Screw Thread Metrology
Screw thread metrology covers the process of inspecting screw and bolt threads to ensure that they meet dimensional and geometric specifications. Critical dimensions include pitch, major and minor diameters, lead, flank, and crest.
Screw Thread Metrology
The diameters, angle, lead, roundness, taper, and straightness of a screw thread all must be consistent and correct in order for the threads to engage properly with the mating surface. Simple gages, such as a go/no-go gage can be used to verify that the threads fall between the minimum and maximum allowable material conditions. Thread gages, micrometers, and calipers can all be used to ensure thread quality as well. In production, vision-based and contact-based systems can provide high-speed verification of thread dimensions.
Recent Surface Metrology Blog Posts
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Skidded vs Skidless Stylus
Reprinted with permission from The Surface Texture Answer Book. Contact surface texture instruments can be skidded or skidless. A skidded instrument uses a probe with…