PRO DRILLER GUIDE
DATA FOR WORKING
WITH THE BULROC
HYPER 181
Useful data for working with the Bulroc Hyper 181 Hammer
WEIGHT
(less Bit)
3545 lbs
1608 Kg
LENGTH
(less Bit)
86”
2185 mm
PRESSURE
(in PSI)
Hammer Specifications
OUTSIDE
BORE
DIAMETER
DIAMETER
16”
12.25”
406 mm
311 mm
AIR
CONSUMPTION
Liters / second
513.44
717.55
943.24
1188.62
1452.22
1732.85
100
125
150
175
200
225
PRESSURE
(in PSI)
100
125
150
175
200
225
Air Consumption
AIR
CONSUMPTION
Liters / minute
30806.24
43053.03
56594.68
71317.45
87133.21
103971.07
PISTON
WEIGHT
733 lbs
333 Kg
AIR
CONSUMPTION
Cubic Meter / min
30.81
43.05
56.59
71.32
87.13
103.97
Hammer Frequency and Energy Output
BLOWS PER MINUTE
(BPM)
536
600
657
709
758
804
PRESSURE
(in PSI)
100
125
150
175
200
225
MANUFACTURER
Bulroc
BP
Chevron
Shell
Esso/Exxon
Required Lubrication
LUBRICATION RATE
PINTS / HOUR
3.3
5.0
6.7
8.3
10.3
12.3
Recommended Lubricants
TYPE 30
T220
ENERGOL RD-E 100
ARIES 100
TORCULA 100
AROX EP100
PISTON
STROKE
5.75”
146 mm
AIR
CONSUMPTION
Cubic Feet / Minute
1087.88
1520.35
1998.55
2518.47
3076.98
3671.58
ENERGY OUTPUT
kW
44.65
62.40
82.02
103.36
126.28
150.68
LUBRICATION RATE
LITRES / HOUR
1.9
2.8
3.8
4.7
5.9
7
TYPE 50
T320
ENERGOL RD-E 300
ARIES 320
TORCULA 320
AROX EP320
Required Rotation Speeds (RPM)
(These should be viewed as a guide and adjusted to suit rock type and ground conditions)
PRESSURE
IN PSI
100
125
150
175
200
225
458mm
Button Bit
6
6
7
8
8
9
508mm
Button Bit
5
6
6
7
7
8
559mm
Button Bit
5
5
6
6
7
7
610mm
Button Bit
4
4
5
6
6
6
660mm
Button Bit
4
4
5
5
6
6
Required Weight on Bit and Resultant Torque Range
(These should be viewed as a guide and adjusted to suit rock type and ground conditions)
BUTTON BIT
REQUIRED WEIGHT
REQUIRED WEIGHT
REQUIRED TORQUE
HEAD DIAMETER
lbs
Kg
(including stall factor)
Ton Mtr
458mm
9016
4093
1.4 to 1.9
508mm
10000
4540
1.7 to 2.3
559mm
11004
4996
2.1 to 2.8
610mm
12008
5452
2.5 to 3.3
660mm
12992
5898
2.9 to 3.9
Water and Foam Injection
MAXIMUM RATE
RECOMMENDED RATE
15 liters / minute
32 Liters / minute
ADDITIONAL REQUIRED
LUBRICATION
Up to 50%
Accepted Button Bit Conversions and Blow Tube Tolerances
(Refer to the manual for details of required components to change bit type)
BIT TYPE
BLOW TUBE DIAMETER
BLOW TUBE PROTRUSION
HYPER 181
3” / 76.2mm
3.65” / 92.7mm
SD 18
2.75” / 69.85mm
3.61” / 91.7mm
NUMA 180
3” / 76.2mm
3.65” / 92.7mm
Formulas for “UP HOLE VELOCITY” and ROD or SHROUD diameter
(Recommended MINIMUM VELOCITY is 3000ft/min or 915m/min)
METRIC UP HOLE VELOCITY
IMERIAL UP HOLE VELOCITY
ROD or SHROUD DIAMETER
VM = X(M³) x 1273406.57
VF = Y(CMF) x 183.40
DM² - dm²
VM = Velocity in meters per minute
X(M³) = Cubic meters of air passed
by the hammer in one
minute
DM² = Dia of Hole Squared, in
square mm
dm² = Dia of drill rod or shroud
squared in square mm
WARNING
DL² - di²
VF = Velocity in feet per minute
Y(CFM) = Cubic feet of air passed
by hammer in one minute
DL² = Dia of Hole Squared in square
inches
di² = Dia of drill rod or shroud
Squared in square inches
di = √ DL² ­ Y(CFM) x 183.40
3000
This formula gives the required rod
or shroud diameter (in inches) to
achieve the recommended
3000ft/min minimum up hole
velocity
ALWAYS THINK
SAFETY FIRST!
This guide is published by and copyright © of Bulroc (UK) Ltd. All Rights Reserved. Always operate your Bulroc drilling equipment according to the
instructions contained within the operating manual. Further copies of this guide and your Hyper Hammer Operating Manual can be downloaded from
the Bulroc website; www.bulroc.com. E & O.E
For urgent support or sales enquiries, call Bulroc on +44 (0)1246 544700 or Skype BULROCUKSALES .