Rock drilling thread extension steel bars encompass various types such as extension rods, MF rods, light extension drill rods, drifter rods, and shank adapter drill rods. These can also be termed threaded drill rods or threaded pipes, featuring either single-ended or double-ended threading, and coming in hollow round or hollow hexagonal shapes. They constitute a vital component of threaded connection drilling tools and equipment. Connected to top hammer rock drill rigs via shank adapters and couplings, and to drill bits via threads on the other end, these threaded rods can be linked with other drill rods to form a complete set of threaded connection drilling tools. They can be paired with a single shank adapter and drill bit, or multiple adapters and bits, and are suitable for shallow holes and small-diameter rock drilling. With a wide range of applications, high drilling speeds, minimal impact energy transmission loss, and enhanced drilling efficiency, they facilitate drilling mechanization and improve drilling conditions. Consequently, thread extension drill rods occupy a significant proportion in the overall drilling industry.
Rock drilling thread extension steel bars must possess high fatigue strength, elasticity, rigidity, and toughness, although strength and toughness are often in conflict. The threads at both ends of the rods are crucial for forming a complete set of drilling tools. Material properties can only be fully utilized after heat treatment, making material selection and heat treatment processes equally important.
M/F extension rods, a type of round or hexagonal threaded drill rod with one end as an internal thread and the other as an external thread, are often referred to as MF drill rods internationally. They facilitate quick rod connections with coupling sleeves, reducing the weight and length of the complete drilling tools, shortening threaded connections, and minimizing thread joint impact energy loss. This enhances ease of loading and unloading, and significantly increases drilling speed and efficiency.
Specifications include:
In mining operations, GT60 MF drill rods are widely used for tunnel excavation, ore mining, and other tasks. Similarly, in geological exploration, geotechnical engineering, and other fields, GT60 MF drill pipes are commonly employed for rock drilling operations.
T51 Drilling Tools MF Rod: A Comprehensive Guide
The T51 Drilling Tools MF Rod stands as a testament to high-performance drilling technology. Here, we delve into a detailed analysis of this remarkable tool:
1. Product Overview
Introducing the T51 rapid drilling MF rod, a precision-engineered, high-performance tool tailored for drilling operations across diverse conditions. It harmonizes advanced materials with cutting-edge manufacturing processes, ensuring robust performance and longevity in the face of challenging drilling environments.
2. Product Features
3. Application Domains
The versatility of the T51 Drilling Tools MF Rod spans numerous industries:
4. Purchase Recommendations
When acquiring the T51 Drilling Tools MF Rod, consider the following:
Additional Components
The T51 Drilling Tools family extends beyond the MF Rod, encompassing:
In summary, the T51 Drilling Tools MF Rod exemplifies high-performance drilling, characterized by its strength, wear resistance, precision, and versatility. Its widespread application across industries underscores its reliability. When purchasing, ensure you align your needs with reputable brands, quality certifications, and expert advice.
SHANDIKE presents a comprehensive range of tapered rods and bits tailored to meet all your hand-held pneumatic drilling requirements. For mining, quarrying, and tunneling applications, we offer robust tools capable of enduring the harshest rock drilling conditions.
Our extensive product line enables you to select the precise configuration that suits your drilling operations. Our tapered bits and rods come in diverse taper angles, and we provide rods with a variety of shank configurations and steel hex diameters. Additionally, our tapered bits feature both cross and button designs.
SHANDIKE’s tapered rods are available with either high-frequency or full carburization heat treatments to ensure durability.
