3700mm T38-H35-R32 MF Extension Drill Rod For Tunneling Hard Rock
Extension rods, also known as extension drill steel, extension drill rods, or extension steel, are available in both hexagonal and round cross sections. Hexagonal rods offer greater rigidity, improved energy transfer efficiency, and enhanced flushing capabilities. Round rods are typically lighter and preferred for extension drilling applications. These rods feature duplicate threads on each end, with longer steel sections having larger diameters.
Key Features
- Available in hexagonal and round cross sections
- Hexagonal rods provide superior rigidity and energy transfer
- Round rods offer lighter weight for extension drilling
- Duplicate threads on each end
Technical Specifications
| Thread Type |
R22, R25, R28, R32, R38, T38, T45, T51 |
| Diameter |
Hex 25, Hex 28, Hex 32, Hex 35, RD 39, RD 46, RD 52 |
| Rod Type |
Round type and hexagonal type |
| Material |
High strength alloy steel from top-tier manufacturers |
| Processing |
CNC milling and proprietary heat treatment |
| Certification |
ISO9001 |
| MOQ |
No minimum order quantity for testing and trial orders |
| Drill Rod Type |
Male-Male Rod, Male-Female Rod |
Product Advantages
- Premium quality raw materials
- Precision CNC machining and heat treatment
- Exceptional wear resistance
Applications
Ideal for tunneling, mining, quarrying, blasting, and infrastructure construction projects.
Packaging
Shipped in wooden cases or bundles for secure transportation.
Product Images
