Let R and r are the radii of the pitch circle of two sprockets having teeth T and t, respectively.
L is length of the chain
C is centre distance between sprockets = K · p
Example 15.6: For reduction of speed from 250 to 100 rpm, a chain drive is used. Calculate the number of teeth on the driven sprocket if number of teeth on driven sprocket is 20. Pitch circle diameter of the driven sprocket is 650 mm and centre distance between sprockets is 100 mm. Also, determine the pitch and length of the chain.
Solution:
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