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Rifles, Reloading, Optics, Equipment
Reloading
A great investment.
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<blockquote data-quote="Trickymissfit" data-source="post: 615663" data-attributes="member: 25383"><p>Good post!</p><p> </p><p>But keep this in mind:</p><p> </p><p>Those long travel dial indicators that folks deem so dear, are really not so hot! 98% of at least 10% lag built into them, so when the needle reverses direction you really have no idea what you have. There were some quarter inch travel indicators made years ago that were jeweled, and had a certification of 3% lag. Still not great, but three times better than the other. The digital indicator with a built in encoder is much better, but still suffers from lateral movement of the stem.</p><p> </p><p>Then there is the wand type of dial indicator. This would be something like a Last Word or a Best Test from Browne & Sharp, or an Interrapid. Federal also sells top of the line indicators too. 98% of all dial indicators sold are ment to be stationary, and never moved. If you set it up, and rotate it 180 degrees you lost everything due to lag. The Interrapid and Best Test will allow you to rotate the indicator a full 360 degrees without any lag showing up. As far as I know you can only rotate the B&S and Interrapids. I know you cannot rotate a Federal. Then there is the Blake, and in theory it will rotate, but even without moving it, it will have over five tenths lag built into it. Interestingly the indicators used in a dial bore gauge are in most cases the best quality Federal ever made, and lag will usually be in the 2% range or less, but are also prone to contamination. Pulling the indicator from a junk dial bore gauge is a way to get your hands on a top quality inline indicator, but the travel will be a little short for some folks.</p><p> </p><p>When I did machine alignments, I usually started out with a .0001" dial indicator that had over .150" of travel.It had a known case of lag built into it, but you learn to find the low spot and set it up from there. After getting the axis to within a couple tenths on the indicator I would setup a .0005" Interrapid, and find the actual reading to be closer to seven tenths. After bringing the axis within .00025", I'd setup a one tenth Best Test or Interrapid and bring it down to one tenth. I knew exactly whatkind of error each indicator had in it by checking them against a series of lab grade Jo Blocks. As for how many indicators I own; lets say cigar boxes full of them</p><p>gary</p></blockquote><p></p>
[QUOTE="Trickymissfit, post: 615663, member: 25383"] Good post! But keep this in mind: Those long travel dial indicators that folks deem so dear, are really not so hot! 98% of at least 10% lag built into them, so when the needle reverses direction you really have no idea what you have. There were some quarter inch travel indicators made years ago that were jeweled, and had a certification of 3% lag. Still not great, but three times better than the other. The digital indicator with a built in encoder is much better, but still suffers from lateral movement of the stem. Then there is the wand type of dial indicator. This would be something like a Last Word or a Best Test from Browne & Sharp, or an Interrapid. Federal also sells top of the line indicators too. 98% of all dial indicators sold are ment to be stationary, and never moved. If you set it up, and rotate it 180 degrees you lost everything due to lag. The Interrapid and Best Test will allow you to rotate the indicator a full 360 degrees without any lag showing up. As far as I know you can only rotate the B&S and Interrapids. I know you cannot rotate a Federal. Then there is the Blake, and in theory it will rotate, but even without moving it, it will have over five tenths lag built into it. Interestingly the indicators used in a dial bore gauge are in most cases the best quality Federal ever made, and lag will usually be in the 2% range or less, but are also prone to contamination. Pulling the indicator from a junk dial bore gauge is a way to get your hands on a top quality inline indicator, but the travel will be a little short for some folks. When I did machine alignments, I usually started out with a .0001" dial indicator that had over .150" of travel.It had a known case of lag built into it, but you learn to find the low spot and set it up from there. After getting the axis to within a couple tenths on the indicator I would setup a .0005" Interrapid, and find the actual reading to be closer to seven tenths. After bringing the axis within .00025", I'd setup a one tenth Best Test or Interrapid and bring it down to one tenth. I knew exactly whatkind of error each indicator had in it by checking them against a series of lab grade Jo Blocks. As for how many indicators I own; lets say cigar boxes full of them gary [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
A great investment.
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