Update 20-Apr-21 Added hands_spade_met.stl. It is recommended to start with the standard 4.2 day versions to get your clock running reliably first before attempting the optional files. The files are described in addendum_SP2_2021_Jan.pdf.

Update 05-Jan-21 Added optional enhancements for longer runtimes of 6.4 days or 7.5 days. Update 15-Dec-20 Refreshed pallet_met.stl to remove a small occlusion in the arbor hole. It is one solid object now so it should be stronger. The old versions had a small gap in one of the support posts that created a weak spot. Update 19-Oct-20 Refreshed back_frame_lower_imp.stl and back_frame_lower_met.stl with modified versions. There are no changes for the imperial version. This only applies if building the metric version of the clock. The assembly notes correctly list the 10mm sizes. The previous versions accidentally had 8mm diameter pendulum support bearings, but experiments showed that 10mm diameter bearings have lower friction. Update 15-Oct-20 Replaced back_frame_upper_met.stl and front_frame_upper.stl with newer versions. The printed part appears strong enough if printed with 10 perimeters, although the metal part is preferred. Update 06-Oct-20 Added gear8_shaft.stl to replace the 5/16' brass fabricated metal part if desired. They are still available for download as individual files by scrolling below the main description and expanding the 'Object Parts' section. Note regarding updated files: STL files that get updated after the initial release do not always get added to the ZIP file. Parts kits are available at or you can source the items locally (Amazon, eBay, Ace Hardware, etc.) if you prefer. Use the forum at to discuss clock making topics or assembly issues. Go to to download the latest assembly guide. They mainly consist of music wire for the arbors, bearings, common sized wood screws, fishing line, and filler for the weight shell. The design includes both metric and imperial sized components to support parts available in your country. Total print time is 150 hours using 1.3kg of PLA filament. A future scaled version is planned that will fit a Prusa Mini (180x180x180mm) or similar sized machine.Ī few hidden non-printed parts are required to minimize friction and achieve the long runtime. The pictures show the size of this clock next to my other much smaller clock design. The clock is nearly 20 inches (0.5m) tall while fitting the print volume of a Prusa MK3S (210x250x210mm) or Creality Ender 3 (220x220x250mm). The gear tooth profile is a new style that prints cleaner and the escapement has been redesigned to give more consistent printed results. Nearly every part has been optimized for 3D printing instead of just porting an old style brass design. Runtime is more than 4 days and I think it has a nice symmetrical look. The deadbeat escapement is accurate to around 1-2 minutes per week. The primary goals for this clock were to be accurate, functional, and nice looking.

The escapement is up front and the gears are very visible.Ī video of the clock in operation can be found at SP2: This is my largest and most impressive 3D printed wall clock.

3d clock