How to lower shaft speed rpm

if i put 10 tooth sprocket on the shaft that spins 1750, add chain. then put 100 tooth sprocket on a second shaft, use the chain to connect, would it get 170 rpm on second shaft, or am i thinking wrong?



thank you

It is very simple.

Use the following formula:

N1 X T1 = N2 X T2 , Where,

N1=RPM of 1st shaft [drive shaft]
T1=Sprocket teeth on first shaft [Drive shaft]
N2=RPM of 2nd shaft [driven shaft]
T2=Sprocket teeth on second shaft [Driven shaft]

We have to find out N2 (RPM of 2nd shaft [driven shaft])

N1 X T1 = N2 X T2

N2 = N1 X T1 / T2

N2 = 1750 X 10 / 100 = 175 RPM

If you want to reduce it to 170 RPM , then, you have to find out T2

N1 X T1 / N2 = T2

T2 = 1750 X 10 /170 = 102.94 ~103 teeth.

Check if it is available as a standard sprocket or else you have to go for tailor made sprocket.

You can select T1 & T2 in such a way that you can get standard pair of sprockets using the same formula.

you didn't mentioned what kind of ECU you are using! because just in case you have a computer that have an laptop interface you can go in to the basic settings and change the idle speed, that is given that you may have a idle valve that is controlled by the ecu. so please don't take it to heart but to have a more specific answer you have to give a bit more details

Close.
10:100 = 175 : 1750