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Message: <blockquote data-quote="Ahall" data-source="post: 4138917" data-attributes="member: 49426">Watch your surface feet per minute on larger diameter parts. Boring is probably the practical approach in a home shop.There are special tools made for drilling a core out of a part, but those are typically economical when you're making a pile of parts and can use the cores for something else.  They resemble hole saws and parting tools with a curved blade that matches the core diameter.Like others have said, flip the chuck jaws around and get a deeper grip on the part.Space the part off of the chuck or don't bore all the way through.If your are worried about the jaws deforming the part, not boring through, and facing off the cap at the end is a good approach. With a big hole, you have a lot of leverage to pry the part out of the jaws when cutting. If you have a 6 jaw chuck, that's nicer for thin wall material,Parting - slow cuts, good tool alignment and a blade that is ground to cut straight are all needed.  Don't make parting cuts any deeper than necessary.</blockquote>