Water well drilling rig - video

Water well drilling rig. By adam courville. 0:55 video:

https://www.youtube.com/watch?v=kEyLMp69cwA


Previously:

https://www.homemadetools.net/forum/...768#post140120

I think you need a contact at the fanbelt store you gonna need some spares.
How does the drillblock manage to drop down with the drilling progress?

I believe, that the drill rod is square and just slips down a square hole in the pulley. The pulley probably isn't under much load as you might notice the water supply is a pressure washer. Most likely the nozzle down-bore is eroding the hole more than mechanical action.