Cara Menghitung Gear Ratio
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Gear ratio is the speed reduction/increase between input and output shafts. It determines torque multiplication and shaft speeds.
Rumus
Ratio = N_input / N_output = N_driven / N_driver = T_output / T_input
Panduan Langkah demi Langkah
- 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
Contoh Terpecahkan
Masukan
Input 1800 rpm, output 600 rpm
Hasil
Gear ratio = 3:1 (3× speed reduction, 3× torque increase)
Power unchanged
Kesalahan Umum yang Harus Dihindari
- ✕Confusing speed ratio with force multiplication
- ✕Neglecting friction losses in extended calculations
Pertanyaan yang sering diajukan
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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