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Sawtooth Traction Foot
This is the one-way grip sole for the 'SG90 Sawtooth-Foot Inchworm Crawler' kit (print ×2). It is a 60 x 50 x 4 mm plate with 1.5 mm sawtooth ridges on a 5 mm pitch, so it slides forward and bites when pushed back, which turns the servo's rocking into crawling. The top face takes four M3 brass heat-set inserts in 4.0 mm bores on the kit's 30 x 20 mm pattern (the bores run through the 5.5 mm foot). A 45° notch on the top edge marks the front.
🧩 Part of the SG90 Sawtooth-Foot Inchworm Crawler (one-way grip sole under each body segment) kit.
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