High Pressure Down The Hole Drill DTH Hammers With Ql50 Bit Shank
High Pressure Down The Hole Drill DTH Hammers With Ql50 Bit Shank
In DTH hammers, the rock drilling bit is a continuation of the shank, which the rock drill piston strikes directly. Since the piston is in direct contact with the drill bit, little energy is lost. This gives DTH hammers a nearly constant penetration rate regardless of hole length.
Basic Information
| Items | Replacement Parts |
| 1 | Top sub |
| 2 | O-ring of top sub |
| 3 | Breakout Ring |
| 4 | Check Valve |
| 5 | Spring |
| 6 | Compression Buffer |
| 7 | Air Distributor |
| 8 | Internal cylinder |
| 9 | Piston |
| 10 | External cylinder |
| 11 | Guide sleeve |
| 12 | O-ring of stop ring |
| 13 | Stop ring |
| 14 | Breakout ring |
| 15 | Drive chunk |
| 16 | Drill bit |
| Drilling Diameter(mm) | Hammer Length(mm) | External Diameter(mm) | Weight(kg) | ||||
| φ135-φ155 | 1156(without bit) | 125 | 73(without bit) | ||||
| Working Pressure(Mpa) | Air Consumption(m³/min) | ||||||
| 1.3-2.3 | 1.0Mpa: 9m³/min | 1.8Mpa: 15m³/min | 2.4Mpa: 23m³/min | ||||
| Impact rate at 17 bar | Connection Rod Thread | Recommended Rotation Speed | Bit Shank | ||||
| 25HZ |
API 3 1/2'' Reg API 2 7/8'' Reg |
25-40r/min. |
QL50 (with foot valve) |
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Applications
• Underground mining
• Down the hole rock drilling
Competitive Advantage
• Valveless air distribution, more reliable.
• Simple design of the piston. Long life span.
• More efficient energy transfer, faster drilling speed, low air consumption and lower oil consumption.
• Fewer internal parts, simple structure, less failure and easier to maintain.
• Easy to disassembled because the top sub, the drive chuck and the external cylinder are connected by multiple steps thread.
Photos
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