| 22mm（7/8″）Tapered drill rods | L | Taper Degree | Weight (kg) | |
| mm | foot/inch | |||
| H22×108 Shank | 500 | 1′5/8″ | 7o | 1.5 |
| 800 | 2′7 1/2″ | 2.4 | ||
| 1000 | 3′3 3/8″ | 3 | ||
| 1200 | 3′11 1/4″ | 3.6 | ||
| 1500 | 4′11″ | 4.5 | ||
| 1800 | 5′10 7/8″ | 5.5 | ||
| 2000 | 6′6 3/4″ | 6.1 | ||
| 2200 | 7′2 5/8″ | 6.7 | ||
| 2500 | 8′2 3/8″ | 7.6 | ||
| 3000 | 9′10 1/8″ | 9.1 | ||
| 3500 | 11′5 3/4″ | 10.6 | ||
| 4000 | 13′1 1/2″ | 12.1 | ||
| 4500 | 14′9 1/8″ | 13.6 | ||
| 5000 | 16′4 5/8″ | 15.1 | ||
| 6000 | 19′8 1/4″ | 18.2 | ||
| 7000 | 22′11 5/8″ | 21.2 | ||
| 8000 | 26′3″ | 24.2 | ||
| H22×108 Shank | 800 | 2′7 1/2″ | 12o | 2.4 |
| 1200 | 3′11 1/4″ | 3.6 | ||
| 1600 | 5′3″ | 4.9 | ||
| 2200 | 7′2 5/8″ | 6.7 | ||
| 2400 | 7′10 1/2″ | 7.3 | ||
| 3200 | 10′6″ | 9.7 | ||
| H22×108 Shank | 1800 | 5′10 7/8″ | 7o | 5.5 |
| 2000 | 6′6 3/4″ | 6.1 | ||
| 2500 | 8′2 3/8″ | 7.6 | ||
| 3000 | 9′10 1/8″ | 9.1 | ||
| 3500 | 11′5 3/4″ | 10.6 | ||
| 4000 | 13′1 1/2″ | 12.1 | ||
| 5000 | 16′4 5/8″ | 15.1 | ||
| 22mm（7/8″）Tapered drill rods | L | Taper Degree | Weight (kg) | |
| mm | foot/inch | |||
| H22×108 Shank | 500 | 1′5/8″ | 7o | 1.5 |
| 800 | 2′7 1/2″ | 2.4 | ||
| 1000 | 3′3 3/8″ | 3 | ||
| 1200 | 3′11 1/4″ | 3.6 | ||
| 1500 | 4′11″ | 4.5 | ||
| 1800 | 5′10 7/8″ | 5.5 | ||
| 2000 | 6′6 3/4″ | 6.1 | ||
| 2200 | 7′2 5/8″ | 6.7 | ||
| 2500 | 8′2 3/8″ | 7.6 | ||
| 3000 | 9′10 1/8″ | 9.1 | ||
| 3500 | 11′5 3/4″ | 10.6 | ||
| 4000 | 13′1 1/2″ | 12.1 | ||
| 4500 | 14′9 1/8″ | 13.6 | ||
| 5000 | 16′4 5/8″ | 15.1 | ||
| 6000 | 19′8 1/4″ | 18.2 | ||
| 7000 | 22′11 5/8″ | 21.2 | ||
| 8000 | 26′3″ | 24.2 | ||
| H22×108 Shank | 800 | 2′7 1/2″ | 12o | 2.4 |
| 1200 | 3′11 1/4″ | 3.6 | ||
| 1600 | 5′3″ | 4.9 | ||
| 2200 | 7′2 5/8″ | 6.7 | ||
| 2400 | 7′10 1/2″ | 7.3 | ||
| 3200 | 10′6″ | 9.7 | ||
| H22×108 Shank | 1800 | 5′10 7/8″ | 7o | 5.5 |
| 2000 | 6′6 3/4″ | 6.1 | ||
| 2500 | 8′2 3/8″ | 7.6 | ||
| 3000 | 9′10 1/8″ | 9.1 | ||
| 3500 | 11′5 3/4″ | 10.6 | ||
| 4000 | 13′1 1/2″ | 12.1 | ||
| 5000 | 16′4 5/8″ | 15.1 | ||
Intraset
used for shaft sinking, tunnel driving and mining where small holes are desired.
Tapered Equipment
used in shaft sinking, tunnel driving and mining where small holes are desired. The objective in using tapered drill
steel and bits is to achieve the full utilization of the drill steel. With integral drill steel if the chisel wears or breaks the entire unit is discarded,whereas the tapered drill bits can be replaced or the steel reshanked or even retapered.
