KOMATSU ZB21 (Underground Hard Rock Bolters)
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) | 11-13.5 |
| Engine Displacement(L) | 6.692 |
| Emisson | Tier3 |
| Fuel Tank(L) | 280 |
| Hydraulic Tank(L) | 225 |
| Travel Speed(km/h) | 11.2 |
| Operating Weight(kg&ton) | 14900 |
| Specifications(mm) | 7620×1680×2795 |
| 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 climbing gradient | 28% |
| Applicable rock bolt length | 5~8ft (1.52~2.44m) |
| Min working height | 2893mm |
| Max vertical working height | 6370mm |
| Boom | 360° full swing single boom |
Features
Compact Size
Dimension:7620×1680×2795mm, narrow chassis fits narrow underground tunnels; 4WD+4WS for flexible turning.
Wide Working Range
360° swing drill boom, working height:2.89–6.37m, suits 1.52–2.44m rock bolts for roof & side wall support.
Efficient Drilling
Imported hydraulic drifter for fast hard rock drilling; auto bolt feeding, one-operator full-process operation inside cab.
Fuel-saving Power
Cummins QSB6.7 engine, low fuel consumption 6–13.5L/h; 280L fuel tank & 225L hydraulic tank for long continuous shift.
Dual Travel Speed
0–4.5km/h for precise drilling positioning, 0–11.2km/h for quick site transfer, max gradeability 28%.
Rugged & Safe
Explosion-proof design, heavy-duty frame & puncture-resistant tires; open falling-rock protection canopy.
Dual options: diesel / zero-emission battery version for enclosed mine.
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