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A front bumper bezel for the HC-SR04 ultrasonic sensor: the two 16 mm transducer cans press into 16.2 mm bores on 26 mm centres with 8 mm of engagement, so the board is held by the cans alone and no PCB hole pattern is needed (clone boards vary). Side shrouds protect the PCB and header, the 52.4 x 38 mm foot has two M3 clearance holes on 40 mm centres for a chassis deck plus two M5 clearance holes on 12 mm centres for 2020 T-nuts, and a rear arch takes a zip tie for cable strain relief. Overall 52.4 x 38 x 29 mm.
A 68 × 38 × 5 mm carriage plate that bolts straight onto an MGN12H block (20 × 20 mm M3 pattern, heads recessed in 6.2 mm counterbores) and clamps both ends of a 6 mm GT2 belt on 2 mm-pitch tooth ridges, held by a zip tie through the four 4 × 3 mm slots. Four M3 heat-set bosses (4.0 mm bore, 6 mm deep) on a 38 × 25 mm grid give a flat tool deck for a gantry head, sensor or gripper — the piece a linear-rail axis normally needs but the rail kit never includes.
A split clamp for a 31.8 mm handlebar that carries a second 22.2 mm accessory bar stub 55 mm out to the side, so lights, a GPS, a bell and a phone mount stop fighting for stem space. Closed by two M5 bolts with captured nuts, 99 x 44 x 55 mm, gusseted web under the stub.
A print-in-place four-bar over-center toggle clamp (125 x 46 x 26 mm) that pushes a 24 mm wide pad sideways to lock a workpiece against a fence — handle, coupler, arm and base all print as one piece on printed pivot pins with 0.5 mm clearances. The base bolts down with two M5 clearance holes plus two 20 mm M5 slots so the clamp can be slid to the work on a T-track, 2020 rail or drilled bench top.
A pedestal that preloads two 608 bearings (8 x 22 x 7 mm) 36.6 mm apart on a common vertical axis, giving a printed robot-arm shoulder/waist joint the moment stiffness people normally pay $100+ for a cross-roller bearing to get. 44 x 44 mm gusseted flange with four M4 clearance holes on a 32 mm square, 44 mm tall, 19 mm centre bore for an 8 mm shaft plus collars, and a slotted pinch collar with an M3 bolt and captured nut that takes the slop out of the upper press fit.
A print-in-place ball-and-socket gimbal for cameras, lidar pucks and sensor boards on a robot or drone frame: a Ø20 mm ball captured in a spherical socket with a 0.4 mm gap gives 360° pan and roughly ±33° tilt, and one M4 thumbscrew driven into a brass heat-set insert (5.5 mm bore) locks the angle without any springs or shims. The 50 x 34 x 5 mm base bolts down with four M3 screws on a 42 x 24 mm pattern, and the 26 x 26 mm top plate carries four M3 clearance holes on a 18 x 18 mm square; overall 50 x 34 x 48 mm.
A weather cap for a nominal 4x4 fence or deck post (88.9 mm actual) with a 91 mm square socket, 20 mm engagement and two M4 clearance holes so it screws down and won't blow off. Twin horns on opposite faces carry a cafe-string-light cable in an 8 mm wide, 10 mm deep slot; overall 127 x 97 x 50 mm with a hollow 50-degree pyramid roof that sheds water and prints support-free.
A bolt-clamped replacement slider/holder for a 25 mm shower riser bar, for when the molded plastic holder cracks and the maker only sells the whole $60 rail. A 38 mm split ring with 6.3 mm walls grips the bar via two M5x30 bolts with captured nut pockets, and a 10°-tilted tapered cradle (26.4 mm top, 22.8 mm bottom, open through the bottom so it drains) holds the hand shower. Overall 90 x 39 x 32 mm.
A clamp-on double hook that saddles the top edge of a frameless glass shower door — towel hook on the outside, loofah/razor hook on the inside, no drilling, adhesive or suction cup. The 13.6 mm slot with a raised grip pad takes 6–13 mm (1/4"–1/2") tempered glass, and an M4 heat-set insert (5.5 mm bore) plus an M4x16 screw locks it down; 76 x 43 x 26 mm.
A four-link cable drag chain with an integrated M3 mounting foot, printed fully assembled — no pins, no clips, no post-assembly. Each 32 mm link carries an 11 mm wide x 13 mm tall cable channel and an arc-slot bend limiter that stops the chain dead straight and allows 35 deg of bend, so the top run won't sag. Overall 170 x 29 x 16 mm; the foot takes two M3 screws on a 19 mm spacing.
A cable-tie-on bottle cage mount for bikes with no braze-on bosses: a 26 x 26 x 90 mm block with a 90-degree V groove that self-centres on round tubes from about 22 to 32 mm, and two M5 cage bolt bores on the standard 64 mm boss spacing with captured 8 mm hex nuts loaded from the side. Two 8 x 2.8 mm tunnels take 4.8 mm standard or 7.6 mm heavy-duty zip ties that wrap the tube and pull the groove down onto it.
