Originally Posted by toastydeath  To avoid confusion, it's worth noting that only swiss screw machines move the stock. Regular screw machines do not.
The tools do not move in Z - there's no way to crash them into the spindle. There's a small bushing that the stock goes through, and all the tools are arranged around that hole. On the other side of that wall is the spindle and headstock, which provides you Z movement. |
Thank-you I was refering to a conventional cnc lathe; theres the chance of making a mistake either programing or setting an offset wrong and end up with a tool holder going into a spinning chuck; it hasn't happened to me but I have heard of it happening at a shop where I once worked. I can see how a swiss screw machine could be a nice thing to have in a shop.