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low gear ratios (25:1)

1474 Views 3 Replies 4 Participants Last post by  jwiger
I am designing a low speed(6mph) electric vehicle that will be used to transport loadings of about 400lb and will have total weight(loaded) of 1400lb. I will be using an electric motor with a 19 tooth spline from a golf cart and calculated I need a gear ratio of 25:1. However no rearend assemblies I can find are anywhere near this ratio. Does anyone know of a solution of how I can get such ratios or if such ratios exist? I know you can get large/low gear ratios with worm gear sets however I cannot seem to find any worm gear differentials.
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Simplest cheapest way is to use two manual transmissions, output of one going to the input of the other, then into a diff.

Lots of ranges to play with.....
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