Halco Rock Tools, UK Manufacturer of DTH Hammers and Bits. Halco pioneered the development and distribution of DTH hammers in the 1950s.
The Superior 850 has been designed for high performance drilling in hard to medium rock conditions.

Research shows that Air Drilling can help achieve lower drilling costs, faster drill rig installation, an increased rate of penetration (ROP) with a ROP up to 5 times faster than mud, reduced hole deviation and effective pressure control through lost circulation zones.
 
Design features include a jetted backhead, variable air bleed, a bit catcher system to ensure your bits are lost down the hole and diamond enhanced inserts.
Variable bypass porting has been added to the top adaptor.
A variable live air bleed to allow  greater volumes of drilling additives to increase up-hole velocity.
Air Consumption
The bit catcher system ensures bits are not lost down the hole.
Size
222-270mm
(8 3/4-10 5/8")
Shank
QL80
Air Pressure
100-507 PSI
(7-35bar)
Tech Specs
Overview
Hammer Type
Part Number
Shank
Top Thread
Hammer Flat Size
Weight
Outside Diameter
Make Up Length
Recommended Maximum Thrust
Superior 850
600433
QL80
4 1/2" API Reg Pin
125mm (4.921") 
210Kg
192mm (7.559")
1281mm (50.433")
2000Kg (4400 lbs)
Drill Bit Overview
QL80
Part
Number
653517
653516
653527
653522
653519
653529
Diameter
Face
Buttons
Weight
(Kg)
70
70
72
72
80
80
mm
222
222
225
225
250
250
 
 
Inch
8 3/4
8 3/4
8 7/8
8 7/8
9 7/8
9 7/8
Qty & Dia
15 x 22.2mm / 18 x 18mm / 6 x 18mm Wear
27 x 18mm / 6 x 18mm Wear
15 x 22.2mm / 18 x 18mm / 6 x 18mm Wear
27 x 18mm / 6 x 18mm Wear 
15 x 22.2mm / 20 x 18mm / 6 x 18mm
15 x 22.2mm / 20 x 18mm / 6 x 18mm Wear
 
Design
Concave
Concave
Concave
Concave
Concave
Concave
Type
Dome Full Diamond
Dome Full Diamond
Dome Full Diamond
Dome Full Diamond
Dome Full Diamond
Dome Diamond Gauge
Additional bit configurations are available on request.