A collage of thyssenkrupp RollSizers

thyssenkrupp RollSizers

DoubleRollSizers have proven to be the ideal machines for coal preparation in mines or in the power generating industry.

Apart from the required product quality and the capacity, operators also focus increasingly on aspects, such as high availability, service life and ease of maintenance. In order to maximally meet all of these criteria, thyssenkrupp has developed its standard series for DoubleRollSizers.

Key benefits of thyssenkrupp RollSizers

  • Suited for underground and mobile applications
  • Can be implemented into existing crushing plants
  • Optimized product through numerous adaptation possibilities
  • Wear and energy saving due to pre-screening between the rolls
  • High operational safety
  • Easy maintenance
  • Automatic lubrication of the bearings
  • Generating a low amount of fines
A thyssenkrupp Mining Technologies RollSizer

Wear and energy saving

The crushing process in both types implements a screening effect. Fine material can pass the gap between the rollers without being crushed, which leads to a significant reduction of the wear rate and the power consumption.

High operational safety

RollSizers are supplied with all necessary security and monitoring devices to ensure safe and steady operation. The speed of the rollers and the temperature of the bearings are measured continuously and the data can be displayed in the control room and integrated in the distributed control system. This enables condition monitoring of all important components of the machine.

Fields of application

thyssenkrupp RollSizers are used for primary, secondary and tertiary crushing of medium-hard as well as sticky and soft materials.

The compact design of thyssenkrupp RollSizers makes them suited for underground and mobile applications as well as for the implementation into existing crushing plants, e.g. in material transfer areas.

RollSizers are typically used in these industries

  • Mining industry and mineral processing
  • Natural stone industry
  • Coal preparation
A 3D Rendering of a thyssenkrupp Mining Technologies RollSizer

thyssenkrupp RollSizer types

The standard model range of thyssenkrupp RollSizers includes a total of 20 machines of various sizes and designs. The series can be divided into primary, secondary and tertiary sizers/crushers. In the primary crusher, a conveyable product (<300 mm) can be produced from the raw materials with a maximum edge length of 2.0 m in one step. In the following crushing stages, the required target grain size can be produced in the secondary or tertiary sizer.

Besides the standard design we are also able to special solutions tailored to meet your individual needs.

Our flexibility is a major plus: We act on your specific requirements and adapt our RollSizers to suit the material to be crushed and the product size you require. We are also able to optimize our proven technology according to your specifications.

thyssenkrupp RollSizers

Design and function of thyssenkrupp RollSizers

Overall, our RollSizers are capable of crushing medium-hard rock as well as sticky and soft material such as lignite, coal, clay, marl, and similar raw materials. These materials are crushed by shear- and tensile forces generated by high rotor torques at a low circumferential speed. Due to the arrangement of the crushing tools, the fines in the feed can pass through the gap between the rolls, similar to a roller screen, without being crushed.

Some differences apply between the different kinds of operation of thyssenkrupp DoubleRollSizers depending on where the feed material is crushed.

Primary crushing with CenterSizers

For primary crushing, CenterSizers are used, in which the comminution takes place in the gap between the rollers, which rotate towards the center. By this working principle and the aggressively shaped teeth, it is possible to grip and process even big particles in the feed material.

CenterSizers can be equipped with an adjustable breaker bar to adjust the output grain size. The rollers are tipped with teeth, which are carrying exchangeable tooth pics made of wear resistant steel. The tooth pics can be exchanged quick and easy to reduce the maintenance time to a minimum.

Primary crusher: CenterSizer with breaker bar

Secondary crushing with SideSizers

Secondary crusher: SideSizer

In secondary crushing mostly SideSizers operate, whereby the comminution takes place between the outward rotating rolls and the sidewalls, which are equipped with integrated crushing combs at the narrowest point of the gap. The crushing gap can be set by adjusting the sidewalls.

The crushing combs are arranged laterally and have an especially high wear volume. In case of wear they can be repeatedly readjusted from outside and in case one side is worn out completely they can be turned to use the second side. Due to their high wear volume, a long service life with low maintenance and spare parts requirements is achieved. Both rolls are equipped with replaceable crushing segments. These crushing segments are available for various applications in different variants and can be exchanged quickly.


The design and features of thyssenkrupp RollSizers results in the following benefits for the customer:

  • Primary coal crushing with CenterSizers
  • Secondary and tertiary coal crushing with SideSizers
  • Optimized product through numerous adaptation possibilities
  • Suitable for underground and mobile applications as well as for the implementation into existing crushing plants through compact design
  • Low energy consumption and wear due to pre-screening between the rolls
  • High availability of the machine due to a continuous condition monitoring of important components
  • Automatic lubrication of the bearings
  • Easy maintenance
  • Modular design as well as tailored to specific demands


Data sheets

DRS 500 x 1000 C
pdf | 245 kb

DRS 500 x 1000 S
pdf | 266 kb

DRS 500 x 1500 C
pdf | 245 kb

DRS 500 x 1500 S
pdf | 266 kb

DRS 660 x 1500 C
pdf | 243 kb

DRS 660 x 1500 S
pdf | 266 kb

DRS 660 x 2250 C
pdf | 243 kb

DRS 660 x 2250 S
pdf | 266 kb

DRS 660 x 3000 C
pdf | 243 kb

DRS 660 x 3000 S
pdf | 266 kb

DRS 660 x 3700 S
pdf | 266 kb

DRS 800 x 1500 C
pdf | 244 kb

DRS 800 x 2250 C
pdf | 244 kb

DRS 800 x 3000 C
pdf | 244 kb

DRS 1000 x 1500 C
pdf | 264 kb

DRS 1000 x 2250 C
pdf | 265 kb

DRS 1000 x 3000 C
pdf | 264 kb


pdf | 741 kb