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.*
624 Roller Thrust Fork
A bolt-down fork that holds one 624 bearing (4 x 13 x 5 mm) on a radial M4x25 axle. It is part of the 'MG996R Heavy Pan-Tilt Camera Gimbal' kit, which uses three of them. The foot is 36 x 22 x 4 mm and fixes to the base deck's M3 heat-sets through two 3.4 mm holes 20 mm apart. The roller top sits 14 mm above the deck, and M3 washers under the foot raise it to 17 mm. The rollers carry the pan platter's weight, so the MG996R's spline doesn't have to.
Twin Ball-Joint Pushrod
This is the print-in-place 100 mm pushrod for the 'MG90S Six-Servo Stewart Platform' kit (print ×6). It prints as three pieces: a 7 × 12 mm rod with a cupped socket at each end (11.0 mm spherical bore, 7.5 mm throat) and two captive 10 mm ball studs. Each stud has a 4 mm neck and a 12 × 3 mm tab with an M3 clearance hole 9 mm from the ball centre. Bolt one tab to the crank with an M3x16 and a nylock nut, and the other to the platform. The studs spin freely and tilt about ±20° with no loose ball links. Overall size is about 130 × 21 × 14.5 mm.
Arm Clamp Pen Collar
This collar is part of the 'NEMA17 Hanging Wall Polargraph Drawbot' kit. It is a 34 mm OD x 10 mm knurled ring, and its 22.4 mm bore slides over the gondola hub's 22 mm pen sleeve to hold the two line arms in place. One M3 heat-set insert goes in a 4.0 mm radial bore in a flat 14 mm pad. An M3x16 thumbscrew in that insert passes through the sleeve slot to clamp the pen and lock the collar with one turn.
Rod-Clamp Station Pointer Collar
This part is for the 'NEMA17 Geneva Indexing Turntable' kit. The collar clamps to the top of the fixed 8 mm rod through an 8.3 mm bore, with an M3 set screw and a captured M3 nut. Its OD 11.4 × 4.5 mm pad holds the upper 608 bearing's inner race in place. The collar is 22 mm across and 14.5 mm tall. A 60 mm pointer arm ends in a 60° arrow that sits over the platter's r = 50 mm stations.
140 mm Six-Station Index Platter
The 140 mm × 4 mm work platter for the 'NEMA17 Geneva Indexing Turntable' kit. It bolts to the 608 spindle tube with 3x M3x6 bolts through counterbored 3.4 mm holes on a 38 mm PCD. The 24 mm centre hole clears the pointer collar's pad. Six stations sit at r = 50 mm, 60° apart, each with two M3 holes 20 mm apart and a 6 mm locating dimple for mounting fixtures. Six 3 × 3 mm radial ribs on the underside keep it flat. It prints top-face-down, so the work surface, dimples and 1 mm rim chamfer all come out off the bed.
608 Twin-Flange Spindle Tube
The rotating spindle riser for the 'NEMA17 Geneva Indexing Turntable' kit. It is 30 mm tall, with 46 mm flanges and an OD 30 body that flares out through a self-supporting 45° cone. The bottom flange bolts to the Geneva wheel with 3x M3x10 through 3.4 mm holes on a 38 mm PCD. The top takes an upper 608 bearing (8 × 22 × 7 mm) in a 22.05 mm press seat with a lead-in chamfer, and has 3x M3 heat-set inserts (4.0 × 5 mm) for the platter. The 10 mm through-bore clears the fixed 8 mm rod.
6-Slot Geneva Star Wheel
This is the 6-slot Geneva star wheel for the 'NEMA17 Geneva Indexing Turntable' kit. It is 69.6 mm across and 8 mm thick, with 5.5 mm slots and R17 locking arcs sized for a 40 mm centre distance. The driver's 5 mm steel crank pin turns it in exact 60° steps, and the driver's locking disc holds it still between moves. It spins on a 608 bearing (8 × 22 × 7 mm) pressed into a 22.05 mm seat with a 1.5 mm lip. On top it takes 3 M3 brass heat-set inserts on a 38 mm PCD, which bolt the spindle tube above it.
Geneva Crank Pin Driver
This is the one-piece driver for the 'NEMA17 Geneva Indexing Turntable' kit. It fits on the NEMA 17's 5 mm shaft through a 5.3 mm bore and is held by an M3 set screw with a captured M3 nut. It combines a 50 mm pin disc, which holds a 5 mm x 13 mm steel crank pin at 20 mm radius, with a 33 mm locking disc 9 mm tall. The locking disc has a relief cut into it and holds the 6-slot Geneva wheel still between its 60° steps.
