The down-the-hole drilling machine is suitable for large-diameter blast hole rock drilling operations in small and medium-sized mines, road construction, water conservancy, and stonework, as well as dri. [pdf]
[FAQS about 70 type down-the-hole drilling rig FAQ]
When drilling through rock, the right HDD tool is the difference between an easy (well, "easy for HDD) job and hours of wasted time. Here’s what you need to know about the types of rock bits on the market. [pdf]
To make a hammer drill, most manufacturers start with a drill driver and add a hammer mechanism behind the chuck. In most cases, it adds a small amount to the overall length and a few ounces to the overal. [pdf]
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