Heads up: many models on this page are AI-generated or uploaded untested. They may be misconfigured for the intended application — check the dimensions and tolerances, and verify or edit the model before printing or relying on it.*
Front Arm Crossbeam
This is the front crossbeam for the 'SG90 Sawtooth-Foot Inchworm Crawler' kit. It ties the horn-side drive arm and the idler-side swing arm to the front sawtooth foot. The plate is 40 x 80 x 6 mm with four 3.4 mm M3 clearance holes on the 30 x 20 mm foot pattern. It also has four 3.4 mm arm slots at x ±6 that run 15–33 mm out from the centre on each side, so the arm spacing can be adjusted. Each slot has a 6.5 mm wide, 3.5 mm deep counterbore underneath, which keeps the M3x16 screw heads flush against the foot.
Idler-Side Swing Arm
This is the pinned side of the front yoke in the 'SG90 Sawtooth-Foot Inchworm Crawler' kit. It is a 5 mm thick, 94 mm long flat arm with an 8 mm radius boss and a 4.3 mm slip-fit bore that rides on the kit's 4 mm steel pin. Its pad edge is 20.1 mm below the pivot and has two 2.6 x 15 mm M3 self-tap pilots at x 64 and 76, where M3x16 screws come up through the front crossbeam.
SG90 Side-Lying Clamp Strap
This inverted-U strap is part of the 'SG90 Sawtooth-Foot Inchworm Crawler' kit. It clamps an SG90 servo lying on its side onto the chassis pedestal, gripping the body so no screws go through the servo's fragile ears. The strap is a 46 x 10 x 4 mm bridge with two 12 mm legs on a 38 mm spacing and a 30 mm inner gap. Each leg has a 3.4 mm hole and a 6.2 mm head pocket open at the end, and takes an M3x16 screw into the pedestal's M3 heat-set inserts.
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.
Inchworm Servo Pedestal Chassis
This is the rear body of the 'SG90 Sawtooth-Foot Inchworm Crawler' kit. It is a 136 x 60 x 4 mm deck with a grid of 3.4 mm holes on a 10 mm pitch, where the rear sawtooth foot mounts with M3 screws. It also has two 3 x 22 mm battery-strap slots and a hollow, ribbed pedestal 16 mm tall that holds an SG90 servo lying on its side. The servo sits between cradle walls 23.6 mm apart and is clamped through two M3 brass heat-set inserts in 4.0 mm bores. Two 3.4 mm deck holes take the idler pivot post with M3x12 screws and nuts.