Reference Beta
Battery Terminal Boot
Cover for a battery terminal and its clamp, with a spout the cable leaves through. Round to square in one slider, any clamp size, any cable, and a spout that can bend down toward the loom. A splash and finger guard, not a rated terminal cover.
This part is in beta. It renders and exports, but the geometry is still moving: dimensions may change between versions, and it has not been through a printed fitment check. Worth knowing before nine hours and a kilogram of filament.
Printing it
- Material
- TPU 95A
- Minimum wall
- 1.6 mm
Print crown-down: the crown is flat and the cup walls rise straight off it, so the cup needs nothing. As designed, the spout needs support under it whatever its bend: it leaves the cup level before it turns, and the mouth bead is a ledge. Tree supports touching the build plate come away cleanly from the outside of the spout. Or turn on Print without support, which reshapes the spout, the flange and the bore so that nothing overhangs. TPU so it stretches over the clamp and the ribs grip the cable; PETG works if you want it rigid, but it will not go over a clamp any bigger than its opening.
What it works out for you
Recomputed from your numbers as you type, and shown beside the viewer.
- Width at the foot (mm)
- Outside height (mm)
- Mouth clears the flange by (mm)
Parameters
Every number this part is generated from. The geometry is built from these rather than scaled from a fixed model, so a value you can measure off your own car is a value you can type in.
Terminal cup
| Parameter | Range | Default | What it does |
|---|---|---|---|
| Inside width | 20–90 mm | 42 mm | Across the clamp, at right angles to the cable. Measure the clamp with the cable fitted, at its widest, and add a few millimetres: a typical SAE top-post clamp wants about 40, a JIS one less. |
| Inside length | 20–90 mm | 42 mm | Along the cable. Equal to the width for a round or square cup; different for a clamp or stud block that is longer one way. |
| Inside height | 15–80 mm | 34 mm | From the battery top to the underside of the crown. It has to clear the top of the post and any bolt head on the clamp. |
| Shape | 2–8 | 2 | 2 is round, 8 is a nearly square box with small corner radii. In between is a rounded square, which suits most stud blocks on race batteries better than either end. |
Cable spout
| Parameter | Range | Default | What it does |
|---|---|---|---|
| Cable diameter | 6–32 mm | 14 mm | Over the insulation. Measure it: very roughly 10 to 12 mm for 25 to 35 mm² cable and 13 to 15 mm for 50 mm², but insulation varies more between makers than the copper does. The bore is cut to exactly this, and the ribs grip below it. |
| Spout height | 8–70 mm | 17 mm | Spout centre above the battery top, where it leaves the cup. Match it to where the cable leaves the clamp. |
| Spout bend | 0–60 ° | 0 ° | 0 runs straight out of the side, like the moulded originals. A bend turns the cable down toward the loom. On its own it does not make the part easier to print -- the spout still leaves the cup level -- so use the support-free option for that. The spout mouth has to stay above the foot flange, so a bend wants the spout higher or shorter. |
| Spout length | 8–60 mm | 26 mm | Straight run after the bend. At least the cable's own diameter, or it does not hold the cable where it leaves. |
| Mouth bead | 0–5 mm | 2.5 mm | Rolled bead round the spout mouth. It stops the mouth splitting when the cable is pushed through, and it is the part that takes the wear. Left off when printing without support: a bead is a ledge whichever way up the part prints. |
| Grip ribs in the spout | On or off | On | Up to three V-shaped rings inside the bore, 0.8 mm deep. In TPU they grip the insulation and keep water off the terminal without the whole spout having to be a press fit. Printing without support puts them on the top half of the bore only, where they cannot overhang. Off for a rigid print, where they would only make the cable hard to push through. |
Shell
| Parameter | Range | Default | What it does |
|---|---|---|---|
| Wall thickness | 1.6–4 mm | 2.4 mm | |
| Foot flange | 0–6 mm | 2 mm | How far the bead round the open rim stands out from the wall. It keeps the rim from rolling back as the cable pulls on it, and gives a fingernail something to get under. It is one wall tall, or a 45 degree skirt when printing without support. 0 leaves the rim plain. |
Printing
| Parameter | Range | Default | What it does |
|---|---|---|---|
| Print without support | On or off | Off | Reshapes the part so it prints crown-down with no support anywhere. The spout's cross-section becomes a lens, pointed top and bottom, with a keel along its top -- a web that climbs back to the crown at 45 degrees, so the spout grows off a bracket instead of hanging in air -- and its bore gets a pointed floor. The foot flange becomes a 45 degree skirt, the mouth bead is left off because it is a ledge any way up, and the grip ribs move to the top half of the bore. The keel stays on the part: it is a stiffening rib, not something to cut away. |