SP17: Rolling Ball Clock

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This is my largest and most interesting clock. It is powered entirely using 3/4" steel balls. The winding mechanism lifts balls back to the top to run for another 38 hours.

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This clock breaks a lot of records of mine:

It is my largest clock

It is my loudest clock

It is my most impressive clock

It uses the most filament, 5kg

It took the most design effort

It is the most beautiful

It gets the most attention

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Despite its size, the clock can be printed on most standard 3D printers including the Prusa MK4 (250x210mm) and Ender 3 (220x220mm). Print time on a SnapMaker U1 is around 120 hours.

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The non-printed bill of materials is relatively small:

125 3/4" (19mm) chrome steel balls

28" 1/2" EMT conduit

100 #6x3/4" (M3.5x19mm) wood screws

7 M3x8mm socket head screws

40" (100cm) 3mm stainless rod

20" (50cm) 1/16" or 1.5mm music wire

1 608 skateboard bearing (8x22x7mm)

2 623RS bearings (3x10x4mm)

Parts kits for everything except the steel balls and EMT conduit will be available on my Etsy store soon.

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The overall size is 9.15" (23cm) wide, 10.75" (27cm) deep, and 33.5" (85cm) tall. ​​