3D Exercise 158

Exercise 158

Features used to make this exercise:

In this CAD tutorial we'll use the features: 

1. Revolve — Creates the initial cylindrical/elliptical shank sections by rotating a profile around the central axis.

2. Offset Plane — Creates sketching planes parallel to an existing face at set distances, used to position the cross-section sketches along the length of the hook.

3. Plane at Angle — Creates angled sketching planes (like the 35° and 50° construction lines in the drawing) to position the curved cross-sections of the hook body correctly in 3D space.

4. Loft — Connects the varying cross-sections (Section A-A, Section B-B, and the elliptical shank) to build the smoothly transitioning, asymmetric hook shape.

5. Thread — Adds the precise M90x5 threaded shank at the top of the hook, used to mount it into a crane block or swivel.

6. Fillet — Rounds the transition zones (like R6, R25.3, R80, R200, R232, R240) — critical for a forged/cast hook, since sharp corners create stress concentrations that can cause failure under load.

7. Chamfer — Adds the angled edge break at the thread entry (45°) for smoother assembly and safer handling.

All dimensions are in mm/g/s/ISO  

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2D Sketch

Sketch 158

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Tutorial In Autodesk Fusion: https://youtu.be/5ERRYYx9t3E

Tutorial in FreeCAD: