How To Determine Newton Meter Force

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SUMMARY

This discussion focuses on calculating Newton meter force requirements and RPM for an electric motor in a specific application involving a shaft. The shaft has a diameter of 2 inches and a length of 6 feet, and it must lift a weight of 10 pounds over a distance of 7 feet in 6 seconds. Key calculations include determining RPM by dividing the travel distance by the shaft's circumference and calculating torque as the product of the shaft's radius and the lifting force.

PREREQUISITES
  • Understanding of torque calculations in mechanical systems
  • Knowledge of RPM and its significance in motor performance
  • Familiarity with the relationship between force, distance, and time
  • Basic geometry for calculating the circumference of a shaft
NEXT STEPS
  • Research the formula for calculating torque: Torque = Radius x Force
  • Learn how to calculate the circumference of a circle: Circumference = π x Diameter
  • Explore the relationship between RPM and linear speed in rotating systems
  • Investigate the specifications and performance characteristics of electric motors suitable for lifting applications
USEFUL FOR

Engineers, mechanical designers, and anyone involved in the design and specification of electric motors for lifting applications will benefit from this discussion.

Mr. Nice Guy
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Hello!

How do you calculate or determine Newton meter force requirement and rpm's for an electrical motor in the following example:

A device that utilizes a shaft that is 2 inches in diameter and 6 feet length. It needs to be able to lift 10 pounds and distance of 7 feet in 6 seconds. I need to know the formulas to make these calculations and the requirements needed for this application?

Thanks in advance for any assistance!

Mr. Nice Guy.
 
Last edited:
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RPM can be found by dividing the distance the mass must travel by the circumference of the shaft. The torque will be equal to the radius of the shaft times the force to lift the weight. I am unsure what you are asking for in the second part of your request.
 

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