DIY jewelry polisher – Polishing 3D print

Do you want to polish your 3D prints without buying an 80€ polisher

Here's a DIY version, printable at home, with only a few components to buy 👇

This model works perfectly but can be optimized, both structurally and electrically, feel free to comment, and if there are enough downloads, a Bambu supply compatible model will be released

👉 Jewelry polisher suitable for PLA / PETG / resin

👉 Works with 2 5V motors

👉 Easy to assemble

👉 Low budget

🔧 Required components (in addition to 3D printing, links at the end) :

• 2x motors → 0.91€
• Power adapter 5V 2A → 2.03€
• Speed controller → 7.99€
• Switch → 2.85€
• 4x 608zz bearings → 2.48€
• 8x M5x16 screws
• 6x 32mm inner diameter seals (see photo) present to aid drive, can be replaced by TPU print, or even elastic
• 8x 8x2mm magnets
• 4x m3 screws (28mm) (may be supplied with motors)
• 4x m3 nuts (may be supplied with motors)

💰 Total cost ≈ 15€ (instead of 80€ 💸)

⚙️ How it works :

Fix the motors side by side → roller → place the print and polishing pellets in the cylinder

It also works for : jewelry, resin, PLA prints, small decorative pieces, miniatures, etc

Assembly photos

Required hardware elements :

Insert the m3 nuts into the block provided for the motors :

Insert the bearings into the slots above the M3 nuts

then attach the side axles to this part using M5x16 screws

Electrical assembly photo

Screw the plate to which the switch and speed controller are attached to the part containing the motors using 4 M5x16 screws

Place the O-rings on the rollers :

Insert the rollers onto the motors

Insert the two remaining bearings into the designated slots :

then screw this part to the rest using two M5x16 screws

The magnets must be fixed in these locations using glue :

Links (amazon/aliexpress) :

2 motors 0.91€ : here

Power adapter 5V 2A 2.03€ : here

Speed controller 7.99€ : here

Switch 2.85€ : here

4x 608zz ball bearings 2.48€ : here

Polishing pellets : here