In a Double Roll Crusher, the forces needed to crush material are created through the rotating energy of the opposing rolls. Since each machine is custom engineered, roll elements and tooth patterns are selected depending on each unique application to produce a cubical product with minimal fines.
Designed for safety and many years of operation, effective tramp protection against non-crushable material is provided by an automatic spring-and-toggle system. This allows a movable roll to open, pass the material and return to its original setting for continued operation. Hydraulic product size adjustment allows producers to adjust for changes in product size requirements or to compensate for roll wear.
Operation of Double Roll Crushers is simple without timing gears. Dual drive arrangements use a separate electric motor and V-belt drive for each roll, resulting in quiet operation, while for single drive arrangements power is transferred to opposing rolls by an inter-stage V-belt drive.
McLanahan Corporation has a fully equipped applications research laboratory where crushing and screening tests can be performed to confirm crusher selection.
Black Diamond Double Roll Crushers are the most versatile and popular model of McLanahan Double Roll Crushers. Ideal for tertiary crushing where product requirements drop below ½” (12.7 mm), Black Diamond Double Roll Crushers are most commonly used to crush clean coal or friable materials with little or no hard refuse. They are available with single or dual V-belt drive.
Heavy-Duty Double Roll Crushers are ideal for the primary, secondary and tertiary crushing of limestone, gypsum, ROM coal, etc., yielding a cubical product. Low horsepower machines, Heavy-Duty Double Roll Crushers operate with two V-belt drives. They can be equipped with solid or segmented rolls.
Shalemaster Double Roll Crushers are driven mechanically through gear reducers and couplings. They offer the same durability as other McLanahan Double Roll Crushers, but are designed to handle wet, sticky feeds such as soft shale, kaolin and clay. The Shalemaster’s special claw tooth roll design and differential roll speeds provide optimum performance against plugging and other problems that are often associated with handling sticky materials.
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