20.500.12556/DKUM-97158 Experimental determination of influences on a gauge block’s stack length Gauge blocks are an important basis for maintaining traceability in dimensional metrology, used for calibrating length measuring instruments and for adjustments in all branches of manufacturing. Their important feature is that they can be wrung with small dimensional uncertainty. An overview of the factors influencing the accuracy of a stack length, such as the quality of the gauge blocks (grade, wear), surface preparation (cleaning and usage of a lubricant), wringing (way and time, temperature of hands and gloves) is given in the paper. Experiments for determining these influences were performed with a highly precise gauge block comparator. Proper selection of gauge blocks, preparation of their surfaces and oiling improve the accuracy of a stack length. Application of a lubricant, wiped with a dry cloth or paper towel, helps to wring them more easily, but its contribution to the stack length in the experiment was 0.1 µm for oil and 0.2 µm for grease. Temperature changes of gauge blocks were estimated by holding them, and, during wringing in well controlled air conditions, monitoring them to yield the empirical coefficients of their warming up. The results showed that usage of gloves reduces the warming up by approximately half, but still the stack must be stabilised in well controlled conditions for at least one hour if it is used for micrometre-level precise measurements. gauge blocks wringing measurement uncertainty dimensional metrology merilni bloki ožemanje merilna negotovost dimenzijsko meroslovje true false true Chair of Production Engineering (CPE), University of Maribor Faculty of Mechanical Engineering Angleški jezik Slovenski jezik https://apem-journal.org/ Content from this work may be used under the terms of the Creative Commons Attribution 4.0 International Licence (CC BY 4.0). Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Članek v reviji 2026-02-20 11:35:08 2026-02-20 11:35:08 2026-02-21 03:11:39 0000-00-00 00:00:00 2022 0 0 str. 339-349 no. 3 Vol. 17 Sep. 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2022-04-07 2022-09-28 2022-09-30 006.915.1 132896771 10.14743/apem2022.3.440 1854-6250 APEM17-3_339-349.pdf APEM17-3_339-349.pdf 1 57786EDF6A0F96266030BA872F1CE440 79c8ece267a2c28f844e15aa057cb834cd0b38b8d9f651a185730eea0edf11e7 23e2ee35-0e48-11f1-86bb-00155d580e1a https://dk.um.si/Dokument.php?lang=slv&id=203584 https://apem-journal.org/Archives/2022/APEM17-3_339-349.pdf 0 2aeaf7d1-0e48-11f1-86bb-00155d580e1a https://dk.um.si/Dokument.php?lang=slv&id=203585 Fakulteta za strojništvo Advances in production engineering & management 0 0 0