Vibratory Screens

The McLanahan MD Vibratory Screen is a compact, high capacity dry screening unit used in a variety of industries. Animal feed (pellets and crumbles), dried sand, fertilizer, iron ore, wood pellets, quick and burnt lime, limestone, grain, gypsum, salt, and sugar are just a few of the materials and applications in which the MD Vibratory Screen is capable of screening efficiently and effectively.They are capable of screening more tons per hour per square feet of screen surface area and handling larger capacities than conventional screens while occupying the same – or less – floor space. Additionally, the MD Vibratory Screen is capable of making multiple product sizes simultaneously as progressively smaller material sizes are separated from deck to deck.

Screen meshes of progressively smaller apertures are mounted in the compact vibrating frame at increasingly steeper angles. The apparent opening through which particles fall vertically is smaller than the actual aperture because of the angle of the screen deck. In other words, the McLanahan MD Vibratory Screen makes a separation at a given size using a mesh aperture of greater size. This design concept reduces the risk of pegging and blinding, while achieving high capacities.

The rapid, vertical movement of the material gives the MD Vibratory Screen its large capacity in relation to the machine size. Because of its smaller size compared to conventional screens of the same capacity, excess energy is not wasted to move material forward. Instead, gravity does most of the work as material falls through the screen decks.

Depending on the model, the MD Vibratory Screen vibrates using one or two counter rotating eccentric weighted vibratory motors. The horsepower of the largest motor on the largest MD Vibratory Screen model is only 8.3 HP. Mounted directly to the frame, the motor(s) sits and spins within itself; there is nothing to pull or push, no reducers, no pulleys, and no belting. Motor bearings on the eccentric weighted drive are the only moving parts that require maintenance attention, normally in excess of 15,000 hours of operating time.

McLanahan MD Vibratory Screens are available in widths ranging from 19” (48cm) to 78” (198cm) with 1 to 5 screen decks depending upon the application. The MD Vibratory Screen is capable of handling feed sizes as large as approximately 3” (7cm) and can make size separations down to approximately 60 mesh.

McLanahan Corporation maintains in-house equipment to conduct laboratory screening tests on materials to help ensure that you have the correctly sized MD Vibratory Screen for your application.

Features / Benefits

Equipment Models

DM (Dual Motor)

Ranging in widths from 19” (48cm) to 78” (198cm) and having 3 to 5 screen decks.

SM (Single Motor)

Ranging in widths from 19” (48cm) to 78” (198cm) and having as few as 1 screen deck and as many as 4 screen decks.

DMX (Dual Motor – Extra Screen Length)

Ranging in width of 39” (99cm) to 78” (198cm) and having 3 to 5 screen decks.


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