Free Engineering Tool #086
Gear Ratio Calculator
Kalkulahin ang gear transmission ratio mula sa mga bilis, bilang ng ngipin, o diameters. Sumusuporta sa multi-stage gear trains na may hanggang 5 stages. i = Z2/Z1 = n1/n2.
i = Z₂/Z₁
Multi-Stage
Bilis & Torque
Results
Total Gear Ratio
—
Output Speed
—
Output Torque (η≈97%/stage)
—
Per-Stage Ratios
—
Gear Mesh (First Stage)
Single-Stage Gear Ratio
Multi-Stage Total Ratio
Output Torque
Kung saan η ay efficiency per stage (karaniwang 97–99% para sa spur gears).
Example — Two-Stage Gearbox
Given: Stage 1: Z₁=18, Z₂=72; Stage 2: Z₁=20, Z₂=60; Input = 1500 RPM, 15 kW
i₁ = 72/18 = 4.0, i₂ = 60/20 = 3.0
i_total = 4.0 × 3.0 = 12.0
n_out = 1500 / 12 = 125 RPM
T_out = 9549 × 15 / 125 × 0.97² = 1080 N·m
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