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Gearheads
How to machine a hole on a lathe?
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<blockquote data-quote="Perplexed" data-source="post: 4138087" data-attributes="member: 7157"><p>I would have bored out the center hole before parting it. A parting tool with enough stick out to part through a mostly intact 4.75” diameter cylinder is going to have so much flex that the parting bits will chatter and break. As for boring it out, it’s kinda wasteful but using a boring bar is the way I would go, bringing it up to the proper ID.</p><p></p><p>And I‘m far from being a professional! <img src="/images/smilies/wink.png" class="smilie" loading="lazy" alt=";)" title="Wink ;)" data-shortname=";)" /></p></blockquote><p></p>
[QUOTE="Perplexed, post: 4138087, member: 7157"] I would have bored out the center hole before parting it. A parting tool with enough stick out to part through a mostly intact 4.75” diameter cylinder is going to have so much flex that the parting bits will chatter and break. As for boring it out, it’s kinda wasteful but using a boring bar is the way I would go, bringing it up to the proper ID. And I‘m far from being a professional! ;) [/QUOTE]
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