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Dth Reverse Circulation Hammer For Exploration Drilling 127-178mm
Bit Dia of DTH Hammers and bits
Product features of DTH Hammers and bits
RCseries reverse circulation DTH Hammer is the latest developed
product of our company. It is mainly used for deep exploration
drilling and ore grade control.
It has the following characteristics:
1.Based on previous experience of ordinary hammers, combined with
the features of reverse circulation hammer, optimized internal
structure and ideal energy transfer, thus ensuring the series of
hammers drilling with fast, smooth and continuous sampling.
2. The internal structure is very simple with components of high
rigidity, thus ensuring long life and easy maintenance of the
hammer.
3.The collection tube adopts an integrative design and can be
replaced without disassembling the hammer. With carburizing
treatment, it has good abrasive resistance.
4.Equipped with bits designed with patent. Simply by replacing the
drill bit, the same hammer can drill holes of different sizes
ensuring that the sample is not contaminated.
5. In difficult conditions such as loose soil, hard rock and plenty of water exists, sampling can be done well.
Technical specification of DTH Hammers and bits
Technical Data for RC Hammer:
DTH hammer type | HRC45 | DTH hammer type | HRC55 | HRC65 | HRC52 | ||
Length(with bit) | 1020 | Length(with bit) | 1111 | 1250 | 1208 | ||
Weight(less bit) | 94 | Weight(less bit) | 66.5 | 110 | 70 | ||
External diameter | Φ99 | External diameter | Φ126 | Φ146 | Φ126 | ||
Bit shank | HRC45 | Bit shank | HRC55 | HRC65 | HRC65 | ||
Hole range(mm) | Φ114-127 | Hole range(mm) | Φ133-152 | Φ155-190 | Φ133-146 | ||
Connection thread | upon drill the tube | ||||||
Working pressure | 1.0-3.0Mpa | Working pressure | 1.3-3.5Mpa | 1.3-3.5Mpa | 1.5-3.5Mpa | ||
Impact rate at 1.7Mpa | 30Hz | Impact rate at 2.4Mpa | 35Hz | 28Hz | 35Hz | ||
Recommended Rotation speed | 25-40r/min | Recommended Rotation speed | 25-40r/min | 25-40r/min | 25-40r/min | ||
Air consumption | 1.0Mpa | 8.0m3/min | Air consumption | 1.7Mpa | 16.0m3/min | 20.0m3/min | 16.0m3/min |
1.8Mpa | 12.0m3/min | 2.4Mpa | 22.0m3/min | 26.0m3/min | 22.0m3/min | ||
2.4Mpa | 16.0m3/min | 3.0Mpa | 28.0m3/min | 35.0m3/min | 28.0m3/min |
Reverse circulation drill bits:
Drill Bit | Bit Dia. (mm) | NO.Air | Gauge | Front | Weight | Part No. |
Holes | Buttons | Buttons | (Kg) | |||
HRC | 115 | 2 | 8×φ14 | 8×φ13 | 14 | HRC45-115 |
140 | 2 | 8×φ16 | 8×φ14 | 16.5 | HRC55-140 | |
165 | 2 | 8×φ18 | 8×φ16 | 19.5 | HRC65-165 | |
Mic | 133 | 2 | 8×φ16 | 8×φ14 | 17.5 | Mic-133 |
140 | 2 | 8×φ16 | 8×φ14 | 18 | Mic-140 | |
146 | 2 | 8×φ18 | 8×φ14 | 20 | Mic-146 | |
PR5 | 133 | 2 | 8×φ16 | 8×φ14 | 12.5 | PR5-133 |
140 | 2 | 8×φ16 | 8×φ14 | 13 | PR5-140 | |
146 | 2 | 8×φ18 | 8×φ14 | 13.5 | PR5-146 | |
PR4 | 115 | 2 | 8×φ16 | 8×φ13 | 14.4 | PR4-115 |
127 | 2 | 8×φ16 | 8×φ14 | 15 | PR4-127 | |
133 | 2 | 8×φ16 | 8×φ14 | 15.5 | PR4-133 |