Halco Rock Tools, UK Manufacturer of DTH Hammers and Bits. Halco pioneered the development and distribution of DTH hammers in the 1950s.
Super Dominator 550HD is a class leader in performance and is suitable for drilling at a wide range of air pressures but excels at high working pressures.
 
Combining the raw power of the Super Dominator 500 with extended life for abrasive conditions, the Super Dominator 550HD has a larger outside diameter, a one piece top adaptor with N.R.V (Non-Return-Valve) fitted for easy inspection and an integral finger to reduce maintenance and eliminating shimming.
 
The Super Dominator 500HD has no liner which increases the piston blow energy and reduces parts required.
One piece top adaptor reduces internal parts.  No make up required.  External N.R.V for easy maintenance.
Heavy duty cylinder to extend hammer life.
Revised chamber volumes and cycle timing to optimize performance.
Simplified piston geometry for improved balance and location within the cylinder.
DHD350R and QL50 shanks reduce contact stresses and wear rates.
Air Consumption
 
Suitable for operation at air pressures of 100 - 507 PSI (7-35 bar).
 
Drilling diameters of 130 - 165mm (5 - 6 1/2").
DHD350R
Tech Specs
QL50
Tech Specs
Overview
Super Dominator 550 HD
Hammer Type
Part Number
Shank
Top Thread
Hammer Flat Size
Weight
Outside Diameter
Make Up Length
Recommended Maximum Thrust
600294
QL50
3 1/2" API Reg Pin
90mm (3.544") 
67Kg
124.5mm (4.85")
955mm (37.60")
900Kg (1980 lbs)
600293
DHD 350R
3 1/2" API Reg Pin
90mm (3.544") 
67Kg
124.5mm (4.85")
975mm (38.40")
900Kg (1980 lbs)
Drill Bit Overview
DHD350R
Diameter
Face
Buttons
Oversize
 
 
 
 
 
Y
Y
Y
Part
Number
650677
653205
653070
653272
650772
650676
653711
653092
Weight
(Kg)
16.4
16.2
15.9
16.16
16.45
17.8
17.8
21.4
Design
Concave
Flat
Convex
Flat
Concave
Concave
Convex
Concave
Type
Dome / S-Ballistic
Dome
Semi-Ballistic
Dome / S-Ballistic
Dome
Dome / S-Ballistic
Convex
Concave
Qty & Dia
8 x 16mm / 7 x 16mm
7 x 16mm / 8 x 16mm Long
8 x 16mm / 8 x 16mm Long
8 x 16mm / 8 x 16mm
15 x 16mm
9 x 16mm / 10 x 16mm
20 x 16mm
10 x 16mm / 8 x 20mm
mm
140
140
140
140
140
150
152
165
Inch
5 1/2
5 1/2
5 1/2
5 1/2
5 1/2
5 7/8
6
6 1/2
QL50
Diameter
Weight
(Kg)
13.53
15.92
14.3
16.32
16.6
Buttons
Face
Oversize
 
 
 
 
Y
Part
Number
653238
653149
653423
653235
653032
 
Qty & Dia
18 x 14mm
15 x 16mm
18 x 14mm
8 x 16mm / 8 x 16mm Long 
8 x 16mm / 8 x 16mm Long
 
mm
130
140
140
140
150
 
Inch
5 1/8
5 1/2
5 1/2
5 1/2
5 7/8
 
Type
Ballistic
Dome
Ballistic
Dome
Dome
 
Design
Convex
Concave
Convex
Flat
Flat
 
Additional bit configurations are available on request.