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Roughness measurements were carried out in 12 institutes and at 3 contact stylus instrument makers in 9 countries of the EC. The objects to be measured were: one calibration standard, three PTB roughness standards with irregularly ground profiles and four étalons de rugosité LCA with turned profiles. A great variety of measuring equipment was used in the 15 laboratories. The groove depths were measured on the calibration standard. On the roughness standards, the arithmetical mean deviation R(a), the average peak-to-valley height R(z) and the maximum peak-to-valley height R(max) were measured under well-defined conditions of measurement according to DIN 4768, sheet 1. The survey of the 375 measurement results shows that the deviations from the reference values lie within the following ranges: Calibration standard: +- 6.5% PTB roughness standards: +-10% and Etalons de rugosite: +-15% . A detailed analysis of the technical details of the instruments used indicates systematic differences in the measurement of small R(z) values.

Additional information

Authors: CEC, CEC Bruxelles (BE)
Bibliographic Reference: EUR 12244 EN (1990) 541 pp., MF, ECU 24
Availability: (2)
Record Number: 199010150 / Last updated on: 1994-12-01
Original language: en
Available languages: en