Xcentric Ripper International (XRI) offers XR82, XR52 and XR42 hydraulic rippers. These models are part of the company’s mining series, featuring a patented system that increases production by 80% over the competition, the company reported. Machines in the series are claimed to be virtually maintenance free, water resistant and less noisy than other digging tools. Although the mining series uses the same basic technology as the standard series, the mining models have been designed to provide greater impact force at lower frequency. The XR42 features a hydraulic working pressure of 24 megapascals (MPa); the XR52 is rated at 28 MPa; the XR82 is rated at 30 MPa.
http://www.xcentricripper.com