I have three sizes of gears with 14, 34, and 84 teeth respectively. I need an exact 1:60 gear ratio. The problem I am finding is that 14:34 and 34:84 are very close to the same value. 14 and 84 is 1:6, but without a 1:10, that doesn't get me far. The closest I can get is 7:612 (1:87.42857....) I would greatly appreciate some help here. Assume I have unlimited gear and space. For those of you wondering, I'm attempting to build an accurate K'nex clock.