drilling rig specifically designed for rotary action drilling of blastholes up to amaximumdepth of 180
ft. (54.9 meters) and a maximum hole diameter of from 5 in. to 9 in. (127 mm to 228 mm). The
standard DM45/LP utilizes a diesel engine to drive the air compressor and hydraulic system.
Operation of the drill is performed using electric over hydraulic controllers ergonomically located so
that the operator faces the drill centralizer while drilling. The DM45/LP comes equipped with an
asymmetrical rotary screw air compressor.
The DM45/HP (High Pressure) is a crawler mounted, hydraulic tophead drive, multi--pass rotary
drilling rig specifically designed for rotary/percussive action drilling of blastholes up to amaximum
depth of 180 ft. (54.9 meters) and a maximum hole diameter of from 5 in. to 7 in. (127 mm to 203
mm) for DHD (down the hole hammer) drilling using high pressure compressed air. The standard
DM45/HP utilizes a diesel engine to drive the air compressor and hydraulic system. Operation of
the drill is performed using electric over hydraulic controllers ergonomically located so that the
operator faces the drill centralizer while drilling. The DM45/HP comes equipped with an
asymmetrical rotary screw air compressor.
The DM50/LP (Low Pressure) is a crawler mounted, hydraulic tophead drive, multi--pass rotary
drilling rig specifically designed for rotary action drilling of blastholes up to amaximumdepth of 180
ft. (54.9 meters) and a maximum hole diameter of from 7--7/8 in. to 9--7/8 in. (200 mmto 251mm).
The standard DM50/LP utilizes a diesel engine to drive the air compressor and hydraulic system.
Operation of the drill is performed using electric over hydraulic controllers ergonomically located so
that the operator faces the drill centralizer while drilling. The DM50/LP comes equipped with an
asymmetrical rotary screw air compressor.
The DML is a crawler mounted, hydraulic tophead drive, multi--pass rotary drilling rig specifically
designed for production blasthole drilling to depths of 180 ft. (54.9m) with a 30 ft. (9.1m) drill pipe
change. A 35 ft. (10.7m) steel change is also available to handle single pass drilling requirements
to 35 ft. (10.7)m). Various carousel capacities are also available for the 35 ft., (10.7m) option.Hole
size range for rotary drilling applications is nominally 6 in. to 10--5/8 in. (152mm to 270 mm).
For DHD drilling with the high pressure air option, nominal hole size range is 6 in. to 9--7/8 in. (152mm to 250mm). Feed pressure generates a bit load force of up to 60,000 lb. (27,216 kg). The standard DML utilizes a diesel engine to drive the air compressor and hydraulic system.Operation of the drill is performed using electric over hydraulic controllers ergonomically located so that the operator faces the drill centralizer while drilling. The DML comes equipped with an asymmetrical rotary screw air compressor.
To permit optimum performance on a wide range of applications, and site requirements, the
machine is equipped with:
a.) Low pressure compressor installation (DM45LP, DM50LP, DML/LP)
b.) High pressure compressor installation (DM45HP, DML/HP)
c.) Dust suppression equipment
d.) Standard 5 drill rod carousel
e.) Operational controls in a sound proofed cab
f.) High gradeability
The propulsion system features independent hydrostatic drive/service braking of each track,
allowing steering by differential operation of the tramming control levers.
Engine
TheMid--Range series blasthole drill rigs use water cooled engines, with direct injection and turbo
chargers.
Electric starting and belt driven alternator battery charging is standard on all drill models.
The drills are equipped with dual system air filtration. Dry type 2--stage air cleaners, with optional
pre--cleaner, respectively provide clean air to the engine and the compressor.
The engine power / rpm is controlled by the engine speed control switch. The engine is shutdown
either by the removable key “ON/OFF” switch or the emergency stop switch.
Main Frame
The drill main frame consists of a track frame which supports the power pack assembly
(engine/compressor/hydraulic pumps), the combined engine radiator/hydraulic oil cooler, drill
tower assembly and three leveling jacks.
Drill Tower
The drill tower assembly features the hydro-- static driven rotary head and the hydraulic drill feed
systems. A standard 5 drill rod carousel can be controlled from the operators console to provide
safe and easy multi--pass drilling.
By using the angle drilling accessories, hole can be drilled at 5 degree increments from vertical up
to 30 degrees from the vertical.
Controls
All of the controls are positioned for operator convenience in the operator’s cab. Full details are
provided in section 4.
Tramming (Propelling)
Each track is provided with direction (Forward and Reverse) speed control leverswhich control the
tramming speed. This system also provides service braking by moving the respective levers
towards the ’STOP’ position.
Steering
The drill can be steered by adjusting the speed of one track relative to the other.
Braking
Service braking is effected by moving the tramming control lever towards the “STOP” position.
Because the LH and RH track systems are independently controlled, one track acts as secondary
braking for the other.
Parking brakes are incorporated into each track motor assembly and are fail--safe, hydraulically
released, spring applied. These brakes will therefore be applied in the event of loss of brake
release hydraulic pressure due to:
a.) Pressing a RED emergency stop switch
b.) Turning the main key operated “ON/OFF” switch to OFF position.
c.) Hose failure resulting in loss of charge pressure, when themain pumps will cut off the flow
to the tracks.
Operator’s Cab
The operator’s FOPS cab is designed for convenience, ease of control, comfort and safety while
providing maximum visibility to the work area. The operator’s station is sound insulated. A fully
adjustable suspension--mounted seat is standard. Remote Tramming Control is available at Cab
location.
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