Log Washers

Log Washers are designed to remove tough, plastic clay contaminants and other deleterious materials from gravel, stone and various ore feeds.McLanahan Log Washers are capable of accepting feed material up to 6″ (150mm) cubed. As the percentage of material to be removed increases, longer units should be used to increase the washing action. In very severe applications, two or more Log Washers may be required.

Clays and other deleterious materials are removed by material on material scrubbing with water. To accomplish the desired results, material is delivered to the feed end of the washer box and subjected to an aggressive washing action caused by the intermeshing paddle design. Log Washer paddles help convey material and are a catalyst for material on material scrubbing. Log Washers sit at a slope of zero to 14 degrees depending upon the severity of the washing action. As the percentage of deleterious material increases, the slope must be raised to increase retention time.

After deleterious material has been liberated, clean material moves upward between the shafts and discharges out the bottom of the box after a final rinse. Deleterious materials are absorbed into the water and carried over a weir on either side of the box. In high capacity applications, an optional rising current system helps lift waste fractions to the top of the water level and over the weir.

Originally engineered by Samuel Calvin McLanahan in 1894, producers can be sure that McLanahan Log Washers are designed with safety and simplicity of operation in mind. All McLanahan Log Washers employ a V-belt driven, single-input, dual-output gear reducer that can be uncoupled from the log shafts and frame for maintenance. Heavy-duty washer boxes are diagonally reinforced on the bottom and vertically along the sides to provide years of maintenance-free use. Standard drive guards and optional top covers are available for personnel protection.

Features / Benefits

Equipment Models


  • 36″ (91.4 cm) diameter paddle swing – available in 25′ (7.6m) and 30′ (9.1m) lengths
  • 38″ (96.5 cm) diameter paddle swing – available in 30′ (9.1m) and 35′ (10.6m) length

Super Mudmaster

  • 46″ (116.8 cm) diameter paddle swings – available in 30′ (9.1m) and 35′ (10.6m) length


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