3D Printed Replacement Parts for Broken Plastic Items

3D printed replacement parts can bring a broken plastic item back to life when the manufacturer no longer sells the part, or sells it only as part of an expensive assembly. A maker can copy or redesign the part from the broken original, your measurements and photos, then print it in a suitable material. Small one-off parts often cost roughly £10 to £40 and take a few days, though it depends on size, material and how much design work is involved.

Good candidates for 3D printed replacements

Replacement parts 3D printing works best on small, simple plastic pieces that do not carry heavy loads. Common examples include:

• Knobs, dials and buttons
• Clips, catches and latches
• Battery covers and compartment doors
• Brackets and mounting plates for shelves, cabinets or equipment
• Drawer runners, feet and spacers
• Hobby, toy and model parts
• Appliance trim, handles and small internal pieces
• Discontinued parts for older products

A custom 3D printing service is especially useful when the original is no longer made. Even a one off 3D printing service can often produce a usable replacement from a good set of measurements.

Check these before you commit

Some jobs need extra thought. Tell the maker what the part does, then ask for their honest view on whether printing suits it.

• Load-bearing or safety-critical parts. Anything that holds weight, supports a person, or could cause injury if it failed (child seats, climbing or lifting gear, brakes, ladders) is a job for the original manufacturer or a qualified professional.
• Gas and electrical safety. Parts for gas appliances, mains electrics, heaters and anything near a heating element should come from the manufacturer or an approved supplier.
• High heat. Standard PLA softens at fairly low temperatures, for example in a hot car or near an oven. Heat-resistant materials exist, but the right choice depends on the actual temperature, so share it with the maker.
• Food contact. Printed surfaces have tiny gaps where bacteria can sit, and not every material or colourant is food safe. Ask the maker about food-safe options and how the part will be cleaned. Many makers will not recommend printing for direct food contact.
• Outdoor use. Sun, rain and frost affect some plastics more than others, so say where the part will live.

How to measure and photograph the broken part

Good information saves time and money.

1. Keep every piece. Even tiny fragments help the maker understand the shape.
2. Measure the key dimensions. Use a ruler or, ideally, digital callipers to record length, width, thickness, hole sizes and the distance between holes. Write them down in millimetres.
3. Note what it connects to. Measure the part it fits into or slides over, as well as the broken piece itself.
4. Take clear photos. Shoot from the top, bottom and sides on a plain background, with a coin or ruler beside the part for scale.
5. Photograph it in place. A picture of where the part sits on the product shows how it fits.
6. Add the product details. Brand, model number and a link or description of the item help the maker check what is possible.

You can upload up to 4 photos or sketches with a Hire a Maker request, so choose the clearest ones.

Sending the original part

If the broken part is small, posting it to a maker is often the most accurate route. The maker can measure it directly, test the fit and match tricky curves. Pack it in a small padded envelope or box and agree the return of the original with the maker beforehand. A local maker can measure it in person, which is handy for awkward shapes. Our guide to a 3D printing service near me covers when that helps.

Which material is right for your part?

• PLA. Easy to print, inexpensive, and good for indoor decorative or light-duty parts. It can soften in heat and is fairly brittle.
• PETG. Tougher and a little flexible, with better heat and moisture resistance than PLA. A popular all-rounder for practical parts.
• ABS and ASA. Stronger under heat. ASA also copes well with sunlight, so it suits outdoor parts. Both need more skill to print well.
• Nylon. Tough and slightly flexible, suited to gears, hinges and parts that rub together.
• Resin. Gives very fine detail and a smooth finish. Standard resins can be brittle, though tougher types exist.

The best material depends on the job, so tell the maker what the part does and ask for their recommendation.

Rough costs and timings

As a rough guide, a small clip or knob in a standard material often costs £10 to £25, and a medium bracket or cover £15 to £40. That is a little more than a simple printed item of the same size, because replacement parts usually involve measuring, adjusting and sometimes a test fit. If the maker has to model the part from scratch, design time adds to that, often priced per hour or as a fixed fee. Makers set their own prices, and postage is usually extra. For more detail, see our guide on how much 3D printing costs.

Printing itself can take from under an hour to a day or more. Allow a few days for most jobs, plus delivery, and longer if the part needs several test fits.

Questions people ask

Can a maker copy my broken part exactly?

Often yes, if the part is mostly intact or you have the measurements. A maker may need to rebuild missing sections from photos and the part it connects to.

Will a printed part be as strong as the original?

It depends on the material, design and print settings. Printed parts are often strong enough for light-duty use. Ask the maker how they will make yours suitably sturdy.

What if the original part is lost entirely?

Share measurements of the space it fits, photos of the product and a picture of a working example if you can find one. The maker can work out a suitable shape.

Can I use a design I found online?

If you have a file, send it. Check that the licence allows printing it. Makers need permission to reproduce someone else's branded or protected designs.

Ready to get your item fixed? Post a free request with your photos and measurements, and makers who do 3D printing can reply with ideas, prices and timings.