Tunneling Extension Rods R32 T38 T45 T51 GT60- SHANDIKE Drilling Tools
In underground mining and tunneling, whether the hole is straight and the drilling speed is fast largely depends on your drill tools. Among these, tunneling extension rods (also known as drifter rods or extension drill steels) play a critical role in transferring impact energy from the shank adapter to the drill bit.
Thread galling, rod breakage, and costly downtime—these problems often start with the rod. SHANDIKE’s top hammer drilling tools are built for tough rock conditions, with durability as the core advantage.
1、Specifications
Designed to fit various drill jumbos and rock conditions, we offer a wide range of sizes:
- Thread profiles: R22, R25, R28, R32, R35, R38, T38, T45, T51, GT60
- Rod types: Standard extension rods (male-male threads, used with separate coupling sleeves); M/F speed rods (male-female thread in one piece)
- Body geometries: Hexagonal (22–35mm, high rigidity, good flushing); Round (32–52mm, lighter, suitable for deep-hole bench drilling)
- Length range: 600mm to 6400mm
2、Why Choose SHANDIKE?
SHANDIKE is an ISO9001-certified manufacturer with a 12,000㎡ production base in Luoyang, China, using European-standard steel processing technology.
1. Premium steel and carburization
We use high-strength hollow alloy steel (e.g., 23CrNi3Mo or equivalent 4140) with a full carburization heat treatment. The surface and threads achieve high hardness, while the core remains tough, offering strong fatigue resistance and reducing early rod failure.
2. Straight holes, minimal energy loss
Precision CNC thread cutting ensures accurate concentricity. Whether using R32 drifter rods or T45 speed rods, the tight thread fit maximizes energy transfer, resulting in straighter holes and faster penetration rates.
3. Compatible with automated drill rigs
Our M/F speed rods are manufactured with strict tolerances, making them fully compatible with automatic rod handling systems on major rig brands such as Sandvik, Epiroc, and Furukawa.
3、Full Range of Drilling Tools
Beyond tunneling extension rods, SHANDIKE also offers:
- Thread button bits (matching R32, T38, T45, T51, etc.)
- Shank adapters and coupling sleeves
- Taper drilling tools (for YT24, YT29A leg drills)
- DTH drilling equipment (for deep-hole blasting and water well drilling)
4、Trusted by Global Customers
From Australia and the US to Peru, South Africa, and Southeast Asia, numerous mines and geotechnical projects use SHANDIKE tools to lower their total cost per meter drilled. Our technical team can customize thread configurations, flushing hole diameters, and heat treatment specifications based on your rock hardness and rig parameters.
5、Contact Us
For factory-direct wholesale pricing or a product catalog, reach out to us. We reply within 24 hours.
- Company: Luoyang Shandike Mechanical Equipment Co., Ltd.
- Website: sdkdrillingtools.com
- Email: [email protected]
- Tel / WhatsApp: +86 19937978951
