Tip-Over Skid Leg
Part of the 'NEMA17 Self-Balancing Robot Frame' kit (print ×2): a 10 mm thick triangulated skid leg that bolts under each end of the 120 × 80 mm base deck. It stops a fall at about 27°, on a 5 mm radius foot that sits 64 mm below the deck. The 35 × 8 mm flange takes two M3x12 screws through 3.4 mm holes at y = 10 and 20 mm. M3 nuts drop into captive 5.7 mm side slots, so they're held in the flange. It stays within x = ±5 mm, clear of the NEMA17 motor bodies.
robotics kit self-balancing skid