Hydraulic Tunneling Drilling Rig, KJ421

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Two-boom face drilling rig Dimensions (L×W×H): 13000×2200×2400/3100mm Weight: Approx. 22000kg Maximum gradeability: 25%(14°) Range of cross section: 16-68m²

KJ421 hydraulic tunneling drilling rig is a two-boom jumbo designed for drilling vertical, inclined and horizontal blast holes and bolt holes. It is ideal for use in mining and tunneling applications with cross sections from 16m² to 68m².

Video Show Structure Diagram Technical Specifications

Dimensions and weight
Length			13000mm
Width			2200mm
Height			2400/3100mm
Weight			Approx. 22000kg
Tramming speed on flat ground			10km/h
Maximum gradeability			25%(14°)
Safety protection
Noise level
Lifting safety roof			Meet the requirements of FOPS and ROPS
Air and water system
Air compressor	1×JN11		Oil consumption of lubrication	2×180-250g/h
Capacity of air compressor	1.55m/min
Pressure	8bar		Water pump	1×CRI10-22
Air consumption of lubrication	2×0.3m/min		Power	7.5kW
			Capacity of water pump	10m³/h
Chassis
Diesel engine	Cummins QSB3.9-C125 /93kW/2200rpm		Travelling braking	Wet type brake
Exhaust purification	Exhaust catalyzer		Parking braking	Mechanical brake
Drive system	Hydraulic torque converter gearbox		Fuel tank	120L
Drilling system
Rock drill (drifter)		2×HC95LM
Impact power		21kW
Impact flow		100-120L/min
Impact pressure		180-200bar
Impact frequency		54-62Hz
Torque		764Nm
Beam rotation		360°
Feed extension		1600mm
Model of drill boom		K40
Form of drill boom		Automatic parallelism
Boom extension		1800mm
Electric hydraulic power unit
Motor		2×75kW Three-phase motor
Impact/Feed/Positioning		Variable displacement axial piston pump
Rotation		Gear pump
Filter fineness		10µ
Hydraulic oil tank		400L
Hydraulic cooler		Air cooler
Working voltage		380V
Frequency		50Hz
Starting method		Star/delta
Cable reel		1×CRC1016
Length of reel cabling		100m