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---
title: Bolt Torque Calculator
emoji: 📉
colorFrom: purple
colorTo: indigo
sdk: gradio
sdk_version: 5.47.2
app_file: app.py
pinned: false
license: mit
short_description: First-principles calculation of bolt torque
---
# Bolt Torque Calculator
**Author:** Sebastian Andreu
**Course:** 24679 - Designing and Deploying AI/ML Systems
This app calculates the torque required to tighten a bolt to a target preload using first-principles engineering formulas.
The interface allows users to input or select:
- Bolt diameter [mm]
- Target preload [N]
- Thread pitch [mm]
- Bolt material and lubrication (for estimating thread friction coefficient)
- Nut/under-head material and lubrication (for estimating friction under the head)
- Optional head diameter [mm]
The model outputs the required torque in **Nm** along with a natural language explanation of the result for non-experts.
---
## How to Use
1. Enter the bolt geometry and preload values.
2. Select the bolt and nut/head materials and lubrication type.
3. Optionally specify the head diameter; leave blank to use default (1.5×bolt diameter).
4. Click **Compute** to see the torque and an easy-to-understand explanation.
---
## Deployment Details
- **Frameworks:** [Gradio](https://gradio.app/)
- **Hosting:** Hugging Face Spaces
- **Model Loading:** The LLM used for explanations is downloaded from the Hugging Face Hub on startup.
---
## Requirements
Dependencies are listed in `requirements.txt`.
Includes: `gradio`, `pandas`, `transformers`
---
## Acknowledgments
- Torque calculation formulas based on standard ISO metric bolt theory
- Deployment scaffold and documentation supported with AI assistance (ChatGPT, OpenAI)
- Reference: Class-provided notebook *beam_gradio.ipynb*
---
Check out the configuration reference at https://huggingface.co/docs/hub/spaces-config-reference
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