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Rifles, Reloading, Optics, Equipment
Gunsmithing
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<blockquote data-quote="tobnpr" data-source="post: 3045111" data-attributes="member: 68758"><p>This.</p><p>There's no such thing as a tailstock on an engine lathe that's perfectly aligned radially and axially to the spindle centerline- which is why we use floating holders for most reaming and tapping second ops on a lathe.</p><p></p><p>That said...</p><p>It <em>is</em> possible to use a rigid setup for chamber reaming, so I suppose that concept could be adapted if you were dead-set on doing it for a die holder.</p><p>The reaming setup (seen it, not done it) requires a tooling block that's rigidly attached to the cross-slide, and is bored in-place with a cutter(s) in the headstock/spindle. End result can't be anything but perfectly true to the spindle axis. Using that hole as a holder for your die fixture (assuming the die fixture you fabricate is also true) could yield "acceptable" results I suspect- but it's a s***-ton of work for a one-off.</p><p></p><p>Personally (as I'm missing some change gears for my Sheldon), I'd just get a prefit and be done with it.</p></blockquote><p></p>
[QUOTE="tobnpr, post: 3045111, member: 68758"] This. There's no such thing as a tailstock on an engine lathe that's perfectly aligned radially and axially to the spindle centerline- which is why we use floating holders for most reaming and tapping second ops on a lathe. That said... It [I]is[/I] possible to use a rigid setup for chamber reaming, so I suppose that concept could be adapted if you were dead-set on doing it for a die holder. The reaming setup (seen it, not done it) requires a tooling block that's rigidly attached to the cross-slide, and is bored in-place with a cutter(s) in the headstock/spindle. End result can't be anything but perfectly true to the spindle axis. Using that hole as a holder for your die fixture (assuming the die fixture you fabricate is also true) could yield "acceptable" results I suspect- but it's a s***-ton of work for a one-off. Personally (as I'm missing some change gears for my Sheldon), I'd just get a prefit and be done with it. [/QUOTE]
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