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Rifles, Reloading, Optics, Equipment
Reloading
Interesting results from my new Sinclair concentricity gauge...
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<blockquote data-quote="Trickymissfit" data-source="post: 1102901" data-attributes="member: 25383"><p>1. I do not trust any readings that come off a "long travel gear & rack dial indicator" unless it's a digital read out or jeweled movement. 98% of them are built with 10% lag in them.</p><p> </p><p>2. I also don't like a cradle that has movement (like ball bearings that turn). Yes you can build one that uses ball bearings, and make it work, but the bearings will set you back a hundred bucks or more. Plus the contact area is not good. </p><p> </p><p>3. Even most wand type indicators are in the 2% lag category unless it's one that is capable of rotating 360 degrees. What this means is that when the direction of movement is reversed, you have a little built in error. I use Interrapid's and B&S Best Tests, as they are zero lag. But on the otherhand a Federal .0005" will easily get readings if used correctly.</p><p> </p><p>4. The folks are correct that the gear and rack indicator needs to be 90 degrees from the surface contact. The real issue here is that most indicators come with the wrong tip. You want a ball tip. They make all sorts of tips, and they simply screw on</p><p>gary</p></blockquote><p></p>
[QUOTE="Trickymissfit, post: 1102901, member: 25383"] 1. I do not trust any readings that come off a "long travel gear & rack dial indicator" unless it's a digital read out or jeweled movement. 98% of them are built with 10% lag in them. 2. I also don't like a cradle that has movement (like ball bearings that turn). Yes you can build one that uses ball bearings, and make it work, but the bearings will set you back a hundred bucks or more. Plus the contact area is not good. 3. Even most wand type indicators are in the 2% lag category unless it's one that is capable of rotating 360 degrees. What this means is that when the direction of movement is reversed, you have a little built in error. I use Interrapid's and B&S Best Tests, as they are zero lag. But on the otherhand a Federal .0005" will easily get readings if used correctly. 4. The folks are correct that the gear and rack indicator needs to be 90 degrees from the surface contact. The real issue here is that most indicators come with the wrong tip. You want a ball tip. They make all sorts of tips, and they simply screw on gary [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Interesting results from my new Sinclair concentricity gauge...
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