How to drill with cluster hammer

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To overcome the shortage of traditional rotary drill rig-low drilling efficiency in hard rock formation, we develop the cluster hammer that can
match with most of the rotary drill rig such as Bauer/Soilmec/Mait/Casagrand/Sany rotary drill rigs.
First, refitting your rigs and then connect the cluster hammer by the adaptors.
Second, drilling with rock bucket and then using the double wall casing tube in case of the soil collapse. Once reach the granite layer, drilling with cluster hammer that have fast speed to penetrate the hard rock.
Welcome to click the video of cluster hammer in jobsite in youtube as below.

https://www.youtube.com/channel/UCGnUteLiAqNpDuCf8y1HMRQ

https://youtu.be/xtY9sLPBBpk

https://youtu.be/q9urnQsr1Ro

https://youtu.be/9tQn3Yg827g

https://youtu.be/DTnA0jq49D4