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  • July 14, 2026

How to match speed and torque for your application-F series gearbox


H1: F Series Gearbox Ratio Calculation: How to Match Speed and Torque for Your Application

H2: Why Proper Ratio Selection Matters for Your Equipment

Choosing the wrong gear ratio for F series parallel shaft gearbox can lead to motor overload, premature wear, or insufficient torque. Whether you are selecting a parallel shaft speed reducer for a conveyor or an industrial mixer, the gear reduction calculation must match both speed and torque requirements

H2: Step-by-Step Ratio Selection Process

Step 1 – Determine Required Output Speed

Calculate based on your machine’s operational needs (e.g., conveyor belt speed, mixer RPM).

Step 2 – Calculate the Gear Ratio

Using ratio = input RPM ÷ output RPM. For a 1450 r/min motor driving a conveyor at 25 r/min:

i = 1450 ÷ 25 = 58:1

Step 3 – Verify Torque Capacity

F series offers output torque from 200 Nm to 18,000 Nm. Ensure the selected F series gearbox ratio

 delivers torque exceeding your load requirements with at least 20% safety margin.

Step 4 – Select the Right Frame Size

F series provides 11 frame sizes from F27 to F157, covering 0.12 kW to 200 kW.

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