jmorris Posted August 30, 2016 Share Posted August 30, 2016 (edited) There have been a few times I have wished I had a simple little concentricity gauge dedicated to the reloading room for measuring runout in cases and to see how well bullets are being seated, so I built this one today. There is a slot machined into the base plate that the bearing holders ride in with an extra wide slot under that so the nut plate has clearance. This makes it so I just need one Allen wrench from the top to set it up. http://i664.photobucket.com/albums/vv5/qvideo/Concentricity%20Gauge/IMG_20160830_172720_649-1_zps4mp3pmdo.jpg The bearings are .375 and set into the aluminum carriers with Devon, I used a 1/4" stainless rod to mount one of my indicators to and a 1/4" dowel to locate the back of the case. http://i664.photobucket.com/albums/vv5/qvideo/Concentricity%20Gauge/IMG_20160830_172320_213-1_zpsfb6ppb8d.jpg Tested it out on a precision ground dowel and it works but I think I am going to add a spring loaded wheel with and o-ring on the OD to act as a "tire" that holds the case down and back against the dowel and give my fingers something a little larger to turn. http://i664.photobucket.com/albums/vv5/qvideo/Concentricity%20Gauge/IMG_20160830_172403_341-1_zpsgowmrovb.jpg too bad I can't figure out how this format works though... Edited August 30, 2016 by jmorris Link to comment Share on other sites More sharing options...
Matt in TN Posted September 9, 2016 Share Posted September 9, 2016 Very nice! I've threatened to do the same thing for awhile now. Yours is very well executed, and it's clear you put a lot of thought into it. For now I just use a v-block with a stop on the end and a magnetic base for my indicator. Link to comment Share on other sites More sharing options...
Kaldor Posted September 9, 2016 Share Posted September 9, 2016 (edited) Edited September 9, 2016 by Kaldor Link to comment Share on other sites More sharing options...
Kaldor Posted September 9, 2016 Share Posted September 9, 2016 jmorris - for Photobucket links use the tool provided on the side of the picture under "SHARE THIS PHOTO". Click on where is says direct and it shoudl auto copy the URL and then just paste it in the post. The forum software parsed out the pic and posted like above. Works much better than the screwing around I have to do with my Google Pics account Very cool piece of gear though. Link to comment Share on other sites More sharing options...
pmd Posted September 14, 2016 Share Posted September 14, 2016 Looks good.. It's been years since I have used one - I have a Neco like this one http://www.sinclairintl.com/reloading-equipment/measuring-tools/concentricity-gauges/concentricity-gage-prod39500.aspx Link to comment Share on other sites More sharing options...
jmorris Posted September 23, 2016 Author Share Posted September 23, 2016 (edited) I had a little time today and built an H&H style gauge too.http://i664.photobucket.com/albums/vv5/qvideo/Concentricity%20Gauge/IMG_20160923_154146_281-1_zps9oeqpput.jpghttp://i664.photobucket.com/albums/vv5/qvideo/Concentricity%20Gauge/IMG_20160923_154214_857-1_zpsnzuvdlw6.jpg Edited September 23, 2016 by jmorris Link to comment Share on other sites More sharing options...
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