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## Main Question or Discussion Point

Hi all,

I have a the following problem to solve fairly quickly, I need to calculate the required input torque to my gearbox and pump

Gearbox output torque - 0.12348Nm

Gearbox output speed - 80 rpm

Gearbox input speed - 4 rpm

Gearbox (compound gears) Gear A, driver = 100 teeth, Gear B, driven = 20 teeth, Gear C, driver = 80 teeth and Gear D, driven = 20 teeth

Gearbox Ratio 1:20

What is the input torque?

I have a the following problem to solve fairly quickly, I need to calculate the required input torque to my gearbox and pump

Gearbox output torque - 0.12348Nm

Gearbox output speed - 80 rpm

Gearbox input speed - 4 rpm

Gearbox (compound gears) Gear A, driver = 100 teeth, Gear B, driven = 20 teeth, Gear C, driver = 80 teeth and Gear D, driven = 20 teeth

Gearbox Ratio 1:20

What is the input torque?