T45 Diameter 38mm Extension Drill Rods User Manual

Introduction to T45 Extension Drill Rods

The extension drill rods of a tunnel drilling rig are crucial components in the operation of drilling through hard media such as rocks. These rods have male threads on both ends and serve to transmit the impact energy and torque of the rock drill to the drill bit. Their main purpose is to drill holes in rocks, creating conditions for subsequent blasting, excavation, and other processes. The T45 refers to the tread type for these rods. This article will provide detailed information about T45 extension drill rods.

Raw Material of T45 Extension Drill Rods

T45 extension drill rods are typically made of high-quality alloy structural steel, such as 23CrNi3Mo. This material improves the comprehensive properties of the rods, including strength, toughness, and wear resistance. By using alloying, the rods can adapt to more severe working conditions.

Shape and Size of T45 Extension Drill Rods

The length of the drill rods generally depends on the drilling depth requirements of the rock drilling rig. Common lengths include 3060mm and 3660mm. One end of the drill rod connects to the shank adapter of the rock drill, which has a specific shape and size to match the coupling sleeve of the rock drill. This ensures effective energy transmission. The other end connects to the drill bit through a threaded connection.

Usage of T45 Extension Drill Rods

When installing the drill rods, it is important to ensure that they are securely connected to the rock drill and the drill bit. During rock drilling, the operator should adjust the impact frequency and pressure of the rock drill according to the nature of the rock to avoid excessive impact and overload, which can extend the service life of the drill rods.

Regular inspections of the drill rods for wear, cracks, and other defects are essential. If any of these issues are found, the drill rods should be replaced in a timely manner. It is also important to clean the drill rods regularly to remove impurities such as rock debris and oil from the surface. When storing the drill rods, they should be placed in a dry and ventilated place to avoid moisture and rust.

For worn drill rods, repair technologies such as surfacing welding can be used to reduce the cost of use.

In conclusion, T45 extension drill rods are vital components of tunnel drilling rigs that are used to drill holes in rocks. By using high-quality alloy structural steel and being regularly inspected, cleaned, and maintained, these rods can ensure effective and efficient drilling operations.