FY / FSF Series Double Roller Crusher for Controlled Crushing

The FY / FSF Series Double Roller Crusher is a crushing solution developed by our company based on extensive market research and continuous improvement of traditional roll crusher designs. By integrating the proven advantages of similar equipment and optimizing key structural components, this series delivers stable performance, low fines generation, and precise product size control.

Unlike impact-based crushing equipment, the FY/FSF Series utilizes two counter-rotating rollers to crush materials mainly through compression and limited shearing. This working principle effectively minimizes excessive fines, ensuring a narrow and uniform particle size distribution. As a result, the equipment is especially suitable for applications where strict control of product granularity and low over-crushing rate are required.

The crusher consists of two cylindrical rollers rotating in opposite directions. Material fed into the crushing chamber is drawn between the rollers and subjected to compressive force. Once the material strength is exceeded, it fractures along natural weak points rather than being shattered by high-speed impact. This controlled crushing mechanism significantly reduces powder generation and preserves the integrity of the product particles.

One roller is fixed in position, while the other is mounted on a sliding mechanism. The gap between the rollers, which determines the final product size, can be accurately adjusted according to process requirements.

Frame

The rigid frame serves as the main supporting structure of the crusher. It is designed with sufficient strength and stiffness to withstand continuous crushing forces and long-term operation under industrial conditions.

Rollers

The rollers are the core working components of the crusher:

Fixed Roller: The bearing housing is firmly mounted to the frame, providing stable support during operation.

Movable Roller: Installed on sliding guide rails and supported by heavy-duty springs or hydraulic cylinders, allowing controlled movement during overload conditions.

Drive System

The drive system typically consists of an electric motor, V-belt drive or reducer, and a pair of large synchronized gears. One roller acts as the driving roller, while the second roller is driven through gear engagement. This configuration ensures synchronous rotation, stable transmission, and reliable torque distribution.

Adjustment System

The roll gap can be adjusted by adding or removing shims or by regulating hydraulic pressure, enabling precise control of the discharge size. This adjustment mechanism allows operators to respond quickly to changing production requirements.

Overload Protection System

A spring or hydraulic overload protection device is incorporated to prevent damage caused by uncrushable materials such as iron pieces. When such objects enter the crushing chamber, the movable roller is forced backward, temporarily increasing the roll gap and allowing the foreign material to pass through. Afterward, the roller automatically returns to its original position.

Coal Industry

Widely used for crushing raw coal and coke while minimizing fines generation, making it ideal for coal preparation plants and coking facilities.

Cement Industry

Suitable for crushing cement clinker, limestone, clay, and other raw materials where consistent particle size is required.

Chemical and Metallurgical Industries

Applied in crushing coke, slag, quartz, and various medium to low hardness chemical raw materials and metallurgical additives.

Building Materials and Ceramics

Used in fine crushing processes for ceramic raw materials, glass batch materials, and applications requiring strict powder content control.

Laboratory and Small-Scale Production

Thanks to its simple structure, ease of operation, and precise particle size control, the crusher is also suitable for laboratory testing and small-scale production lines.

The FY/FSF Series Double Roller Crusher is suitable for medium and low hardness brittle materials, including but not limited to coal, coke, limestone, gypsum, marl, and various chemical raw materials.

It is not recommended for high-hardness or highly abrasive materials such as granite or basalt.

Low Over-Crushing Rate and Uniform Product Size

The compression-based crushing method ensures minimal fines generation and a concentrated particle size distribution, which is the most significant advantage of this equipment.

Simple Structure and Easy Maintenance

With a clear mechanical layout and fewer complex components, routine maintenance and replacement of wear parts such as roller surfaces can be carried out easily.

Reliable Operation and Sensitive Overload Protection

The spring or hydraulic protection system effectively prevents severe damage caused by foreign objects, ensuring safe and stable operation.

Flexible and Precise Product Size Adjustment

The roll gap can be adjusted quickly and accurately, allowing operators to control product size with high precision.

Low Dust Emission

Compared with high-speed impact crushers, the low-speed compression crushing process generates significantly less dust, contributing to improved environmental performance.