Extremely safe, productive,reliable,and easy maintenance machines supplying
Underground / tunneling drill rigs,bolters,longhole drill rigs,and scaler manufacturing…

KJ421 two boom electro-hydraulic mining jumbo

equipo de perforación de desarrollo electrohidráulico con dos brazos diseñado para ofrecer rápidas y precisas excavaciones de túneles y excavación de minas con secciones transversales de entre 8 y 60 metros cuadrados.

KJ421 is a two-boom, electro-hydraulic mining development drill rig, engineered for fast and accurate drilling. This mining jumbo provides reliability of face drilling, cross-cut drilling and bolt-hole drilling in tunneling of 8-60-square-meter cross sections. Well-designed, structures and proven components ensure this mining jumbo a reliable workplace for both operators and maintenance crews. Optimised drilling control system will help to keep holes straight, reduce jammings and maximize the tool life consistently.

Quick Facts
» Drifter / rock drill: HC95LM, 21 kW,
» Feed 360-degree rollover and ±45° Swing,ideal for cross cutting and bolting,
» Hole diameter: 64 - 102 mm with HC95LM Rock Drill/Drifter,
» Coverage: 8 - 68 m2,
» Engine power: 93kw/2200rpm Cummins,
» Motor power:75 kw ABB*2.

- heavy-duty boom with double tripod suspension for accurate hydraulic parallel holding in all directions,
- heavy-duty aluminium feed with high bending and torsional resistance for maximum durability,
- FOPS/ROPS-certified cabin/canopy offers increased safety for operators,
- Troubleshooting, fault finding and maintenance made easy,
- Spare part commonality across product family.

Technical Specifications
Hydraulic Drifter/Rock Drill Control System
Type HC95LMAnti-jamming control Yes
Percussion power 21kW Rotation control Adjustable/Reversible
Percussion pressure Max. 200 bar Flushing control Water flow and pressure
Percussion rate 54 - 62 Hz Percussion control Adjustable power
Rotation torque 764 Nm Voltagel 24V
Hole size (bolting) ∅64 - 102mm Carrier
Shank adapter T45 / T38 male Type of carrier Frame-steered
Boom Carrier articulation ± 40°
Parallel holding Complete Rear axle oscillation ±10°
Lifting angle Up55°,down 16° Cummins engine QSB-C80-31 93 kW,Tier 3
Swing left 35°,right 35° Transmission Hydrodynamic DT20000
Extension 1800 mm Front / Rear Axles DANA 123
Feed extension 1600 mm Tires 14.00-24
Feed roll-over angle 360° Rotaty Actuator Service brakes Hydraulic wet disc
Hydraulic System Parking and emergency brakes SAHR fail safewet disc
Powerpack 2 x 75 kW Tramming speed Max.16 km/h
Percussion pump 100 cc (variable) Gradeability / sideways tilt Max. 15° / 5°
Rotation pump 45 cc (gear) Ground clearance 370 mm
Filtration 10 µ Centralized greasing points 10 ports
Oil tank volume 300 liters Air And Water System
Cooler for hydraulic oil Oil-to-water 2 x 30 kW Flushing By water
Electric System Water pump capacity 190 l/min
Standard voltages 380 - 690 V (± 10%), 50 or 60 Hz Rock drill oil consumption 180 - 250 g/h
Total installed power 160 kW Rock drill air consumption 360 l/min
Batteries(Chargeable) 2 x 12 V, 120 Ah Air compressor 1.55 m³/min (7 bar)
Cable Reel 80m-100m Overall with steels 3.7m,others depending on options.
Cable reel lubrication Manual Weight 25000 kg
Cable reel mud clean Manual Transport length 13000 mm
Front lights 6 x 50W LED (4200 lm, 6000 K) Tramming / drilling width 2200 mm / 3010 mm
Rear lights 4 x 50W LED (4200 lm, 6000 K) Tramming / drilling height 2400 mm / 3100 mm
Percussion hour meters Optional Turning width(T-section) 4060 mm
Operator remote control Optional Turning radius(Inner/Outter) R3700 / R7300 mm
Below dimensions in mm,and against drilling steels/ rods length 3700mm.Optimum operating coverage about 60 m2.

extremely productive and reliable mining development drilling rigs

offer an ergonomic and safe workplace for both operators and maintenance personnel.

With console type optional
offer an ergonomic and safe workplace for both operators and maintenance personnel.

Tailor-made specifications accepted.

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