KOMATSU ZJ21（Underground hard rock drills）
Parameters
| Engine Model | Cummins QSB6.7 |
| Rated Power(kW) | 74 |
| Engine Revolutions(rpm) | 2200 |
| Maximum Torque(N·m) | 432 |
| Inject Type | Electronic Injection |
| Fuel consumption(L/h) | 9.5～12 |
| Engine Displacement(L) | 6.7 |
| Emisson | Tier3 |
| Fuel Tank(L) | 310 |
| Hydraulic Tank(L) | 230 |
| Travel Speed(km/h) | 10.8 |
| Operating Weight(kg&ton) | 16800 |
| Specifications(mm) | 8950×1700×2800 |
| Size Class | Medium |
| Power Type | Diesel |
| Walking Mode | Wheel |
| Country of Origin | Japan |
| Year of Production | 2022 |
| Condition | Used |
| Working Hours(h) | 2000/5000/7000 |
| Price($) | Get the Latest Price from sales via WhatsApp |
| Max gradeability | 27% |
| Drive type | 4WD + 4-wheel steering |
| Standard drifter | JZD27, rated power 27kW |
| Face coverage area | 66㎡ |
| Max feed length | 4.88m |
| Boom | Single boom with 360° full swing |
Features
Compact Underground Design
Size:8950×1700×2800mm, narrow body +4WD&4WS, great mobility in narrow mine drift; 27% max gradeability for rugged underground road.
High Drilling Efficiency
27kW JZD27 hydraulic drifter for fast hard rock drilling; 360° full swing boom, 66㎡ coverage, max feed 4.88m for full-face tunneling.
Dual Travel Speed
0~4.2km/h for precise drilling positioning; 0~10.8km/h for quick site transfer.
Economical Power System
Cummins QSB6.7 Tier3 explosion-proof engine, 310L fuel tank &230L hydraulic tank, fuel consumption 7~15L/h for long continuous shift.
Safe & Durable
Heavy-duty chassis + falling-rock protection canopy; Diesel & zero-emission battery versions available for different mine conditions.
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