The cubicator for crushing and refining

Rotor centrifugal crusher


Rotor centrifugal crusher (RSMX)

The rotor centrifugal crusher type RSMX is a high performance crusher with vertical shaft (VSI) and is used for crushing and refining of mineral materials. It is suitable for all types of mineral materials, including highly abrasive feed materials and feed materials with a high hardness. Depending on its size, high throughput rates of 30 to 400 t/h can be achieved.

Every single particle of the input material undergoes extreme acceleration due to the centrifugal force in the rotor and is hurled against the impact wall. The impact wall can either consist of an anvil ring or alternatively of a material bed. Clogging is avoided due to the generous dimensioning of the rotor and housing. The crushing results can be substantially controlled and optimized by selecting a suitable speed.

Benefits at a glance:

  • Generating valuable end products
  • Targeted, selective crushing and improved cubicity
  • Globally proven twin-chamber rotor
  • Stress is applied to every single particle
  • Highly flexible operation with anvil ring or material bed
  • Unit ready for operation
  • Easy maintenance and high availability

Generating valuable end products

Creating high-quality cubical products

Every single particle of the input material undergoes extreme acceleration due to the centrifugal force in the rotor, which hurls the particles against the impact wall. It is possible to achieve a very high cubicity of the end product thanks to high impact stress.

Consistent quality of end products

The crushing results remain consistent even as wear and tear increases. Due to the nature of the system, random effects are prevented while material is being shredded. This is another feature that sets the BHS rotor centrifugal crusher apart from other conventional crushers.

Targeted, selective size reduction

Every single grain is subject to selective impact crushing. As a result, more brittle material is shredded to smaller sizes than other materials. This makes it possible to selectively crush brittle aggregate elements or damaged input material and significantly increase the quality of the end products (Los Angeles values, frost resistance). In the case of raw ores and industrial minerals composed of elements that vary in strength, the end product is enriched.

Superior machine technology

Globally proven twin-chamber rotor

With decades of experience in the field, BHS-Sonthofen is the specialist for crushers with a vertical shaft (rotor crushers and VSIs). One of the milestones in the further development of this machine is the patented twin-chamber rotor.

Unit ready for operation

The machine and drive train are assembled onto a base frame as a unit that is ready for installation. A large cover that can be raised hydraulically and pivoted by 360° allows unimpeded access.

Reliable greasing

The BHS rotor centrifugal crusher is supplied with a recirculating oil lubrication system that includes cooling and integrated monitoring. This allows for low-maintenance, reliable operation.

Easy maintenance and high availability

All areas of the machine that are in contact with the crushing material are protected by wearing parts that are easy to exchange and made of materials that can be optimized for specific applications. This does away with the need for surfacing or keeping a second rotor in stock.

Vibration absorption

The rubber spring elements between the base frame and the machine absorb vibrations generated during operation and keep them away from the support structure. Excessive vibrations are registered by an electronic vibration monitor and cause the machine to be shut down.


Operating principle with ring armouring (top view)
Operating principle with sand bed (side view)

Twin-chamber rotor

Compared to the multi-chamber version, less air is transported in the patented twin-chamber rotor. This has a positive effect on power consumption. The energy saved here can then be used to increase throughput rates, and the dust removal system can be operated at reduced power.

The maximum possible material outlet sizes (89° per rotor side) are made possible by the open design of the patented twin-chamber rotor. This significantly reduces the risk of blockage.

A material bed forms along the centrifugal chambers in the BHS twin-chamber rotor to provide autogenous wear protection. Compared to conventional rotors, the number of wear parts that are required is reduced to a minimum.

  • High throughput rate
  • Low risk of blockage
  • Guided acceleration of material
  • Optimum energy efficiency
  • Less wear and tear

Area of application

Highly flexible

Depending on the input material and the required crushing results, the BHS rotor centrifugal crusher can be operated with either an anvil ring or a sand bed as the impact wall.

