An extension drill rod serves as a crucial tool that links with a drill bit, pairing seamlessly with a rock drilling machine for drilling into rock or soil.
Our company's drill rods are crafted from high-quality, premium alloy steel, ensuring strength and durability. They are available in both hexagonal and round configurations. The Sandvik rods are meticulously designed to provide straighter holes with minimal deviation and an extended service life.
Body Types:
Extension rods come in two primary shapes: round and hexagonal.
Hexagon rods offer increased rigidity, weight, and energy transfer efficiency, along with improved flushing capabilities.
Round rods, generally lighter than their hexagonal counterparts, are typically employed in extension drilling applications.
Thread Types:
There are two main thread types: R-thread and T-thread.
R-thread specifications include R25, R28, R32, R38, etc. The dimensions and button profile of the R-thread adhere to the industry standard ISO10208.
T-thread specifications include T38, T45, T51, etc. The dimensions and button profile of the T-thread are primarily based on corporate standards that closely align with
In the demanding world of mining, tunneling, and construction, precision and durability are non-negotiable. When your operation requires unmatched penetration depth, vibration resistance, and long service life, the T45 extension rod emerges as the superior choice. Engineered for strength, reliability, and performance, the T45 extension rod has become the global standard for heavy-duty rock drilling applications.
If you're looking to boost drilling efficiency and reduce downtime, this in-depth guide explains why the T45 extension rod should be your first choice.
A T45 extension rod is a high-strength, heat-treated alloy steel rod used in top hammer rock drilling. Featuring a T45 thread profile—known for its robust torque transmission and superior wear resistance—this extension rod connects drill bits to shank adapters, extending the reach and efficiency of drilling operations.
Whether in surface mining, underground tunneling, or quarrying, the T45 extension rod ensures optimal energy transfer and reduced rod handling time.
Thread Type: T45 – providing excellent strength and connection stability
Material: Premium-grade alloy steel with deep heat treatment
Length Options: 915mm to 6,400mm available (customizable)
Straightness Tolerance: ≤ 0.5mm/m for precise drilling
Hardness: HRC 55–60 for extended wear resistance
Connection Ends: T45 Male–Male or T45 Male–Female threads
Compatibility: Designed for use with top hammer drill rigs from brands like Sandvik, Epiroc, Furukawa, and others
If your project demands performance, reliability, and cost-efficiency, the T45 extension rod delivers on all fronts:
Crafted from heat-treated, high-tensile steel, the T45 extension rod withstands the extreme forces of top hammer drilling. Its longevity minimizes replacement cycles and enhances operational uptime.
The T45 thread profile is designed for maximum impact energy transfer with minimal energy loss, ensuring faster penetration rates and superior productivity.
Built to absorb and distribute intense shock waves, the T45 extension rod reduces wear on connected components and ensures safer, more efficient drilling.
With precision machining and advanced metallurgy, the T45 extension rod resists cracking, thread deformation, and fatigue, even under extreme conditions.
Whether you're working with Atlas Copco, Sandvik, or Furukawa top hammer drill rigs, the T45 extension rod integrates seamlessly, eliminating costly downtimes caused by incompatibility.
The T45 extension rod is the preferred choice across various industries:
Surface Mining: For drilling in open-pit mines and quarries
Underground Tunneling: Extends reach in confined spaces with high impact resistance
Construction Projects: Used in anchor bolt drilling, foundation work, and blasting
Hydropower Stations: Ideal for deep borehole drilling in dam construction
Bench Drilling & Production Drilling: For high-speed, repetitive operations requiring extreme reliability
Wherever powerful penetration and long rod life are essential, the T45 extension rod is the solution of choice.
| Feature | T38 Rod | T45 Extension Rod | T51 Rod |
|---|---|---|---|
| Thread Diameter | 38mm | 45mm | 51mm |
| Energy Transfer | Moderate | High | Very High |
| Weight | Light | Balanced | Heavy |
| Application Depth | Medium | Medium–Deep | Deep Drilling |
| Wear Resistance | Good | Excellent | Excellent |
The T45 extension rod offers the perfect balance between weight, depth capacity, and strength, making it the most versatile option across mid- to deep-range drilling operations.
To maximize the life and performance of your T45 extension rod, follow these simple guidelines:
Lubricate Threads: Apply thread grease before and during use
Check for Wear: Regularly inspect threads and ends for deformation
Rotate Rods: Use rod rotation to balance wear across sets
Proper Storage: Store in a dry, horizontal position to prevent bending
Use with Compatible Bits: Mismatched components increase stress and reduce rod life
A well-maintained T45 extension rod can significantly reduce operational costs and increase drilling efficiency.
When purchasing, consider the following key aspects:
Shorter rods (915mm–1830mm) are ideal for tight tunnels, while longer rods (3050mm–6400mm) suit deep open-pit projects.
T45 M/M (male/male) and T45 M/F (male/female) options allow flexibility based on your drilling setup.
Ensure it’s manufactured with B-grade or C-grade heat-treated steel for maximum toughness.
High-straightness tolerance ensures accurate directional drilling and lower bit deviation.
Choose a supplier with:
ISO-certified production and quality control
Custom length & thread options available on demand
Bulk discounts for mining and construction contractors
Prompt global shipping and 24/7 after-sale support
Transparent specs and testing data provided for every batch
When sourcing T45 extension rods, trust only manufacturers that specialize in rock drilling tools, not general hardware.
In drilling operations, time is money. Every minute spent swapping rods, replacing broken gear, or dealing with thread failure adds up to massive costs. By investing in T45 extension rods, you ensure:
✅ Fewer downtimes
✅ Higher penetration rates
✅ Lower operational costs
✅ Greater safety and reliability
Whether you’re a procurement officer, project engineer, or drilling contractor, T45 extension rods offer the performance edge you’ve been looking for.
Explore our full line of T45 extension rods engineered for maximum performance and global standards. Need help choosing the right size or thread configuration? Our technical experts are standing by to assist.
T45 Extension Rod – Built to Perform. Engineered to Last.
Get in touch now for pricing, technical specs, and fast delivery. Experience the difference that professional-grade drilling equipment can make.
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