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.*
Ackermann Trapezoid Tie Bar
Fixed-length tie bar for the 'SG90 Ackermann Steering Rover Chassis' kit: a 77 x 24 x 6 mm flat bar joining both knuckle arms through 3.4 mm pivot holes 65.1 mm apart (two M3x25 SHCS + nylocks). A 3.4 x 16 mm centre slot takes an M3x20 pin through the SG90 horn's outer hole, so it works with any horn radius from about 10 to 16 mm.
SG90 Kingpin Steering Beam
This is the front axle beam of the 'SG90 Ackermann Steering Rover Chassis' kit. It is a 6 mm plate, 62 x 90 mm, with two Ø14 kingpin ears 76 mm apart for M3x25 kingpins, and a 24 x 44 mm M3 pattern that bolts it under the deck with M3x16 screws and nuts. It also has a 23.6 x 12.8 mm through-pocket for an SG90 servo, with 2.4 mm tab slots so it fits clone servos whose tab spacing varies. Two Ø2.9 holes, each with a Ø7 nut recess on top, clear the deck's front M2.5 Pi Zero screws.
Ackermann Steering Knuckle Upright
A steered-wheel upright for rover and RC-scale robot chassis: a 34 mm tall post with a 5.3 mm kingpin bore (5 mm dowel or M5 bolt), a 20 mm deep 8.3 mm socket for an 8 mm stub axle locked by an M3 grub screw in a 4.0 mm heat-set boss, and an Ackermann tie-rod arm with a 3.4 mm M3 hole 32 mm from the kingpin, angled inboard. Overall 46 x 44 x 34 mm; mirror it in your slicer for the opposite side.