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input/output rpm ratio

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crosstown

Mechanical
Joined
Jan 15, 2008
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5
Location
US
I have an electric motor turning 1775 rpm, driving a speed/torque reducer with a 37.5-1 ratio. There is an 8 inch pulley on the output shaft which steps up to a 12 inch pulley on my conveyor headspool. What are the rpms on my 12 inch sheave and what is the rule of thumb to figure this out next time? thank you
 
1775/(reducer ratio)*(driveR sprocket pitch diameter)/(driveN sprocket pitch diameter) = RPM at conveyor head shaft
 
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