Recently, I worked on designing a crankshaft model based on an engineering drawing using CAD.
This exercise helped me strengthen my understanding of several key mechanical design concepts:
• Reading and interpreting technical drawings
• Creating parametric sketches and expressions
• Modeling complex shaft geometry
• Designing crank webs and crank pins
• Applying proper fillets for stress reduction
• Preparing sectional views for manufacturing drawings
Key specifications used in the model:
✔ Total length: 619 mm
✔ Main shaft diameter: Ø32 mm
✔ Crank pin diameter: Ø64 mm
✔ Bolt circle: Ø109 mm with 6 holes Ø10
✔ Fillets added at journal transitions and pin junctions
Material considered: Alloy Steel (AISI 4140) commonly used in crankshaft manufacturing.
This project was a great opportunity to improve 3D modeling, engineering interpretation, and mechanical design skills.
Always open to feedback and suggestions from fellow engineers.
CRANKSHAFT
MATERIAL : AISI 4140
HEAT TREATMENT : INDUCTION HARDENED
SURFACE FINISH : Ra 0.8
ALL DIMENSIONS IN mm