Simplified Bone End

Create a simple, simplified bone-end model for a 3D-printed educational knee model. Units: millimeters. One single solid part, no assemblies. Total height: 75 mm. Built from bottom to top: 1. Shaft: vertical cylinder, 45 mm diameter, 30 mm tall. The bottom face is perfectly flat. 2. Flare: a smooth loft from the 45 mm circle up to a rounded rectangle 80 mm wide (left-right) by 70 mm deep (front-back), over 30 mm of height. The slope must stay under 45 degrees from vertical. 3. Head: a straight section on top of the flare, same 80 x 70 mm rounded rectangle, 15 mm tall. Fillet all outer vertical edges with 12 mm radius and the top outer edge with 4 mm radius. 4. The top face of the head is completely flat and parallel to the bottom face, so two identical copies can face each other with a flat gap between them. No holes, no recesses, no anatomical details. Smooth organic shape. The part must be a watertight manifold solid. Export as STEP.

Parameters

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