April 2018, Vol.245, No.4

TechNotes

New Series of Pneumatic Hammers

HammerHead Trenchless, a Charles Machine Works Company, released the first model of its new XPR series of high-performance pneumatic hammers for pipe ramming and pipe bursting applications. The XPR series features a high-flow valve system that produces a more powerful effect.  The technology is a modification of the patented Air Reverse (AR) valve system standard on all HammerHead pneumatic hammers larger than 7 inches (180 mm). Both systems allow for the reverse function to be controlled above ground, greatly simplifying tool removal from pushing collets and burst heads, saving valuable time on the job.  The 26XPR, a 26-inch hammer, is equipped wi

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