Significant improvement to plant capacity


Long-term plant production is significantly improved when the primary station is equipped with a rock breaker solution. Downtime due to build-ups and blockages can be easily cut to a minimum. This ensures a steady material flow through the primary station to the next process stages. The huge economic impact as a result of improved productivity means that the investment pay-back time is typically very short.

A rock breaker solution is clearly the safest way to manage blockages and build-ups and to clear the crusher cavity. The remote-controlled boom and hammer with the radio remote control, which is part of standard scope of delivery, means that the boom and hammer can be operated from a location that gives the operator unlimited visibility into the area where the rocks are moved or broken. Metso rock breaker solutions are also engineered safe and easy to maintain, with single-point lubrication of the boom joints as a standard feature.

Metso rock breaker solutions are complete functional packages optimized for primary crushing applications. Each component, breaker boom, rock breaker, hydraulic power unit and radio remote control, is optimized to work most efficiently with the other components. And each complete solution is optimized to work most efficiently with certain Metso crushers. Each component is engineered to meet the requirements set for the equipment used in rough primary crushing applications.


  • Safety
  • Complete, optimized solution
  • Engineered to Metso's standards

Process overview

Rock breakers are typically used to support the primary crusher, either jaw crushers or primary gyratories.

Rock breakers are most commonly used to break oversized rocks on top of the crusher cavity, to move single rocks which are stuck somewhere or to break build-ups caused by multiple coarse but not necessarily oversized rocks.

Rock breakers can also be used to crush oversized boulders on top of the grids or grizzlies or to assist material flow in chuteworks or other possible challenging places in crushing processes.

Rock breaker is the safest tool to manage bridgings, build-ups and oversized material in the feed.

How it works

Metso rock breakers consist of following components: breaker boom, impact hammer, hydraulic power unit and radio remote control.

Each rock breaker is a complete optimized package which is dimensioned perfectly to operate smoothly as a package. Each package is optimized to support certain size jaw crusher or primary gyratory.

Metso rock breakers are operated by a remote control unit. Same unit can be used as a radio remote unit or as a cable remote control unit depending on customer preference. Thanks to the remote controls the operator can operate the equipment from a location which is safe for the operator and from where the operator can easily see into the area where the rock breaker is operating.

Very often it is enough to move or turn the rocks to help the material to flow further in the process. But depending on the feed size and feed gradation more or less actual hammering also needs to be done.

Metso rock breakers are engineered and built tough for the demanding primary crushing applications to meet the same requirements as the crushers. Remote controls and proportional valves ensure smooth, agile and accurate controls which is important for safe, quick and easy operation.

 Metso Rock breaker solutions
  Boom reach Hammer weight Power rating Optimized for
MB293™ 2,9 m (9' 6") 400-550 kg (880-1 210 lbs) 18 kW (25 hp) *
MB302™ 3,0 m (9’ 10”) 300-400 kg (660-880 lbs) 18 kW (25 hp) Nordberg® C80 / C96 / C106 / C116
MB352™ 3,5 m (11' 6") 400-550 kg (880-1 210 lbs) 18 kW (25 hp) Nordberg® C130
MB432™ 4,3 m (14' 2") 1 100 kg (2 420 lbs) 30 kW (40 hp) Nordberg® C150 / C160
MB676™ 6,7 m (22' 1") 1 750 kg (3 850 lbs) 37 kW (50 hp) Nordberg® C200 / C160
MB1059™ 10,5 m (34' 7") 2 200 kg (4 840 lbs) 55 kW (74 hp) SUPERIOR® Primary Gyratory

*) Please contact Metso for more information

Metso Crushing and Screening solutions - English Download
Metso Brech- und Siebtechnik - German Download
Metso Solutions de broyage et de criblage - French Download
Metson murskaus- ja seulontaratkaisut - Finnish Download
Metso - Soluzioni per la frantumazione e per la vagliatura - Italian Download
Metso Kross- och siktlösningar - Swedish Download

Previously viewed products