How should the augers be operated to avoid sling of mix?

• A. At low enough RPM
• B. At high RPM
• C. Not to exceed 1000 RPM
• D. Constant RPM regardless

Answer: (A)

The key idea is controlling how much kinetic energy the mix has as it exits the auger. Operating at a low enough RPM reduces centrifugal force on the material, helping keep the hot mix contained in the hopper or feed area rather than throwing it outward and creating a sling. If you run the auger too fast, the mix is propelled more aggressively and is easily flung to the sides, which wastes material and can be unsafe. Setting a rigid maximum RPM or running at a constant speed regardless of conditions ignores changes in material viscosity, load, or geometry, making sling more likely. So, the best approach is to use the lowest practical speed that still provides smooth, consistent flow of the mix.