Gage Blog
Calibrating Surface Roughness Testers
We're often asked to provide roughness tester standards with non-standard values for calibration of surface roughness testers, also known as profilometers. Most instruments sold by Mahr-Federal, Fowler, Mitutoyo, Phase II, Brown & Sharpe and others include a calibration specimen (typically provided with a NIST traceable certificate) in the 119 Ra microinch range (3 um), which is the industry standard. Set your instrument to this specimen and it is assumed your tester is calibrated properly.
Tapered Pipe Threads
On your docket today in your inspection department one product you must inspect and verify is a part with a Tapered Pipe Thread. Does not sound too tough, but did you know that there are actually three different common Tapered Pipe Threads used in industry today?