Steel Drill Rod
2.When used with hydraulic rock drills, the utilization rate of impact energy is increased by 18–25%, and the drilling speed is improved by 20–30%.
3.Through fatigue crack control technology, reduce the risk of stress fracture.
Product introduction
Through fatigue crack control technologies (such as optimized transition fillets), the risk of stress fracture is reduced. Product Introduction: Steel Drill Rod is a core tool in rock drilling operations, used to connect the rock drill and the drill bit, transmitting impact energy, torque, and flushing media (such as high-pressure air or water) to achieve tasks such as rock drilling and blast hole formation. Its design integrates high strength, wear resistance, and impact resistance, and it is widely applied in heavy industries such as mining, tunnels, and infrastructure construction.
Steel Drill rod product Parameter (specification)
|
Parameter name |
Steel Drill rod |
Unit |
Outer diameter |
Length |
|
Steel Drill rod |
Y6-specific |
mm |
Φ20 |
340 |
|
Steel Drill rod |
Waveform Threaded R32 t=12mm |
mm |
Φ32 |
800-3660 |
|
Steel Drill rod |
Waveform Threaded R32 t=12.7mm |
mm |
Φ32 |
800-3660 |
|
Steel Drill rod |
Trapezoidal thread connection T38 |
mm |
Φ38 |
1520-3660 |
|
Steel Drill rod |
Trapezoidal thread connection T45 |
mm |
Φ45 |
3550,3660 |
Product feature and application
Structural features:
Material and Heat Treatment: High-strength alloy steel is used, and heat treatment processes such as tempering, normalizing, and surface induction hardening are adopted to obtain high fatigue strength, toughness, and wear resistance.
Critical Component Reinforcement: Areas such as the end in contact with the rock drill piston and stress concentration zones like connection threads/cones undergo special reinforcement treatment to withstand crown piling, crown blasting, or early fatigue fracture.
Application fields:
Vehicle Manufacturing and Maintenance: With the rapid development of the automotive industry, the TB842D is particularly suitable for the
Mining: Open-pit mine blast hole drilling, underground mine tunnel driving, and stope recovery drilling.
Tunnel and Underground Engineering: Excavation operations for railway/highway tunnels, hydraulic tunnels, subways, and other projects, as well as drilling of anchor bolt holes and blast holes.
Infrastructure construction: rock excavation and foundation bearing capacity testing in projects such as water conservancy dams, power station foundations, bridge pile foundations, and large workshops.
Stone quarrying and stone mining:Intelligent mining and secondary crushing of decorative stones such as marble and granite.
Production details
Adapt to complex rock formations: Designed for hard and fissure-developed rocks to reduce the risk of drill rod jamming.
Powder Removal and Cooling: The hollow structure allows the flushing medium to circulate, removing rock powder and cooling the drill string.
Why choose us
1.Outstanding durability and economy
The lifespan of a drill rod is the most direct reflection of its value. Drill rods manufactured from high-performance alloy steel, combined with precise heat treatment processes, can withstand the high-frequency impact of the rock drill piston and the severe wear of rocks. Field tests show that high-quality drill rods have an average lifespan of 169.2 meters in hard granite, far exceeding ordinary products. This means fewer replacement times, longer pure working time, and lower per-operation costs.
2.High-efficiency power transmission and working capability
As the 'drive shaft' between the rock drill and the drill bit, the scientific design of the drill rod directly determines efficiency. Its hollow design allows high-pressure air or water to pass through, effectively cooling the drill bit, discharging rock powder, and maintaining smooth drilling. Additionally, different connection methods such as taper connections (simple, suitable for shallow holes) and threaded connections (secure, suitable for deep holes) ensure reliable power transmission under various working conditions. Drill rods that are precisely matched with the equipment can significantly improve drilling speed.
3.Broad adaptability and flexibility to various operating conditions
Whether you are engaged in open-pit mining, tunnel boring, water conservancy infrastructure, or stone quarrying, there are corresponding drill rod models available for selection. This high degree of adaptability enables drill rods to serve as a reliable foundation for various rock drilling solutions.
FAQ
Q: What are the common failure modes of steel drill rods? How to avoid them?
A: 1.Fatigue fracture: This is the main failure mode of the drill rod, often occurring at stress concentration areas (such as the drill shoulder and surface defects on the rod body). Prevention methods include selecting high-quality drill rods, operating in accordance with specifications to reduce stress concentration, and ensuring the rod body surface is intact.
2.Bit tip 'piling top' or 'blasting top': This occurs at the end of the bit tip due to improper hardness. A hardness lower than HRC49 is prone to 'piling top' (plastic deformation), while a hardness higher than HRC57 tends to cause 'blasting top' (cracking). It is crucial to ensure that the heat treatment hardness of the bit tip falls within the ideal range of HRC50-54.
3.Thread wear or damage: May cause loose or failed connections. Proper use and lubrication should be noted, avoid violent disassembly, and replace severely worn rods in a timely manner.
4.Excessive wear or bending of the rod: This will affect drilling accuracy and efficiency. The drill rod should not be used as a crowbar or for other non-normal purposes. If excessive bending or wear is found, it should be replaced in a timely manner.
Q: What are the essential operational precautions to take when using Steel Drill Rods to extend their lifespan?
A: 1.Drilling Tips: When starting to drill, the impact energy of the rock drill should be set low. Once the drill bit has smoothly penetrated the rock, gradually increase it to the normal parameters. This can prevent damage to the drill rod and drill bit caused by excessively high local stress.
2.Ensure alignment with straight-line operations: Try to ensure that the drill rod, rock drill, and drilling direction are on a straight line as much as possible, avoid working the drill rod in a bent state to reduce additional stress.
3.Ensure smooth powder discharge: Make sure there is sufficient water pressure or air pressure for powder discharge. Poor powder discharge will cause rock powder to repeatedly grind the drill rod and drill bit, leading to excessive wear and drill jamming.
4.Rationally adopt the casing drilling operation: For rock drilling hole depths greater than 2.0 meters, it is recommended to use casing rods, i.e., first use a short drill rod to start the hole, and then continue to extend the drilling with a long drill rod, in order to improve the service life of the drill rods.
Q: What should be noted for the daily maintenance of steel drill rods?
A: 1.Post-use cleaning: After each use, the rock powder and moisture on the rodding bar should be cleaned thoroughly.
2.Inspection and Storage: Regularly inspect the rod for cracks, severe wear, or deformation, especially at the threaded connection areas and the drill bit end. It should be stored in a dry place with multiple support points at the bottom. For long-term storage, regular maintenance and anti-rust treatment should be carried out.
3.Inspection and Storage: Regularly check the rod for cracks, severe wear, or deformation, especially at the threaded connection parts and the drill bit end. It should be stored in a dry place with multiple support points at the bottom. For long-term storage, regular maintenance and anti-rust treatment should be carried out.
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