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Rifles, Reloading, Optics, Equipment
Gunsmithing
0.001 dial indicator for barrel set up
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<blockquote data-quote="J E Custom" data-source="post: 584146" data-attributes="member: 2736"><p>When I first started building rifles I used .001 indicators and did fine. The trick (Like shortgrass</p><p>said) was to keep the indicator on .000. </p><p></p><p>I finally bought a better lathe and though I needed better instrumentation so I bought a</p><p>last word with .0005 capability and several dials with the same.</p><p></p><p>I found that my lathe would not consistently work within .00001 tolerances and that I </p><p>could stay in the .0001 to .0003 range.</p><p></p><p>The .00001 indicators are very sensitive and will make it easier to read any thing under .0001</p><p>but they dont have much travel so for most work I use the .0005 indicators and the last word</p><p>.00001 on the chambers.</p><p></p><p>The main advantage of the .0005 indicators is ease of seeing the slight run out of the work and </p><p>the Lathe.</p><p></p><p>Most of the factory rifles have a .003 or .004 + or - tolerance and lots of production gunsmiths are </p><p>fine with that also.</p><p></p><p>I have been told by several barrel makers that barrel run out within .007 is fine (Acceptable to </p><p>them). but I wont except any more than .001 to .002 TIR end to end because I feel that the</p><p>heart of any rifle is the barrel and there are barrel makers that can and do build barrels that are </p><p>perfict ( under.00001 TIR).</p><p></p><p>Buy good barrels and stay within 1 or 2 ten thousandths and you will be fine and sometimes the </p><p>build will go perfict (All readings were below .0001) if you keep trying to do better than the last </p><p>rifle on every build.</p><p></p><p>This is where the craftsmanship is important.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 584146, member: 2736"] When I first started building rifles I used .001 indicators and did fine. The trick (Like shortgrass said) was to keep the indicator on .000. I finally bought a better lathe and though I needed better instrumentation so I bought a last word with .0005 capability and several dials with the same. I found that my lathe would not consistently work within .00001 tolerances and that I could stay in the .0001 to .0003 range. The .00001 indicators are very sensitive and will make it easier to read any thing under .0001 but they dont have much travel so for most work I use the .0005 indicators and the last word .00001 on the chambers. The main advantage of the .0005 indicators is ease of seeing the slight run out of the work and the Lathe. Most of the factory rifles have a .003 or .004 + or - tolerance and lots of production gunsmiths are fine with that also. I have been told by several barrel makers that barrel run out within .007 is fine (Acceptable to them). but I wont except any more than .001 to .002 TIR end to end because I feel that the heart of any rifle is the barrel and there are barrel makers that can and do build barrels that are perfict ( under.00001 TIR). Buy good barrels and stay within 1 or 2 ten thousandths and you will be fine and sometimes the build will go perfict (All readings were below .0001) if you keep trying to do better than the last rifle on every build. This is where the craftsmanship is important. J E CUSTOM [/QUOTE]
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0.001 dial indicator for barrel set up
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