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Designed for flexibility and productivity, the ZJ21 is a jumbo drill on a first-ever common-carrier platform. The controls and boom let you convert your jumbo to a bolter, or vice versa. The ZJ21 also offers excellent useable coverage in a small jumbo platform.
*Higher uptime based on factors that include optimizing drifter and feed service intervals, ground level-maintenance and a boom geometry that limits damage to the front-end
| Jumbo hydraulics | Variable displacement piston pumps with load-sensing, closed-circuit design for bolter head and boom movements. |
| Controls | Intelsense control system incorporating these features: collaring, anti-jamming, automatic water monitoring with feed return should low pressure be encountered, auto return to start position following hole completion, and control levers for operating percussion, rotation and feed. |
| Feed position | Inline |
| Drill | |
| Komatsu | JZD10 (10 kW), JZD12 (12 kW) or JZD21 (21kW) |
| Leveling jacks | |
| Front (standard with unit) | 2 |
| Rear (standard with unit) | 2 |
| Jumbo hydraulics | Variable displacement piston pumps with load-sensing, closed-circuit design for bolter head and boom movements. |
| Controls | Intelsense control system incorporating these features: collaring, anti-jamming, automatic water monitoring with feed return should low pressure be encountered, auto return to start position following hole completion, and control levers for operating percussion, rotation and feed. |
| Feed position | Inline |
| Drill | |
| Komatsu | JZD10 (10 kW), JZD12 (12 kW) or JZD21 (21kW) |
| Leveling jacks | |
| Front (standard with unit) | 2 |
| Rear (standard with unit) | 2 |
| Boom quantity 1 | |
| Boom coverage (height) | 6.20 m |
| Boom coverage (width) | 6.50 m |
| Boom extension | 1 400 mm |
| Feed extension | 1 262 mm |
| Guide rollover | 360° |
| Available feeds | |
| Fixed 8 steel | 2 438 mm |
| Hole depth | 2 164 mm |
| Fixed 10 steel | 3 048 mm |
| Hole depth | 2 768 mm |
| Fixed 12 steel | 3 658 mm |
| Hole depth | 3 378 mm |
| Fixed 14 steel | 4 267 mm |
| Hole depth | 3 988 mm |
| Fixed 16 steel | 4 879 mm |
| Hole depth | 4 598 mm |
| Telescopic 8-12 steel | 2 438 - 3 658 mm |
| Hole depth | 3 378 mm |
| Telescopic 8-14 steel | 2 438 - 4 267 mm |
| Hole depth | 3 988 mm |
| Boom quantity 1 | |
| Boom coverage (height) | 18 ft. |
| Boom coverage (width) | 23 ft. 1 in |
| Boom extension | 55 in |
| Feed extension | 50 in |
| Guide rollover | 360° |
| Available feeds | |
| Fixed 8 steel | 8 ft. |
| Hole depth | 7 ft. 1 in |
| Fixed 10 steel | 10 ft. |
| Hole depth | 9 ft. 1 in |
| Fixed 12 steel | 12 ft. |
| Hole depth | 11 ft. 1 in |
| Fixed 14 steel | 14 ft. |
| Hole depth | 13 ft. 1 in |
| Fixed 16 steel | 16 ft. |
| Hole depth | 15 ft. 1 in |
| Telescopic 8-12 steel | 8 -12 ft. |
| Hole depth | 11 ft. 1 in |
| Telescopic 8-14 steel | 8 -14 ft. |
| Hole depth | 13 ft. 1 in |
| Engine | Cummins QSB3.3 |
| Certification | EPA Tier 3, MSHA |
| Ventilation | OHSA@100 CFM/HP = 9 900 CFM MSHA-07-ENA110017 = 4 000 CFM |
| Displacement | 3.3 L |
| Output | 74 kW @ 2 600 rpm |
| Maximum torque | 415 Nm @ 1 600 rpm |
| Cooling type | Water cooled, charge air cooled |
| Engine | Cummins QSB3.3 |
| Certification | EPA Tier 3, MSHA |
| Ventilation | OHSA@100 CFM/HP = 9,900 CFM MSHA-07-ENA110017 = 4,000 CFM |
| Displacement | 3.3 L |
| Output | 99 HP @ 2,600 rpm |
| Maximum torque | 306 ft.-lbs. @ 1,600 rpm |
| Cooling type | Water cooled, charge air cooled |
| General | Variable displacement piston pump with load-sensing, closed center circuit design for optimal efficiency. |
| Oil tank volume | 180 L |
| Tank filling | Manual pump |
| Tank filling optional | Electric pump, Wiggins |
| Steering hydraulics | Variable displacement piston pump with load-sensing, closed center circuit design. Stick steering with a direct-acting control valve. Two double-acting steer cylinders. |
| Brake system | Totally enclosed service brake is hydraulically-applied, spring-released on front and rear axles with automatic brake application |
| General | Variable displacement piston pump with load-sensing, closed center circuit design for optimal efficiency. |
| Oil tank volume | 48 gal |
| Tank filling | Manual pump |
| Tank filling optional | Electric pump, Wiggins |
| Steering hydraulics | Variable displacement piston pump with load-sensing, closed center circuit design. Stick steering with a direct-acting control valve. Two double-acting steer cylinders. |
| Brake system | Totally enclosed service brake is hydraulically-applied, spring-released on front and rear axles with automatic brake application |
| Alternator | 24V/120A |
| Batteries | 2 x 12 volts |
| Starter | 24V heavy duty |
| Tram lights | 2 front/2 rear |
| Drill lights | 4 front |
| Alternator | 24V/120A |
| Batteries | 2 x 12 volts |
| Starter | 24V heavy duty |
| Tram lights | 2 front/2 rear |
| Drill lights | 4 front |
| Canopy | FOPS/ROPS certified |
| Seat | Mechanical suspension seat |
| Canopy | FOPS/ROPS certified |
| Seat | Mechanical suspension seat |