Gear ratio calculator

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Result

Gear ratio3 : 1
Output speed483.3 rpm
Output torque87.3 N·m
Input power4.555 kW

Step-by-step solution

Ratio and speed

i = N2/N1 = 3
n2 = n1/i = 483.3 rpm

Torque

T2 = T1·i·η = 87.3 N·m
P = T·2πn/60 = 4.555 kW

Key formulas

Meshing gears
n1·N1 = n2·N2
Torque
T2 = T1·(N2/N1)·η
Power
P = T·ω, ω = 2π·n/60
Compound train
total ratio = product of the stage ratios

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