Drain Hair Snake — Barbed Clog Remover

A flat, flexible, barbed drain hair snake that rakes hair clogs out of a shower, bath, or sink drain. Push the tip down the drain, twist, and pull — the backward-pointing harpoon barbs grab the hair and drag the clog back out. One-piece print, no supports, no assembly, no loose parts.

Size: 240 × 30 × 2.6 mm (fits a 256 mm bed straight). Bump spine_len in the SCAD and rotate the plate ~45° on the bed for a longer reach.

Barb geometry. The barbs are harpoon-shaped: the tip-side edge is a long gentle ramp that slides in past the hair, while the handle-side edge is a short undercut that catches and holds on the pull. Barbs alternate left/right every half-pitch for staggered, full-width coverage. The handle ring doubles as a hang loop and as a stop so the strip can never disappear down the drain.

Print orientation. Lies flat on the bed; every barb is an in-plane cut, so it prints with no supports and no brim. The thin strip flexes out of plane to follow the bend of a P-trap.

Material — use PETG. The barbs are thin cantilevers. PETG is strongly preferred because it flexes; PLA is brittle and snaps the barbs on the first stubborn clog. Print walls thick, modest infill.

Parametric. Edit the variables at the top of drain_hair_snake.scad to retune: spine_len (barbed strip length), thickness (strip / flex member), barb_len (how far the barbs stick out), barb_back (undercut depth = catch strength), barb_pitch (spacing per side), and ring_od / ring_id (the handle loop).

The gallery shows the printed strip (white) plus isometric and top-down renders of the barb pattern and finger loop.