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Gear ratio is the speed reduction/increase between input and output shafts. It determines torque multiplication and shaft speeds.
Formel
Ratio = N_input / N_output = N_driven / N_driver = T_output / T_input
Steg-för-steg-guide
- 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
Lösta exempel
Ingång
Input 1800 rpm, output 600 rpm
Resultat
Gear ratio = 3:1 (3× speed reduction, 3× torque increase)
Power unchanged
Vanliga misstag att undvika
- ✕Confusing speed ratio with force multiplication
- ✕Neglecting friction losses in extended calculations
Vanliga frågor
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.
Redo att beräkna? Prova den kostnadsfria Gear Ratio-kalkylatorn
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