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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.
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  • Features
  • Specifications
  • Options
  • Works With
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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

Hole DepthHole Depth
Drill Rod/Core BarrelMetric (Meters)U.S. (Feet)
UpHorizontalDownUpHorizontalDown
ARQTK500950850164031172789
BRQTK360700500187016401804
BQ/BQ-U320580460105019031509
NQ/NQ-U1803002605911706853
NQ/NQ-U8014060262459197
NoteDepth capacity includes allowance for force required to break core using 10 MPa rock strength
The figures in this table have been calculated, based on field experiences and may be reasonably expected. Actual drilling capacity will depend on in-hole tools, conditions, drilling techniques and equipment used. depth ratings include allowances for breaking of the core (rock strength 10MPa). down hole conditions may result in depth capacity variations

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 bush
60.0 mm (2.86 in)
Diameter corresponding to the
ID of the LTK60 guide bush
97.0 mm (3.82 in)
Diameter corresponding to the
ID of the HQ
TM
guide bush
97.0 mm (3.82 in)
Diameter corresponding to the
ID of the HQ
TM
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* (16600 lbf*)
Forward and reverse rotation
60.0 kN* (13300 lbf*)
80.0 kN* (17985 lbf*)80.0 kN* (17985 lbf*)
Max. rated static torsional holding capacity520 N-m (383 lbf*)1670 N-m (1230 lbf*)Forward and reverse rotation
3900 N-m (2870 lbf*)
Forward and reverse rotation
3900 N-m (2870 lbf*)
*At 7 MPa (1015 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.

Weights

Metric U.S.
Feed frame 650 kg 1430 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 1400 kg 3080 kg

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

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 Pump Triplex 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.

Fluroescent 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.
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