Twin-Flange Line Drum
Part of the 'N20 Self-Locking Worm-Drive Winch' kit. This 57 mm long spool has a 30 mm drum between two 42 mm flanges. It slides onto the kit's 8 mm steel axle (8.3 mm bore) and bears on a 608 bearing's inner race through an 11 mm shoulder. It takes three M3 heat-set inserts (4.0 x 8 mm bores on a 22 mm PCD) for the 24T worm wheel's M3x16 screws, plus an M3x8 grub screw and captured M3 nut in the 16 mm hub. The line anchors through a 2.5 mm radial hole into the hollow core or through a 2.5 mm hole in the flange.
24T Winch Worm Wheel
A module 1.5, 30° pressure angle, 24-tooth worm wheel for the 'N20 Self-Locking Worm-Drive Winch' kit. It has a 39 mm OD, a 10 mm face and a 16 x 10 mm hub, with an 11 mm shoulder that bears on the 608 inner race. The 8.3 mm bore slip-fits the 8 mm steel axle, and an M3x8 grub screw with a captured M3 nut locks it. Three M3x16 screws on a 22 mm PCD bolt it to the line drum's heat-set inserts.
Module 1.5 Winch Worm
This is the self-locking worm for the 'N20 Self-Locking Worm-Drive Winch' kit. It is a single-start, right-hand, module 1.5 worm: 15 mm OD, 12 mm pitch diameter, 4.712 mm lead and a 7.1° lead angle. It has a 16 x 10 mm collar with a 3.1 mm bore, 10 mm deep, for the N20 3 mm D-shaft, which an M3x8 grub screw and captured M3 nut hold. Its 4 mm tail pin runs in a 624 bearing (4 x 13 x 5 mm). The overall length is 39 mm, and it prints standing on the collar face.
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.
Shoulder Wing Root Rocker
This rocker is part of the 'SG90 Scotch-Yoke Flapping Wing Rig' kit, and you print two. The lever is 77 x 16 x 6 mm. It pivots on a shoulder post using an M4x16 screw and an M4 washer, through a 4.5 mm hole in a 16 mm boss that has a 0.5 mm raised thrust ring. The drive link attaches with an M3x16 screw and nyloc nut through a 3.4 mm hole 20 mm inboard. The wing root bolts to two M3 heat-set inserts (4.0 x 5 mm bores) at 30 and 45 mm outboard, which turns the slider's stroke into about ±37° of flap.
Flapper Wing Drive Link
This straight dog-bone link is part of the 'SG90 Scotch-Yoke Flapping Wing Rig' kit, and you print two. It is 46 x 9 x 4.4 mm, with 3.4 mm M3 clearance holes 37.0 mm apart in 9 mm bosses on an 8 mm wide, 4.0 mm stack. The lower end takes an M3x10 into the slider's heat-set insert. The upper end takes an M3x16 with a nyloc through the rocker. Each end has a 6.5 mm, 0.4 mm tall washer ring on opposite faces, so only the rings rub against the slider and the rocker. The whole stack is 4.4 mm and fits the 4.5 mm gap between them.
Yoke Slide Retainer Strip
This flat 12 x 56 x 3 mm strip is part of the 'SG90 Scotch-Yoke Flapping Wing Rig' kit, and you print two. Each one bolts across the top of a spine slide-channel wall with two M3x8 socket head screws into M3 heat-set inserts. The screws go through 3.4 mm holes spaced 40 mm apart, 8.4 mm in from the inner edge. The strip hangs 4 mm over the slider's edge band so the slider can't lift out. It has 3 mm radius ends and a 0.4 mm chamfer on the inner edge so the slider doesn't catch.
Scotch-Yoke Wing Slider
This slider is part of the 'SG90 Scotch-Yoke Flapping Wing Rig' kit. It is a 56 x 26 x 10 mm block with a 40 x 13.5 mm round-ended through-slot. The crank's 624 bearing (4 x 13 x 5 mm) rolls in the slot and turns servo rotation into a ±13.5 mm vertical stroke. A 32 mm wide top tab holds two M3 heat-set inserts (4.0 mm bores, 8 mm deep) 20 mm apart, where the wing drive links bolt on. The 4 mm edge bands on both sides are left flat to slide between the frame pads and the retainer strips.
