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How it Works

How does a roller mill work? A rolling mill is a mill that uses compression on a single, double or even triple cylindrical wheel that is rotated along the long axis against another wheel or a plate. The cylindrical wheels are mounted horizontally and only one is run by a motor to move the grains between the two wheels while the other moves slowly as a result of friction.

Usually a single motor is used to power two rollers that will be rotating at a faster speed while a system of pulleys is used to allow easy rotation of the other rollers. If the system has three rollers in line, the third pair of rollers in the system is operated using a different motor.

The rollers arranged inside the rolling mill rotate at different speeds and the grains are sheared and broken down as they move from one level to the other. Rolling mills can be used to attain different particle sizes as desired. To do this, the following things are adjusted;

• The gap between the rollers
• The speed differential between the rollers
• The rate at which more grain is fed into the system

Roller mills can be of different types depending on the function they perform. Some of the common roller mills you will find include; crackers, flakers, grinders, crimpers and crumblers. This is all dependent on what the mills will be used for.

Roller mills are highly preferred and continue to dominate the milling industry because of their many advantages over the other types of mills.