CIPM MRA COMPARISON REPORTS

SUPPLEMENTARY COMPARISON

SIM.L-S2.2n01

Gauge Block by Mechanical Comparison
D. Bellelli , C.C. Castellanos , M. Villiesid Alonso , K. Lemessy , A. Rocha , G. Burgos , E. Condor , C. García , P. Suazo , A. Illanes ... , R. Larico , M. Mamani , A. Acquarone , V.H. Gil , D. Plazas , J.L. Galvis , J. Kuruc , W. Barros , L. Rojas , T. Burton , D. Cano , E. Stanfield , T. Alrubah , K. Mohammad
Published on 05/01/2026 - © 2026 D. Bellelli et al
Citation D. Bellelli et al 2026 CIPM MRA Comparison reports 04001

Abstract

The SIM TC for Length decided in June 2019 upon a supplementary comparison on short gauge blocks (GB) (length ≤ 100 mm) calibration by mechanical comparison, named SIM.L-S2.2.n01, with INTI as the pilot laboratory, CENAM as the co-pilot laboratory and NRC as a non-participant viewer. This comparison was carried out to measure deviation of central length, fo and fu of 6 steel gauge blocks by mechanical comparison according to ISO 3650. Fifteen SIM and one GULFMET laboratories participated in the comparison.

Note that this text is that which appears in Appendix B of the BIPM key comparison database https://www.bipm.org/kcdb/.

The final report has been peer-reviewed and approved for publication by the CCL, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).