I manufacture a 7/16" brass hex nut that has an O-Ring groove inside. The problem is that some parts have a chip stuck in the groove after they come off the machine. We manufacture very large quantities of these a month and visually inspect each piece to see if the o ring groove is clear. I would like to make an inspection machine for this but can't seem to find a sensor that would work (if one even exists). One of the big issues is that the hole the sensor would have to go into is only .240". Any thought or suggestions on this or am I asking to much?
Thanks, Marc Work