Top Hammer Drilling Tools Drifting and tunneling R25
Drifting and tunneling R25 drill rods are used in underground mining and construction projects. They are made of high-strength steel and have a hollow core and a threaded connection system on both ends.
Drilling Technique:
R25 drill rods are used with a variety of drilling techniques, including hand-held rock drills, pneumatic rock drills, and electric rock drills. They are suitable for use in drilling both soft and hard rock formations.
Size and Length:
The standard diameter of an R25 drill rod is 25mm (about 1 inch). The length of the rods can vary depending on the specific drilling application, but they are typically available in lengths ranging from 1 to 6 meters (3 to 20 feet). Extension rods can also be used to extend the reach of the drill bit and can be threaded together with other R25 drill rods to create a longer drill string.
Thread Type and Coupling:
R25 drill rods have a specific thread type and coupling system that is used in conjunction with other components of the drilling system. They are threaded on both ends and use an R25 thread connection. The coupling is designed to provide a secure and tight fit to prevent leakage and ensure efficient drilling.
Applications:
R25 drill rods are commonly used in vertical and inclined boreholes in underground mining and tunneling applications. They are often used in narrow tunnels for drilling blast holes and in wells for geotechnical investigations. R25 drill rods are also frequently used in infrastructure projects such as highway construction, tunneling, and dam construction.
Advantages:
R25 drill rods are highly durable and wear-resistant, making them ideal for use in challenging underground conditions. They have high tensile strength, which means they can withstand significant pressure from the drill rig. The threaded connection system allows for easy assembly and disassembly of the drill string, which saves time and increases efficiency on the job site. Additionally, R25 drill rods have a longer lifespan compared to other types of drill rods, which can help reduce costs over time.
R25 Drifting & Tunneling Tools
R25 (1″) bit thread, Button bit diameter: 33mm, 35mm, 37mm, 38mm, 41mm, 43mm
Cross bit diameter: 33mm, 35mm, 38mm
Reaming bit, 6° taper, bit diameter: 64mm, 76mm, 89mm
Pilot adapter, 6° taper, R25 thread, diameter: 26mm
Drifter rod, R32-Hex25-R25, length: 2200mm, 2400mm, 2600mm, 2800mm, 3090mm, 3700mm
Coupling sleeve, R25, 150mm length
