A real mechanical clock, printed. A weight on a ball chain turns the centre wheel once an hour, and the train drives a tourbillon at the bottom: a cage that carries the balance, the lever and the escape wheel and turns once a minute, so it is also the seconds hand. Inside it the escape pinion rolls round a fixed ring, the escape wheel lets one tooth through per second, and the lever passes each push on to the balance, which swings once a second on a printed hairspring. You wind it by pulling the chain, and it keeps running while you do. Four timing screws in the balance set the rate. Every part prints without supports.
Free for personal use under CC BY-NC 4.0: print it, remix it and share it with credit to Shapekit. Please don't sell the files or the prints.
Every part as you print it. Pick colours to see what your filament will look like.
Drag to rotate · scroll or pinch to zoom
Every STL is already placed the right way up. Download them all at once, or one by one.
Carries the back ends of the arbors, the bearing for the tourbillon carriage, the boss the winding sprocket turns on and the click. Three legs hold the clock 45 mm off the wall; the top one has a keyhole for a screw.
Holds the front ends of the centre and third arbors, the stud for the minute wheel, the ring and the bridge. The three posts for the dial are printed on it.
Keeps the plates 16 mm apart. An M3 × 25 goes from the front plate through the pillar into the back plate.
33 pockets for the ball chain on the back of the centre arbor: the weight pulls it round once an hour. Its shaft goes through the back plate and keys into the centre wheel; an M3 × 40 along the axis holds them together.
16 pockets and a ratchet. It turns on the boss of the back plate one way only: pull the chain down on the left and the weight goes up, while it keeps driving the clock.
Stops the winding sprocket from running back. It turns on an M3 × 8, and its thin arm, bent by a post on the back plate, is its spring.
96 teeth. It turns once an hour; its long arbor runs in the front plate and carries the cannon pinion and the minute hand.
A 12-tooth pinion driven by the centre wheel and a 90-tooth wheel that drives the carriage pinion. It turns on a 3 mm steel rod.
Between the third wheel and the front plate, so the wheel stays in line with the carriage pinion.
On the carriage rod, between the back bearing and the carriage pinion.
12 teeth. Its tube passes through the front plate and the hex at its end keys into the cage base, so the whole cage turns with it, once a minute.
60 teeth on the inside for the escape pinion to roll round, a seconds scale on the front and three tabs that screw it to the front plate (M3 × 8).
The bottom of the tourbillon cage: posts for the middle arms and for the escape and lever rods, two banking pins for the lever, and a counterweight that balances the cage on its axis.
15 teeth that roll round the fixed ring: while the cage turns once, the escape wheel turns four times. The escape wheel slides onto its hex.
15 club teeth. It lets one tooth through for every swing of the balance.
The Swiss lever: two pallets lock and release the escape wheel, and the fork at the other end is moved by the impulse pin of the balance. The round weight on one side balances it on its pivot.
Carries the impulse pin under the balance. Two small pins key it into the balance hub.
On the cage rod, between the cage base and the lower bearing of the balance.
Hold the top ends of the escape and lever rods and the pillars of the cage top. The pointer on the edge is the seconds hand.
A 74 mm balance on two 623 bearings. Four M3 × 10 timing screws in the rim set the rate: turn them out to slow the clock down, in to speed it up.
Between the two bearings in the balance hub.
A flat spiral, one 0.6 mm line and 4 mm high. The inner ring presses onto the balance hub and the stud at the outer end goes into the cage top. Its length is worked out for a one-second swing in PLA.
Closes the cage: three pillars down to the middle arms, the hole for the hairspring stud and the boss on the balance's upper bearing.
On the cage rod, between the cage top and the bridge bearing.
Spans the tourbillon and holds the front bearing of the carriage. Two M3 × 16 hold it to the front plate.
14 teeth on the centre arbor. The slit tube grips the arbor, so the hands turn with the clock, but you can still turn them by hand to set the time.
42 and 12 teeth, on a steel stud in the front plate. With the hour wheel it turns the hour hand 12 times slower than the minute hand.
48 teeth on a tube that turns on the cannon pinion and carries the hour hand.
A ring 124 mm across, on the three posts of the front plate.
Hour bars and minute notches that lie on the dial. The three M3 × 10 dial screws hold both.
Pushes onto the tube of the hour wheel.
Sits on the hex of the cannon pinion, held by an M3 × 8 and a washer.
Runs in the loop of the ball chain and carries the weight.
Holds the pulley on an M3 × 16 with a nut. Hang the weight on its eye.
