Square hole digging tractor attachment - GIF

[Saltfever]

I don't know why a drilled square hole would be useful.

Often required when a post is supporting a cantilever load. (e.g., a free swinging gate). A round post will eventually sag as the soil is displaced away by the force acting on it. A square hole (actually, the flat side) has a lot more surface area reacting the lateral force. "Square" is frequently specified by soil engineers but often ignored by contractors simply because they only have a round drill or auger. Nobody wants to spend for hand digging.

[Wildwilly]

Engineering was VERY lacking on this design as the “digger” should have thrown the dirt away from the operator! As for usefulness......graves!

[hemmjo]

Engineering was VERY lacking on this design as the “digger” should have thrown the dirt away from the operator! As for usefulness......graves!

I was thinking along similar lines when it first started to dig, but the deeper it got the more the dirt went behind the machine, away from the operator.

[old kodger]

and after all that, the bloody hole is round at the bottom.

[Toolmaker51]

How does engineer "A" get all that mechanism designed; bypassing a helical tooth arrangement or rotating the other, more logical direction, letting the chassis aid stability?

[old kodger]

I wonder what the life of the chains is, it looks like good grinding paste