T38 CNC Rock Drilling Tools For Tunneling Milling Extension Rod

Description

Male/Female (M/F) rod, speed rod:
M/F drill steel is an alternative to couplings sleeves to include the female part of the threaded connection as an integral part of the drill steel. M/F drill steel provides more rigid connections and is easier to uncouple and handle. The service life also tends to be better than with separate couplings. The advantages of drilling with M/F steel include: easy handling, quicker uncoupling, tighter connections, the potential to drill straighter holes, and longer service life.
For extension rod and M/F steel process, the below two different types of heat treatment are used to strengthen high speed and powerful percussive drill string components to maximize their performance and reliability. Longer steel larger in diameter, conventional extension steel, Hexagonal and round cross sections are available.

Carburizationis a process used to harder the entire rod surface both internally and externally to strengthen and extend the life of the rod.

High frequency induction is process where only the thread ends of the rod are hardened to lengthen thread life.

Drill rod using T38 thread system. With wrench flats to aid in coupling/decoupling of rods for extension drilling.

• R28 thread system
• Suitable for small hole range

Color: Based on Customer requirements

Material: Tungsten carbide and high strength alloy steel

Processing: CNC milling and proprietary heat treatment process

Type: T38 Extension Rod T38-Round 39-T38 Flushing Hole 14.5 mm Wrench Flat 32 mm

Applications
• Underground Mining
• Tunneling

Competitive Advantage
High strength chromium-molybdenum steel with high fatigue strength and excellent wear resistance

Specification