Impact crusher Barmac® B series

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Barmac® vertical shaft impact (VSI) crushers were the first vertical shaft impactors in the world. The original Barmac® 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® 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. The secret behind Barmac® crushers’ efficiency is the unique crushing process. While most other crushers reduce rocks by pushing them by force against metal, Barmac® crushers also utilize the rock to crush itself. This so called 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. Barmac® crushers are especially useful for producers who are after cubical end products used for example in concrete, asphalt, groundwork materials, manufactured sand, heap leaching, pre-grinding, industrial minerals, and recycling applications. Barmac® crushers accept fines in the feed and allow user to finetune crusher’s performance by changing the rotor speed or cascade ratio. 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.