Top hammer rock drilling tools can transmit intensive impact energy into the rock with the least possible loss of energy. It has the characteristics of good rock breaking effect, high penetration rates and high productivity. Rock drilling machine with compressed gas or hydraulic oil as the power, the equipment impact power can be designed according to requirements, and it has a higher drilling rate. The depth of the blast hole drilled by top hammer rock drilling tool is usually ≤35m, and the hole diameter ≤152mm. Top hammer percussion rock drilling tools include:

1. Light weight rock drilling tools

The weight of light rock drilling machine is usually less than 35kg. It works by hands or air-leg as its working platform, and drilling impact power and propulsion force are relatively small. Common drill tools include H19mm, H22mm, H25mm hexagonal integral drill rod and tapered drill tools. With 38-42mm chisel bit, cross bit, and button bit with four teeth or five teeth. It is one of the most widely used rock drilling tools in China.

2. Benching drilling tools

In China, underground mine resources occupy a large proportion in all mining resources. In the exploitation of underground mining resources, different techniques of rock drilling and blasting should be adopted according to the mine conditions. Generally, the depth of underground mining can be divided into three forms: shallow hole drilling (hole depth 6m), medium hole drilling (hole depth 10-30m) and deep hole drilling (hole depth 50-60m).

3. Drifting and tunneling tools

The construction methods of rock drilling and blasting are rock drilling and mechanical rock breaking. Domestic construction is mainly based on rock drilling and blasting method. Its working area is concentrated in the tunnel and culvert excavation in the construction of infrastructure engineering, and the tunnel excavation in the production and construction of underground mine.

At present, rock drilling tools matched for full hydraulic excavation rock drilling rigs, with H22mm tapered drill rods, 38-42mm chisel bits, and four-tooth and five-tooth buttons bits.

4. Open-cutting drilling tools

Full-hydraulic open-cut rock drilling rigs are widely used in domestic construction departments, mainly used in open-cut mines, cement building materials industry, stone market, construction and road engineering quarries, water conservancy and hydropower projects, and infrastructure construction sites.

Rock drilling tools are supporting products of rock drilling machinery, which has the features of varieties of products, fast drilling speed, long service cycle, convenient operation and so on. It is believed that with the development of China’s economic construction, the market of drilling equipment and drilling tools will have huge development potential.