A Gearus Line

A Gearus Line is a gear-matching puzzle. The object is to place the six oddly-shaped gears over the four diamond-shaped shafts such that they rotate freely. When gears are placed incorrectly, then the final gear won't fit, or the rotation will block. The number of combinations may seem huge. However, some clever thinking can reduce this number significantly. The net acceleration of the three gear pairs should be zero, as the red shaft spins at the same speed as the light-green one. So any acceleration from one or two gear pairs should be compensated by the third pair.

Watch the YouTube video.
Read at the Shapeways Forum.
Read more at the Non-Twisty Puzzles Forum.

Please order a 3D-printed do-it-yourself puzzle kit from Shapeways at this page (check with Oskar about screws and stickers), or contact Oskar directly if you are interested in obtaining a fully colored, stickered and assembled sample of this puzzle.