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Gear ratio is the speed reduction/increase between input and output shafts. It determines torque multiplication and shaft speeds.
Formule
Ratio = N_input / N_output = N_driven / N_driver = T_output / T_input
Stapsgewijze handleiding
- 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
Uitgewerkte voorbeelden
Invoer
Input 1800 rpm, output 600 rpm
Resultaat
Gear ratio = 3:1 (3× speed reduction, 3× torque increase)
Power unchanged
Veelgemaakte fouten om te vermijden
- ✕Confusing speed ratio with force multiplication
- ✕Neglecting friction losses in extended calculations
Veelgestelde vragen
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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