Surface Roughness Measurement in Deep Hole Drilling
I use a contact profilometer with an extended probe for measuring surface roughness inside deep holes. The probe reaches into the bore and traces the surface profile along a measurement line. Getting a reliable reading in a deep, narrow hole takes the right equipment and a consistent procedure. Equipment for Deep Bore Roughness Measurement A standard profilometer with a short probe arm works fine on shallow, accessible surfaces. Deep holes need extension rods that carry the stylus into the bore. I use a profilometer with modular extension rods in 100 mm, 300 mm, and 500 mm lengths. Anything deeper than 500 mm requires custom extensions, and the accuracy starts to drop off. ...