Blasthole drilling rig ZT44

crawlerdown-the-holeCUMMINS

Overview
The ZT44 is a down-the-hole track-mounted drill rig engineered for mining-duty blasthole operations. It combines a high-horsepower power unit with a large-capacity dual-pressure compressor and purpose-built structures to maintain continuous production across varying rock conditions.

Key product description
The ZT44 offers adaptable drilling performance for pre-split, production and auxiliary blast-hole tasks. Designed for 24/7 operation, it supports large-hammer drill sizes and sustained duty cycles while preserving service access and operator visibility.

Main use and benefits

• Versatile drilling across pre-split, production and auxiliary applications on site
• Robust core structures and propulsion suited to mining environments
• Designed for continuous 24/7 production to maximize uptime and output

Features and benefits

• Dual-pressure air compressor: High- and low-pressure settings to match changing rock hardness; supports up to 8.5‑inch hammers and challenging elevation performance.
• High tractive force & independent oscillating undercarriage: Improved maneuverability on uneven grades and stability for steep or irregular terrain.
• Four infrared night vision cameras: Integrated video system with LED illumination for safer, extended night operations.
• Compact design: Reduced footprint for effective drilling in confined areas while delivering production comparable to larger machines.
• Service accessibility: Wireless remote pendant, easy-access walkways and unobstructed operator entry to reduce mean time to repair.
• Optimum heat mitigation: Dedicated heat-exchange unit enabling operation up to 131°F (50°C) while maintaining serviceability.

Resources / Documents available on product page

• Brochure (PDF)
• Spec sheet (PDF)
• Press release
• Financing information

Technical tables / summarized specifications
Basic product identifiers
Model: ZT44
Category: Blasthole drills — Track drill

Performance summary (displayed values)
Horsepower (HP): 800 HP @ 2,100 rpm
Horsepower (kW): 597 kW @ 2,100 rpm
Hole range (in): 5.5 - 8.5
Hole range (mm): 140 - 220
Compressor (CFM @ 350 psi): 1,360 (stated as a performance figure)

Working ranges (table)
Hole size (mm): 114 - 216
Hole size (in): 4.5 - 8.5
Single pass depth (ft): 22
Single pass depth (m): 6.7
Maximum depth - 6 + 1 configuration (m): 42.7
Maximum depth - 6 + 1 configuration (ft): 140
Maximum depth - 4 + 1 configuration (ft): 100
Maximum depth - 4 + 1 configuration (m): 30.5
Hammers (in): 4 - 8
Hammers (mm): 102 - 203
Drill pipe (in): 4 - 5.5
Drill pipe (mm): 102 - 127

Pipe handling
Carousel capacity - 4 + 1 configuration (mm): Pipe diameter > 114 mm
Carousel capacity - 4 + 1 configuration (in): Pipe diameter > 4.5 in
Carousel capacity - 6 + 1 configuration (mm): Pipe diameter ≤ 114 mm
Carousel capacity - 6 + 1 configuration (in): Pipe diameter ≤ 4.5 in

Overall dimensions (table)
Shipping dimensions (height x width x length) (m): 3.51 x 2.89 x 1.05
Operating height, mast vertical (m): 11.6
Operating height, mast vertical (ft): 37 ft. 11 in
Operating weight (maximum) (lbs): 85,000
Operating weight (maximum) (kg): 38 555

Power unit
Diesel engine/model (metric): Non-reg. T2 and T4
Diesel engine/model (imperial): Non-reg. T2 and T4

Electrical and electro-hydraulic control system
Electrical (V): 24 V
Electro-hydraulic control system: Variable displacement, load sensing pumps

Feed / Mast / Boom
Pull down force (lbs): 12,000
Pull down force (kN): 53.4
Pull back (lbs): 12,000
Pull back (kg): 53.4
Boom positioning - swing (deg): Left 10° / Right 18°
Boom positioning - tilt (deg): 10° below to 35° above horizontal
Mast positioning (deg): +16 to -45 from vertical
Rotation pin #1: Left/right -20° to +45° from vertical
Rotation pin #2: Left/right +45° to -5° from horizontal

Engine details
Cummins QSK19, Tier 2: HP mode Tier 2 (HP) 764; HP mode Tier 2 (kW) 570; LP mode Tier 2 (kW) 597; LP mode Tier 2 (HP) 800
Cummins QSK19, Tier 4 final: HP mode Tier 4 (kW) 563; HP mode Tier 4 (HP) 755; LP mode Tier 4 (kW) 516; LP mode Tier 4 (HP) 692

Lower works and propel
Ground clearance (in): 15
Ground clearance (mm): 381
Traction force (lbs): 50,000
Traction force (kN): 222.4
Travel auto two-speed (mph): 1.86
Travel auto two-speed (km/h): 3
Gradeability: 30% (17 degrees)
Oscillation (degrees): ±8

Rotary head
Rotation head speed (rpm): 116
Rotation head torque (lbf-ft): 3,983
Rotation head torque (kN-m): 5.4

Fluids / maintenance
Cooling system: Radiator, compressor, ATAAC (air-to-air aftercooler)
Fuel tank capacity (standard) (gal): 234
Fuel tank capacity (standard) (L): 886
Hydraulic tank capacity (L): 507
Hydraulic tank capacity (US gal): 134
Water tank capacity (standard) (gal): 1,060
Water tank capacity (standard) (L): 280
Footnote: Expanded 1,287 L (340 gal) fuel tank and 568 L water tank options available in 2024/25 for some configurations.

Air compressor (modes)
HP mode: 33.5 CMM @ 34.5 bar (1,182 CFM / 500 psi) @ 1,800 rpm
LP mode: 39.1 CMM @ 24.2 bar (1,382 CFM / 350 psi) @ 2,100 rpm

Additional features (selected)

• ROPS/FOPS certified cab
• <80 dBA cab noise level
• CANbus joystick controlled
• Automatic constant rotation power control
• Centralized hydraulic test station
• Hole alignment and depth system
• Dual engine and compressor control
• Wireless remote control for consumable changes
• Pressure-less quick fuel system
• Fixed rock guard for main cabin and roof windows

Caractéristiques / spécifications techniques

• Model: ZT44
• Category: Blasthole drills — Track drill
• Engine: Cummins QSK19 (Tier 2 or Tier 4 options)
• Power: up to 800 HP (LP mode) / 597 kW @ 2,100 rpm (LP)
• Hole range: 4.5 - 8.5 in (114 - 216 mm)
• Max single-pass depth: 22 ft (6.7 m)
• Max depth (6+1): 140 ft (42.7 m)
• Compressor performance: LP mode ~1,382 CFM @ 350 psi / HP mode ~1,182 CFM @ 500 psi (mode-dependent)
• Operating weight (max): ~85,000 lbs (38,555 kg)
• Fuel tank (std): 234 gal (886 L)
• Hydraulic tank: 507 L (134 US gal)
• Water tank (std): 280 L (1,060 gal indicated in imperial value on page)