I've seen several low cost import ultrasonic thickness testers on Ebay. I'm wondering if they could be used to measure engine cylinder wall thickness. They cover the thickness range, but all seem to have flat probe tips. A 3/8" diam. flat probe tip inside a 4" bore would have ~ 0.009" clearance at its mid point, and I'm concerned this might prevent coupling even with glycerin or silicone gel. Anyone have any experience with this situation?
15 years ago