Rigid Flange Coupling

Create a dimensionally accurate 3D rigid flange coupling using the following dimensions (all in mm). **Main dimensions** - Flange outside diameter: 100 mm - Flange thickness: 10 mm each - Hub outside diameter: 45 mm - Hub projection: 25 mm outward from each flange - Central bore: 20 mm - Shaft diameter: 20 mm - Shaft length: 80 mm - Bolt circle diameter (PCD): 90 mm - Bolt holes: 4 × 12 mm diameter, equally spaced at 90° intervals - Bolt shank diameter: 10 mm - Bolt head across flats: 16 mm - Bolt head height: 6.4 mm - Nut across flats: 17 mm - Nut thickness: 8 mm **IMPORTANT ASSEMBLY INSTRUCTIONS** 1. Create two circular flanges with central hubs, positioned face-to-face. 2. Keep both shafts, hubs, and central bores concentric on the same axis. 3. Position all four bolts parallel to the shaft axis, passing through the aligned bolt holes in both flanges. 4. Place bolt heads flat against one outside flange face and nuts flat against the opposite outside flange face. 5. Keep bolt heads and nuts close to the flange surfaces. Do not let bolt shanks extend excessively beyond the nuts. 6. Do not place bolts vertically or radially relative to the shaft axis. All four bolts must be parallel to the shaft axis. 7. Ensure all four bolts are equally spaced on the 90 mm PCD and remain within the 100 mm flange perimeter. 8. Do not add oversized screws, floating bolts, misplaced nuts, or extra fasteners. 9. Do not create a keyway, key slot, or key. 10. Keep the two flange mating faces in contact with no gap. 11. Make the model symmetrical, mechanically realistic, and suitable for a mechanical engineering laboratory submission. **OUTPUT:** Generate the corrected 3D solid model and export STEP (.step) and STL (.stl) files if supported. Use a clean metallic-grey appearance. Prioritize correct geometry and assembly over visual appearance.

Parameters

Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.