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Gear ratio is the speed reduction/increase between input and output shafts. It determines torque multiplication and shaft speeds.
Wzór
Ratio = N_input / N_output = N_driven / N_driver = T_output / T_input
Przewodnik krok po kroku
- 1Ratio = N_input / N_output = N_driven / N_driver = T_output / T_input
- 2Spur gears: ratio = number of teeth on driven / number on driver
- 3Power is conserved: P = T × ω
Rozwiązane przykłady
Wejście
Input 1800 rpm, output 600 rpm
Wynik
Gear ratio = 3:1 (3× speed reduction, 3× torque increase)
Power unchanged
Częste błędy do unikania
- ✕Confusing speed ratio with force multiplication
- ✕Neglecting friction losses in extended calculations
Często zadawane pytania
Can any two gears mesh together?
No, they must have same pressure angle and pitch. Teeth must fit smoothly without interference.
How is efficiency handled?
Mechanical power loss (5-10%) converts to heat; P_out = P_in × η.
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