Machine Design Help - Calculate Load & Shaft Size

AI Thread Summary
The discussion focuses on designing a machine that uses a cylindrical sieve and a central shaft with paddles to classify products by size. Key concerns include calculating the load on the shaft, determining the appropriate shaft size, and selecting the correct motor specifications. The shaft dimensions are specified as 50mm in diameter and 1600mm long, rotating at 900 rpm, while the product density is 800kg/m3. Participants seek guidance on load calculations and the impact of product density on shaft performance. Additional information or diagrams may be provided to assist in the calculations.
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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