Atlas Copco Secoroc QLX Series Operator Instructions Manual page 20

Minimum guidelines
for mounting specifications
Torque:
Roughly 500 ft-lb per inch (27 N-m per mm) maximum of bit.
Speed:
10 to 90 rpm
Hold down force:
500 lb per inch (9 kg per mm) of hammer maximum
(i.e. TD60 needs 3000 lb (1360.8 kg)
Hold back force:
Dependent on hole depth and string weight.
Must be capable of maintaining 500 lb per inch (226.8 kg per mm) at
depth.
Operating pressure:
500 psi (34.4 bar) maximum
Volume:
150 - 200 scfm per inch (.165 - .22 m3/min per mm) of hammer
diameter.
Lubrication:
1/3 pint (.16 l) per hour per 100 scfm (2.8 m3/min)
Figure 1. Altitude Correction
Altitude - feet (meters) sea level 0 (0) 2,000 (609.6) 4,000 (1219.2) 6,000 (1828) 8,000 (2438.4) 10,000 (3048)
Atmospheric pressure
PSIA (mm Hg) 14.70 (760.2)
Temperature F (C)
0 (-18) 1.07
20 (-7) 1.05
40 (4) 1.02
60 (16) 1.00
80 (27) 0.98
100 (38) 0.96
120 (49) 0.94
Rock drill oil specifications
Characteristic
Viscosity:
SUS at 100°F (38°C)
SUS at 210°F (99°C)
cST at 104°F (40°C)
cST at 212°F (100°C)
Pour Point, °F (°C) max.
Flash Point, °F (°C) min.
Viscosity Index, min.
Steam Emulsion No. min.
Consistency
Falex Load Test lbs (kg) [min]
Timken E.P. Test lbs (kg) [min]
Super-tac rock drill oil part numbers (not available for the EU market)
1 Gallon 5 Gallon
Grade 3,8 Lit 18,9 Lit
Test reference-ASTM
Test reference - ISO
52334174 52333192
Light
52334182 52333218
Medium
52334190 52333234
Heavy
Extra heavy 52334208 52333259
20
13.66 (706.4) 12.68 (655.7)
0.99 0.92
0.97 0.90
0.95 0.88
0.93 0.86
0.91 0.85
0.89 0.83
0.88 0.81
Test Below 20°F
Procedure (-7°C)
ASTM-D2161 175 min.
ASTM-D2161 46 min.
ASTM-D445 37 min.
ASTM-D445 6 min.
ASTM-D97 -10°F
(-23°C)
370°F
ASTM-D92
(188°C)
90
ASTM-D2270
1200
ASTM-1935-65
Stringy
. . . . . . . . . . . . .
2000 lbs
ASTM-D2670
(907 kg)
30 lbs
ASTM-D2782
(14 kg)
55 Gallon 300 Gallon ISO Grade
207 Lit 1136 Lit (reference)
52333200 52343225 100
52333226 52343233 220
52333242 52323241 460
52333267 52343258 1000
Minimum requirements for
compressor capacity and pressure
The pressure and production developed by a DTH hammer will be
related to the air flow passing through the drill. The pressure and
performance of a DTH hammer is related to the SCFM delivered
by the compressor. To determine what pressure a DTH hammer
will carry (without fluid injection and well oiled) you need to take
into account the actual SCFM (or mass flow) of air delivered by the
compressor. Compressors are rated in ACFM which only equals
SCFM at standard conditions of sea level and 60 F (16 C) inlet
temperature. As the inlet air density either increases or decreases
due to temperature and altitude changes, the SCFM delivery of a
compressor will change. The pressure and performance of a DTH
hammer are related to the SCFM delivered by the compressor.
Figures 4 and 5 show the relationship of pressure and flow for all QLX
hammers running oiled with no water injection in a shallow hole.
The Figure 1 shows compressor correction factors for typical oil
flooded screw compressors. The rated delivery of a compressor must
be multiplied by the correction factor to determine delivery in SCFM.
The flow in SCFM should be used for determining the pressure the
drill will hold referring to Figure 1.
11.77 (608.7) 10.91 (564.2) 10.10 (522.3)
0.86 0.79 0.74
0.84 0.78 0.72
0.82 0.76 0.70
0.80 0.74 0.69
0.78 0.73 0.67
0.77 0.71 0.66
0.76 0.70 0.65
20°F to 90°F
(-7°C to 32°C)
450 min.
65 min.
105 min.
11 min.
-10°F
(-23°C)
400°F
(204°C)
90
1200
Stringy
2000 lbs
(907 kg)
30 lbs
(14 kg)
Viscosity Viscosity
(Cst @ 40°C) Index (typ)
D2270 D97
2909 3104
90-110 124
198-242 121
380-430 94
1078 95
Above 90°F
(32°C)
750 min.
85 min.
160 min.
16 min.
0°F
(-18°C)
450°F
(232°C)
90
1200
Stringy
2000 lbs
(907 kg)
30 lbs
(14 kg)
Pour Point Flash point
Max °F (°C) Min °F (°C)
D92 D1401
2592 3488
-16 (-26) 460 (237)
0 (17) 457 (236)
10 (-12) 455 (235)
34 (1) 480 (249)
Emulsion
Min t 35 ml.
>60
>60
>60
>60