The T38 Extension Rod serves as a crucial tool that connects seamlessly with a drill bit, specifically designed for use with a rock drilling machine in the excavation of rock or soil.
Engineered by our company, these drill rods are meticulously crafted from premium, high-strength alloy steel, offering a choice between hexagonal and round configurations. In line with Sandvik's commitment to excellence, our T38 Extension Rods are developed to ensure straighter holes with minimal deviation and an extended service life.
Body Types:
The T38 Extension Rod is available in two distinct shapes: round and hexagonal.
Hexagonal rods exhibit enhanced rigidity, weight, and energy transfer efficiency, thereby improving flushing capabilities.
Round rods, comparatively lighter, find common application in extension drilling scenarios.
Thread Type:
Two primary thread types define our T38 Extension Rod range.
R-thread specifications such as R25, R28, R32, R38, etc., adhere to the industry standard ISO10208 in terms of basic dimensions and button profile.
T-thread specifications, including T38, T45, T51, etc., closely align with corporate standards, ensuring uniformity across the board.
In high-impact drilling environments where efficiency, depth, and precision are essential, the T38 extension rod is the go-to tool for professionals. With its solid performance, optimal energy transfer, and long-lasting durability, the T38 extension rod is a vital component in top hammer drilling systems.
Whether you're working in mining, tunneling, or rock excavation, this guide explains why the T38 extension rod is the smart investment to maximize productivity and minimize costs.
A T38 extension rod is a specially engineered drilling rod designed for top hammer drilling applications. It features T38 thread profiles, offering strong torque resistance and smooth energy transfer between the drill bit and the shank adapter. The result? Faster penetration, lower fuel consumption, and enhanced overall drilling performance.
Constructed from high-grade alloy steel and heat-treated for extreme hardness, the T38 extension rod is built for longevity and optimal operation in harsh environments.
Thread Type: T38 (38mm) male/male or male/female
Rod Lengths Available: 915mm to 6,400mm
Material: Premium heat-treated alloy steel
Hardness: HRC 55–60 for excellent wear resistance
Straightness Tolerance: ≤ 0.5mm/m
Design: Hexagonal or round cross-section options
With these specifications, the T38 extension rod offers the ideal combination of weight, strength, and adaptability for various drilling tasks.
The T38 extension rod offers significant benefits across a wide range of drilling operations:
Thanks to its precision thread design, the T38 extension rod ensures minimal energy loss during impact transmission, leading to faster drilling speeds and better fuel efficiency.
Engineered with advanced heat treatment and superior steel grades, the T38 extension rod resists wear, deformation, and fatigue, even under the most demanding drilling conditions.
Frequent rod changes can halt productivity. With a T38 extension rod, you'll enjoy longer intervals between replacements, boosting your site efficiency.
Compatible with a variety of drilling rigs and bits, the T38 extension rod is ideal for both surface and underground drilling across multiple industries.
The robust T38 threads allow easy makeup and breakout while resisting galling and seizing. This means quicker setup and less maintenance on the job site.
The T38 extension rod is widely used across industries that demand high-precision rock drilling:
Mining: For bench and production drilling
Tunneling: Ideal for confined, high-vibration environments
Quarrying: Efficient rock fragmentation and extraction
Hydropower & Infrastructure: Reliable support in foundation and bolt-hole drilling
Construction: Used for rock bolting and blasting projects
Wherever you need durability and power, the T38 extension rod delivers consistent, high-performance results.
| Feature | T38 Extension Rod | T45 Extension Rod | T51 Extension Rod |
|---|---|---|---|
| Thread Diameter | 38mm | 45mm | 51mm |
| Drilling Depth | Medium | Medium-Deep | Deep |
| Rig Compatibility | Light–Mid Drills | Mid–Heavy Rigs | Heavy-Duty Rigs |
| Energy Transfer | High | Higher | Highest |
| Application Focus | Versatile | Power & Reach | Deep Precision |
If you're balancing maneuverability, power, and cost, the T38 extension rod is the perfect middle-ground solution.
To ensure peak performance and long service life of your T38 extension rod, follow these expert tips:
✅ Lubricate Threads before use to reduce friction
✅ Rotate Rods periodically to even out wear
✅ Inspect Threads for signs of damage or wear
✅ Clean after Each Use to remove debris and contaminants
✅ Store Properly in a dry, covered environment to prevent corrosion
These maintenance steps can significantly improve the lifespan of your T38 extension rod and maintain optimal performance.
When selecting a T38 extension rod, consider the following:
Length: Choose based on your required drilling depth
Thread Ends: Select male/male or male/female based on your drill setup
Material Grade: Always opt for high-tensile, heat-treated steel
Cross-Section Shape: Hex rods offer better torque; round rods are easier to handle
Brand Compatibility: Ensure the rod fits your drill rig (e.g., Sandvik, Epiroc, Furukawa, etc.)
Look for suppliers with:
✅ ISO-certified production
✅ Competitive pricing and bulk order discounts
✅ Technical support and after-sales service
✅ Global shipping capabilities
✅ Customized rod length and thread options
Only trust manufacturers with proven experience in producing high-performance rock drilling tools.
A high-quality T38 extension rod is more than just a drilling accessory—it's an efficiency multiplier. It reduces costs, minimizes downtime, and ensures that every job is completed faster and more effectively.
With precise thread design, optimal length options, and world-class metallurgy, the T38 extension rod is the smart, long-term investment for any drilling contractor or mining operation.
T38 Extension Rod — Your Partner in Precision Drilling
Don’t compromise on your drilling performance. Upgrade your operation with our T38 extension rods today. Contact us now for:
Free technical consultation
Custom specifications
Fast shipping and reliable stock
👉 Boost your productivity with premium T38 extension rods built for professionals.
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