Rope Thread
used for underground mining in production drilling, longhole drilling, and roof bolting applications
Choosing the right carbide:
The larger the volume of carbide, the more aggressive the bit. The more aggressive carbides assist movement of the chips away from the face as there is more room for airflow on the face of the bit.These more aggressive bits help to break out larger chips, which increases the penetration rate.There is also a greater volume of carbide to wear away which can lead to longer bit life.
The application of down the hole drilling tools in South Africa is mainly reflected in two aspects: mining and infrastructure construction.
1、 Mining exploitation
Improve mining efficiency:
South Africa is an important mineral resource country on the African continent, with abundant gold, diamond, and coal mines. Down the hole drilling tools have become important tools in South African mining due to their efficient and precise drilling capabilities.
Down the hole drilling tools can quickly drill blasting holes of the required diameter and depth, providing strong support for subsequent blasting operations and significantly improving the efficiency of mineral resource extraction.
Adapt to complex geological conditions:
The geological conditions in South Africa are complex and diverse, and down the hole drilling tools have strong drilling capabilities and adaptability, enabling drilling operations in formations of different hardness and rock types.
For example, in some gold mining operations in South Africa, down the hole drilling tools can successfully handle hard rock types such as granite and basalt, ensuring smooth drilling operations.
Reduce mining costs:
The automation level of down the hole drilling tools is relatively high, which can reduce labor costs and safety risks.
Meanwhile, due to its efficient drilling capability, it can shorten the mining cycle and thus reduce mining costs.
2、 Infrastructure construction
Tunnel construction:
Tunnel construction is an important part of infrastructure development in South Africa. Down the hole drilling tools play an important role in tunnel construction, enabling efficient drilling operations and providing strong support for tunnel excavation and support.
Foundation treatment:
In the treatment of building foundations, down the hole drilling tools can drill grouting holes or anchor holes with the required aperture and depth, providing strong support for the reinforcement and stability of the foundation.
Other applications:
Down the hole drilling tools can also be used for drilling drainage holes and ventilation holes, providing comprehensive support for infrastructure construction in South Africa.
3、 Classification and characteristics of down the hole drilling tools
Downhole drilling tools can be classified into three types based on tonnage and perforation diameter: light, medium, and heavy. Lightweight down the hole drill has a self weight of less than 10 tons, a perforation diameter of about 100 millimeters, and is mostly used in small and medium-sized open-pit mines; Medium sized down the hole drill has a self weight of 10-15 tons and a perforation diameter of about 150 millimeters, suitable for perforation in medium hard or hard rocks; The heavy-duty down the hole drill weighs about 30 tons and has a perforation diameter of about 200 millimeters. It is used for perforation of hard or extremely hard rocks and is suitable for large open-pit mines.
The main characteristics of down the hole drilling tools are high efficiency, low noise, and environmental friendliness. It uses compressed air to drive the drill bit for drilling operations, which has the advantages of fast drilling speed and good drilling quality. At the same time, the down the hole drilling tool can flexibly switch between different driving modes (such as hydraulic, internal combustion, electric, etc.) according to working conditions and requirements to achieve the best working effect.
