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A split clamp collar that grips the 37 mm round body of a JGB37-520 / 37D class gearmotor (37.3 mm bore, 23 mm of grip, two M3 pinch bolts with captured nuts) on a 78 x 56 x 7 mm flange that presents the standard NEMA 17 31 mm bolt square as four M3 heat-set inserts, so a DC gearmotor drops straight onto a chassis already drilled for a stepper. Two M5 clearance holes 67 mm apart on the ears bolt it flat to a 2020 extrusion, and the motor gearbox face registers against a 1 mm deep seat around the 26 mm shaft opening.
A no-drill C-clamp that hooks over the front lip of a K-style rain gutter and carries a security camera or its solar panel on a 13 mm long 1/4-20 slot, so renters and anyone with aluminium soffits never touch the fascia. The 26 mm throat is closed by two M4 screws in 5.5 mm heat-set insert bores (use M4 x 30), gripping lips and beads from 5 to 24 mm deep; overall 74 x 44 mm with a 30 mm wide jaw, and it prints with zero overhangs because the whole profile is extruded along the gutter run.
A screw-clamped replacement tine for a dishwasher rack: a split saddle grips any coated rack wire from 4.6 to 6.6 mm and carries a 48 mm tapered fin that holds plates apart where the original tines snapped or rusted through. 59 x 21 x 36 mm, closed by two M3 x 20 stainless screws into M3 heat-set inserts (4.0 mm bores), with six drain cutouts; print in PETG.
A closed-loop encoder tower that bolts to the rear face of a NEMA 17 stepper (42.3 mm plate, 31 mm M3 pattern, 24 mm boss clearance) and holds an AS5600 magnetic encoder board 26 mm above the faceplate — right over a 6 mm diametric magnet glued to a standard 24 mm shaft. The deck carries eight 2.9 mm M2.5 holes on 19 mm and 29 mm square patterns so most breakout boards land centred, with a 12 mm sensor window and 12 mm side openings for the cable and a hex key.
A split-band clamp that grips a standard round door knob (50–56 mm, eleven internal 1.25 mm grip ribs) and adds a 95 mm lever arm so the door opens with a forearm, elbow or closed fist instead of a twisting grip. One M4 bolt through the 4.5 mm clearance ears pulls the 4 mm split shut onto a captured M4 nut; band is 22 mm tall, arm 14 mm thick, overall 139 x 63 mm, and it prints flat with the lever load in the XY plane.
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 clamp-on shelf that straddles the top bezel of a monitor and gives a webcam, action cam or small light a solid 41 mm deep platform with a 6.8 mm obround slot for a 1/4-20 tripod screw (14 mm of fore/aft travel) and a 3 mm anti-slide lip. The 18 mm wide throat swallows panels from about 5 mm to 18 mm thick and locks with an M4 x 25 screw into an M4 heat-set insert (5.5 mm bore) in the rear jaw, so nothing presses on the screen; two M3 clearance holes in the deck take a light arm or adapter plate. Overall 78 x 34 x 42 mm, printed as a single profile with no overhangs or supports.
A C-clamp that grips a desktop 12–30 mm thick and holds a vertical 2020 extrusion post at the desk edge, so you can mount a lamp, mic boom, webcam or a small shelf without drilling the desk. 99 x 38 x 30 mm body with a 20.4 mm square socket 40 mm deep (two M5 clearance holes for T-nuts lock the post) and two M4 heat-set inserts in the lower jaw for the M4x30 clamp bolts; the flat 38 x 30 mm upper jaw pad bears on the desk surface and the rear face registers flush against the desk edge. Prints flat on the plate, no supports.
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 print-in-place rotary output stage for a NEMA 17 stepper joint: a Ø52 mm race bolts to the 31 mm square M3 faceplate pattern and sits over the 22 mm pilot boss, while a captured rotor clamps to the 5 mm shaft (Ø5.3 bore, M3 grub screw in a radial heat-set insert) and carries the arm on four M3 heat-set bosses in a 16 mm square. The printed race takes the radial and moment load that would otherwise destroy the motor's own bearings; total height 25.5 mm, two pieces, no assembly.
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 clamp-on comb that grips the back edge of a desk or shelf (tops up to 27 mm thick) and drops five cables down in separate channels instead of one tangled bundle — two 10 mm channels for laptop/power bricks and three 7 mm channels for USB and audio leads, each with a snap-in mouth so cables push in from the side and stay put. 57 mm wide, 42 mm tall, no drilling: an M4 brass heat-set insert (5.5 mm bore) in the lower jaw takes an M4 x 20–25 bolt that jacks up against the underside of the desktop.
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 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.
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 one-handed reading aid: slip your thumb through the 22 mm ring and the two 29 mm wings press both page blocks flat so a paperback stays open by itself. Ramped wing tips slide under the pages without creasing them; 80 mm wide overall.
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.
An 80 mm L-block that holds two boards at a true 90° while glue sets, with open windows so a spring clamp reaches straight through to the workpiece and a rounded corner relief for squeeze-out. Two 4.5 mm holes let you screw it down to a bench or assembly board.