For a 0.4 mm nozzle. Filament amounts are estimates for these settings.
Nothing needs supports. Print the cage base, middle arms, cage top, escape pinion and wheel, lever, roller and balance at 100% infill, because they are balanced by weight. Clean any elephant's foot off the gears and the bearing seats.
Press a 623 bearing into the back plate from the front and one into the bridge. Push the 26 mm rod into the back plate where the third wheel goes and the 16 mm stud into the front plate for the minute wheel.
Slide the winding sprocket onto the boss on the back plate, ratchet towards the plate, and fit the click with an M3 × 8 so its arm rests against the post. Push the shaft of the drive sprocket through from behind.
Put the centre wheel on the hex of the drive sprocket and screw them together with the M3 × 40. Put the third wheel on its rod. Slide the carriage spacer and the carriage pinion onto the 68 mm rod and push it into the back bearing. Stand the four pillars on the back plate and screw the front plate on with four M3 × 25.
Screw the ring to the front plate. Press the cage base onto the carriage rod so its hex goes over the carriage pinion. Push the two 20 mm rods into the base, slide on the escape pinion and the escape wheel, and the lever. Screw the middle arms onto the three posts (M3 × 8).
Press the two bearings into the balance with the spacer between them and put in the four timing screws, all equally deep. Slide the balance spacer and the roller onto the rod, then the balance, so the impulse pin goes into the fork. Press the hairspring's inner ring onto the hub and screw the cage top onto the middle arms with the stud in its hole.
Put the bridge spacer on the rod and screw the bridge on (2 × M3 × 16). The cage should turn freely and stay wherever you leave it; if one side always ends up at the bottom, stick a little weight on the other side.
Push the cannon pinion onto the centre arbor, put the minute wheel on its stud and the hour wheel on the cannon pinion. Screw the dial and the chapter ring onto the posts (3 × M3 × 10). Press the hour hand onto its tube and fit the minute hand with an M3 × 8 and a washer.
Hang the clock on a screw in the wall and check that it hangs straight. Lay the chain over both sprockets, with the pulley and the weight in the loop on the right and the small weight in the loop on the left. Turn the hairspring's inner ring on the hub until the impulse pin sits in the middle of the fork when the balance is still, then give the balance a gentle swing. To wind, pull the chain down on the left.
Compare with your phone after a day. If the clock gains, turn all four timing screws out by the same amount; if it loses, turn them in.
The weight hangs on a chain: hang the clock on a solid wall and keep small children away from the weight.
A 7-cylinder radial with a master rod, six link rods and a 34 cm propeller. Turn the crank and all seven pistons move.
View and download
A cross-plane V8 with a gear-driven camshaft and sixteen moving valves. Turn the handle and watch it run.
View and download
Eight Theo Jansen legs and an N20 gear motor on two AA batteries. It walks across your desk by itself.
View and download
A working desk fan shaped like a car turbocharger, with a speed knob in the base.
View and download
A turbofan with 20 swept blades. Fits the Turbo Desk Fan's base and prints without supports.
View and download
A fluted planter for a 12 cm plant, with a hidden 0.6 litre reservoir and a float that shows the water level.
View and download
A sturdy headphone stand with a bayonet base, a cushioned hanger, an earbud tray and a cable hook.
View and download
Two small drawers and a wide one, with drawer stops and clip-on handles. Stack or link as many as you like.
View and download
Plug the back in at 55, 65 or 75 degrees. Fits phones and tablets in a case, with a slot for the charging cable.
View and download
A hanging seed feeder with a twist-lock tube, a perch ring and a roof that slides up to refill.
View and download
Pen cups, a scissor slot and a tray on a base that spins smoothly on 6 mm airsoft BBs.
View and download
A hand-cranked 5:1 planetary gearbox with herringbone teeth. Clicks together and prints without supports.
View and download
Lifts your screen about 12 cm at a 20° tilt. Fits 11 to 16 inch laptops; the cross bars wedge in, no screws.
View and download
Rolls any spool from 250 g to 3 kg on four 608 skate bearings, with a filament guide. Any hub size.
View and download
A 4 × 4 baseplate with eight stackable bins that fill it. Gridfinity-compatible, no supports.
View and download
Two baffles and an exit ramp tumble your dice into a tray with a felt recess. No glue, no supports.
View and download
Two AA chutes and one AAA chute. The bottom battery rolls onto a tray, the next drops down.
View and download
Two number cubes show every date, three bars show the month. With a stand that hides the spare bars.
View and download
Put your own photo in a phone case, lamp shade or lithophane, right in your browser.
Open the makers