Servo Horn Scotch Crank
This is the crank for the 'SG90 Scotch-Yoke Flapping Wing Rig' kit. It's a 36 x 16 x 6 mm stadium bar with a sunken seat on the back for a single-arm SG90 horn: a 7.5 mm channel plus a 10 mm centre recess. A 6 mm centre hole gives screwdriver access to the horn screw. At the other end, 12 mm from the axis, a 9 mm boss carries a 624 bearing (4 x 13 x 5) on an M4x20 bolt, which sits in a 4.5 mm clearance bore with a captive M4 nut pocket on the back.
Flapper Spine Frame Plate
This is the 84 x 108 x 5 mm backbone of the 'SG90 Scotch-Yoke Flapping Wing Rig' kit. It has a 12.6 x 24.5 mm through-pocket for an SG90 servo, with solid tab lands so you can drill pilots through your own servo's ears. It also has a 56.8 mm wide slide channel for the yoke slider, with four M3 heat-set bores (4.0 x 6 mm) for the retainer strips, and two 16 mm shoulder posts, each with a gusseted M4 heat-set bore (5.5 x 10 mm), that the wing rockers pivot on. It prints flat on its back face. The bottom 15 mm tongue has two 3.4 mm M3 clearance holes 60 mm apart for the display stand, and lightening windows keep it under 80 cm³.
Eccentric Input Cam
This is the input eccentric for the 'NEMA17 Cycloidal Joint Actuator' kit. It clamps onto a NEMA 17's 5 mm shaft through a Ø5.2 bore, using an M3 set screw that threads into a captured M3 hex nut. Its Ø24 lobe sits 1.5 mm off-centre and drives the 15-lobe disc. The part is 30 mm across and 10.5 mm tall, and the Ø30 thrust collar holds the disc up.
16-Pin Cycloid Ring Housing
This is the ring-gear housing for the 'NEMA17 Cycloidal Joint Actuator' kit. It is a Ø96 x 18 mm ring that holds sixteen 5 x 18 mm steel dowel pins in Ø5.3 through-grooves on a 34 mm pitch radius, and clamps between the base plate and the cover with four M3x30 SHCS through Ø3.4 holes on the R42 circle. The disc lobe tips reach r 34.3 mm, so the Ø68 bore is relieved to Ø69.4 across the disc zone. Ø66 lips at the top and bottom wrap each pin about 224° so the pins can't fall inward.
Jansen 123.8 mm Lower Link
Lower link k for the 'NEMA17 Twin-Motor Strandbeest Walker' kit (print ×4). It joins crank pin M to foot vertex K. The two 4.5 mm M4 pivot bores are exactly 123.8 mm apart, centre to centre, and each sits in a 16 mm OD × 6 mm hub. The flat-bottomed 14 × 5.5 mm bar is 139.8 mm long overall, with a 1 × 6 mm lightening groove along the top and a 3 mm hole at mid-length that marks it as the long link. It runs on an M4x35 (M, K') or M4x30 (K) socket head pin, with washers and a nylock nut.
Jansen 30 mm Stepper Crank
A 30 mm-throw drive crank for the 'NEMA17 Twin-Motor Strandbeest Walker' kit (print ×2). It is an 8 mm thick lever about 50 mm long. The 14 mm boss slides onto a NEMA17's 5 mm shaft (5.2 mm bore) and is locked by an M3 heat-set insert (4.0 mm bore) and an M3x6 set screw. The crank pin at M is a 4.5 mm bore with a 7.6 mm counterbore for the M4x35 socket head that carries the leg links.
Pen Lift Clamp Slider
This slider is part of the 'NEMA17 Cantilever Pen Plotter' kit. The 34 x 18 x 16 mm block runs on two 4 mm steel guide pins, 24 mm apart, through 4.4 mm slip bores. It holds any 7–12 mm pen in a 12.5 mm bore, clamped by an M3x12 screw and a captured M3 hex nut. An SG90 servo horn pushes up on the 12 x 14 x 5 mm lift tab to raise the pen. The two guide pins stop the wobble and drag you get when the lifter hangs from the servo alone.
Twin-Slot Eye Tilt Paddle
The U-shaped tilt rocker (96 × 37 × 18 mm, black) for the 'SG90 Animatronic Eye Mechanism' kit. It pivots on the y -45 / z 30 axis between an SG90 horn and an M3x16 idler pivot. Its 3 mm crossbar has two 22 × 4.2 mm rounded slots on a 60 mm pitch that steer the M3x35 eye-stalk screws. The right arm has a flat outer face for the stock SG90 horn (2 servo self-tappers) and a Ø7 hole for screwdriver access. The left arm has a Ø3.4 hole for an M3x16 SHCS, washer and nylock.