learn.howToCalculate
learn.whatIsHeading
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
Trinn-for-trinn 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
Løste eksempler
Inndata
Input 1800 rpm, output 600 rpm
Resultat
Gear ratio = 3:1 (3× speed reduction, 3× torque increase)
Power unchanged
Vanlige feil å unngå
- ✕Confusing speed ratio with force multiplication
- ✕Neglecting friction losses in extended calculations
Ofte stilte spørsmål
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.
Klar til å beregne? Prøv den gratis Gear Ratio-kalkulatoren
Prøv selv →