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    LM™55

    MARKETS: Mineral Exploration

    The LM™55 is a compact drill rig for underground diamond coring. It is equipped with a 40kN feed frame for drilling short holes. Its compact size and power make it a versatile drill to be used in locations where space is a premium. It is modular in design with a number of options which make it easier to tailor to specific needs and to upgrade when requirements change. With the assistance of a positioner and a turntable, the drill is capable of drilling holes in all angles from vertically up to vertically down. The drill uses an electric motor to power the hydraulics on the machine.

    Direct drive feed frame with 40kN pullback and 1.7m standard feed stroke. Optional 1.1m feed stroke for confined spaces.

    • Standard Power Pack with 55kW electric motor. 75kW or 90kW electric motor available as option.
    • Standard Self contained control panel with stand and e-stop.
    • Compact positioner with 360 degree turntable.
    • HQ (BQ™ optional) rotation unit with chuck assembly.
    • HQ (BQ™ optional) rod clamp; spring close and hydraulic open.

    LM™55 Features

    1. Load Sensing Hydraulics

    Load sensing hydraulics maximize efficiency and reduce heat

    2. Proportional Controls

    Proportional controls and lock levers provide optimum control of rpm and feed

    3. High Torque Breakout

    Automated high torque break out device breaks most rod joints automatically

    4. Fail Safe Rod Clamp

    Hydraulic open and spring close rod clamp results in fail safe operation

    5. Direct Coupled Feed Frame

    Direct coupled feed frame results in lower maintenance and smoother feed transmission

    Semi-automated Rod Handling (Optional-not pictured)

    Semi-automated rod handler (optional) makes handling of rods safer and easier

    Drilling Depth Guidelines

    MetricU.S.
    Vertical Depth Capacity250 m (NRQ)*820 ft (NRQ)*
    Drill Rod SizeAQ to PQAQ - PQ
    *The figures in these tables are estimates which have been calculated using the applicable pullback capacity of the drill. Actual drilling results may vary and will depend on in-hole tools, subsurface and other environmental conditions, drilling techniques and equipment used.
    To view additional drill capacity information click here

    Drill Specification

    Feed Frame (400 Series)MetricU.S.
    Feed Stroke1700 mm5.6 ft
    Max. rated pushing force42 kN @ 26 MPa9440 lbf @ 3770 psi
    Max. rated pulling force40.3 kN @ 28.5 MPa9060 lbf @ 3770 psi
    Rated carriage speed0.5 m/s per complete cycle1.64 ft/s per complete cycle
    Normal rod handling speedApproximately 15 m/min.Approximately 50 ft/minute
    NoteFeed cylinder cushioned at both ends. dual load holding valves

    Chuck and Rod Holder

    BQ™ ChuckBQ™ Rod HolderHQ™ ChuckHQ™ Rod Holder
    Maximum opening60.0 mm (2.86 in) Diameter corresponding to the ID of the LTK60 guide bush60.0 mm (2.86 in) Diameter corresponding to the ID of the LTK60 guide bush97.0 mm (3.82 in) Diameter corresponding to the ID of the HQ™ guide bush97.0 mm (3.82 in) Diameter corresponding to the ID of the HQ™ guide bush
    TypeClosed hydraulically
    Opened mechanically
    Automatic synchronization
    with rod holder
    Closed mechanically
    Opened hydraulically
    Automatic synchronization
    with chuck Manual overdrive
    Closed hydraulically
    Opened mechanically
    Automatic synchronization
    with rod holder
    Closed mechanically
    Opened hydraulically
    Automatic synchronization
    with chuck Manual overdrive
    Jaws3 with tungsten carbide inserts2 with tungsten carbide inserts3 with tungsten carbide inserts2 with tungsten carbide inserts
    Max. rated axial holding capacityForward and reverse rotation
    75.0 kN* (16,600 lbf*)
    Forward and reverse rotation
    60.0 kN* (13,300 lbf*)
    80.0 kN* (17985 lbf*)80.0 kN* (17,985 lbf*)
    Max. rated static torsional holding capacity520 N-m (383 lbf*)1,670 N-m (1,230 lbf*)Forward and reverse rotation
    3900 N-m (2870 lbf*)
    Forward and reverse rotation
    3900 N-m (2870 lbf*)
    *At 7 MPa (1,015 psi) with new jaws and rods

    Drill Head

    MetricU.S.
    HQ™ Drill Head
    Forward Rotation
    Chuck Speed1680 RPM, continuously variable. Speeds will vary with oil type and temperature are only approximate
    Chuck torque output800 N-m @ stall590 lb-ft @ stall
    Reverse Rotation
    Chuck Speed80 RPM, fixed to help prevent rod thread damage
    Chuck torque output1825 N-m1350 lb-ft
    HQ™ Drill Head, HI Torque
    Forward Rotation
    Chuck Speed1330 RPM, continuously variable. Speeds will vary with oil type and temperature are only approximate
    Chuck torque output1600 N-m @ stall1180 lb-ft @ stall
    Reverse Rotation
    Chuck Speed100 RPM, fixed to help prevent rod thread damage
    Chuck torque output3545 N-m2615 lb-ft

