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Blasthole drills
ZR77
Rotary drill
- Hole diameter (in) 7 7/8 - 10 5/8
- Hole diameter (mm) 200 - 270
- Bit loading (kg) 34 925
- Bit loading (lbs) 77,000
- Single pass hole depth (ft) 55
- Single pass hole depth (m) 16.8
Purchase options
Request a quoteThe reliability you need for the productivity you demand
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 77,000 to 150,000 lbs. (68,039-34,927 kg) Komatsu offers a range of rotary drills for a variety of capacities and applications.
- Increase drilling time as much as 12%
- 77,000 lbs. of maximum bit-loading capacity
- Improve availability by 2-5%
- Reduce maintenance costs by 5-10%
Resources
Features and benefits
Robust, solid boxer-style mast construction
To help reduce maintenance time and increase structural reliability, we've engineered an innovative solid boxer style mast.
Intelligent compressor control
This smart feature allows the operator to regulate the amount of air into the hole and helps manage power and fuel consumption. Effectively manage associated bailing velocity as well, which can help lower operating costs.
Auto-bit handling
The innovative auto-bit carousel helps to reduce bit change downtime. This feature also helps to flex into a new hole diameter quickly so operators can seamlessly adapt the drill pattern to quickly reach optimal fragmentation.
Drill automation system with remote control operation
Increase drill utilization, helping to reduce operator inefficiencies and overdrilling. Single and multiunit high-precision GPS (HPGPS) remote control operation for effective control.
Auto navigation capability with high-precision GPS (HPGPS)
This feature increases the precision of hole locations within drill patterns to elevate productivity. It also allows the movement of the drill between holes without the operator inside the cab.
Single and multipass angle drilling
The versatility to allow operators to perform multiple functions with a single drill rig with automatic mast positioning and adaptive auto-leveling.
Specifications
- Full specs
- Crawler type: B8 excavator-type
- Shoe/track pad width (standard)(in): 29.5
- Shoe/track pad width (standard)(mm): 750
- Shoe/track pad width (optional)(in): 35.4
- Shoe/track pad width (optional)(m): 900
- High propel speed (kph): 0-3.12
- High propel speed (mph): 0-1.94
- Low propel speed (kph): 0-1.86
- Low propel speed (mph): 0-1.16
- Travel stability-mast down, drill string engaged: 15° (26%)
- Travel stability-mast up, drill string engaged: 9° (15%)
- Ground pressure with standard shoe (psi): 18.3
- Ground pressure with standard shoe (kPa): 126
- Motor type: Two-speed, variable displacement piston
- Diesel engine/model (metric): Cummins QST30
- Diesel engine/model (imperial): Non-reg. T2 and T4
- Electric option (kv): 6.3
- Electric option (metric): ≥3-phase altering current Secondary voltage (≥24, 12)
- Power rating (kW): 783
- Power rating (HP): 1,050
- Torque (variable) at 100 rpm (ft-lbs): 11,000
- Torque (variable) at 100 rpm (kN-m): 14.9
- Rated power (kW): 158
- Rated Power (HP): 212
- Motor type (hydraulic) for rotary head: Variable displacement axial piston
- Speed (variable): 200 rpm @ 5,500 ft.-lbs.
