T38 Drill Rods for Top Hammer Drilling Specification
Drill rods, also known as drill pipes, are critical components used to connect the drill bit to the drilling rig. They facilitate the drilling process by transmitting rotational force and thrust to the drill bit, enabling it to penetrate the ground. Designed to withstand significant torque and pressure during operation, these rods are manufactured with high strength and exceptional wear resistance. Among them, the T38 drill rod is a category of top hammer drilling equipment widely employed in mining and tunnel construction. The term “T38” refers specifically to the thread type and dimensional standards of the drill rod.
Specifications of T38 Drill Rods
Extension Rods
Extension rods, also referred to as M/M drill rods, feature male threads on both ends. Below are common specifications for T38 extension rods:
1. Hex Rods
M/M, T38-H32-R32-2700mm, flushing hole: 16mm
M/M, T38-H32-R32-3090mm, flushing hole: 16mm
M/M, T38-H32-R32-3700mm, flushing hole: 16mm
M/M, T38-H32-R32-4300mm, flushing hole: 16mm
M/M, T38-H32-R32-4915mm, flushing hole: 16mm
M/M, T38-H32-R32-5525mm, flushing hole: 16mm
M/M, T38-H35-R32-2700mm, flushing hole: 16mm
M/M, T38-H35-R32-3090mm, flushing hole: 16mm
M/M, T38-H35-R32-3700mm, flushing hole: 16mm
M/M, T38-H35-R32-4300mm, flushing hole: 16mm
M/M, T38-H35-R32-4915mm, flushing hole: 16mm
M/M, T38-H35-R32-5525mm, flushing hole: 16mm
2. Round Rods
M/M, T38-RD39-T38-1220mm, flushing hole: 14.5mm
M/M, T38-RD39-T38-1525mm, flushing hole: 14.5mm
M/M, T38-RD39-T38-1830mm, flushing hole: 14.5mm
M/M, T38-RD39-T38-3660mm, flushing hole: 14.5mm
M/M, T38-RD39-T38-4270mm, flushing hole: 14.5mm
3.Speed Rods
Speed rods, or M/F rods, are designed with one male and one female thread end, allowing direct connection with other rods for deeper drilling without requiring a coupling sleeve. Common specifications include:
M/F, T38-RD39-T38-1220mm, flushing hole: Ø14.5mm, Female end OD: 56mm
M/F, T38-RD39-T38-1525mm, flushing hole: Ø14.5mm, Female end OD: 56mm
M/F, T38-RD39-T38-1830mm, flushing hole: Ø14.5mm, Female end OD: 56mm
M/F, T38-RD39-T38-3050mm, flushing hole: Ø14.5mm, Female end OD: 56mm
M/F, T38-RD39-T38-3660mm, flushing hole: Ø14.5mm, Female end OD: 56mm
M/F, T38-RD39-T38-4270mm, flushing hole: Ø14.5mm, Female end OD: 56mm
Guide Rods
T38-RD46-T38-1220mm, flushing hole: Ø17mm, Female end OD: 56mm
T38-RD46-T38-1830mm, flushing hole: Ø17mm, Female end OD: 56mm
T38-RD46-T38-3660mm, flushing hole: Ø17mm, Female end OD: 56mm
T38-RD46-T38-4265mm, flushing hole: Ø17mm, Female end OD: 56mm
Guide Tubes
T38-RD56-T38-1830mm, Diameter: 64mm
T38-RD56-T38-1830mm, Diameter: 64mm
T38-RD56-T38-3050mm, Diameter: 64mm
T38-RD56-T38-3660mm, Diameter: 64mm
T38-RD64-T38-3660mm, Diameter: 76mm
These standard specifications and parameters assist engineers and technicians in selecting suitable T38 drill rods to enhance drilling efficiency and project quality in various applications. The appropriate model should be chosen based on specific project needs and geological conditions. It is also essential to perform regular inspection and maintenance to ensure all connections remain secure, and to check for significant surface wear or cracks. Such practices help prolong the service life of the rods and maintain drilling operational safety.
