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.*
NEMA 17 Sprung Suspension Swing Arm
A swing-arm suspension pod that bolts a NEMA 17 drive motor to a rover chassis through an 8 mm rod pivot, with an integrated printed leaf spring that keeps the wheel loaded over bumps. Motor face uses the 31 mm M3 bolt square with a 22.6 mm clearance bore for the 22 mm pilot boss; the pivot hub is a 16 mm long 8.3 mm bore (slip fit on 8 mm rod) set 95 mm from the motor axis, and the leaf tip pad bears on a chassis stop. Overall 127 x 48 x 16 mm, printed flat so all bending load runs in the XY plane instead of across layer lines.
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.
Snap-Link Robot Tank Track
A six-link print-in-place tank track for small tracked robots and rovers: 16 mm pitch, 30 mm wide pads, 4 mm integral hinge pins in 5 mm bores (0.5 mm clearance everywhere), 106 x 30 x 10.5 mm per strip. Each clevis has a snap mouth that opens upward so printed strips push together into any length loop while track tension pulls against solid bore wall, and a center guide horn keeps the belt on a twin-wheel bogie; knuckles engage a 16 mm pitch sprocket.