Prosthetic Finger Assembly

Create a parametric 3D CAD model of a single mechanical prosthetic finger for a robotic hand. The finger should consist of: - 3 rigid segments: proximal, middle, and distal phalanx - 2 mechanical hinge joints between the segments - a third hinge at the base connecting the finger to the palm - cylindrical hinge pins with 4 mm diameter - each segment should have a hollow internal cavity to reduce weight - wall thickness: 3 mm - rounded external edges with 2 mm fillets - finger width: 18 mm - proximal segment length: 45 mm - middle segment length: 30 mm - distal segment length: 25 mm The hinge axes must be aligned and mechanically usable. Add mounting holes for mechanical actuation: - 2 mm diameter holes - positioned near each joint - designed so that a tendon, cable, or small linkage could actuate the finger The base of the proximal segment should include a flat mounting interface for attaching the finger to a robotic palm. Design the geometry specifically for FDM 3D printing using PETG. Avoid unsupported overhangs where possible. Keep the model symmetrical along its central plane. Generate a true parametric solid CAD model, not just a visual mesh. Use separate named components for: 1. Proximal phalanx 2. Middle phalanx 3. Distal phalanx 4. Hinge pins Make all major dimensions editable parameters. The final assembly should demonstrate how the three finger segments connect through the hinge pins and should have realistic mechanical clearances between moving parts.

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.