- Compresor control: Electrically actuated, CANbus
- Standard output (CFM): 2,000
- Standard output (m^3/min): 56.6
- Compressor type: Rotary screw, oil flooded
- Operating pressure (m^3/min): 76.5
- Operating pressure (psi): 100
- Operating pressure (kPa): 689
- Operating pressure (CFM): 2,700
- DTH output optional (bar): 42.5 m3/min @34.50 bar
- DTH output standard (psi): 1,500 CFM @ 350 psi
- DTH output optional (psi): 1,500 CFM @ 500 psi
- DTH output standard (bar): 42.5 m3/min @ 24.13 bar
- Available volumes optional (CFM): 3850
- Available volumes optional (m^3/min): 109
- Available volumes required (HP): 1000 main motor
- Available volumes required (kW): 746 main motor
- Carriage speed (maximum)(m/min): 0 to 48.0
- Carriage speed (maximum)(ft/min): 0 to 157.5
- Hoisting force (lbf): 67,900
- Hoisting force (kN): 302
- Pulldown force (kN): 302
- Pulldown force (lbf): 67,900
- Feed system type: Rack and pinion
- Motor type (hydraulic) for feed system: Variable displacement axial piston with integral brake
- Options: Ability to handle 25 ft. pipe
- Pipe size 4 carousel capacity (in): 8.62 or less
- Pipe size 4 carousel capacity (mm): 219 or less
- Pipe size 5 carousel capacity (in): 8.62 or less
- Pipe size 5 carousel capacity (mm): 219 or less
- Pipe size 6 carousel capacity (in): 7.64 or less
- Pipe size 6 carousel capacity (mm): 194 or less
- Pipe size 4 diameter (in): 8 5/8 or less
- Pipe size 4 diameter (mm): 219 or less
- Pipe size 5 diameter (in): 8 5/8 or less
- Pipe size 5 diameter (mm): 219 or less
- Pipe size 6 diameter (in): 7 5/8 or less
- Pipe size 6 diameter (mm): 194 or less
- Pipe size 4 maximum depth (ft.): 200
- Pipe size 4 maximum depth (m): 61
- Pipe size 5 maximum depth (ft.): 240
- Pipe size 5 maximum depth (m): 73
- Pipe size 6 maximum depth (ft.): 280
- Pipe size 6 maximum depth (m): 85
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Type
- Type: Multi-pass (m): Up to a 6 pipe rotary carousel 85 m total depth
- Type: Multi-pass (ft): Up to a 6 pipe rotary carousel 280 ft. total depth
- Type: Single-pass (ft): 2 pipe carousel for 110 ft. total depth
- Type: Single-pass (m): 2 pipe carousel for 33.5 m total depth
- Mast construction: Structural plate steel
- Carriage/rotary head travel (m): 19.1
- Carriage/rotary head travel (ft): 62.5
- Mast length (single pass)(ft): 75
- Mast length (single pass)(m): 22.9
- Mast length (multi-pass)(ft): 61
- Mast length (multi-pass)(m): 18.6
- Mast width (m): 1
- Mast width (in): 39.4
- Mast depth (in): 39.5
- Mast depth (m): 1
- Angle drilling (option): 0-30°, 5° increments
- Mast raising cylinders: Hydraulic (2x)
- Single pass depth (ft): 55
- Single pass depth (m): 16.8
- Maximum single pass (ft): 55
- Maximum single pass (m): 16.8
- Maximum multi-pass (ft): 280
- Maximum multi-pass (m): 85
- Maximum bit loading (kg): 34 925
- Maximum bit loading (lbs): 77,000
- DTH drilling (mm): Up to 203 mm Down-the-hole hammer with 229 mm maximum bit diameter
- DTH drilling (in): Up to 8 in Down-the-hole hammer with 9 in maximum bit diameter
- Fuel tank capacity (standard)(L): 1 514
- Fuel tank capacity (standard)(gal): 400
- Fuel tank capacity (optional)(gal): 625
- Fuel tank capacity (optional)(L): 2 366
- Hydraulic tank capacity (US gal): 300
- Hydraulic tank capcity (L): 1 136
- OGL tank capcity (L): 68
- OGL tank capacity (gal): 18
- Water tank capacity (standard)(L): 1 514
- Water tank capacity (standard)(gal): 400
- Maintenance: Ground level battery and starter isolation. Quick fluid service system (fuel, hydraulic, engine oil, coolant, compressor oil, grease and water) at ground level. Live oil sampling.
- Dust curtains: Standard
- Electric actuator for dust curtains: Optional
- Water injection system: Standard
- Preheat system: For water injections
- Dry dust collector: Optional