DTH Hammer series are divided into: DHD SD MISSION QL HD series
The DHD series is divided into:
DHD3.5 (hammer : 3 inches) drill head diameter: 90-105MM
DHD340 (hammer 4 inches) drill head diameter: 105-130MM
DHD350 (5 inch hammer ) drill head diameter: 130-152MM
DHD360 (hammer 6 inches) drill head diameter: 152-178MM
DHD380 (hammer 8 inches) drill head diameter: 203-245MM
DHD1000 (10 inch hammer ) drill head diameter: 245MM or more
MISSION: M40, M50, M60, M80
SD: SD40, SD50, SD60, SD80
QL: QL40, QL50, QL60, QL80
Low wind pressure for down-the-hole drills: The diameter of the button generally does not exceed:18mm, the type of the button: Chisel the diameter of the drill does not exceed 200mm
High wind pressure for down-the-hole drill bits: the diameter of the button is generally: D14-26mm, the shape of the button: spherical, parabolic
Large-caliber DTH:The button diameter is more than 30mm, generally used for piling, the drill bit diameter: more than 300mm
