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Army Leather Heli Ski
• A gear system with pairs of gears mounted on the same shaft • Produce large speed changes (100 : 1) • Provide multiple outputs with different speeds and directions Compound Gear Example Gear Ratio/ MR • The multiplier ratio (Gear Ratio) for the first pair of meshing teeth is • The multiplier ratio for the second pair of meshing teeth is • The total multiplier ratio is calculated by multiplying both ratios: Ratio = 4 : 1 x 6 : 1 = 24 : 1 Total Short cut For a compound gear train the following is true: Gear movement ratio = product of number of teeth on driven divided by theproduct of number of teeth on driver From previous example: Gear Ratio = 80 x 60 = 4800 = 24 = 24 : 1 20 x 10 200 1 Compound Example SR • The speed ratio for the first pair of meshing teeth is • The speed ratio for the second pair of meshing teeth is • The total speed ratio is calculated by multiplying both ratios: Driver/Driven = 20/80 = 1:4 Driver/Driven = 10/60 = 1:6 1/4 x 1/6 = 1:24 Note: The same short cut can be taken with movement ratio, can be taken with the speed ratio D C A B Practice In the compound train shown below wheel A is rotating at 100 rpm
Black Friday 2020. Black Friday 2020: Door Busters
Modell:EB1S Schwarz
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