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 16-68-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: HC95SA, 20 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: 16 - 68 m2,
» Engine power: 93kw/2200rpm Cummins,
» Motor power:75 kw ABB*2.
Features
- 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.
- Widest range of automatic drilling functions helps to achieve reduced overbreaking with maximised pull-out per blast
- Dual control option for tough and intensive multi-task usage -drill can be used for both ground support and standard face drilling purposes
Technical Specifications
| Hydraulic Drifter/Rock Drill | Control System |
| Type | HC95LM | Anti-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 |