| Hammer | BR2A | DHD3.5 | HK4D | HD45 | HQL4A | HQL50 | HK5Q | HD55 | HQL60 | HQL6A | HQL80 | HD85 | HK9Q | HSD10 | HSD12 | HK12Y | N125-R |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Recommended bit size, mm | 76 | 92-105 | 112-127 | 140-152 | 165-178 | 203-229 | 216-229 | 245-305 | 305-445 | 305-350 | 305-445 | ||||||
| Bit Shank | BR2A | DHD3.5 | DHD340A | QL40 | QL50 | DHD350 | QL60 | QL80 | DHD380 | QL80 | SD10 | SD12 | HY12 | NUMA125R | |||
| External diameter, mm | 63 | 82 | 100 | 100 | 101 | 126.5 | 127.5 | 126.5 | 148 | 146 | 185 | 185 | 203 | 225 | 275 | 275 | 275 |
| Length excl. thread, mm (Less bit) | 837 | 855 | 915 | 1032.5 | 1057 | 1147 | 935 | 1167 | 1121 | 1182 | 1471 | 1487 | 1345 | 1413 | 1680 | 1590 | 1812 |
| Hammer weight, kg (Less bit) | 14.1 | 25 | 37.5 | 40.6 | 41 | 71.6 | 67.6 | 77.2 | 105 | 105 | 203 | 206 | 228 | 303 | 526 | 510.2 | 546 |
| Package case size | (L)910 (W)90 (H)120 | (L)1200 (W)110 (H)140 | (L)1010 (W)130 (H)160 | (L)1080 (W)125 (H)134 | (L)1150 (W)130 (H)160 | (L)1290 (W)150 (H)175 | (L)1100 (W)155 (H)180 | (L)1290 (W)150 (H)175 | (L)1270 (W)170 (H)200 | (L)1260 (W)180 (H)200 | (L)1440 (W)230 (H)270 | (L)1560 (W)230 (H)270 | (L)1500 (W)240 (H)280 | (L)1620 (W)275 (H)290 | (L)1880 (W)320 (H)320 | (L)1665 (W)320 (H)360 | (L)1880 (W)310 (H)310 |
| Top Sub thread | RD50 | 2-3/8″ API REG | 3-1/2″ API REG | 4-1/2″ API REG | 6-5/8″ API REG | 6-5/8″ API REG 7-5/8″ API REG | 6-5/8″ API REG | ||||||||||
| Working Pressure, PSI | 80-170 | 150-250 | 200-300 | 250-350 | 300-350 | 300-380 | 300-380 | 150-350 | 200-350 | ||||||||
| Air consumption, CFM | 250-350 | 300-400 | 500-700 | 500-800 | 600-900 | 950-1200 | 950-1200 | 1000-1800 | 1200-1500 | 800-1800 | |||||||
| Piston diameter, mm | 42.7 | 65 | 82 | 80 | 80 | 104 | 102 | 100 | 122 | 121 | 150 | 150 | 165 | 185 | 225 | ||
| Piston weight, kg | 1.7 | 5.1 | 9.2 | 9 | 9 | 17 | 17 | 16 | 24 | 24 | 38 | 42 | 50 | 68 | 110 | 111 | 111 |
| Wrench flat, mm | L47 W50 | L57 W35 | L74.5 W45 | L64 W40 | NO wrench flat | L89 W60 | L88 W50 | L89 W60 | L101 W65 | L101 W60 | L128 W70 | L140 W70 | L128 W70 | L140 W70 | L140 W70 | L140 W70 | L140 L70 |
| Feed force, kN | 2~6 | 3~8 | 5~15 | 6~25 | 7~20 | 10~25 | 15~30 | 20~35 | |||||||||
| Rotation speed, r/min | 30-70 | 3-90 | 25-80 | 20-70 | 25-60 | 20-60 | 15-35 | ||||||||||
| Drilling conditions and project specifications may require larger air package to be used | |||||||||||||||||
Drifting&Tunneling: R25 (1) “may refer to the use of a specific specification (R25) tool or equipment for drifting (horizontal or inclined tunnel excavation) and tunnel excavation operations in mining or tunnel engineering.
Thread button bits made with high quality of best quality alloy steel bar and tungsten carbides, through heat treatment so that it can withstand the toughest rock drilling demands, and transmit intensive impact energy into the rock with the least possible loss of energy.
Button bit
Drill rod
Coupling
Reaming Drilling Tools
Usage:
Reaming drilling tools are utilized after a pilot hole has been drilled to a specified depth, when a larger diameter needs to be reamed out.
Products Manufactured:
Composition:
Pilot reaming drilling tools are comprised of pilot adapters and reaming button bits. Both domed reaming button bits and adapter reaming button bits feature a one-piece design.
Parameters:
Features:
Applications:
Suitable for drilling works involving blasting duties in tunneling, construction, mining, quarrying, and other relevant industries.
