High Air Pressure 4"DTH Hammers and bits SD4/QL40/DHD340/M40 for
mining and water well
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 |
Photos
QL40 Hammer Specification
| Drilling Diameter(mm) | Hammer Length(mm) | External Diameter(mm) | Weight(kg) |
| φ110-φ135 | 1097(without bit) | 99 | 41(without bit) |
| Working Pressure(Mpa) | Air Consumption(m³/min) |
| 1.2-2.0 | 1.0Mpa: 6m³/min | 1.8Mpa: 10m³/min | 2.4Mpa: 15m³/min |
| Impact rate at 17 bar | Connection Rod Thread | Recommended Rotation Speed | Bit Shank |
| 27HZ | API 2-3/8'' Reg | 25-40 r/min. | QL40 |
DHD340 Hammer Specification
| Drilling Diameter(mm) | Hammer Length(mm) | External Diameter(mm) | Weight(kg) |
| φ108-φ130 | 881(without bit) | φ99 | 38 |
| Working Pressure(bar) | Air Consumption(m³/min) |
| 8.0-30.0 | 10bar: 5 | 18bar: 10.2 | 24bar: 15 |
| Connection Rod Thread | Bit Shank |
| API 2-3/8” Reg | DHD340A( With Foot Valve) |
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| | All can be designed according to your requests! |
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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.
Related products
DHD340 CIR 150 QL50 Drill pipe
KSQ Related Rock Drilling Tools
MIROC® Rock Drilling Tools include:
Company Information
KSQ Technologies (Beijing) Co. Ltd. has significant experience and
know-how in the supply of materials, components, finished goods,
specially designed/engineered equipment, and services from China.
The company caters to medium to large scale clients who are doing
projects and capital expansion, as well as to firms who require
support with consumable products, maintenance, and repair
operations.
