The file 'Worm Drive Gears 3D Printer Model' is (stl) file type, size is 402.4KB.
Edit: I would recommend printing this version that turns the screw vertical and cleans up the stl files:
http://www.thingiverse.com/thing:2303403
Thanks dnewman!
30 to 1 worm drive reduction gears. 3 parts. Could be used in a clock in addition with a 2 to 1 reduction due to ratio. The worm wheel is helical.
base.stl | 335.6KB | |
screw.stl | 1.1MB | |
spur.stl | 1.4MB |