01 · Part
Spur gear
48 teeth, module 3, a keyed Ø40 bore and lightening holes. One sentence in, one finished part out.
Brief
AI CADFrom a short brief to a full assembly
Send a short brief with photos or sketches and the sizes you know. Mechpro returns every part as a solid model, fitted into the assembly, with drawings, a parts list and an engineering report.
Single-stage spur gearbox, 3:1 reduction, module 2, 22-tooth pinion, Ø17 input and Ø25 output shafts, cast aluminium housing with a bolted cover.
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SOLIDWORKS, Inventor, Fusion, CATIA, NX and Creo open the STEP file as solid bodies, and AutoCAD opens the DXF. Only those programs can write their own file types, so we send STEP and DXF instead.
Examples
Three briefs and what each one became. Every picture is rendered from the solid model generated from its brief.
01 · Part
48 teeth, module 3, a keyed Ø40 bore and lightening holes. One sentence in, one finished part out.
Brief
02 · Assembly
Shaft, gear, spacer, washer, coupling flange and four bolts, each part sized to fit the next.
Brief
03 · Machine
Housing, cover, shafts, gear pair, bearings, end caps, keys and every fastener, from the same brief as the demo above.
Brief
How it works
No CAD skills needed. Say what the part has to do, add pictures and the sizes that matter, and name any file format you need.
Create an account and describe the part in a few sentences. Attach photos or sketches and the dimensions that must be kept.
When your brief needs it, our engine first looks up references and runs sizing calculations. Then every part is designed, sized and fitted into the assembly. Bearings, keys and fasteners are picked from the standards.
3D model, drawings, parts list and report, in the formats you asked for. Ask for changes in plain words.
What Mechpro can do
Every tile below comes from the example gearbox above. The numbers are taken from its solid model, its drawings and its report.
Made parts and purchased parts are placed, mated and counted, with an exploded view and balloons for every item.
16 unique · 6.88 kg · 11 drawing sheets
Sizes follow from the brief: pitch diameters, centre distance and ratio, with bearings chosen to the shaft journals.
From the solids and the material of each part.
Views chosen and scaled, hidden edges resolved, dimensions placed and the title block filled in. ISO first-angle or ASME third-angle.
| Working out revision B… |
Download the example package to see everything: STL and OBJ meshes, PDF, SVG and DXF drawings, the report, the parts list and the parameters.
From brief to design
You give the intent. Mechpro fills in the engineering and lists every decision, so nothing is hidden from you.
Drawings
Open any sheet from the example. The assembly sheet carries balloons and a parts list; part sheets carry views, hidden lines and dimensions.
Laying out the sheets…
Rev A · ready for review
Questions, or a project you'd like to talk through first? Write to mechpro.ai@gmail.com
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Legal
Effective 18 October 2026 · Version 2026-10-18
These terms are an agreement between you and Mechpro ("Mechpro", "we", "us"). By creating an account or using Mechpro you accept them and our Privacy Policy. You must be at least 18 years old and able to enter into a contract. If you use Mechpro for a company, you confirm that you may accept these terms on its behalf.
You send a written brief, optionally with pictures and reference dimensions. We return 3D CAD models, engineering drawings and a technical report in the formats you ask for, where we can produce them. Some proprietary formats cannot be produced; when that happens we tell you and supply an open format, such as STEP, instead. We use automated design tools, which may look up reference information on the public web and run first-pass sizing calculations, and the details of how a design is produced may change over time.
Do not use Mechpro to request or produce:
Do not attack, overload, scrape or test the security of the service without our written permission, and do not upload malware. We may refuse or stop any request, and suspend accounts that break these rules.
Mechpro is not built to handle export-controlled technical data. Do not send designs, drawings, dimensions or other data that are covered by export controls, such as:
Your requests are stored and processed on commercial cloud servers in the United States and by AI providers and web search services, and may be seen by people who are not US persons. Sending controlled data to us could therefore break export law. Each time you send a request or ask for a change, you confirm that it is not export-controlled. You are responsible for classifying your own designs. If we learn that a request is export-controlled, we will stop work on it and delete it, and we may suspend the account.
