OpenSCAD models for lapidary lapping disc storage trays — stackable, lightweighted, PETG
- OpenSCAD 100%
pinchycat
3e6bd15d7e
- Circular tray for 230mm x 20mm lapping discs (1kg each) - 6-peg interlocking stacking system with 0.3mm PETG tolerance - Elliptical front finger cutout for disc access - Hex hole lightening pattern on floor - 8x arched side window cutouts - Parametric: all dims at top - PETG print settings in comments and README - Designed for 15-disc stacks (~15kg load) |
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|---|---|---|
| lapidary_tray.scad | ||
| README.md | ||
lapidary-tray
OpenSCAD parametric storage trays for lapidary lapping discs.
What this is
Stackable circular trays designed to hold 230mm diameter × 20mm thick lapping discs (approx 1 kg each). Trays interlock via a 6-peg stacking system and are lightweighted with a hex hole floor pattern and arched side windows. A front elliptical cutout gives finger access to grab discs without lifting the whole stack.
Designed for PETG, sized for stacks of 15 discs (≈15 kg per stack).
Files
| File | Description |
|---|---|
lapidary_tray.scad |
Parametric tray model |
Key parameters
disc_diameter = 230; // lapping disc outer diameter (mm)
disc_height = 20; // disc thickness (mm)
disc_clearance = 2; // radial gap around disc each side
finger_clearance = 22; // vertical space above disc for finger grab
wall_thickness = 3.5; // tray wall thickness
floor_thickness = 3.0; // floor thickness
tab_height = 8; // stacking peg height
tab_clearance = 0.3; // radial clearance for tab fit (adjust for your printer)
tab_count = 6; // pegs/sockets around the rim
hex_size = 14; // hex hole circumradius on floor
arch_count = 8; // arched side windows
Print settings (PETG)
| Setting | Value |
|---|---|
| Layer height | 0.25 mm |
| Perimeters | 4 (min) |
| Infill | 35% gyroid or cubic |
| Supports | None required |
| Orientation | Flat on bed (bottom face down) |
Stacking
- Pegs on top of tray N insert into sockets on the bottom of tray N+1.
- 0.3 mm tab clearance gives a firm friction fit in PETG. Adjust to taste:
tab_clearance = 0.4— looser fit, easier separationtab_clearance = 0.2— near press-fit, permanent stack
Load considerations
15 discs × 1 kg = 15 kg per stack sitting on the bottom tray. Use 4+ perimeters and 35%+ infill. Gyroid infill distributes compressive load well.
Finger cutout orientation
The elliptical front cutout faces the Y- direction in the OpenSCAD render. Orient the tray so the cutout faces you when loading/unloading.