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Video instructions and help with filling out and completing Why Form 8815 Employment

Instructions and Help about Why Form 8815 Employment

Howdy tubal-cain again you know one of the perennial problems of a lathe operator our machinist is to keep his tails in alignment so today we're going to show you a little bit different way than what I've shown you before on how to do that we're going to make a test bar similar to this and this is a page out of the South Bend how to run a lathe book and shown here is a bar between centers with enlarged parts here that could be put between centers and turned down and then miked on each end to compare the two and adjustments made until the diameters of the two are the same now I don't know why they're showing calipers on there instead of the micrometer because that's that's not the way we're going to do it at all that just doesn't accurate enough this is the text from below the picture that I just showed you in the last scene so if you want to read that pause your video and read through those two paragraphs some of you may have a test bar and a test bar would be a 10 inch piece of 1 inch stock that is hardened and ground and tested to be perfectly concentric and the dimension the same on both ends this is just a piece of cold rolled steel and this is what we're going to use but this isn't nearly accurate enough now you could in fact I've got Center holes drilled in there already in both ends you could in fact put this between the center's and turn the whole thing down and compare the measurements or a smaller shorter bar but that would be impractical we're going to do it more like the picture I just...

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