's stiffness.
- ▸If the part needs to grip a screw or shaft, size the hole about 0.1–0.2 mm smaller than the target diameter — PETG's own layer adhesion holds threads well once they're cut or pressed in, but only if the starting hole isn't already oversized.
- ▸Expect a slight sheen on PETG's surface compared to the original injection-moulded part — it's cosmetic, not structural, but worth knowing if you're matching an exact look rather than just function.
- ▸Test-fit a critical dimension (a shaft bore, a snap groove) before committing to a full print — PETG's stringing can leave a fine web across a tight opening that needs clearing before the part seats properly.
Example parts we print
- ▸Appliance dial and control knobs
- ▸Cabinet hinge brackets and mounting plates
- ▸Snap-fit battery or panel covers
- ▸Spare clips and fasteners kept on file for reordering
Recommended settings
| Setting | What we use |
|---|---|
| Infill | 20–25% for a typical knob or bracket; push to 30%+ if the part takes a screw load or regular flexing |
| Perimeters | 3 walls around any snap-fit or threaded feature so it doesn't rely on infill alone |
| Orientation | Print snap-fit arms along the layer direction rather than across it, so the flex works with the print instead of against a layer line |
| Tolerance | Holes print roughly 0.1–0.2 mm smaller than modelled — worth allowing for on any part that has to fit a shaft or screw |
Starting points from our own machines — we tune per part before printing.
Frequently asked questions
Is PETG a good match for a part that used to be injection-moulded plastic?
For most everyday parts, yes — PETG's toughness and moisture resistance are close to what an injection-moulded ABS or polypropylene part would offer, without PLA's brittleness. It won't match an injection-moulded part's surface finish exactly, but functionally it holds up well for knobs, brackets and clips.
How much should I allow for PETG's flex when modelling a tight snap-fit?
PETG's slight flexibility is usually a benefit for a snap-fit — it lets a clip flex open and closed thousands of times without cracking, unlike a fully rigid material. The trade-off is that a very tight snap groove can feel harder to release than the same design in a stiffer plastic, so we'd rather print with a touch of extra clearance than a groove that's impossible to unclip.
Keep exploring
Replacement Parts
Everything we print for replacement parts, across every material.
PETG
Full PETG guide — properties, pricing and what it is good at.
Other materials for replacement parts
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