GSG GeoChek
Model # GC-1

The GeoChek Master is used to calibrate and set circular geometry systems. The master checks for perpendicularity (squareness), Parallelism, Roundness & Concentricity. 
The perfect artifact for making sure your roundness machine or CMM is providing you with reliable measurements. The GSG GeoChek is manufactured to intentionally run out between the ID and OD. GSG then certifies the artifact to state it's exact run out. Once you run the GeoChek on your equipment, you should have findings that match the cert.
Master is supplied with complete certification for roundness, parallelism, perpendicularity and concentricity. 

Supplied with storage box.

For more info on the GSG GeoChek

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