Gears-Compound Gears Ratio

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					  GEAR RATIO OF A COMPOUND GEAR TRAIN.
   A compound gear train is one that has two or more gears attached to the same shaft. In
           actual fact it is a combination of two or more gear trains. See below.




                         In the example above the gear ratio will be




                                           16:1
                   Gear "D" will turn once for every 16 turns of gear "A"




Notice in the compound gear train above that four gears are used and that gears "B" and
"C" are fixed together on the same shaft.

When the driver gear "A" makes one complete turn gear "B" turns 1/4 of a full rotation.
This also means that gear "C" also turns 1/4 of a full rotation.

Gear "D" will turn through 1/16(1/4 X1/4) of a turn. The gear ratio for this compound gear
train is 16:1

				
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