Small Bore Surface Roughness Gage Probe
A small bore surface roughness gage probe is meant to measure the surface roughness of a small hole with a minimum inside diameter of 5.0mm and a maximum depth of 15.0mm. Common dimensions: 90° conical diamond stylus with 0.0004″/10μm radius or 90° conical diamond with 0.0002″/5μm radius.