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Jansen Upper Rocker Triangle
An open truss rocker triangle (print ×4) for the 'NEMA17 Twin-Motor Strandbeest Walker' kit. It has three 16 mm OD × 8 mm pivot hubs with 4.5 mm M4 bores at centre distances of B-J 83.0, J-D 80.2 and B-D 111.6 mm, joined by 14 mm wide × 7.5 mm bars. It pivots on the frame's M4x30 screw at B and carries M4x25 pins at J and D. Dimples mark the vertices (one for J, two for D), so you can flip the part for the rear leg or the other side and still tell them apart.
🧩 Part of the NEMA17 Twin-Motor Strandbeest Walker (leg rocker triangle B-J-D on the frame pivot) kit.
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