Parametric Leg Caps and Floor Protectors for Chair and Table Legs (Customizer: round, square, rectangular tube)

Caps for the ends of chair, stool and table legs, made to protect floors from bare tube ends and scratches. Enter your leg's size and pick a style:

Sleeve: a cup that slides over the outside of the leg end.

Plug: an insert for open tubes, with small crush ribs designed to hold it in the tube, and a chamfered tip so it starts easily.

Round, square and rectangular legs are covered, with an adjustable corner radius. For splayed legs, set the angle (0 to 20 degrees): the socket tilts and the pad stays flat on the floor. The pad can be larger than the leg (pad_extra), and an optional shallow recess on the bottom takes a stick-on felt or rubber pad, so the cap is designed to slide or to stay put depending on the pad you add.

Everything is set in the OpenSCAD Customizer, with inch sizes in the presets (7/8 in, 1 in, 3/4 in square and 1 x 2 in rectangular tube). Includes 5 ready-to-print versions.

Please read. This is a floor protector, not a structural part: it has no load rating and is not meant to level, raise or repair furniture. Check caps from time to time and replace any that crack or wear through to the leg.

NOTES AND LIMITS

- Not a structural part: it does not carry or hold the furniture together, and has no load rating.

- Fit depends on your printer and the exact leg size; measure with calipers and print one cap first.

- Plain plastic can still mark some floors when dragged; add a felt or rubber pad in the recess if that matters for your floor.

- Splay is set in one direction only (towards one side of the leg); mirror the part in your slicer for the opposite side if needed.

- Plugs are for open tubes whose wall thickness you know; set tube_wall to your tube's wall.

- Independently designed; not affiliated with or endorsed by any maker of the furniture, fixtures or hardware it is used with.

- Previews are computer renders of the included STL files, not photos of real prints. Each image is labelled "Rendered preview".

PRINT SETTINGS

- Material: PETG (as designed) or PLA. TPU 95A can be tried for a softer cap if your printer handles flexible filament (not tested yet; the plug ribs may then need rib_interference raised).

- Layer height 0.2 mm; 4 perimeters/walls; 30-50% infill (the parts are small)

- Supports: none. The felt-recess version has one flat bridge over the recess (about 24 mm across on the 3/4 in preset); most printers bridge this cleanly, otherwise set felt_depth to 0.

- Orientation: as exported (pad on the bed, socket or plug pointing up)

- Bed size: every preset is under 60 x 60 mm, so it fits any common bed

- Print one cap first and try it on your leg; adjust clearance (sleeve) or rib_interference (plug) in 0.05-0.1 mm steps if it is loose or tight.

HOW TO CUSTOMIZE: install the free OpenSCAD (openscad.org), open the .scad, choose Window > Customizer, change the values, then press F6 (Render) and Export STL.

Designed with AI assistance: an AI assistant wrote the OpenSCAD code, presets and description under my direction. The files were checked automatically (watertight, correct size, prints without supports) but have not yet been test-printed. Preview images are computer renders of the STL files.

Licence: Creative Commons Attribution 4.0 International (CC BY 4.0). You may print, remix, share and sell prints and remixes, including commercially, as long as you give attribution (credit Doyle Pounders / Print File Foundry and link to this design).