Products Description

Reverse circulation hammers work with pneumatic rotary drilling equipment to collect underground rock and mineral samples rapidly and cost-effectively. These hammers enable high-speed drilling operations while keeping the per-meter drilling cost low, making this drilling approach highly suitable for acquiring mineral samples during the initial stages of exploration projects.

In RC hammers, all rock cuttings are transported to the ground surface through the central channel of the hammer and drill string. This unique design ensures that the samples obtained via this method remain free from contamination. Moreover, the hammer is engineered to accommodate the injection of water, foam, oil, and polymers without compromising its operational performance.

Parameters

1) 3" RC bits diameter 84mm-100mm shank RE531
2) 4'' RC Bits:Diameter 104mm-127mm; Shank type: RE004/RE004R;
RE542
3) 5'' RC Bits:Diameter 113mm-146mm; Shank type: RE543,RE545,RE547;PR40,PR52,PR54; MX5456
4) 6'' RC Bits: Diameter 152-190mm; Shank type: RC62/RC62R;
5) 8'' RC Bits: Diameter190-250mm; Shank type: RC82/RC82R;
6) 10'' RC Bits: Diameter 250-370mm; Shank type: RC100/RC100R.

RE542 hammer technical date:

Length (less bit)	1191mm
Weight (less bit)	51.0kg
External diamater	φ109.5mm
Bit shank	RE542
Hole range	φ113-φ130
Connection thread	3.5"-4" Remet 4" Metzke
Working pressure	1.5Mpa-3.5Mpa
Air consumption	1.7 Mpa	12 m³/min
	2.4 Mpa	18 m³/min
	3.0 Mpa	26 m³/min

PR52 hammer technical date:

Length (less bit)	1227mm
Weight (less bit)	68.5kg
External diamater	φ121mm
Bit shank	PR52
Hole range	φ126-φ142
Connection thread	4"-4.5" Remet 4"-4.5" Metzke
Working pressure	1.5Mpa-3.5Mpa
Air consumption	1.7 Mpa	16 m³/min
	2.4 Mpa	22 m³/min
	3.0 Mpa	28 m³/min

Advantages

Reverse Circulation (RC) DTH hammers are indispensable tools for mineral exploration and grade control, offering performance benefits that exceed those of standard DTH hammers. Our specialized hammers are manufactured with an integrated inner tube, which ensures efficient collection of rock samples while preventing contamination. This innovative design is what makes RC drilling superior to traditional methods for geological analysis purposes.

The RC hammers we supply deliver powerful impact action while maintaining a smooth flow of untainted samples. This dual focus on fast penetration and accurate sample recovery safeguards the integrity of exploration data-information that is critical for making well-informed project decisions. Our designs minimize friction and wear, directly translating to longer operational service life and reduced maintenance costs for your equipment fleet.

Uncompromised Sample Purity: The RC drilling method allows rock cuttings to move upward through the inner tube of the drill string, isolating them from the borehole walls. We ensure that this protected transport pathway minimizes contamination from surrounding rock layers, providing geologists with the most accurate representation of the target formation for reliable analysis.
Exceptional Penetration Speed: Our RC DTH hammers are engineered to maintain a powerful, high-frequency impact rate-even when handling the reverse airflow required for sample collection. This strong impact force maximizes the rate of advance in hard and dense rock formations, significantly speeding up the exploration process.
Superior Borehole Stability: The continuous, high-volume air flushing feature inherent in the RC system keeps the borehole extremely clean during drilling operations. This consistent removal of cuttings reduces friction and wear on both the hammer and drill bit, helping to maintain a stable, well-formed borehole throughout the entire drilling depth.
Minimized Water Interference: In areas with high water inflow, the positive pressure and effective sealing mechanism of the RC system manage water intrusion more effectively than standard drilling methods. We equip our hammers with this capability to ensure uninterrupted drilling and accurate sample collection, preventing borehole washout and preserving data reliability even in challenging wet conditions.

Applications

We recommend the use of RC DTH hammers in any scenario where precise sample collection must be combined with efficient deep drilling. These hammers perform reliably in harsh operating environments, providing the necessary operational stability for continuous use in large-scale exploration projects. This reliability ensures that demanding project timelines are met successfully.

Mineral Exploration and Prospecting: RC DTH hammers are the industry benchmark for early-stage mineral exploration, where speed and deep penetration are essential requirements. We use this method to obtain precise, continuous rock samples across extensive areas-critical for accurately mapping ore bodies and calculating initial resource estimates before full-scale mining commences.
Mine Grade Control: In active mining operations, RC drilling is employed for near-blast hole sampling and grade control purposes. This rapid sampling process allows for quick identification of ore and waste material boundaries. This key information is used to manage material flow, optimize the blending process, and prevent dilution of valuable ore resources.
Geotechnical and Environmental Surveys: For major construction projects, dams, and environmental site assessments, RC DTH drilling is used to collect reliable subsurface data. This method provides detailed deep profiles of soil and rock types, enabling confident assessment of ground stability and potential contamination pathways.
Water Well and Geothermal Drilling: While primarily used for mineral-related work, the RC system also offers significant value in water well and geothermal exploration. We supply tools that enable efficient drilling of deep boreholes while providing samples that verify aquifer characteristics and thermal gradients-information that guides the final well completion strategy.