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Gearheads
How to machine a hole on a lathe?
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<blockquote data-quote="SlugSlinger" data-source="post: 4138080" data-attributes="member: 7248"><p>I started by facing both ends of this 4.75” diameter by 4.375” long aluminum bar. That went well.</p><p></p><p>The I drilled a hole using progressively larger bits ending with a 1.125” hole. That went ok.</p><p></p><p>Then I tried to part it in half. Things started degrading quick from here. I broke multiple parting blades and ended up cutting it with the bandsaw and re facing the cut ends.</p><p></p><p>I need a 3.5” hole in the center. I bought a .75” boring bar in hopes to bore the hole to size. Is this dumb? Is the a better way to make the hole bigger.</p><p></p><p></p><p>[ATTACH=full]420259[/ATTACH]</p><p></p><p></p><p>[ATTACH=full]420260[/ATTACH]</p><p></p><p>Advice from the professionals on here would be much appreciated!</p></blockquote><p></p>
[QUOTE="SlugSlinger, post: 4138080, member: 7248"] I started by facing both ends of this 4.75” diameter by 4.375” long aluminum bar. That went well. The I drilled a hole using progressively larger bits ending with a 1.125” hole. That went ok. Then I tried to part it in half. Things started degrading quick from here. I broke multiple parting blades and ended up cutting it with the bandsaw and re facing the cut ends. I need a 3.5” hole in the center. I bought a .75” boring bar in hopes to bore the hole to size. Is this dumb? Is the a better way to make the hole bigger. [ATTACH type="full"]420259[/ATTACH] [ATTACH type="full"]420260[/ATTACH] Advice from the professionals on here would be much appreciated! [/QUOTE]
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