The Double Roll Crusher is a continuous-duty, precision secondary and fine crushing machine that reduces soft to medium-hard brittle materials by drawing feed material into the gap between two counter-rotating, parallel crushing rolls and subjecting it to intense compressive and shearing forces as it passes through the roll gap. As one of the oldest and most reliable crusher designs in heavy industry, it is the preferred size reduction solution for coal preparation plants, coking operations, and chemical processing facilities where product over-crushing, dust generation, and output size consistency are critical operational requirements.
XINGAONAI Double Roll Crushers are engineered with two heavy-duty forged steel roll shafts, each mounted on a robust cast steel frame with self-aligning roller bearing assemblies on both ends. One roll shaft is fixed; the other is mounted on a floating bearing frame tensioned by a spring or hydraulic pressure system that allows the movable roll to retract against the spring force when uncrushable material enters the roll gap, protecting the rolls and bearings from overload damage and automatically returning to the set gap position once the obstruction passes. Roll surfaces are available in smooth, corrugated, and tooth-profile configurations depending on material hardness, required output size, and product shape requirements.
Roll diameter ranges from 400 mm to 1,500 mm and roll width from 400 mm to 1,800 mm, delivering processing capacities from 1 TPH to 100 TPH. The output particle size is precisely controlled by the roll gap setting, adjusted by moving the floating roll bearing frame via the gap adjustment mechanism, covering output size ranges from 0.5 mm to 30 mm. The drive system uses twin motors with V-belt or gear coupling to each roll shaft, ensuring synchronized counter-rotation at matched peripheral speeds for consistent nip angle and efficient material draw-in across the full roll width.
