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.*
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.
608 Dead-Wheel Odometry Swing Arm
A spring-loaded swing arm for a passive odometry "dead wheel". It pivots on an 8 mm rod or M8 bolt and carries two stacked 608 bearings (8 x 22 x 7 mm) in a 16.5 mm hub, so your M8-bolt axle and tracking wheel stay square to the floor. Pivot to axle is 70 mm. There is a 4.5 mm hole for a spring or rubber band that keeps the wheel pressed down, and two M3 heat-set bosses 38 mm apart where you can attach your own encoder bracket. It's a cheap stand-in for commercial odometry pods on skid-steer and holonomic rovers.