---
title: "Fixing things with AI: 7 replacement parts you can print this weekend"
description: "Real examples of household repairs solved with a description and a printer: knobs, clips, feet, hinge pins, battery covers. With the prompts that produced them."
canonical: https://speakcad.com/blog/replacement-parts-with-ai
published: 2026-09-03
updated: 2026-10-13
publisher: SpeakCAD
---

# Fixing things with AI: 7 replacement parts you can print this weekend

> Real examples of household repairs solved with a description and a printer: knobs, clips, feet, hinge pins, battery covers. With the prompts that produced them.

## 1. Oven knob

Prompt: "A replacement oven knob 38 mm diameter, 22 mm tall, 6 mm D-shaft with a 0.6 mm flat, 14 mm deep, pointer line, fine grip ridges. Heat-resistant design: 3 mm walls."

Print in PETG or ASA. Verify the D-shaft flat orientation against the pointer before your second print.

## 2. Fridge shelf clip

Prompt: "A clip that hooks over a 3 mm glass shelf, 25 mm wide, with a 10 x 4 mm tab that slots 12 mm into the wall channel. Slight taper on the tab."

Measure the old clip's tab with calipers; the fit is what matters.

## 3. Chair glide

Prompt: "A chair foot glide: 22 mm diameter, 8 mm tall, with a 7 mm stem 15 mm long press-fit into a 7.5 mm hole in the leg. Dome the bottom slightly."

Four identical parts on the bed; ask for them laid out together.

## 4. Laptop rubber foot replacement

Prompt: "A laptop foot, 12 x 12 mm, 2.5 mm tall, 0.5 mm chamfer, flat bottom for a double-sided pad." TPU if you have it, PETG otherwise.

## 5. Remote control battery cover

Prompt: "A battery cover 52 x 38 mm, 1.6 mm thick, with a latch tab 8 mm wide 1.2 mm thick at one end and two 3 mm hooks at the other. Attached photo shows the original."

Attach a photo of the remote's back so the AI places the tabs.

## 6. Curtain rail glider

Prompt: "A curtain rail glider for a 4 mm slot, 12 mm long body, 2 mm shoulder each side, 4 mm eye for the hook." Ask for ten, laid out on the bed.

## 7. Hinge pin for a toilet seat

Prompt: "A hinge pin 8 mm diameter, 40 mm long, with a 14 mm cap 3 mm thick, sliding fit in an 8.3 mm hole." Print vertically for a round cross section, or horizontally with 5 perimeters for strength.

## The pattern

Measure the mating part, describe the fit, print, test, adjust by chat if needed. Most repairs cost a few AI requests (3 credits for the part, 2 for a fix, 1 for a quick edit), a download included in every plan, and a few grams of plastic.

## About SpeakCAD

SpeakCAD is the most intuitive CAD for 3D printing, made for people who own a 3D printer and need a part that fits something they have: tap a face and type a size to shape it with simple tools, or describe it to the AI, on your phone or computer, and download a print-ready STL, 3MF or G-code sliced for your printer.

SpeakCAD works inside ChatGPT and Claude as a plugin (an MCP server): ask the assistant for a part with its measurements and SpeakCAD's own CAD AI designs it, shows it in 3D in the chat and hands over a print-ready STL, 3MF or G-code sliced for your printer.

- Live demo, no account: https://speakcad.com/demo
- In ChatGPT, Claude and other MCP clients: https://speakcad.com/chatgpt-plugin, https://speakcad.com/claude-connector, https://speakcad.com/mcp-server
- Pricing: https://speakcad.com/pricing
- FAQ: https://speakcad.com/faq
- Site index for AI assistants: https://speakcad.com/llms.txt