parametric-electrical-enclosure

A parametric, waterproof enclosure for electronics, designed in OpenSCAD for 3D printing. You set the size, and it builds a bottom and a lid that seal with a groove and ridge (with an optional TPU gasket), screwed together through pillars at the corners, with optional cable-gland holes, board standoffs and wall-mount flanges. No supports needed.

Assembled	Cut in half	Wall-mounted, with glands and a board

Use it

1. Open enclosure.scad in OpenSCAD and show the Customizer panel.
2. Start from the defaults or a preset (below), and set the size and features.
3. Read the console: it prints the outside and inside size, and how many screws you need and how long.
4. Export each part on its own: set part to bottom, lid or gasket.

Print the bottom as it sits and the lid top down; neither needs supports. For a waterproof case, print with 100 % infill around the seal, and print the gasket in TPU. With hex nuts, the nuts go into pockets under the floor.

Presets

enclosure.json sits next to the file, so the Customizer lists its presets:

• Wall-mounted, two cable glands and a board: 100 × 140 × 50 mm, two holes in wall A and one in wall C, board standoffs, and wall-mount flanges with two holes each. It’s the picture above.
• Large, with extra screws on both sides: 200 × 150 × 60 mm, a 20 mm lid, and a screw midway along each side as well as at the corners.

Parameters

Group	Parameters
View	part: all (laid out for printing), bottom, lid, gasket, assembled, section
Case	length, width, height (outside, closed), lid_height, wall, floor_thickness, corner_radius
Seal	groove_width, groove_depth, fit (clearance each side of the ridge), gasket, gasket_height
Screws	screw (M2 to M5), head (countersunk or counterbored), nut (heat-set insert or hex nut), extra_screws
Cable glands	gland_diameter, gland_height (above the floor), and the number of holes in each wall: glands_a (+x), glands_b (−y), glands_c (−x), glands_d (+y)
Board standoffs	board, board_spacing (between the board’s holes, x and y), board_offset, standoff_height, standoff_diameter, standoff_hole
Wall mount	wall_mount, flange_length, flange_thickness, flange_holes, flange_hole_diameter

The seal

The bottom’s rim has a groove along the middle of the wall, and the lid has a ridge that drops into it, fit narrower than the groove on each side and fit short of its floor. With gasket on, the groove is gasket_height deeper and the gasket fills that extra depth, standing 2 × fit proud, so the seated ridge presses it by fit.

Checks

just test takes about 2 s on OpenSCAD 2026.10.15. It renders the bottom, lid, gasket and assembled case at the defaults, with hex nuts and counterbored heads, at two other sizes and with both presets, and checks each part is one piece of the right size, and that assembled the bottom and lid are two. Then it checks the seal through tests/fit.scad: seated, the lid only touches the bottom; moved 0.25 mm sideways its ridge still clears the groove, and at 0.35 mm it runs into the groove’s wall; and the ridge presses the gasket by 0.3 mm. just images renders the pictures in this README.

Origin and licence

The enclosure is a new design under MIT. Its idea, a printable waterproof case with a groove-and-ridge seal and screwed corners, comes from pbtec’s Stable and waterproof OpenSCAD case, which this repository carried until it was rewritten. That version, under CC BY-NC-SA 4.0, and its parameters are in this repository’s history. MIT; see LICENSE.