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Author Topic: Final drive gears  (Read 81 times)

peterL

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Final drive gears
« on: 09 July 2021, 08:27:25 am »
Schoolboy maths, the Interweb Google thingy, and a total lack of knowledge of chains and sprockets, leads me to the conclusion that a 60t sprocket is about 250mm diameter, and a 70t somewhere about 285mm.

Am I somewhere in the ball park for the purposes of trying to mock up a rear drive chain and motor set-up with a torque converter?

Peter

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RhysN

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Re: Final drive gears
« Reply #1 on: 09 July 2021, 08:50:05 am »
A 70 tooth for 40 series chain actual measurement is 290 mm. Don't forget that chain needs space on the outside. (Don't ask how I know that :) )

peterL

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Re: Final drive gears
« Reply #2 on: 09 July 2021, 12:52:25 pm »
Many thanks Rhys, 

and yes, I had  thought about the chain, I just needed to make a ply ring to mock up on a 1" dowel to see how it all fits, but didn't want to find that I misunderstood  the 1/2" chain spacing, and get it seriously wrong at an early stage.

I'm used to a shaft drive🙂
Peter
« Last Edit: 09 July 2021, 01:00:27 pm by peterL »

RhysN

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Re: Final drive gears
« Reply #3 on: 09 July 2021, 05:00:28 pm »
I have had one of those too, mine was one of 3 in NZ, built by me.