    Hydrostatic Pumps

    Main PumpAll drill functions
    TypeVariable displacement, axial piston w/pressure compensated load sensing control
    ManufacturerRexroth (Hydromatik Gmbh)
    Maximum pressure operating conditions as used on LM55 drill28.5 MPa, forward rotation, reverse rotation and rod handling4,130 PSI, forward rotation, reverse rotation and rod handling
    Recirculation PumpOil cooling and charge pump
    TypeGear, fixed displacement
    Manufacturer4.51 kN1015 lb
    Maximum pressure operating conditions as used on LM55 drill1-1.5 Bar14.5-21.8 PSI
    Normal Speed1,490 RPM @ 50 Hz
    1,790 RPM @ 60 Hz
    Hydraulic Tank Volume60 L15.8 US Gal.

    CE Certification

    The CE marking certifies that a product meets EU consumer safety, health or environmental requirements.

    Power Pack

    Metric U.S.
    Power 55 kW 74 hp

    Weight

    Metric U.S.
    Feed frame 650 kg 1,430 lbs
    Rotation Unit w/chuck 235 kg 517 lbs
    HQ™ Rod Clamp Assembly 75 kg 165 lbs
    Control Panel w/o hoses 46 kg 101 lbs
    Hoses 42 kg 92 lbs
    Power Pack 1,400 kg 3,080 kg

    Wireline Hoist

    Variable speed hydraulically driven c/w 500 m (1,640 ft) cable
    TypeAll hydraulic, with proportional spooling control power up, power down, hydraulically locked in neutral free wheel override, chain driven spooling device
    Line Pull
    Bare Drum11.77 kN2649 lb
    Full Drum4.51 kN1015 lb
    Line Speed
    Bare Drum0 - 100 m/min328 ft/min
    Full Drum0 - 254 m/min833 ft/min
    Drum Capacity
    5 mm1400 m4600 ft
    6 mm1000 m3280 ft
    1/4"895 m2930 ft

    Sheave/Cover Assembly

    Sheave Assembly Wireline - 1.7m feed frame
    Cover Assembly 1.1m feed frame - Wireline
    Cover Assembly 1.1m feed frame - Conventional

    Guard Assembly

    1.7M Feed Frame
    1.1M Feed Frame

    Hydraulic Hoses

    OptionsDescriptions
    6 metersHydraulic hoses to connect the Control Panel to Power Pack 6m & Power Pack to Feed Frame 9m, all encased is spiral wrap, includes Wireline & Water Pump hoses.
    9 metersHydraulic hoses to connect the Control Panel to Power Pack 9m & Power Pack to Feed Frame 12m, all encased is spiral wrap, includes Wireline & Water Pump hoses

    Pump

    Options Descriptions
    520 Fluid PumpTriplex piston design hydraulic proportional control
    0.76 lpm continuously variable
    3.42 MPa max discharge pressure with relief valve fitted as standard
    535 Water PumpTriplex piston design hydraulic proportional control
    132 L/min continuously variable
    3.42 MPa max discharge pressure with relief valve fitted as standard
    712 Fluid PumpTriplex piston design hydraulic proportional control
    4.46 L/min (1.12 U.S. gpm) continuously variable
    4.8 MPa (700 psi) max discharge pressure with relief valve fitted as standard
    Material Chrome plated brass manifold and Diecast aluminium crankcase

    Jack Legs

    Jack leg kits for Feed Frame positioner enable leveling in uneven ground.

    Wheels

    Toyota 16" wheels with removable stub shafts and forklift slots as standard.

    Towing Group

    Towing group with Removable stub shafts and forklift slots as standard.

    Hydraulic Hose Hooks

    Hooks that allow hydraulic hoses to be wrapped around the power pack. 6 hooks in a set.

    Fluorescent Lights

    2 x Fluorescent lights. Plugs into low voltage outlet on the starter

    Start and Stop Options

    Allows start and stop of electric motor from control panel or other location

    Rod Handler

    Designed with safety in mind the semi automated rod handler has been operating on Boart Longyear™ underground diamond drills. The rod handler reduces operator fatigue, Occupational Health and Safety liabilities and can improve productivity.
    Load rods at the same comfortable height every time independent of drilling angle.
    Reduces the possibility of hand and back injuries.
    Overcomes the need for work platforms - Increases productivity particularly on deep large diameter holes.
    Easily retro-fitted.
    Automated Rod Threading.
    Non intrusive laser guarding.