Gripper jaws can be a great way of getting round part movement in roughing operations, this is by use of teeth in the jaw which bite into the material. This biting can also be a great way to get round problems using black bar or other rough material....
Samag MFZ 2-3 five-axis three-spindle horizontal machining centre with Siemens Siematic CNC (to include all product specific work piece holders and tooling, etc.), Serial No. 53153, YoM 2009