Designs are produced with automated tools and checked against the requirements you state and, where our tools looked up reference information or ran sizing calculations, against those too. They are not certified and may contain errors. Any calculations in the report are first-pass sizing calculations made with automated tools from published formulas and the references listed in the report; they are not a structural analysis, a certified calculation or a substitute for one. Tolerances and fits on the drawing and in the report are proposals worked out from published standards, not a manufacturing specification until an engineer confirms them. A result marked as passing a check means that a feature with that value exists; it does not mean that the design is fit for your purpose. Before you manufacture or use any design, a qualified engineer must review and verify it, including every reference, calculation and tolerance in the report, especially for anything that carries loads or pressure, or is used in vehicles, aircraft, medical devices, lifting equipment or other safety-critical applications. You are responsible for that review and for how a design is used.
You can delete your account at any time from the account menu. We may suspend or close an account that breaks these terms, and we will tell you why unless the law prevents us. We may also change or stop parts of the service; if we stop the service entirely, we will give you reasonable notice so that you can download your files.
To the extent the law allows, Mechpro is provided "as is", without warranties of any kind, including fitness for a particular purpose, and without a promise that it will always be available or error-free.
To the extent the law allows, we are not liable for indirect or consequential losses, such as lost profits, lost data or production costs arising from a design. Our total liability for any claim is limited to the greater of the fees you paid us for the request concerned and INR 5,000. Nothing in these terms limits liability that cannot be limited by law.
You will compensate Mechpro for claims by others arising from content you sent us that you had no right to share, from export-controlled data you sent us, or from how you used a design.
We may update these terms. We will post the new version here with a new date and, for significant changes, email you before they apply. If you keep using Mechpro after that, the new terms apply.
These terms are governed by the laws of India. Disputes are subject to the exclusive jurisdiction of the courts in India.
Questions about these terms: mechpro.ai@gmail.com.
Legal
Effective 18 October 2026 · Version 2026-10-18
Mechpro ("Mechpro", "we", "us") turns a short written brief into 3D CAD models, engineering drawings and technical reports. For the personal data described here, Mechpro is the Data Fiduciary under India's Digital Personal Data Protection Act, 2023 (the "DPDP Act"). You can reach us at mechpro.ai@gmail.com. If you live outside India, for example in the United States, this policy also explains how we handle your data, and section 9 describes your rights.
mp_session keeps you signed in; it expires after 30 days or when you sign out. mp_device remembers a browser that has proved itself with a code from your email, so it does not need a new code each time; it lasts 180 days and is sent only to the sign-in part of the site. We do not use advertising or analytics cookies, and the website keeps nothing about you in your browser's storage.We do not ask for payment card details, government ID numbers or other sensitive information. Please do not put them in a brief.
We process your data on the basis of the consent you give when you create an account and send a request, and for the legitimate uses the DPDP Act allows, such as complying with the law.
We do not sell or rent personal data. We share it only with service providers that help us run Mechpro, and only what each one needs:
The website itself loads nothing from other companies: its fonts, scripts and 3D viewer all come from our own server.
We may also disclose data when the law requires it, for example to a court or a government authority, or if Mechpro is reorganised or sold, in which case we will tell you first.
Our servers, your files and our backups are in the United States, and our AI providers process requests there. Web searches made for your design (section 5) may be answered by servers outside the United States. If you are in India, this means your data is transferred to and stored in the United States. We transfer data only as the DPDP Act permits, and not to any country the Government of India has restricted. Cloudflare may carry your traffic through the data centre nearest to you.
No system is perfectly secure. If a breach affects your data, we will tell you, and the authorities where the law requires it, such as CERT-In and the Data Protection Board of India, or regulators in US states.
Under the DPDP Act you can:
Wherever you live, including the United States, you can use the same tools to see, download, correct or delete your data, and we answer requests sent by email within 30 days. We do not sell your personal data, and we do not share it for targeted advertising.
Mechpro is for people aged 18 and over. We do not knowingly collect data from children. If we learn that we have, we delete it.
When we change this policy we will post the new version here with a new date. If a change is significant, we will email you before it applies.
Grievance Officer, Mechpro
Email: mechpro.ai@gmail.com
Tell us what you need. The model works out the rest.
Drag to turn · scroll to zoom · click a part
Each file is prepared when you download it.