Conan The Barbarian movie question

This is a general question about a movie that will obviously involve opinion. Mods, pick your forum…

I just picked the DVDs of Conan the Barbarian and Conan the Destroyer. Cinematic classics? Surely not, but fun nonetheless.

My question is this:

When Thulsa Doom’s men raze young Conan’s village and take him away, he is marched halfway across the continent and put to pushing this big spinny thing. I had also just assumed from my hazy memories of the movie that it was a big grist mill or something. On re-watching the movie, it’s definitely not. There doesn’t seem to be any purpose to it at all.

Obviously, it doesn’t have a commercial use, as we start out with quite a few little slave childrens pushing it, and as we go through the montage the number of slaves dwindles until it’s just Conan. Were this a viable commercial enterprise, they’d obviously replenish the slave pool as others left, to keep up with production.

So what is it?

And does it have any connection to that symbol Conan wears around his neck? (that looks like the steering wheel on a pirate ship)

Feel free to add other Conan comments or questions.

One
The wheel of pain as it is called according to the commentary with director and Govenator was meant to grind grain. It dosn’t look like but suspend your disbelief, the pint of the scene goes back to the Nitchzech (SP?) quote at the beginning and to explain why Conan is built like the Governator.

Two
The where thing he wears is the symbol of the gladiator train who buys him you’ll see it in his corner during the pit fighter sequence