Shank Adapters

The shank adapter is a part connected with a rock drill at one end and a drill rod at the other end. It is an important part of rock drills and drilling tools. It is mainly used in mining operations, using high-quality alloy steel as raw material, and has undergone overall carburizing treatment. Special CNC ensures quality of shank, internal water holes, and side water holes. The shank adapter is uniformly heat treatment and scientifically straightened with precision instruments to ensure straightness and resistance. The working environment is harsh, so the quality and performance requirements of the shank adapter are very strict.

Working Principle:

During the rock drilling operation, the rock drill transmits the impact energy and rotational torque to the rock drilling tools through the shank adapter and the rock is broken by the drill bit. In the rock drilling operation, the shank adapter not only bears the high-frequency impact and strong torsion of the rock drill but also suffers corrosion and wear by the mineral water and slag. As one of the supporting drilling tools for rock drilling,  the drill shank has a definite internal relationship between its thread structure and the connecting thread structure and precision of the supporting drilling tools. It should meet the requirements of convenient loading and unloading, labor saving, reliable connection, good wear resistance, and high service life during use. Kelleg’s shank adapters are made of high-quality alloy steel and advanced heat treatment to ensure our reliable quality. At the same time, we provide high-quality shank adapters for most brands of rock drills.  

Shank adapter includes two types: shank adapter for pneumatic guide rock drill and hydraulic rock drill shank adapter.

At present, there are more than 200 kinds of rock drilling machines of various types, and different types of rock drilling machines need to choose different shank adapters.

Shank Adapter Type

Shank adapter for pneumatic guide rock drill: It is suitable for the small rock drill and can be operated manually.

Shank adapter for Atlas Copco rock drill: It is suitable for Atlas Copco rock drill, one of the most commonly used rock drills.

Shank adapter for Sandvik/Tamrock rock drill: It is suitable for Sandvik/Tamrock rock drill, one of the most commonly used rock drills.

Thread size

• R28
• R32
• R35
• R38
• T38
• T45
• T51

Our shank adapters are suitable for different equipment, such as Sandvik, Atlas Copco, and Furukawa.

What are the types of shank adapter?

There are three types of shank adapters: flange-type shank adapters, lug-type shank adapters, and spline adapters.

How to improve the service life of the shank adapter?

• Ensure the machining quality of recess of thread portion and the circular arc transition of sealing ring groove.
• The good carburizing heat treatment process ensures high notch impact bending fatigue strength of shank adapter material.

What is the design principle of the shank adapter?

• Meet the requirements of high frequency, high power impact, and rotating stress of rock drill.
• It is necessary to consider the accuracy of the geometry and dimensions of the cylinder liner of the rock drill.

What is the typical process of the shank adapter?

Raw material inspection – Cutting to length – Straightening – Forging blank – Softening annealing – Machining – Heat treatment – Surface cleaning – Grinding outer circle – Anticorrosion – Packaging – Storage.