The above represents a comparison of Bobier Metrology Solutions to both NIST and an average of the uncertainties represented by accredited laboratories in the United States. Data was collected using posted “ISO/IEC 17025 Certificates of Accreditation” from three major accreditation bodies.
BOBIER offers several options of ring gage certification:
Option 1: Conformance to Standard NIST (National Institute of Standards and Technology) methodology.
- This method outputs a 0° and 90° deviation from the nominal diameter offered at up to 13 levels from top to bottom.
Option 2: Full Dimetrical Scan and Output of Diameter using Least Squares Circle (LSC) Method
- This method outputs the diameter based on the LSC method of calculation offered at multiple levels, from 1 to 20 from top to bottom.
Option 3: Full Dimetrical Scan and Output of Diameter using Min Fit Circle (smallest achievable diameter) Method.
- This method outputs the diameter as a min fit circle that represents the maximum possible fit of the test unit through the gage. Offered at multiple levels, from 1 to 20 from top to bottom.
**NOTE: Roundness using (LSC) Least Square Circle can be added to any of the above options.
A ring gage certified at BOBIER is measured in our closely controlled laboratory that has double locked doors and is held to a temperature of 68° +/-1° F (20° +/-0.56° C) and 40% Humidity +/-5%, on our high accuracy Leitz PMM654. This machine has been retrofit with 5nm scales. Certified via laser calibration, with accuracy trending tracked for more than 5 years using our 30 year old reference block that validates linear distance, 2d dimetrical and 3d spherical outputs. We are committed to providing the highest grade, most accurate certification possible outside of NIST!