pic: 2004 TechnoKat gearbox

[Andy Baker]

Originally Posted by Andy Brockway

As always, a very nice design. I was hoping you might change your mind about sharing the fisher adapter design but I completely understand.

How much of the gearbox will you be sharing? Is the shifter the same internal rod with hex shaft? Gear types and ratios?

The FP adapter design worked out well for us, until we got to IRI. The needle bearing on the output shaft found it's breaking point. This is a planetary assembly that we want to sell in the future, but it needs some improvements before that is done.

I do plan on putting together a descriptive paper on this, just not all of the print details. We used the same internal hex shaft shifter. Here are the ratios used:

CIM motor: 18 tooth, 32 dp
Intermediate shaft: 64 tooth, 32 dp (mates w/ CIM gears), 1/4 face

Low gear: 15 tooth, 20 dp, 14.5 p.a. 3/8 face

High gear: 28 tooth, 20 dp, 14.5 p.a. 3/8 face

Shifter/output shaft:

Low gear: 48 tooth, 20 dp, 14.5 p.a. 3/8 face

High gear: 35 tooth, 20 dp, 14.5 p.a. 3/8 face

12 tooth, size 35 sprocket (qty.2)

Andy B.