Pilot Bits 6°, 12°
Diameter | Length | Thread | Taper Degree | |
mm | inch | mm | ||
| 26 | 1 1/32 | 300 | R25 | 6° |
| 26 | 1 1/32 | 300 | R28 | 6° |
| 26 | 1 1/32 | 300 | R32 | 6° |
| 35 | 1 3/8 | 250 | R25 | 12° |
| 38 | 1 1/2 | 250 | R28 | 12° |
| 40 | 1 9/32 | 250 | R32 | 12° |
Reammer Button Bits 6°, 12°
Diameter | T.C (tungsten carbide) Buttons | Angle | Taper Degree | ||
mm | inch | Gauge x mm | Front x mm | Gauge | |
64 | 2 1/2 | 8 x 10 | 2 x 9 | 35° | 6° |
76 | 3 | 8 x 11 | 2 x 11 | 35° | 6°, 12° |
89 | 3 1/2 | 8 x 11 | 4 x 11 | 35° | 6°, 12° |
102 | 4 | 8 x 13 | 4 x 13 | 35° | 6°，12° |
About Drifter Rod R32 – Hex 28 – R25
1. Product Specifications and Structure
The Drifter Rod R32 – Hex 28 – R25 features a unique specification: R32- Hex 28- R25. Here, R32 and R25 signify the thread specifications on both ends of the drill pipe, respectively. The notation Hex 28 indicates that the middle portion of the drill pipe adopts a hexagonal (Hex) structure, with a key dimension or characteristic related to the number 28, which could pertain to diameter, length, or another dimensional parameter as specified in the product description. Structurally, one end of the drill rod is equipped with an R32 thread, while the other end features an R25 thread, facilitating compatibility with various equipment and tools of differing specifications. The hexagonal mid-section enhances grip and handling, simplifying rotation and advancement during drilling operations.
2. Product Features
3. Application Scenarios
4. Precautions for Use
Drifter rod R32–Hex 25–R25 is a specific specification of drill rod
1、 Product specifications and structure
Specification: R32- Hex 25- R25, where R32 and R25 respectively represent the thread specifications at both ends of the drill rod.
Structure: One end of the drill rod adopts R32 thread, the other end adopts R25 thread, and the middle part is a hexagonal (Hex) structure, which is easy to connect and operate with corresponding tools or equipment.
2、 Product Features
High strength: usually made of high-strength alloy steel, capable of withstanding large torque and tension, ensuring stability and durability during drilling.
High precision: The threaded part is precision machined to ensure a tight and stable connection with the corresponding equipment, avoiding loosening or detachment during the drilling process.
Wide applicability: Suitable for various drilling operation scenarios, such as mining, tunnel excavation, slope stability, etc., it can meet the needs of different strata and operations.
3、 Application scenarios
Mining: In mining, R32 – Hex 25 – R25 drift rods can be used to drill ore cores or perform other mining operations, improving work efficiency.
Tunnel excavation: In tunnel engineering, this drift rod can be used to drill holes in the tunnel wall for anchor support or other operations to ensure the stability of the tunnel structure.
Slope treatment: In slope treatment, R32-Hex 25-R25 drift rods can be used to drill drainage holes or grouting holes to improve the stability of the slope and prevent geological disasters such as landslides.
4、 Precautions for use
Inspection and maintenance: Before use, the drift rod should be inspected to ensure that its surface is free of defects such as cracks and wear, and regular maintenance and upkeep should be carried out to extend its service life.
Correct operation: When using a drift rod for drilling operations, relevant operating procedures and safety regulations should be followed to ensure the correctness and safety of the operation.
Adaptation equipment: Equipment and tools that match the specifications of the drift rod should be selected for connection and operation to ensure the smooth progress of drilling operations.
R25 (1 “) BIT THREE, also known as R25 model (diameter of 1 inch or approximately 25.4 millimeters) threaded drill bit, is mainly used for drilling operations. The following is a detailed introduction to it:
1、 Product Features
High performance standards: R25 threaded drill bits typically comply with high-performance standards such as ISO-9001 quality certification to ensure product reliability and durability.
Customized service: Customized production can be carried out according to customer needs, including drill bit size, material, coating, etc., to meet the needs of different application scenarios.
