ZR77 Blasthole Drills

SPECIFICATIONS

Working ranges

Hole diameter 200 to 270 mm
Maximum single pass 16.8 m
Maximum multi-pass 85 m
Maximum bit loading 34 925 kg

Mast/tower

Mast construction	Structural plate steel
Mast raising cylinders	Hydraulic (2x)
Carriage/rotary head travel	19.1 m
Maximum bit loading	34 925 kg
Mast length (single pass) (multi-pass)	22.9 m 18.6 m
Mast width	1.0 m
Mast depth	1.0 m
Angle drilling (option)	0-30°

Air system

Compressor type	Rotary screw, oil flooded
Standard output	56.6 m3/min
Operating pressure	6.89 bar
Optional output	76.5 m3/min
Operating pressure	6.89 bar
DTH output
(standard)	42.5 m3/min @ 24.13 bar
(optional)	42.5 m3/min @34.50 bar
Compressor control	Electrically actuated, CANbus

Pipe handling

Type

Single-pass: 2 pipe carousel for 33.5 m total depth
Multi-pass: Up to a 6 pipe rotary carousel 85 m total depth

Pipe size
	Carousel capacity	Diameter	Maximum depth
4	219 mm or less	8 5/8 in. or less	61 m
5	219 mm or less	8 5/8 in. or less	73 m
6	194 mm or less	7 5/8 in. or less	85 m

Options
Ability to handle 25 ft. pipe

Fluids/maintenance

Fuel tank capacity (standard) 1 514 L
Fuel tank capacity (optional) 2 366 L
Water tank capacity (standard) 1 514 L
Hydraulic tank capacity 1 136 L
OGL tank capacity 68 L
Feed system

Type Rack and pinion
Pulldown force 302 kN
Hoisting force 302 kN
Carriage speed (maximum) 0 to 48.0 m/min
Motor type (hydraulic) Variable displacement axial piston with integral brake
Power unit

Diesel engine/model Cummins QST30
Power rating 783 kW
Electric option ≥3-phase altering current Secondary voltage (≥24, 12)
Rotary head

Rated power 158 kW
Torque (variable) at 100 rpm 14.9 kN-m
Speed (variable) 200 rpm @ 5 500 ft.-lbs.
Motor type (hydraulic) Variable displacement axial piston
Dust control

Dust curtains (standard)
Electric actuator for dust curtains (optional)
Water injection system (standard)
Preheat system (for water injection)
Dry dust collector (optional)

Lower works and propel

Crawler type	B8 excavator-type
Motor type	Two-speed, variable displacement piston
Low propel speed	0-1.86 kph
High propel speed	0-3.12 kph
Travel stability-mast down, drill string engaged	15° (26%)
Travel stability-mast up, drill string engaged	9° (15%)
Shoe/track pad width (standard)	750 mm
Shoe/track pad width (optional)	900 mm
Ground pressure with standard shoe	126 kPa

DTH drilling
- Up to 203 mm Down-the-hole hammer with 229 mm maximum bit diameter

When you need the lowest cost per meter drilled and blasted, Komatsu rotary drills deliver. Featuring rugged and reliable rotary carriages and enclosed boxer style masts, these machines provide ample torque and bit loading through the tough rock conditions. With maximum bit-loading ranges from 68,039-34,927 kg, Komatsu offers a range of rotary drills for a variety of capacities and applications.