This system is designed to machine tensile specimens from round, square, or irregular stock, and it is typically set up with a 3-jaw chuck plus a multi-part clamping approach for repeatable centering and secure holding during machining.
For irregular stock, collets, soft jaws, or pipe-holding style solutions are usually evaluated as part of the workholding configuration, since the best choice depends on your starting shape, wall thickness or hollowness, surface condition, and how much stock you need to remove to clean up and true the bar.
In practice, labs often use custom-profiled soft jaws for non-round shapes, collets for fast, concentric gripping on consistent blanks, and dedicated supports or fixtures when thin-wall tube or short cutoff pieces need extra stability.
If you want to confirm the right workholding configuration for your irregular stock and specimen geometry, please learn more and request a quote.