# Maximum Stress/Torque for rotating shaft

• icycoolguy
In summary, the conversation discusses the maximum horsepower that can be transmitted by a 1.5" shaft with a yield strength of 80-90 ksi, neglecting limitations of keys or gear reducers. The equations for torque and force are given, and the conversation suggests finding the maximum shear force using an equation that relates torque and maximum shear stress in a rotating shaft.
icycoolguy

## Homework Statement

Given a 1.5” output shaft, a 80-90 ksi yield strength.
Neglecting limitations of keys or gear reducer what is the maximum HP that could be transmitted by the 1.5” shaft

## Homework Equations

Torque = (63025*H)/n H is HorsePower and n is RPM

## The Attempt at a Solution

If I can find the maximum force then the maximum torque/HP can be calculated using the above equations. I m not sure how to calc the max shear force using the given data.

You need an equation that relates torque and maximum shear stress in a rotating shaft. That equation should be given (or derived) in your class. If that's not the case (which would be very odd), you can always try Google.

Last edited:

## What is maximum stress/torque for a rotating shaft?

The maximum stress/torque for a rotating shaft refers to the highest amount of force or twisting moment that a shaft can withstand before it fails or breaks. It is an important factor to consider in the design and operation of rotating machinery.

## How is maximum stress/torque calculated for a rotating shaft?

The maximum stress/torque for a rotating shaft can be calculated using various engineering equations and principles, such as the maximum shear stress theory or the von Mises stress theory. These calculations take into account factors such as the material properties of the shaft, its dimensions, and the applied load.

## What factors can affect the maximum stress/torque for a rotating shaft?

The maximum stress/torque for a rotating shaft can be affected by several factors, including the material properties of the shaft (such as strength and ductility), the dimensions and geometry of the shaft, the type and magnitude of the applied load, and the speed of rotation.

## Why is it important to know the maximum stress/torque for a rotating shaft?

Knowing the maximum stress/torque for a rotating shaft is crucial for ensuring the safe and efficient operation of rotating machinery. It helps engineers and designers select appropriate materials and dimensions for the shaft, as well as determine the maximum load and speed that the shaft can withstand without failure.

## How can the maximum stress/torque for a rotating shaft be improved?

The maximum stress/torque for a rotating shaft can be improved by using stronger and more durable materials, increasing the diameter or changing the shape of the shaft, and reducing the applied load or rotation speed. Proper maintenance and lubrication can also help improve the maximum stress/torque for a rotating shaft.

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