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How to machine a hole on a lathe?
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<blockquote data-quote="Shadowrider" data-source="post: 4138088" data-attributes="member: 3099"><p>Boring bar is the only way to make a truly straight hole as drills will always walk some. You can also take small "bites" with a boring bar.</p><p></p><p>Was your part off tool on center and aligned? They have to be perfectly in alignment or things don't go well. And keep overhang as small as possible, only stick out what you need to make the cut.</p><p></p><p>EDIT: [USER=7157]@Perplexed[/USER] nailed it. I didn't realize you were parting before drilling. That's a long ways to part off! Yes, drill and bore first! (before parting off)</p></blockquote><p></p>
[QUOTE="Shadowrider, post: 4138088, member: 3099"] Boring bar is the only way to make a truly straight hole as drills will always walk some. You can also take small "bites" with a boring bar. Was your part off tool on center and aligned? They have to be perfectly in alignment or things don't go well. And keep overhang as small as possible, only stick out what you need to make the cut. EDIT: [USER=7157]@Perplexed[/USER] nailed it. I didn't realize you were parting before drilling. That's a long ways to part off! Yes, drill and bore first! (before parting off) [/QUOTE]
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