LM55 UNDERGROUND coring DRill
Technical Overview
Copyright2011 BoartLongyear. Tous droits rservs.
Copyright 2011 Boart Longyear. All rights reserved.
LM55 MODULAR CORE DRILL
The LM55 is a compact underground diamond coring drill rig
suited for drilling short holes. The rig is capable of drilling with
conventional or wireline drilling methods.
Equipped with a 40kN feed frame, the LM55 drill provides high
pullback force and a relatively quick rod-handling rate. The feed
frame is available in two different sizes to suit overall operating
conditions.
Its compact size and power make it a versatile drill ideal for
performing in locations where space is at a premium. It is
modular in design with a number of options that make it easy
to tailor to specific needs and to upgrade when requirements
change. With the assistance of a compact 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.
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
5
1
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)
Copyright 2011 Boart Longyear. All rights reserved.
Semi-automated rod handler
(optional) makes handling of rods
safer and easier
technical information
Copyright 2011 Boart Longyear. All rights reserved. "Q" is a trademark of Boart Longyear
Drill Depth Guidelines
Drill Rod/Core
Barrel
Hole Depth
Hole Depth
Metric
U.S.
Up
Horizontal
Down
Up
Horizontal
Down
ARQTK
500
950
850
1640
3117
2789
BRQTK
360
700
500
1870
1640
1804
BQ/BQ-U
320
580
460
1050
1903
1509
NQ/NQ-U
180
300
260
591
1706
853
HQ/HQ-U
80
140
60
262
459
197
Depth capacity includes allowance for force required to break core using 10
MPa rock strength.
The figures in this table has 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.
Note
Drill Specification:
Feed Frame (400 Series)
Metric
U.S.
Feed Stroke
1700 mm
3.6 ft
Max. rated pushing force
42 kN @ 26 MPa
9440 lbf @ 3770 psi
Max. rated pulling force
40.3 kN @ 28.5 MPa
9060 lbf @ 3770 psi
Rated carriage speed
0.5 m/s per complete cycle
1.64 ft/s per complete cycle
Normal rod handling speed
Approximately 15 m/min.
Approximately 50 ft/minute
Note
Feed cylinder cushioned at both ends. dual load holding valves
Chuck and Rod Holder
BQTM Chuck
Maximum opening
60.0 mm (2.86 in)
Diameter corresponding to the
ID of the PQTM guide bush
Type
Closed hydraulically
Opened mechanically
Automatic synchronization
with rod holder
Jaws
3 (with tungsten carbide inserts) 2 (with tungsten carbide inserts)
Max. rated axial holding capacity
Forward and reverse rotation
75.0 kN* (16600 lbf*)
Forward and reverse rotation
60.0 kN* (13300 lbf*)
520 N-m (383 lbf*)
1670 N-m (1,230 lbf*)
Max. rated static torsional
holding capacity
"*"
60.0 mm (2.86 in)
Diameter corresponding to the
ID of the HQTM guide bush
BQTM Rod Holder
Closed mechanically
Opened hydraulically
Automatic synchronization with
chuck manual overdrive
At 7 MPa (1015 psi) with new jaws and rods
HQ Chuck
Maximum opening
97.0 mm (3.82 in)
Diameter corresponding to the
ID of the HQ guide bush
HQ Rod Holder
97.0 mm (3.82 in)
Diameter corresponding to the
ID of the PQ guide bush
Type
Closed hydraulically
Opened mechanically
Automatic synchronization
with rod holder
Closed mechanically
Opened hydraulically
Automatic synchronization with
chuck manual overdrive
Jaws
3 (with tungsten carbide inserts) 2 (with tungsten carbide inserts)
Max. rated axial holding capacity 80.0 kN* (17985 lbf*)
80.0 kN* (17985 lbf*)
Max. rated static torsional
holding capacity
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
Copyright 2011 Boart Longyear. All rights reserved.
Chuck and Rod Holder
HQTM Drill Head
Forward Rotation
Metric
U.S.
Chuck Speed
1680 RPM, continuously variable. Speeds will vary with oil type
and temperature are only approximate
Chuck torque output
800 N-m @ stall
590 lb-ft @ stall
Reverse Rotation
Chuck Speed
80 RPM, fixed to help prevent rod thread damage
Chuck torque output
1825 N-m
1350 lb-ft
HQTM Drill Head, HI Torque
Forward Rotation
Metric
U.S.
Chuck Speed
1330 RPM, continuously variable. Speeds will vary with oil type
and temperature are only approximate
Chuck torque output
1600 N-m @ stall
1180 lb-ft @ stall
Reverse Rotation
Chuck Speed
100 RPM, fixed to help prevent rod thread damage
Chuck torque output
3545 N-m
2615 lb-ft
Copyright 2011 Boart Longyear. All rights reserved.
technical information
Hydrostatic Pumps
Main Pump
All drill functions
Type
Variable displacement, axial piston w/pressure compensated
load sensing control
Manufacturer
Rexroth (Hydromatik Gmbh)
28.5 MPa, forward rotation,
Maximum pressure operating
reverse rotation and rod
conditions as used on LM55 drill:
handling
Recirculation Pump
4,130 PSI, forward rotation,
reverse rotation and rod
handling
Oil cooling and charge pump
Type
Gear, fixed displacement
Manufacturer
4.51 kN
Maximum pressure operating
1-1.5 Bar
conditions as used on LM55 drill:
1,490 RPM @ 50 Hz
Normal Speed
1,790 RPM @ 60 Hz
Hydraulic Tank Volume
60 L
1015 lb
14.5-21.8 PSI
15.8 US Gal.
Wireline Hoist (optional)
Type
All hydraulic, with proportional spooling control
Power up, power down, hydraulically locked in neutral
Free wheel override, chain driven spooling device.
Line Pull
Bare Drum 11.77 kN
2,649 lb
Full Drum 4.51 kn
1,015 lb
Line Speed
Bare Drum 0 - 100 m/min
328 ft/min
Full Drum 0 - 254 m/min
833 ft/min
Drum Capacity
5 mm 1,400 m
4,600 ft
6 mm 1,000 m
3,280 ft
1/4" 895 m
2,930 ft
Feed Frame (400 Series)
Feed Frame
Weight: 650 kg (1,430 lbs)
Rotation Unit w/chuck
Weight: 235 kg (517 lbs)
HQ Rod Clamp Assembly
Weight: 75 kg (165 lbs)
Copyright 2011 Boart Longyear. All rights reserved.
DIMENSIONS AND WEIGHTS
a = 2,805 mm (110.50 in)
b = 1,700 mm (67.00 in)
c = 3,493 mm (137.50 in)
d = 531 mm (21.00 in)
e = 748 mm (28.50 in)
Control Panel
Weight: 46 kg (101 lbs) w/o hoses
Add 42 kg (92 lbs) for hoses
a = 575 mm (23.00 in)
b = 521 mm (20.50 in)
c = 480 mm (19.00 in)
Power Pack
Weight: 1,400 kg (3,080 lbs)
Includes electric motor and starter,
but without towing group
a = 1,318 mm (52.00 in)
b = 730 mm (29.00 in)
c = 1,526 mm (60.00 in)
d = 1,033 mm (41.00 in)
e = 3,893 mm (153.25 in)
f = 2,230 mm (87.75 in)
*Dimensions and weights may vary on options and should be checked before crating or lifting.
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Copyright 2011 Boart Longyear. All Rights Reserved.
MINING AND EXPLORATION DRILLING PRODUCTS
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Surface Coring Rigs
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