– Screw Thread Metrology Basics
Ensures dimensional compliance and functionality of threaded parts.
Screw Thread Metrology
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Screw Thread Element Gages
These hand gages measure individual aspects of screw threads, including pitch diameter, effective diameter, major diameter, minor diameter, thread pitch, and drunken thread (variation in pitch).
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Coordinate Measurement Machine (CMM)
A coordinate measuring machine (CMM) provides precise measurement of the dimensions and geometry of physical objects. A probe or sensor detects points on the object’s surface, and the 3D position of each point is recorded. From this point cloud, the object’s features can be mapped in relatively high resolution, and dimensions can be extracted for product design, quality…
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Optical Projector (Optical Comparator)
An optical projector, or optical comparator, projects an enlarged image of a test sample onto a screen which also has a calibrated scale or reticle. Length dimensions and sdrew thread profiles can be measured by directly comparing the projected image to the scale or by using the stage movement to align specific points on the image…
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Fixed Gages
Fixed Gage standards are used to quickly check length dimensions for in-process and final inspection. These include pin gages, drill gages, sheet and wire gages, center gages, screw pitch gages, radius gages, ball and diameter gages, angle gages, thickness gages, and feeler stock.
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Shop Floor Measuring Instruments
Basic handheld or stand-mounted tools used for quick and direct length measurements on the production floor:
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IAC
IAC Geometrical Engineering develops advanced measuring instruments for geometrical metrology, particularly for thread gages.
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Feinmess Suhl GmbH (Steinmeyer)
Feinmess Suhl develops and manufactures precision measuring systems, as well as components such as lead screws, ball screws, actulators, stages, etc.
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VISIONx Inc
VISIONx develops thread inspection tools for automatic, non-contact measurement of the geometric aspects of threads, and imaging/defect inspection on a variety of features and components.
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Thread Check Inc.
Thread Check manufactures thread gauging and inspection equipment, including thread gages, plug and ring gages, and custom-made gages.
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Greenslade & Company
Greenslade & Company provide precision measuring equipment, fastener inspection tools, and calibration services for the bolt, nut, and screw manufacturing industry.