Typical applications with an anvil ring

Typical applications with an anvil ring

  • Production of high-grade cubical chippings and sand from medium-hard, moderately abrasive feed material such as gravel, limestone, dolomite, diabase, basalt, andesite, broken bricks and cement clinkers
  • Selective crushing of molasse and other conglomerates, moderately abrasive slags, industrial minerals, overburden, etc.
  • Recycling of asphalt and non-reinforced construction waste

Typical applications with sand beds

Typical applications with sand beds

  • Production of high-grade cubical chippings and sand from highly abrasive feed materials such as gravel, granite, porphyry, gneiss, graywacke and granular quartz.
  • Granulation of highly abrasive materials such as aluminum oxide, ferrosilicon, abrasives and glass.
  • Selective crushing of slags from steelworks, waste incineration plants and similar facilities.


Reinforced cover cladding [1]

In order to increase the service life, a cover with reinforced lining can be selected as an option.

Electro-hydraulic cover opening [2]

For even faster opening of the machine cover for maintenance and inspection, an optional electro-hydraulic actuation mechanism is available.

Quick-change system [3]

To reduce installation times, the quick-change system allows you to replace the entire set of anvil rings with the aid of a hoist if there is sufficient space available to do so.

Electrical installation in terminal box [4]

If required, all electrical wiring can be bundled in a terminal box for easy installation.

Intensive cooling [5]

In the event of high ambient temperatures or if the material to be processed is hot, a supplementary lubrication unit featuring a larger storage volume and stronger cooling power can be provided.

Air cannon [6]

In order to reduce material deposits in the outlet area, the crusher can be optionally equipped with air cannons.

Control unit

To provide an alternative means of operation, the machine can be shipped with a PLC controller (including touch panel) and a frequency converter if required. This allows for autonomous operation and monitoring of the machine’s functions.


We can also provide the steel construction, storage bunker and metering equipment, feed and discharge equipment, and dust capture systems – all adapted to your specific applications.

Technical specifications

Performance data

Standard designs

TypeRotor diameter
x height
Drive powerThroughput rate 1)Input size 2)  (max.)

RSMX 0913

930 x 135 mm70 m/s1 x 160 kW30 - 75 t/h45  mm
RSMX 0922930 x 220 mm70 m/s1 x 160 kW30 - 90 t/h63 mm
RSMP 0922930 x 220 mm70 m/s1 x 200 kW50 - 120 t/h63 mm
RSMX 1222 (Single-Drive)1.200 x 220 mm70 m/s1 x (200 - 400 kW)100 - 300 t/h80 mm
RSMX 1222 (Twin-Drive)1.200 x 220 mm70 m/s2 x (250 - 315 kW)100 - 400 t/h80 mm
RSMX 1426 (Single-Drive)1.400 x 260 mm70 m/s1x (315 - 400 kW)200 - 400 t/h80 mm
RSMX 1426 (Twin-Drive)1.400 x 260 mm70 m/s2 x (250 - 315 kW)200 - 500 t/h80 mm

1) The throughput rate depends on the circumferential speed of the rotor and the grading curve of the input material.
2) The input size depends on the type of rock, the circumferential speed of the rotor and the percentage of maximum particle size in the grading curve (screened through square mesh).

Dimensions and weights

Standard designs

TypeABCDEFweight 3)

RSMX 0913

3.950 mm2.400 mm2.355 mm318 mm990 mm2.380 mm7.500 kg
RSMX 09223.950 mm2.400 mm2.355 mm318 mm990 mm2.380 mm7.800 kg
RSMP 09224.500 mm2.650 mm2.240 mm457 mm1.100 mm2.300 mm10.500 kg
RSMX 1222 (Single-Drive)5.080 mm2.860 mm2.605 mm457 mm1.468 mm2.720 mm12.100 kg
RSMX 1222 (Twin-Drive)6.700 mm2.860 mm2.815 mm457 mm1.468 mm2.996 mm19.500 kg
RSMX 1426 (Single-Drive)5.080 mm2.980 mm2.605 mm610 mm1.468 mm2.793 mm17.500 kg
RSMX 1426 (Twin-Drive)6.700 mm2.980 mm2.895 mm610 mm1.468 mm2.895 mm20.200 kg

3) Weight for standard design without motor and accessories.

All specifications apply to the standard version. Technical data for customized designs may differ from the specified data. All technical data may change due to development. Subject to modification without notice.


Tests give certainty

Which crusher is the right one for your application? Don’t leave anything to chance. Leave it to our team of process consultants. Working together with you, our specialists will test the material and develop a tailor-made solution for you.
Brochure "Rotor centrifugal crusher (RSMX)"
“Mixing & crushing” overview brochure
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September 2020
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