Vertical shaft impact (VSI) crushers

Barmac® B Series™ VSI crushers have outstanding shaping capabilities

Vertical shaft impact (VSI) crushers are generally used in the last phase of the crushing circuit. Metso's family of VSI crushers is called Barmac® B Series™ VSI crushers. Due to their ability to produce precisely shaped end products, Barmac® B Series™ VSI crushers are most popular among aggregates producers, construction industry and recycling applications – as stationary, portable or mobile versions. In mining operations, Barmac® B Series™ VSI crushers are utilized in preparing the material feed for grinding.

High-quality end products

Superior cubical shape.

Increased uptime

Shorter maintenance breaks and longer wear life.

Easy to install and maintain

Minimal foundation requirements, maintenance lifting tools, and inspection door for rotor access.

Safety

Special tools for rotor service and crusher top half lifting.

Original Barmac® B Series™ vertical shaft impact (VSI) crushers

Barmac® vertical shaft impact (VSI) crushers were the first vertical shaft impactors in the world. The original Barmac® VSI crusher was developed in New Zealand over 40 years ago after which the VSI crushers have spread to thousands of crushing sites around the globe.  

Barmac® VSI crushers have evolved immensely over the years, but their trademark is still the same – accurately shaped end products. 

In addition to the stationary crushers presented on this page, some VSI crusher models are also available as mobile or portable versions.

High-quality end products

The secret behind Barmac® B Series™ VSI crushers’ efficiency is the unique crushing process. While most other crushers reduce rocks by pushing them by force against metal, Barmac® B Series™ VSI crushers also use the rock fed into the machine to crush itself. 

This autogenous crushing action results in lower cost per ton than any other impact crushing method. Furthermore, rock-on-rock crushing has proven to produce end products that have precise and homogenous shape. 

In addition to traditional rock-on-rock crushing, Barmac® B Series™ VSI crushers can nowadays also be equipped with metallic anvils on request. In this case the rock-on-rock cavity ring is replaced with an anvil ring, and the rocks are slung against metal anvils instead of a rock bed. The anvil solution improves reduction ratio and enables finer end products, but the downside is slightly higher wear costs because the anvils must be replaced from time to time.  

Barmac® B Series™ VSI crushers accept fines in the feed and allow user to finetune crusher’s performance by changing the rotor speed or cascade ratio. Due to these features and precise reduction, Barmac® VSI crushers are especially useful for producers who are after cubical end products used for example in concrete, asphalt and in groundwork materials.

Moreover, the accurate shaping capabilities have proven worthy in manufactured sand, heap leaching, pre-grinding, industrial minerals, and recycling applications.

  • End products with superior cubical shape
  • Accepts fine feed material

Increased uptime

In Barmac® B Series™ VSI crushers the primary path for feed material is through the rotor where it can be accelerated up to 80 m/s (262 ft/s) before being discharged into the crushing chamber. Additionally, material may be cascaded into the crushing chamber, bypassing the rotor.

The cascade feature enables the operator to optimize the capacity and power consumption and to manipulate the product grading and shape to meet the specification requirements.

  • Ability to control product grading
  • Fine-tune product with cascading

Easy to install and maintain

Barmac® B Series™ VSI crushers are designed to prolong the lifetime of wear parts and increase the operational availability by reducing the time needed for parts changes.

Service time is drastically reduced with quick access to the rotor parts via an inspection door. The roof lifter and rotor service arm eliminate the need for an external crane in regular maintenance which simplify servicing the internal workings and speed up rotor changes.

  • Low wear costs due to rock-on-rock crushing
  • Metso parts for trouble-free operation

Safety

Simple and reliable automatic lubrication handles the daily greasing of the main shaft, and Metso IC™ crusher automation ensures safe operation and condition monitoring from distance.

  • Multiple features for safer operations and maintenance
Anvil solution

Barmac® B Series™ VSI crushers can be equipped with metallic anvils on request.

In anvil solution the rock-on-rock cavity ring is replaced with an anvil ring.

The anvil solution improves Barmac® VSI crushers’ reduction ratio and enables finer end products, but wear costs are slightly increased since the anvils must be replaced from time to time.   

Barmac® B Series™ vertical shaft impact (VSI) crushers' technical specifications

Applications for VSI crushers
How others have improved profitability and reduced risks?
VSI crusher spare parts and wear parts
Services for VSI crushers

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