Boart Longyear Limited released the new XRH family of rotary heads, composed of 12 base models with various motor configurations, and designed for all construction and multipurpose rotary drilling applications, including jet grouting and reverse circulation.
Featuring patent-pending electronic valve-control technology, the XRH rotary heads can run two or three motors and seamlessly switch from series to parallel operation, eliminating low-torque startups after making and breaking joints and manual shifting of gears. In addition to easy installation, the XRH rotary heads are extremely powerful. Capable of delivering up to 27,000 Nm (19915 ft.-lb.) of torque or a maximum rotation speed of 188 rpm, the XRH family is ideal for a wide range of applications. They are engineered to safely handle up to 20,000 kg (44,090 lb.) of pullback force, providing optimum performance in auger, down-hole hammer, reverse circulation, jet grouting, overburden and rotary drilling.
Boart Longyear, www.boartlongyear.com/xrh