JK520 Crawler Mounted Hydraulic DTH Drilling Rig Crawler Mounted Hydraulic DTH Drilling Rig Crawler Mounted Drilling Rigs, Crawler Mounted DTH Drill Rig It features its compact design, small footprint, and humanized operation. Borehole Diameter 90-150mm Site Condition It is applicable to the blasting borehole drilling process of hydro project, open pit mining and road construction. Product Features JK520 internal combustion (electric) crawler mounted hydraulic DTH drilling rig is the latest updated product of the "Sharp Sword" series, specially designed for the hydropower project and quarry mining project.  JK520 can drill boreholes of various angles, ranging from horizontal angle to vertical angle. It boasts its better performance, compact design, small footprint and humanized operation. JK520 is equipped with environment-friendly dry type dust collector, and as long as water is accessible on working site, wet type dust collector is optional. Model  JK520 Borehole    diameter 90-150mm Borehole    depth 40m Applicable    rock hardness f=6-20 Working air    pressure 1.2-2.4MPa Air    consumption 11-21m³/min Feeding    stroke 3865mm Rod-changing    length 3m Max.    horizontal drilling height 2510mm Feed    extension 1200mm Ground    clearance 300mm Rotation rate 0-79rpm Rotation    torque 2500Nm Travle speed 2Km/h, 3Km/h Grade ability 25° Power Yuchai    70KW Dust collector (optional) Hydraulic dry dust    collector Wet dust collector Dimension    (LxWxH) 7000mmÃ?2250mmÃ?2250mm Weight 5800kg Wired remote    control Optional