Can It Be 3D Printed? A Quick Guide

Here at Widget KC, we believe in solving problems creatively which means often firing up the 3D printer.

We use a specific type of printer called an FDM (Fused Deposition Modeling) printer. In plain terms, it heats up plastic (or rubber-like filament), and lays it down one thin layer at a time until you have a solid, functional object.

But how do you know if something should be 3D printed?

I always tell people to start with two simple questions:

1. Can it be made out of plastic?

2. Is it small enough to fit in the printer?

If the answer to both is yes, you’re already halfway to a solution.

But before you hit "print," there are a few more things to consider. Here’s a quick breakdown of when 3D printing is a smart move and when it might not be your best option.

When 3D Printing Is a Good Idea

• The part can be made from plastic or flexible filament. Most hobbyist printers use PLA, PETG, or TPU which are great for light-duty parts or prototypes.

• You need a replacement and can’t find it anywhere. That broken clip, button, or bracket? It might be easier to recreate than to hunt down. It takes me 20 minutes to drive to the hardware store and back and I can model simple parts in less than that time.

• The original part is overpriced. Why buy a $40 plastic mount when you can make one for under a dollar?

• You want to stand out. Custom objects like keychains, phone stands, or even sunglasses are great conversation starters.

• You want to personalize. Add names, logos, or design features to make something one-of-a-kind.

• You’re into eco-friendlier options. Many filaments like PLA are plant-based and biodegradable under the right conditions.

When 3D Printing Isn’t the Best Choice

• You need extreme strength or durability. While there are stronger materials available, most basic filaments aren't great for heavy loads or constant stress.

• The part is exposed to high heat. PLA will warp in a hot car. If it’s going near an engine or stove, 3D printing may not cut it.

• It needs to be airtight or watertight. Standard prints can leak unless treated, which isn’t ideal for hazardous materials.

• Time matters. Printing takes hours (sometimes days). If you need a fix now, this might not be the fastest option.

Final Thoughts

3D printing isn’t just about fixing things, it’s about creative problem-solving. It's woodworking for the digital age. And like any good workshop, you don’t need to rely on just one tool or material. Combining 3D prints with metal, wood, or acrylic can open up even more possibilities. Just because you can print it doesn't mean you should.

So next time something breaks or you get a bright idea, ask yourself those two questions:: Can it be made of plastic? Will it fit in the printer?

If yes—get designing, get building, and don’t be afraid to mix and match materials along the way.

3D Printer Timelapse Printing a Pair of Sunglasses