Team Kaizen Build Diary

[Ocracoke]

The gearing for the Scythe wasn't meant to be as high as it is. I was originally meant to have a 19T pinion gear but it turned out that the engineers couldn't get one so offered me a 18T or a 20T. Since the 18T didn't come with a 12.7mm bore, I had to get a 20T. It could have been higher but at the time, I only had the equipment for a 10mm bore and the biggest drive gear with a 10mm bore was a 90T. 90/20 = 4.5:1

Kaizen used a 3:1 ratio but that was when I was first experimenting with gearboxes like this (I'll be reusing that assembly for Azriel with different gearing). Ultimately, with the power of the motor driving the Sycthe (around 2.3HP peak), I took a slightly educated guess as to wherever it would swing given the heavy weight on the end.

The planned two stage box is going to be slightly more complex but not that much more so. A 20T motor pinion to a 70T gear to give 3.5:1 and then that gear connected to another 20T gear to the 90T gear to give 4.5:1, multiply that together to make 15.75:1. I'll try and work out the maths behind it soon enough.