Rock-tumbler grit station — 3D-printable model preview

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Science & education Multi-part assembly

Rock-tumbler grit station

Keep the four rock-tumbling grits apart so polish never gets contaminated

A grit station for rock tumbling. The four stages (coarse, medium, fine and polish) each have a numbered bay with a full-height wall between them, and the lid keeps out dust. Mixing grits is the commonest reason a batch comes out scratched; here every stage stays separate, in order, beside the tumbler.

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Size: 200 × 90 × 60 mm
Shape: Rectangular
Walls: 2.4 mm
Volume: 211 cm³
Est. weight (PLA): 261 g
Parts to print: 2
Category: Science & education
Made by: Krypto
Built in: 58 steps

What’s in it

Rectangular, 200 × 90 × 60 mm, with 2.4 mm walls
3 dividers
Raised text: “1”, “2”, “3”, “4”, “COARSE”, “MEDIUM”, “FINE”, “POLISH”
Lift-off lid (prints separately)

How to print it

Keep a separate scoop in each bay; one stray coarse grain scratches a whole polish batch.

Prints as shown on its floor, no supports. The lid prints as a separate part, top down.

Filament: at most about 261 g of PLA printed solid (roughly $5.22 at $20 per kg); normal infill uses less.

To get the files, open it in the generator and choose File › Download STL (one file per part) or Download 3MF (every part on one plate).

Questions

What size is the rock-tumbler grit station model?

The rock-tumbler grit station model measures 200 × 90 × 60 mm (width × depth × height). You can change every size in the free SO3D.xyz generator before you download it.

Does it need supports?

No. Keep a separate scoop in each bay; one stray coarse grain scratches a whole polish batch. Prints as shown on its floor, no supports. The lid prints as a separate part, top down.

How much filament does it use?

At most about 261 g of PLA (211 cm³ printed solid), roughly $5.22 of filament at $20 per kg. Normal infill uses less.

How many parts does it print as?

2 parts. The download lays each part flat in its best print position: Download STL gives one file per part, Download 3MF puts them all on one plate.

Can I change it?

Yes. Open it in the SO3D.xyz generator (free, in your browser), change the size, walls, dividers, holes, text or anything else, then download it as STL or 3MF for your slicer.

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Make it fit your space

Change the size, walls, dividers, holes and labels of the rock-tumbler grit station model in your browser, then download it for your printer. Free, no CAD needed.

Customize this model