The P&H 320XPC is the preferred choice for large-diameter blasthole drilling in extremely difficult rock conditions. The electric main power and carriage provides enough torque and bit loading to drill in these tough conditions.

Working Ranges

 

Hole diameter	270 mm to 444 mm	10 5/8 in. to 17 1/2 in.
Single-pass hole depth (maximum) Standard: Optional:	19.8 m 21.3m	65 ft. 70 ft.
Multi-pass hole depth (maximum) Single pipe rack: Dual pipe rack:	39.6 m 59.4 m	130 ft. 195 ft.
Maximum bit loading	68,038 kg	150,000 lbs.

 

Mast

 

Construction	Lattice-type using alloy steel structural shapes
Mast Standard: Optional:	19.81 m 21.3 m	65 ft. 70 ft.
Raising and lowering Two hydraulic cylinders (Standard diameter)	267 mm	10.5 in.

 

Pipe Handling

 

Type	Parallelogram-style pipe rack, one rack is standard
Pipe size (diameter)	235-346 mm	9.25-13.625 in.
Options	Additional pipe rack, up to two total
Auxiliary equipment	Standard deck wrench
Auxiliary winch (capacity)	8,164 kg	18,000 lbs.
Breakout wrench	P&H SureWrench

 

Lower/Propel

 

Crawler type	Heavy-duty lug and tumbler drive system Joy Global design
Shoe width (diameter) Standard: Optional:	914 mm (36 in.) 117 mm (44 in.)
Propel machinery	Dual hydrostatic planetary drive with spring set Hydraulic release break 231kw (310 hp)
Propel speed (maximum) High: 60 Hz 50 Hz Low: 60 Hz 50 Hz	1.61 kph 1.28 kph 0.97 kph 0.80 kph	1.0 mph 0.8 mph 0.6 mph 0.5 mph
Maximum grade	20%
Take-up adjustment	Jack and shim

 

Hydraulic System

 

Main system	Closed loop design utilizing: dual variable-displacement piston pumps for propel
Auxiliary system	Open loop design utilizing: vane pumps for mast raising, machine leveling, and pipe handling
Control valves	Manifold-mounted electro-hydraulic, PLC-controlled discrete 24V DC solenoid
Hydraulic lines	Extensive use of high-pressure steel tubing
Filtration	3-micron return filters 5-micron high-pressure filters 3-micron charge filters Suction strainers

 

Hoist/Pulldown

 

Design	DC electric motor-driven chainless rack-and-pinion design
Bit loading (maximum)	68,038 kg	150,000 lbs.
Drill feed rate (up to)	4.9 m/min	16 ft/min
Hoist rate (up to)	37.0 m/min	105 ft/min

 

Rotary Machinery

 

Design	Dual DC P&H electric motors Independent ABB DCS-800 drives control (master/follow drive topology) Can be run as single rotary motor during service/repairs
Rotation speed	0-119 RPM
Maximum torque	Up to 33,895 Nm (25,000 ft-lbs) for standard gear ratio

 

Air System

 

Gardner-Denver SSY Series oil-flooded screw type
Available volumes Standard:	97 m3/min	3,450 cfm*
Sullair oil-flooded screw type
Available volumes Standard:	109 m3/min	3,850 cfm*
Operating pressure	448 kPa	65 psi
Air filters	Dual Donaldson two-stage, dry type (Gardner Denver) Three Donaldson two-stage, dry type (Sullair)

* Nominal air volume. Actual values may vary according to application.

 

Electrical System

 

Incoming power supply voltage 60 Hz 50 Hz	4160V / 7200V 3-phase 3300V, 5500V, 6000V, 6600V, or 7200V 3-phase
Recommended supply transformer	Minimum 1.5 MVA continuous 6MVA minimum Short circuit at drill
High voltage switchgear	External disconnect at trail cable junction box High-voltage load break disconnect High-voltage vacuum contactor for main drive motor/drive
Main drive motor Standard: Optional:	522 kW 746 kW		700 hp 1,000 hp
VFD compressor oil cooler fan	22.4 kW		30 hp
Machinery house fans (2x):	5.6 kW		7.5 hp
Hoist blower motor	0.75 kW		1.0 hp
Auxiliary hydraulic pump	1.1 kW		1.5 hp
Compressor oil circulation pump	14.9 kW		20 hp
Cable reel hydraulic pump motor	3.7 kW		5 hp
Water injection pump motor	0.75 kW		1.0 hp

 

Overall Dimensions

 

Width, overall	8.51 m	27 ft. 11 in.
Height, mast up	30.6 m	100 ft. 6 in.
Height, mast down	10.2 m	33 ft. 6 in.
Length, mast up	18.50 m	60 ft. 8 in.
Length, mast down	32.88 m	107 ft. 10 in.
Overall width of crawlers	6.1 m	20 ft.
Overall length of crawlers	7.3 m	24 ft.
Width of jacks	4.6 m	15 ft. 2 in.
Length between jacks	10.3 m	33 ft. 7 in.
Height to top of operator cab	4.86 m	15 ft. 11 in.

 

Weights (Approximate)

 

Operating weight (maximum)	181,437 kg	400,000 lbs.
Shipping weight with mast	153,949 kg	339,400 lbs.
Ground-bearing pressure for track pads 914 mm (36 in.) shoes 117 mm (44 in.) shoes	200 kPa 156 kPa	29.0 psi 22.6 psi
Ground-bearing pressure for jacks Standard size: Optional size:	890 kPa 317 kPa	129 psi 46 psi

 

Leveling Jacks

 

Cylinders	Four (4) 254mm (10 in.) diameter x 1,676 mm (66 in.) stroke
Jack pads Diameter: Standard: Optional: Ground pressure: Standard: Optional:	762 mm 1,270 mm 840 kPa 317 kPa	30 in. 50 in. 129 psi 46 psi
Auto level	Standard feature

 

Operator’s Cab

 

Type	Rear-mounted with vibration and noise suppression
Noise	< 80 dB while drilling
Controls	PLC controlled, backlit for night operation
Glazing	Shatter-resistant, laminated glass on all sides Roof window with guard
Climate control	Mine Air Systems or Bergstrom* HVAC unit providing pressurization and filtration

 

 * Bergstrom trademark is the property of the brand’s owner.

Electrical Control Systems

• Centurion Supervisory Controller for direct integrated communication with motor drives, giving precise motor control
• Profibus communication protocol, providing seamless integration with all drill subsystems
• Graphical User Interface displaying drill status, troubleshooting information, and production drill monitoring data

Lighting

• LED floodlights for work and area lighting

Optional Equipment

• 100A welding outlet
• 600V / 100A auxiliary outlets
• Auxiliary compressor
• Bit lubrication
• Cable reel
• Cable reel lowering system
• Cold weather package
• Deck bushing (sleeve or roller type)
• Deck-mounted jib crane
• Fire suppression
• Hydraulic rear dust curtain
• Modular and Terrain interface package*
• PreVail remote health monitoring
• Remote propel control
• Shock sub adaptor
• Soft start transformer
• Stand-alone welder
• Tow package
• Wiggins “Fastfil” system*

* Modular, Terrain and Wiggins are not registered trademarks of Joy Global Inc. or any of its affiliates.