Reverse Engineering
A physical part, 3D scan or photo becomes accurate, fully editable CAD — dimensions recovered, intent rebuilt, files you own.
Hi, I'm Engr. Muhammad Shahryar Khan
From sketch, photo or part to manufacturing-ready CAD.
I'm a PEC-registered mechanical design engineer working solo. Give me what you already have — a hand sketch, a photo, a worn part or a rough PDF — and I'll turn it into production 3D models and fully dimensioned GD&T drawings, delivered in 48 hours.
- 48hTypical turnaround
- 100%Upwork Job Success
- PECRegistered engineer
planetary_gearbox.sldasm
3:1 · involute · fully mated
SolidWorksAutoCADGD&T / DFMReverse EngineeringSTEP & Native ExportsSheet MetalParametric Automation
01 — What I do
One outcome: files your shop can build from.
Not general CAD. A focused pipeline that takes any input to manufacturing-ready output.
Sketch / PDF to CAD
Hand sketches, legacy drawings or rough PDFs turned into clean, parametric production models.
2D Production Drawings
Fully dimensioned drawings with GD&T, tolerances, sections and BOM — sized for the shop floor and QA sign-off.
3D Modeling & Assemblies
Parts, mechanisms and consumer products — mated, motion-checked and export-ready in native or STEP.
DFM Review
Every part checked for machining or molding, so it's built right the first time — not just pretty on screen.
Parametric & CAD Automation
Python-driven parametric models that regenerate whole families of parts from a handful of inputs.
02 — Selected work
Real assemblies, drawn for manufacture.
Four pieces from the portfolio — modelled in SolidWorks, mated and drawing-ready. Open any card for a 360° view.
Planetary Gearbox — 3:1 Epicyclic Reduction
Problem — A 3:1 reduction was needed in a compact, coaxial envelope where a standard gear train wouldn't fit.
Solution — A fully-mated star epicyclic train with true involute tooth profiles; sun, planets, ring and carrier regenerate from module, tooth count and pressure angle.
Rigid Flange Coupling — Assembly + Drawing Set
Problem — Two shafts needed a rigid, torque-transmitting connection with drawings a shop could quote and cut from directly.
Solution — A 10-component assembly with hex-bolt fasteners, fully mated, plus a complete production drawing set with BOM and section views.
Dual-Side Soap Dispenser — Consumer Product
Problem — A twin-outlet dispenser concept had to become a real, moldable 7-part product with working seals.
Solution — A full assembly — perforated face plates, housing, internals and seals — modelled for injection molding and ready to prototype.
Clevis Shackle Bolt — GD&T Machining Drawing
Problem — A load-bearing clevis shackle bolt needed a drawing tight enough to machine and inspect without back-and-forth.
Solution — A single machined part with a fully GD&T-toleranced production drawing — datums, feature control frames and callouts sized for CNC and QA.
03 — How it works
Three steps. Forty-eight hours.
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01
Send what you have
A sketch, photo, PDF or physical part — plus what it needs to do. No CAD file required to start.
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02
I model & draw
I build the manufacturing-ready CAD and GD&T drawings, checking design intent with you along the way.
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03
Delivered, ready to cut
Native + STEP files and production drawings, dimensioned and toleranced so your shop can quote and machine immediately.
04 — About me
A solo mechanical engineer who ships files, not just renders.
I'm Shahryar — a PEC-registered mechanical design engineer. For years I've turned ideas and existing parts into designs that reach the shop floor, with the datums, fits and callouts done right the first time. You work directly with me from brief to delivery: clear communication, honest timelines, and a 100% Job Success record across freelance projects since 2020.
SolidWorksAutoCADGD&TDFMPython CAD Automation
Available for new projects
Send me your sketch, photo or part.
Tell me what it is and what it needs to do — I'll come back with exactly how I'd take it to manufacturing-ready files, and a 48-hour quote.
Email the project brief →