Casing advancement with Atlas Copco's Symmetrix - animation

[AtlasCopcoCMT]

The illustration shows how the exhaust air from the hammer brings out the cuttings.

[cooliphie]

can you please explain what happened from 0.32. where sth moves up and down.

[jimthecrim]

@cooliphie Hi. The part you see moving up and down is actually the piston striking the bit inside the down the hole hammer. Hope this helps! Cheers.