I work with a company doing custom rifle chambering. We recently purchased a new machine to increase production and I am looking to upgrade the entire process along with it. I am in need of a solution to measure TIR to an accuracy of at least .00005"- .0001" 3" deep into the rifle bores with an internal diameter as small as .215".
We currently use an Interapid .0005" dial test indicator with a 2.5" stem. Looking to buck the bore to read .0001" TIR with a .0005" indicator with that long of a stem just is not possible. I want to make this process read true. The 2.5" stem also requires us to rough out the ID in order to re-indicate further into the bore where we need to. If I can reach in to about 3" then that would remove most of the need to re-indicate my barrels. When indicating... the indicator lays horizontally, stem inserted into bore, and hand spinning the chuck, measuring off the grooves cut into the bore, so the larger ID diameter. The each groove is cut approximately .003"-.006" larger in radius from the base ID diameter.
I have been unable to find a solution thus far. I had a thought that a dial bore gauge would be the perfect style shape to reach in... however I am unaware of dial bore gauges being able to measure TIR or any similarly shaped instruments that would. If anyone has any clues, I'd love to hear about it. Thank you.
We currently use an Interapid .0005" dial test indicator with a 2.5" stem. Looking to buck the bore to read .0001" TIR with a .0005" indicator with that long of a stem just is not possible. I want to make this process read true. The 2.5" stem also requires us to rough out the ID in order to re-indicate further into the bore where we need to. If I can reach in to about 3" then that would remove most of the need to re-indicate my barrels. When indicating... the indicator lays horizontally, stem inserted into bore, and hand spinning the chuck, measuring off the grooves cut into the bore, so the larger ID diameter. The each groove is cut approximately .003"-.006" larger in radius from the base ID diameter.
I have been unable to find a solution thus far. I had a thought that a dial bore gauge would be the perfect style shape to reach in... however I am unaware of dial bore gauges being able to measure TIR or any similarly shaped instruments that would. If anyone has any clues, I'd love to hear about it. Thank you.