---
name: parametric-parts
description: "Make an adjustable bracket or enclosure with dimensions you can change later."
---

# Parametric parts that fit

Use this workflow to design simple, non-safety-critical printable parts with editable dimensions in OpenSCAD.

## Before modeling
Ask for measured interfaces, desired fit, fastener specifications, load expectations, and printer/material constraints. Do not infer unknown measurements from an unscaled photo. Confirm an OpenSCAD executable or authorized modeling tool is available.

## Workflow
1. Define named parameters for dimensions, wall thickness, clearances, and fastener holes. Document units as millimetres and distinguish measured dimensions from proposed tolerances.
2. Use simple, readable constructive geometry. Keep the model and its fit-test coupon in an editable .scad source.
3. Render the geometry and inspect warnings. If export is available, produce an STL and verify its dimensions. Do not label a preview as a completed export.
4. Recommend a small fit test before printing the full part. State assumptions about material, shrinkage, hole orientation, and support requirements.

## Completion
Return the source, available exports, adjustable parameters, and a fit-test checklist. Do not claim certified load capacity, universal fit, or an engineering-grade CAD exchange file unless one was actually produced and checked.

## Example request

Create a parameterized cable bracket for a 25 mm desk edge. Use two 4 mm mounting holes and make wall thickness and clearance adjustable. Include a small fit-test coupon.