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.*
Print-In-Place 7-Link Track Strip
A 7-link, 12 mm-pitch print-in-place track strip, 28 mm wide and about 92 mm long, for the 'N20 Twin-Track Mini Tank Chassis' kit. Print 8 and join 4 into each 28-link loop. Each link has 8.4 mm knuckles and an integral 4 mm pin running in a 5 mm teardrop bore, plus a 5.6 x 7.6 mm window that the 12T sprocket teeth drive through. The strips join with M3x8 SHCS inserted from each track edge, passing through the last link's 3.4 mm bore and threading into the first link's 2.6 mm self-tap pilot.
Twin 624 Track Idler Sprocket
The free-running front idler (print 2) for the 'N20 Twin-Track Mini Tank Chassis' kit. It has the same 12-tooth, 12 mm-pitch profile as the drive sprocket: a Ø46 x 10 mm disc with teeth reaching Ø51.2. Its 18 mm hub holds two 624 bearings (4 x 13 x 5 mm) in 13.05 mm press-fit seats, one at each end, with a 10 mm lip between them. The pair spins on the hull's slotted M4x30 bolt axle and stays stiffer and better aligned than a single-bearing idler.
12T Track Drive Sprocket
A 12-tooth, 12 mm-pitch drive sprocket (Ø51.2 mm over the teeth, 10 mm disc) for the 'N20 Twin-Track Mini Tank Chassis' kit. It fits directly onto an N20 gearmotor's 3 mm D-shaft with a 3.2 mm blind bore in a 16 mm hub that is 12.5 mm long. An M3 grub screw and a captured M3 hex nut lock it to the shaft, so no separate hub or plate stack is needed. The teeth have a 45° underside chamfer so they print without supports, and they mesh with the kit's print-in-place track links.
Tracked Robot Screw-Tension Idler Arm
A bell-crank idler arm for printed tank-track robots. It pivots on an 8 mm rod and holds an 8 mm axle 60 mm away for a 608-bearing idler wheel, with a 12 mm shoulder so only the inner race rubs. An M4 bolt runs through a captured-nut lug and sets the track tension without redesigning the chassis. The arm is 80 x 54 x 14 mm with 8.3 mm slip-fit bores.
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.