Fully 3D Printed Paintbrush , Replaceable Bristles

more sizes will be available soon / if  demand is good :) 

After looking at normal paintbrushes and thinking, “surely a 3D printer could make one of these,” I ended up making this fully 3D printed working paintbrush.

The full brush can print in under 40 minutes, and the best part is that the bristles are replaceable. So if they get too worn, bent, clogged up, or abused during a project, you can just print a fresh set of bristles instead of binning the whole brush.

The bristle section is designed to be folded at the 43 mm point so it fits snugly into the brush head. Once fitted, the bristles stick out around 60 mm, but this is very customizable. You can cut them shorter, trim them into shape, or stiffen/soften the feel depending on what you want to use it for.

The full brush is around 150 mm long, with the red handle section being roughly 75 mm, making it a short, comfortable, quick-use brush rather than a big chunky tool.

This started as a fun “can this be done?” 3D printing idea, but it is actually useful. It could be used as:

• A quick emergency paintbrush
• A dusting brush
• A delicate cleaning brush
• A model-making brush
• A small archaeology/excavation-style brush
• A workshop brush for loose dust or debris
• Or whatever random use you find for it

check oit the pics for assembly help 

The idea is simple: imagine being somewhere with a 3D printer but no brush. A workshop, research facility, maker space, garage, classroom, campsite, or just your house at midnight when you suddenly need to paint something. Print this, fold the bristles, slot them in, and you have a working brush.

No AMS is needed. It can be printed as separate colour parts, or all in one colour if you just want the fastest functional version.

Print / Assembly Notes

Bristle fold point: 43 mm
Bristle length sticking out: around 60 mm
Full brush length: around 150 mm
Handle grip length: around 75 mm
Print time: under 40 minutes
AMS: not required

To assemble, fold the bristle part at the 43 mm point and fit it snugly into the brush head. You can then trim the bristles to whatever length or stiffness works best for your use.

P.S. When folding the bristle part, make sure you fold the shorter end first. One side is longer than the other, and if the longer side is folded the wrong way, it will not fit into the brush head properly.

The silver/metal-looking part has been made with general printer tolerances in mind, so depending on your printer, the fit onto the red handle may be slightly loose. A small dab of glue on the inside of the silver part may be needed to hold it securely to the red handle.

Once that part is fixed in place, the bristles are still removable and replaceable. Just pull the used bristle section out and fit a fresh one in.

You can also trim the bristles to suit your needs — shorter for a stiffer brush, longer for a softer/flickier action.