Stackable Lattice Basket — 4 sizes + parametric SCAD

A family of cross-stackable lattice baskets. Every basket has four

square corner posts that carry a cone peg on top and a matching

cone socket on the bottom. Stack any basket onto any other basket

— gravity + the 30°-from-vertical cone is the only "engine," and the

square ring of post bottom (≈ 410 mm² across the four corners) bears

the load. The cone is just for self-centring.

What's in the bundle

• stackable_basket.stl — the original 14×11.5×3 cm tray (open

•   short side, photographed in the listing).

• - stackable_basket_5x5x5cm.stl — 5×5×5 cm cube. Tiny parts bin,

•   earring/screw/SD-card-sized.

• - stackable_basket_10x10x5cm.stl — 10×10×5 cm square tray. Good

•   for cables, batteries, dice, charms.

• - stackable_basket_20x12x8cm.stl — 20×12×8 cm deep tray. Pencils,

•   remotes, USB hubs, bathroom bottles.

• - stackable_basket_leg.stl — optional cone-foot leg. Print four,

•   plug them into a basket's bottom sockets, and the basket sits on

•   short feet for a "raised platform" look. Same socket geometry as

•   the stack interface, so legs work with any size.

• - stackable_basket.scad — parametric source. Top of the file:

•   basket_l, basket_w, body_h, open_side, strut_pitch,

•   strut_w, etc. Cone-peg + corner-post dimensions are shared, so

•   every basket you derive STILL cross-stacks with the printed sizes.

Print

• Orientation: flat bottom on bed. Cone peg points up. No

•   supports needed — every overhang ≤ 30° from vertical (the cone

•   socket on the bottom narrows upward at ~0.12 mm/layer @ 0.2 mm

•   layer height, well inside FDM bridging tolerance).

• - Walls: 3 perimeters, 0.2 mm layer height, 15 % infill (the

•   lattice does the structural work). Bambu A1 / X1C / P1S all fine.

• - Material: PLA is great. PETG works. Translucent filaments make

•   the lattice look like a Czech crystal basket — recommend.

• - Bed size: 5/10/14 cm sizes fit any printer. The 20×12 cm long

•   variant needs a 220 mm bed (A1 / X1C / P1S OK; mini-printers no).

Design notes

• Lattice = 45° crosshatch struts, 2.5 mm thick, 10 mm pitch.

• - Wall thickness: 2.5 mm (lattice band + top rim).

• - Floor thickness: 2.5 mm.

• - Corner posts: 16×16 mm square × body height.

• - Cone peg: Ø14 → Ø7, 6 mm tall. Socket: Ø14.4 → Ø7.4, 6 mm deep

•   (0.4 mm radial clearance — slides on, doesn't bind).

• - Open side: the SCAD lets you choose which side has no lattice + no

•   rim open_side = "front" | "back" | "left" | "right"). All

•   shipped variants open on a SHORT side so the stack stays open in

•   the same direction at every level.

Customising

Open stackable_basket.scad, change the parameters at the top, hit

F6. Suggested overrides:

• Want a 30×10×5 cm long under-shelf tray? basket_l=300, basket_w=100, body_h=50.

• - Want a tighter lattice? strut_pitch=7.

• - Want the open side on the long edge? open_side="front".

The published STLs are produced exactly via that path — see

build.sh(parametric one-liner per variant).

Stacking math (in case you want to derive your own)

At the interface plane the corner-post bottom (16×16 mm minus the

Ø14.4 mm socket mouth, ≈ 102 mm² each × 4 ≈ 410 mm²) is what holds

the upper basket's weight. PLA crushes at ~70 MPa, so each tower of

3-4 baskets is rated for >> 28 kN — practical limit is what you fill

them with, not the plastic.

License

CC BY — fork it, scale it, share what you make. Source SCAD is in

the bundle.