Earth drilling compilation - GIF

Earth drilling compilation.

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Previously:

https://www.homemadetools.net/forum/...680#post182669
https://www.homemadetools.net/forum/...834#post186746
https://www.homemadetools.net/forum/...151#post203566
https://www.homemadetools.net/forum/...473#post131908
https://www.homemadetools.net/forum/...400#post196670

Those augers are great... if you don't hit a big rock!

How does the second apparatus work?

I think it's a cable percussion drilling rig, modified for working in sandy collapsing material. The giant rube-goldberg contraption is not what cable percussion drilling usually looks like.