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Rifles, Reloading, Optics, Equipment
Gunsmithing
Why dial a rifle bore within .0001"
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<blockquote data-quote="shortgrass" data-source="post: 1141649" data-attributes="member: 24284"><p>Flip is correct. You've got that .0001" slack in your spindle bearings, maybe more. Those TR lathes that are capable are beyond the financial reach of all but those with the <em>deepest</em> pockets. The dials on the handles of most tool & cutter grinders, and surface rinders are graduated in .0005. Takes a <em>very</em> controlled environment to even be able to measure below a 1/2 thou accurately/repeatably (temp, humidity, etc. True "gauge rooms" are always in an isolated, climate controlled room). I've worked in the machining industry since 1974,,,,, there's <strong>no</strong> perfect, but, we keep striving for it when doing barrel work.</p></blockquote><p></p>
[QUOTE="shortgrass, post: 1141649, member: 24284"] Flip is correct. You've got that .0001" slack in your spindle bearings, maybe more. Those TR lathes that are capable are beyond the financial reach of all but those with the [I]deepest[/I] pockets. The dials on the handles of most tool & cutter grinders, and surface rinders are graduated in .0005. Takes a [I]very[/I] controlled environment to even be able to measure below a 1/2 thou accurately/repeatably (temp, humidity, etc. True "gauge rooms" are always in an isolated, climate controlled room). I've worked in the machining industry since 1974,,,,, there's [B]no[/B] perfect, but, we keep striving for it when doing barrel work. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Why dial a rifle bore within .0001"
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