A three-piece print-in-place cam cleat that jams 4–8 mm rope or paracord one-way for tarps, roof racks, awnings and van-life tie-downs — pull to tension, lift the line out to release. Base is 76 x 54 x 16 mm with four 5.5 mm M5 clearance holes on a 60 x 42 mm rectangle; the two toothed cams ride on 6 mm printed pins with retaining heads and are closed by 1.2 mm curved flexure springs, with 4.5 mm guide ribs fairleading the line in.
A 60-tooth GT2 timing pulley (2 mm pitch, 37.7 mm tooth OD, 41.7 mm flanges) with an 8.3 mm slip-fit bore for 8 mm shaft and a split-clamp hub tightened by a single M3 screw against a captured M3 nut. 22 mm tall with a 7 mm flanged belt land for 6 mm GT2 belt — the big reduction pulley you can't buy off-the-shelf in 8 mm bore.
Gusseted carriage block that bolts a standard T8 brass leadscrew nut (22 mm square M3 flange pattern, 8 mm screw) to a moving platform — for Z-axis lifts, camera sliders and small CNC gantries. 50 x 62 x 46 mm with a 9.0 mm leadscrew pass-through, four M3 flange holes and four M5 platform bolts on a 26 x 30 mm pattern.
A split collar that clamps onto a standard 1/2" NPT shower arm (21.3 mm OD pipe) with one M4 screw into a heat-set insert, carrying two 30 mm upturned J-hooks for a loofah, razor strap or bottle handle — no suction cups, no drilling tile. Collar bore is 21.8 mm, ring wall 3.5 mm, overall 60 x 38 x 18 mm; slide it on with the shower head removed, then pinch the 3 mm gap closed to lock it.
A 62 mm square, 19 mm tall adapter that lets a NEMA 17 stepper bolt into a machine face drilled for NEMA 23 — the base carries the 47.14 mm M5 pattern, the raised Ø52 tower carries the 31 mm M3 pattern with a 22.4 mm pilot register for the motor's centring boss. The hollow Ø30 core clears a shaft coupler, a 14 mm side window gives Allen-key access to the coupler set screw, and counterbores in the base bottom fully recess the four M3x20 motor screws so the adapter still seats flat.
A vibration-isolating NEMA 17 motor mount: the motor bolts to a floating 46 mm plate (31 mm square M3 pattern, 22.5 mm pilot-boss bore) that is joined to a 76 x 76 mm outer frame only by four Z-shaped flexure beams, so motor buzz never reaches the chassis or the gyro. The frame bolts down with four M3 screws on a 68 mm cross pattern; print it as shown (flat, no supports) and flip it in use so the motor plate floats 6 mm clear of the chassis, leaving room for the motor screw heads.
A print-in-place hinged tilt bracket for small 10–100 W solar panels, 140 x 60 mm with a 5 mm base plate and a 60 mm-tall detent post. The base bolts to a roof rail, van rack or shed wall with four M5 lag screws (5.5 mm clearance holes) and the panel wing takes four M5 frame bolts; a single M5 x 60 bolt through the post and quadrant fin locks the tilt at 15°, 30°, 45° or 60°, with strap slots on both plates for frameless panels.
A printed beam-flexure shaft coupler that joins a 5 mm stepper shaft (NEMA 17) to an 8 mm T8 leadscrew, with three 60°-indexed relief slots so it absorbs misalignment instead of binding the nut. 20 mm OD x 44 mm long, 5.3 mm and 8.6 mm bores, four M3 self-tapping grub screws (two per hub at 90°).
A 60 mm OD × 18 mm wide spoked drive wheel that slips onto any 5 mm motor shaft (NEMA 17, 37 mm gearmotor) and locks with an M3 set screw threaded into the 6.3 mm hub wall. The 8 mm × 2.5 mm rim groove seats a #64 rubber band as a tire, and 24 scallops in the flanges give traction if you run it bare — replaces the hub-and-tire set nobody stocks for one-off robot builds.
A split-clamp pillow block that carries two LM8UU linear bearings (15 mm OD x 24 mm) in line on an 8 mm smooth rod, with a centre rib that stops the bearings against each other and two M3 clamp screws that pinch the flanks so nothing walks out. The 60 x 44 x 35 mm body bolts down through four M4 clearance holes on a 40 x 34 mm rectangle, putting the rod axis 21 mm above the mounting surface.
An L-bracket that mounts a NEMA 17 stepper to 2020 aluminium extrusion: 54 x 40 mm base with two M5 T-nut holes on 20 mm centres, and a 54 x 50 mm vertical face carrying the 31 mm square M3 bolt pattern plus a 22.6 mm pilot bore for the motor's centring boss. Twin 5 mm gussets carry motor torque in the strong XY direction and sit outboard of the bolt heads so a hex driver still reaches all four screws; a pair of 6 x 3 mm slots above the bore takes a cable tie for the motor lead.
A U-bracket that slips over a cabinet door (fits panels up to 19.5 mm thick) and turns the inside face into a grocery-bag trash caddy — the bag handles drop into a 9 mm trough behind an upturned lip so they can't slide off. 50 mm wide with two optional screw holes for a permanent mount.
A no-screw C-clamp that slides onto a desk edge or shelf and hangs your headphones underneath on a wide 30 mm saddle. The wedged inner jaw self-tightens on tops from 20–30 mm thick, and the 14 mm hook mouth also takes a bag or lanyard.