What to measure
Single cables reach 15 mm when they have many cores or thick rubber: five-core site and workshop cable, the lead of a welder or a large compressor, some vehicle charging leads. Measure those directly with a caliper. A bundle is harder, because it has no fixed shape. Work it out instead. Three equal cables lie as a triangle that fits in a circle 2.15 times one cable diameter, so three 7 mm cables need 15.1 mm. Four equal cables lie as a square that fits in a circle 2.41 times one diameter, so four 6 mm cables need 14.5 mm. For a mix of sizes, hold the bundle together with a turn of tape and measure across the widest point.
Clearance, wall and material
The clearance is 0.5 mm, more than on the smaller cable clips of this site, for a bore of 15.5 mm. A bundle shifts as it goes in and needs the room, and a heavy cable should lie in the clip and not be gripped. The wall is 2 mm and the opening 100 degrees, which leaves a gap of about 11.9 mm. That gap is wider than any one cable of a bundle, so the cables go in one at a time; with the opening facing up or sideways they stay in, but facing down a thin cable can slip out, and in that case narrow the opening to 80 degrees. Use PETG in a garage or outdoors.
Printing
Stand the clip on a C-shaped face so the layers run around the bore. It covers about 31.5 by 16.4 mm and is 12 mm tall. No supports are needed. Three perimeters at 0.2 mm layers make the 2 mm wall solid. Rubber cable is heavy and is often dragged sideways when a tool is moved, which levers on the clip, so give the tab solid plastic too: set at least four top and bottom layers or raise the infill to 100 percent for a part this small.
Fixing it
The tab is 12 mm long and 3 mm thick with a 4.2 mm hole for a 4 mm screw, and it needs a proper fixing: a wall plug in masonry, or timber, not plasterboard alone. Support a heavy cable every 40 to 50 cm. Cables that carry high current warm up, and several of them bundled tightly warm each other; keep power cables loosely grouped, and keep data cables in a separate clip from mains cables where your local wiring rules require it.
Outline drawing
Schematic, not to scale. The clip is 12 mm wide along the cable and about 16.4 mm high.
Parameters the generator will use
| Setting | Link parameter | Value |
|---|---|---|
| Model | model | pipe_clip |
| Cable diameter | diameter | 15 |
| Fit clearance | fit_clearance | 0.5 |
| Clip wall thickness | wall | 2 |
| Clip width along the cable | width | 12 |
| Opening angle, degrees | opening | 100 |
| Screw tab length | tab_length | 12 |
| Screw tab thickness | tab_thickness | 3 |
| Screw hole diameter | screw_diameter | 4.2 |
| Number of screw tabs | tabs | 1 |
All lengths are in millimetres. Outer size from these values: about 31.5 x 12 x 16.42 mm.
Open the generator with these values
This model needs the $7 licence key: one payment, one key, and it opens all five paid models. Get a licence key on Gumroad ($7)
The pipe and cable clip needs a licence key: without one the generator shows the model locked, lists the values from this link and fills them in as soon as you unlock. The fitted drawer organiser bin is the free model and downloads with no key.