Machine Design Help - Calculate Load & Shaft Size

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SUMMARY

The discussion focuses on calculating the load and determining the appropriate shaft size for a machine designed to classify products using a cylindrical sieve. The machine features a 50mm diameter shaft, 1600mm long, rotating at 900 RPM, with paddles angled at 45 degrees. The product density is specified as 800 kg/m³. Key calculations involve assessing the load on the shaft due to the paddles and the impact of product density on motor requirements.

PREREQUISITES
  • Understanding of mechanical load calculations
  • Familiarity with shaft design principles
  • Knowledge of motor torque requirements
  • Experience with material density implications in mechanical design
NEXT STEPS
  • Research methods for calculating load on rotating shafts
  • Learn about shaft sizing standards and guidelines
  • Investigate motor selection criteria based on load and RPM
  • Explore the effects of product density on mechanical design
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Mechanical engineers, machine designers, and anyone involved in the design and optimization of conveyor systems and classification machinery.

rhawkbw
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I have a machine I want to build, the principle works on the basis that products enter a cylindrical sieve 900mm long, 2mm thick and 400mm dia, in the center is a shaft of 50mm dia, 1600mm long with 900 rpm. The shaft has paddles at a angle of 45deg to act as a conveyor by agitating the product against the sieve is intend to classify the product into various sizes. Each paddle is 120mm long and 60mm wide. What I would like to know is whether the shaft can handle the load, and how to actually calculate this load so as to determine correct shaft size to use as well as motor requirements. How would density affect this, the product has a density of 800kg/m3

If more info is required I can provide, please help
 
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