Blasthole drilling rig ZR77

crawlerrotaryCUMMINS

Overview
High-impact productivity with precision control. Designed for consistent performance in tough conditions, the ZR77 is equipped with a robust boxer-style mast and a high-force rack-and-pinion pulldown system. These features combine to maximize torque delivery and bit load, enabling faster cycle times and increased drilling efficiency.

Key features

• High-force rack-and-pinion pulldown: Enables faster cycle times and increased penetration in hard rock; boosts drilling time by up to 12%.
• Automated bit carousel / Auto-bit handling: Minimizes downtime with quick, hands-free bit change-outs; helps maintain efficient fragmentation and hole quality and flex into new hole diameters quickly.
• Boxer-style mast design: Enhances structural durability for improved availability and reduced maintenance overhead.
• Optional remote operation / Drill automation with remote control operation: Single and multiunit high-precision GPS (HPGPS) remote control operation for effective control; helps limit operator exposure and supports zero harm initiatives.
• Auto navigation capability with high-precision GPS (HPGPS): Increases precision of hole locations and allows movement between holes without operator in the cab.
• Intelligent compressor control: Regulates the amount of air into the hole to manage power, fuel consumption and bailing velocity to help lower operating costs.
• Single and multipass angle drilling: Automatic mast positioning and adaptive auto-leveling to perform multiple drilling functions with one rig.

Resources

• Available product documents include a specification sheet, sell sheet, drill automation one-pager and boxer mast / rack-and-pinion sell sheet (product literature and brochures).

Technical specifications

• Product category: Blasthole drills — Rotary drill.
• Model: ZR77.
• Hole diameter (in): 7 7/8 - 10 5/8.
• Hole diameter (mm): 200 - 270.
• Maximum bit loading (kg): 34 925.
• Maximum bit loading (lbs): 77,000.
• Single pass hole depth (ft): 55.
• Single pass hole depth (m): 16.8.
• Maximum multi-pass depth (ft): 280.
• Maximum multi-pass depth (m): 85.
• Power unit — Diesel engine / model (metric): Cummins QST30.
• Power unit — Diesel engine (imperial): Non-reg. T2 and T4.
• Electric option (kv): 6.3.
• Electric option (metric): ≥3-phase alternating current Secondary voltage (≥24, 12).
• Power rating (kW): 783.
• Power rating (HP): 1,050.
• Rotary head — Torque (variable) at 100 rpm (ft-lbs): 11,000.
• Rotary head — Torque (variable) at 100 rpm (kN-m): 14.9.
• Rotary head — Rated power (kW): 158.
• Rotary head — Rated power (HP): 212.
• Rotary head — Motor type (hydraulic): Variable displacement axial piston.
• Rotary head — Speed (variable): 200 rpm @ 5,500 ft.-lbs.
• Feed system — Type: Rack and pinion.
• Feed system — Carriage speed (maximum) (m/min): 0 to 48.0.
• Feed system — Carriage speed (maximum) (ft/min): 0 to 157.5.
• Feed system — Hoisting force (lbf): 67,900.
• Feed system — Hoisting force (kN): 302.
• Pulldown force (kN): 302.
• Pipe handling — Options: Ability to handle 25 ft. pipe.
• Pipe handling — Pipe size 4 carousel capacity (in): 8.62 or less (diameter 8 5/8 or less).
• Pipe handling — Pipe size 4 carousel capacity (mm): 219 or less.
• Pipe handling — Pipe size 5 carousel capacity (in): 8.62 or less (diameter 8 5/8 or less).
• Pipe handling — Pipe size 5 carousel capacity (mm): 219 or less.
• Pipe handling — Pipe size 6 carousel capacity (in): 7.64 or less (diameter 7 5/8 or less).
• Pipe handling — Pipe size 6 carousel capacity (mm): 194 or less.
• Pipe handling — Pipe size 4 maximum depth (ft): 200 (61 m).
• Pipe handling — Pipe size 5 maximum depth (ft): 240 (73 m).
• Pipe handling — Pipe size 6 maximum depth (ft): 280 (85 m).
• Mast / tower — Mast width (m): 1.
• Mast / tower — Mast width (in): 39.4.
• Mast / tower — Mast depth (in): 39.5 (mast depth (m): 1).
• Mast / tower — Carriage / rotary head travel (m): 19.1 (ft: 62.5).
• Mast / tower — Mast length (single pass) (ft): 75 (m: 22.9).
• Mast / tower — Mast length (multi-pass) (ft): 61 (m: 18.6).
• Mast / tower — Angle drilling (option): 0-30°, 5° increments.
• Mast raising cylinders: Hydraulic (2x).
• Air system — Compressor control: Electrically actuated, CANbus.
• Air system — Standard output (CFM): 2,000.
• Air system — Standard output (m^3/min): 56.6.
• Air system — Compressor type: Rotary screw, oil flooded.
• Air system — Operating pressure (psi): 100.
• Air system — Operating pressure (kPa): 689.
• Air system — DTH output standard (psi): 1,500 CFM @ 350 psi.
• Air system — DTH output standard (bar): 42.5 m3/min @ 24.13 bar.
• Air system — Available volumes optional (m^3/min): 109.
• Air system — Available volumes required (kW): 746 main motor.
• DTH drilling — DTH drilling (mm): Up to 203 mm Down-the-hole hammer with 229 mm maximum bit diameter.
• DTH drilling — DTH drilling (in): Up to 8 in Down-the-hole hammer with 9 in maximum bit diameter.
• Working ranges — Single pass depth (ft): 55 (m: 16.8).
• Working ranges — Maximum single pass (ft): 55 (m: 16.8).
• Working ranges — Maximum multi-pass (ft): 280 (m: 85).
• Fluids / maintenance — Fuel tank capacity (standard) (L): 1 514 (gal: 400).
• Fluids / maintenance — Fuel tank capacity (optional) (L): 2 366 (gal: 625).
• Fluids / maintenance — Hydraulic tank capacity (L): 1 136 (US gal: 300).
• Fluids / maintenance — OGL tank capacity (L): 68 (gal: 18).
• Fluids / maintenance — Water tank capacity (standard) (L): 1 514 (gal: 400).
• Fluids / maintenance — Maintenance: Ground level battery and starter isolation; quick fluid service system at ground level for fuel, hydraulic, engine oil, coolant, compressor oil, grease and water; live oil sampling.
• Dust control — Dust curtains: Standard; Electric actuator for dust curtains: Optional; Water injection system: Standard; Preheat system for water injections: Available; Dry dust collector: Optional.