Halco Rock Tools, UK Manufacturer of DTH Hammers and Bits. Halco pioneered the development and distribution of DTH hammers in the 1950s.
DTH hammers and bits are the most versatile tools available to a driller. Drill rigs working with DTH hammers and bits hold a number of advantages over those running with other drilling methods.
 
  
DTH systems offer drillers the flexibility to operate successfully across a broad range of ground conditions from soft, through medium and very hard. 
GP 400
GP 500
GP 600
Size
Hammer Type
Part Number
Shank
4"
5"
6"
GP400
GP500
GP600
600425
600426
600427
DHD340
DHD350
QL60
Size
Hammer Type
Drilling Diameters
Air Pressure
4"
5"
6"
GP400
GP500
GP600
110mm - 140mm
140mm - 165mm
156mm - 241mm
100 - 435psi (7-30 bar)
100 - 435psi (7-30 bar)
100 - 435psi (7-30 bar)