A down-the-hole drill, usually called DTH Drilling Rig, is basically a mini jackhammer screwed on the bottom of a drill string. The speedy hammer activity breaks hard stone into little flakes and dust and can be dismissed evident by the air exhaust in the DTH hammer.
[pdf] This DTH drilling rig is specifically designed for photovoltaic foundation pile holes. It is equipped with an 86kW engine and a high-efficiency desert air filter, supporting a maximum drilling diameter of 500mm.
[pdf] As the name implies, without affecting the function of the excavator, the excavator can be transformed into a hydraulic rock drilling rig, down-the-hole drilling rig, or spiral drilling rig by using the excavator's own breaker oil circuit, connecting a special hydraulic conversion device, and removing the bucket.
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