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.*
70 mm Clamp-Hub Rover Wheel
This direct-drive wheel is part of the 'NEMA17 Rocker-Bogie Mars Rover Chassis' kit (print ×6). It is 70 mm OD × 26 mm wide, with a 2.5 mm rim shell, 18 grouser tread bars 3 mm wide and 2 mm tall, and a 3 mm face disc with 6 spoke windows. The 16 mm hub has a 5.3 mm bore for a NEMA17's 5 mm shaft. An M3 screw 5 mm from the hub face clamps the shaft and threads into an M3 hex nut captured in a 5.7 mm slot that is open at the top. A 6 mm hole through the rim lines up with the screw so a hex key can reach it.
Differential Cross-Pin Link
Link for the 'NEMA17 Rocker-Bogie Mars Rover Chassis' kit (print ×2). It has 40 mm between hole centres and joins the 625 differential bar end to the rocker ear. End A is a 12 mm OD × 6 mm eye with a vertical 3.4 mm hole. End B is a 10 × 12 × 12 mm boss with a 3.4 mm cross-hole along Y, 6 mm up. The two hole axes are perpendicular, so the link works as a cardan-style joint. Each end takes an M3x25 bolt with a nyloc nut and washers.
625 Differential Rocker Bar
This is the differential bar for the 'NEMA17 Rocker-Bogie Mars Rover Chassis' kit. It is a 172 × 28 × 8 mm bar that pivots under the deck on an M5x25 bolt. A 625 bearing (5 × 16 × 5 mm) press-fits into a 16.05 mm pocket in the 28 mm hub. Each end at ±80 mm has a 3.4 mm eye for the M3x25 cross-pin links, so the bar averages the two rocker angles and keeps the deck level.
Twin-Motor Bogie Arm
The rear bogie arm for the 'NEMA17 Rocker-Bogie Mars Rover Chassis' kit (print ×2; the arm is symmetric, so one print fits either side). It is an 8 mm thick flat plate, 126 × 64 mm. A 22.05 mm bore takes a press-fit 608 bearing on the M8x35 bogie pivot bolt. Two 46 × 46 mm NEMA17 pads, 80 mm apart, each have a 31 mm square of 3.4 mm holes for M3x12 screws and a 22.5 mm pilot hole. The two top outer corners are chamfered 8 mm so the arm clears the rocker as it swings.
Rocker Arm With 608 Pivot
This is the main suspension rocker for the 'NEMA17 Rocker-Bogie Mars Rover Chassis' kit (print ×2). Both faces are identical, so the same print works on the left and right sides. It is an 8 mm thick flat arm about 154 × 104 mm. The main pivot is a 22.05 mm through-bore that takes a press-fit 608 bearing on an M8x40 bolt. The front NEMA17 pad has four 3.4 mm M3 holes on a 31 mm square and a 22.5 mm pilot hole. The bogie pivot boss has an 8.4 mm hole for the M8x35 bolt, and the differential ear has a 3.4 mm hole for an M3x25 link bolt.
M8 Rocker Pivot Pillow Block
Pivot block for the 'NEMA17 Rocker-Bogie Mars Rover Chassis' kit (print ×2). It carries the M8x40 rocker pivot bolt in an 8.4 mm teardrop bore 13 mm above the deck. It bolts to the deck grid with four M3x16 screws and hex nuts on a 40 × 20 mm pattern, through a 50 × 34 × 6 mm flange. The 24.5 mm tall rounded upright has two 45° gussets.
Rover Grid Deck Plate
This is the main 150 x 172 x 5 mm deck of the 'NEMA17 Rocker-Bogie Mars Rover Chassis' kit. It has a 20 mm pitch grid of 3.4 mm M3 through-holes, so electronics can mount anywhere with M3 screws. It has solid landing pads for the two M8 pillow blocks (M3x16 bolts with hex nuts under the deck), a 5.5 mm hole at (50, 0) for the M5x25 differential pivot, and a 3 mm stiffening lip around the edge. There are 44 lightening windows, each about 12 x 12 mm, to keep the weight down.