Wide applicability: Suitable for various drilling operations, such as mining, tunnel excavation, slope stability, etc., as well as for medium hard formations, where rapid penetration is necessary and straightness is not as critical.
2、 Product application
Mining: In mining operations, R25 threaded drill bits can be used to drill ore cores or perform other mining operations.
Tunnel excavation: In tunnel engineering, this drill bit can be used to drill holes in the tunnel wall for anchor support or other operations.
Slope stability: In slope treatment, R25 threaded drill bits can be used to drill drainage holes or grouting holes to improve the stability of the slope.
3、 Product specifications
Diameter: 1 inch (approximately 25.4 millimeters)
Thread type: R25
Packaging and delivery: Delivery is usually done in individual packaging units, and packaging size and weight may vary depending on the manufacturer and customization requirements.
R25 (1 inch) Extended Drilling RODS, here are some key information:
1、 Product Overview
R25 extended drill rod is a drilling tool specifically designed for rock drilling, with a diameter of 1 inch (25 millimeters) and excellent strength and durability. This type of drill rod is commonly used in mining, tunnel excavation, and quarries where deep drilling is required.
2、 Product Features
High strength: The R25 extended drill rod is made of high-quality carbon steel or other high-strength alloy materials, which can withstand the enormous pressure and torque during the drilling process.
Long lifespan: After careful forging and heat treatment processes, the drill rod has excellent wear resistance and fatigue resistance, thereby extending its service life.
Easy to connect: Drill rods are usually connected by threads or snap fasteners, which facilitate quick installation and disassembly and improve work efficiency.
Strong adaptability: R25 extended drill rod can be applied to various drilling equipment, such as rock drills, down the hole drills, etc., to meet different drilling needs.
Extended drilling tools are usually used in drilling areas that require deep drilling or are difficult to reach directly. They increase the length of the drill rod, allowing drilling tools to reach farther or deeper positions. This type of drilling tool has a wide range of applications in fields such as petroleum, natural gas, geological exploration, and mining.
HANDHELD AND SMALL HOLE DRILLING
Button bit
MF-rod, R23 – Hex 22 – R23
The extension drill rod serves as a conduit for transferring power from the rock drill piston to the rock surface. One end of this rod attaches to a coupling or shank adapter, while the opposite end connects to a threaded drill rod.
Specifications:
Key Features:
Usage:
Ideal for drilling tasks in tunneling, construction projects, mining operations, quarrying activities, and other similar applications.
Bench and Production Rods, Extension Rods, MF(Speed) Rods |
| Description | Length | Diameter | Weight | ||
| mm | feet | mm | inch | kg | |
| Extension RodR32 – Round32 – R32 | 2435 | 8′ | 32 | 1 1/4” | 14.20 |
| 3050 | 10′ | 32 | 1 1/4” | 17.80 | |
| 3660 | 12′ | 32 | 1 1/4” | 21.30 | |
| MF (Speed) RodR32 – Round32 – R32 | 3050 | 10′ | 32 | 1 1/4” | 17.90 |
| 3660 | 12′ | 32 | 1 1/4” | 21.45 | |
| 4270 | 14′ | 32 | 1 1/4” | 25.10 | |
| Extension RodR38 – Round39 – R38 | 3050 | 10′ | 39 | 1 17/32” | 25.50 |
