Blog: Technical Tip – Hopper Feeder Loading

Follow the Rulmeca Corporation Blog for conveyor drive application “success stories” and updates on Motorized Pulley features and upgrades.

This “technical tip” answers how to calculate the downward force a hopper will exert on a feeder conveyor.  Downward Force equals the product of the active volume in cubic feet and the bulk density in pounds per cubic foot.  The active parabolic volume may be approximated by a prism which equals the hopper opening length x the hopper opening width x the height of the prism.  Prism height equals 3 x length or 3 x width, whichever is smaller.


We supply Motorized Pulley belt conveyor drives, serving equipment manufacturers directly and end users through a network of independent distributors & local service providers throughout the United States and Latin America.

This 10 minute video explains:

  • Purposes of Hoppers
  • Standard Conveyor Belt Loads
  • Special Hopper Load

This 10 minute video explains:

  • Arching Theory
  • Calculating Hopper Drag Load
  • Pressure Relief Tips