Crawler Mounted Hydraulic DTH Drilling Rig Automatic Crawler Mounted DTH Drill Rig, Crawler Mounted Drilling Rigs Advanced Technology, easy to handle and operate. Borehole Diameter 105ï½?305mm Site Condition CM458 is applicable to all kinds of anchor supporting operation, grouting hole drilling for cofferdam, dam, and base reinforcement. Newly designed hydraulic clamp makes operation easier. Product Features CM458 internal combustion (CM458D Electric) crawler mounted versatile anchor rig adopts diesel engine and hydraulic oil pump assemblies to provide power, allowing rigs to finish moving, rotating, propelling and lifting, as well as angle positioning. During drillingï¼?only the percussive hammer consumes compressed air.  CM458 is applicable to all kinds of anchor supporting operation. In addition, the rig is also applicable to the grouting hole drilling for cofferdam, dam, and base reinforcement. Newly designed hydraulic clamp is a very useful device making operation easier. Model CM458 Borehole diameter 105-305mm Borehole depth 200m Applicable rock hardness f=6-20 Working air pressure 1.2-3.5MPa Air consumption 16-40m/min Feeding stroke 3300mm Rod-changing length 3m Ground clearance 254mm Rotation rate 0-50rpm Rotation torque 5400Nm Travle speed 2Km/h Grade ability 24° Power Yuchai 70KW/Cummins 74KW Electric motor 45KW Dust collector (optional) Hydraulic dry dust collector Wet dust collector Dimension (LxWxH) 6900mmÃ?2200mmÃ?2200mm Weight 6200kg