| 3660 | 12′ | 39 | 1 17/32” | 30.60 | |
| 4270 | 14′ | 39 | 1 17/32” | 35.40 | |
| MF (Speed) RodR38 – Round39 – R38 | 3050 | 10′ | 39 | 1 17/32” | 26.50 |
| 3660 | 12′ | 39 | 1 17/32” | 31.60 | |
| 4270 | 14′ | 39 | 1 17/32” | 36.40 | |
| Extansion RodT38 – Round39 – T38 | 3050 | 10′ | 39 | 1 17/32” | 25.50 |
| 3660 | 12′ | 39 | 1 17/32” | 30.60 | |
| 4270 | 14′ | 39 | 1 17/32” | 35.40 | |
| MF (Speed) RodT38 – Round39 – T38 | 3050 | 10′ | 39 | 1 17/32” | 26.50 |
| 3660 | 12′ | 39 | 1 17/32” | 31.60 | |
| 4270 | 14′ | 39 | 1 17/32” | 36.40 | |
| Extension RodT45 – Round46 – T45 | 3050 | 10′ | 46 | 1 3/4” | 35.80 |
| 3660 | 12′ | 46 | 1 3/4” | 43.00 | |
| 4270 | 14′ | 46 | 1 3/4” | 50.10 | |
| MF (Speed) RodT45 – Round46 – T45 | 3050 | 10′ | 46 | 1 3/4” | 36.40 |
| 3660 | 12′ | 46 | 1 3/4” | 43.70 | |
| 4270 | 14′ | 46 | 1 3/4” | 50.70 | |
| Extension RodT51 – Round52 – T51 | 3660 | 12′ | 52 | 2” | 54.20 |
| 4270 | 14′ | 52 | 2” | 63.50 | |
| MF (Speed) RodT51 – Round52 – T51 | 3660 | 12′ | 52 | 2” | 55.70 |
| 4270 | 14′ | 52 | 2” | 64.80 | |
| Extension RodR32 – Round32 – R32 | 915 | 3′ | 32 | 1 1/4” | 5.50 |
| 1220 | 4′ | 32 | 1 1/4” | 7.32 | |
| 1525 | 5′ | 32 | 1 1/4” | 9.18 | |
| 1830 | 6′ | 32 | 1 1/4” | 10.95 | |
| MF (Speed) RodR32 – Round32 – R32 | 915 | 3′ | 32 | 1 1/4” | 5.45 |
| 1220 | 4′ | 32 | 1 1/4” | 7.28 | |
| 1525 | 5′ | 32 | 1 1/4” | 9.10 | |
| 1830 | 6′ | 32 | 1 1/4” | 10.72 | |
| Extension RodT38 – Round39 – T38 | 1220 | 4′ | 39 | 1 17/32” | 9.20 |
| 1525 | 5′ | 39 | 1 17/32” | 10.25 | |
| 1830 | 6′ | 39 | 1 17/32” | 15.30 | |
| MF (Speed) RodT38 – Round39 – T38 | 1220 | 4′ | 39 | 1 17/32” | 9.50 |
| 1525 | 5′ | 39 | 1 17/32” | 11.25 | |
| 1830 | 6′ | 39 | 1 17/32” | 16.30 | |
| MF (Speed) RodT45 – Round46 – T45 | 1525 | 5′ | 46 | 1 3/4” | 18.50 |
| 1830 | 6′ | 46 | 1 3/4” | 22.20 | |
| MF (Speed) RodT51 – Round52 – T52 | 1525 | 5′ | 52 | 2” | 17.85 |
| 1830 | 6′ | 52 | 2” | 28.10 | |
Connected at one end to a rock drill and at the other to a taper drill bit, the taper drill rod serves as the conduit for transmitting power, enabling the drill bit to perform its work. An advanced version of integral drill rods, the tapered drill rod typically features a forged collar that ensures the shank maintains the correct striking face position within the rock drill. The effective length of the tapered drill rod, measured from the collar to the bit end, typically ranges from 0.6 meters to 3.6 meters.
Parameters:
Features:
The Fully-Carburized Taper Drill Rod undergoes a carburization process to enrich its surface carbon content, significantly boosting both its surface hardness and overall structural strength. This enhancement extends the service life of the taper drill rod. In comparison to traditional taper drill rods, the Fully-Carburized version excels in strength and abrasion resistance. Within similar industrial and mining applications, its lifespan surpasses that of standard taper drill rods by several folds.
Available taper degrees include: 4°46’, 6°, 7°, 11°, and 12°.
Shank specifications offered are: Hex.19mm, Hex.22mm, and Hex.25mm.
Beyond offering standard drill rod lengths, our company provides customized lengths tailored to meet our clients’ specific requirements.
R22 (7/8 “) Extension Drilling TOOLS, also known as R22 series 7/8 inch extension drilling tools, is a professional drilling equipment.
