The traditional double roll crusher is driven by two motors through reducers without mechanical buffer. Power consumption is higher. Double roll crusher designed by ANDE adopts single e-motor, small & big pulley and dual output shaft reducer to drive fixed roll and loose roll, keeping two rolls rotating at constant differential speed. Ball coupling is used to connect fixed roll and reducer to have better impact resistance. Operation is reliable with higher crushing efficiency and lower power consumption.

Four roll crusher is driven by two units of E-motor, reducer, coupling and pulleys. Each pair of roll is driven by one drive unit.

If material is to be crushed smaller with uniform product size, crushing roller shall be cast with multi-element low alloy steel. Surface hardness is between HB260-380 after heat treatment and precise finishing.

If size of material is bigger and moisture content is higher, buildup welding with wear-resisting alloy wire can be adopted for surface of rollers, which can help increase friction coefficient of the rollers and bite into the material.

Double-roll/Four-roll crushing rollers are equipped with mechanical or hydraulic loading device, which can protect working rolls when foreign matters enter the machine. It can also be used to adjust the gap between working rolls to compensate the wear consumption of the roll skin. Hydraulic loading is equipped two-cylinder & four-chamber hydraulic cylinder (patent no.: ZL201420846028.2), which has good performance of sync buffering and keeps pressure for long time.

When roller is worn or groove & pit at surface occurs, repairing can be done with cutting/grinding device. If surface hardness is too high to cut, specially designed grinding device can be adopted (Patent no.: ZL 2006 2008 1378X). While rotating normally, roller can be ground by quartz wheel, which can reduce repairing job intensity.