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| | | Mexico, CENAM (Centro Nacional de Metrologia) | | | Complete CMCs in Length for Mexico (.PDF file)
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| Diameter standards. External cylinder (plug): diameter, L, 0.005 m to 0.3 m | | Absolute expanded uncertainty (k = 2, level of confidence 95%) in µm: (0.18 + 0.4L) | | 1-D stylus comparator, gauge substitution | | Approved on 14 June 2004 | | Internal NMI service identifier: CENAM/16 |
| | | Diameter standards. Internal cylinder (ring): diameter L, 0.005 m to 0.205 m | | Absolute expanded uncertainty (k = 2, level of confidence 95%) in µm: (0.18 + 0.4L) | | 1-D stylus comparator, gauge substitution | | Maximal external size diameter: 300 mm | | Approved on 14 June 2004 | | Internal NMI service identifier: CENAM/17 |
| | | Diameter standards. External cylinder (pin or wire): diameter L, 0.1 mm to 5 mm | | Absolute expanded uncertainty (k = 2, level of confidence 95%) in µm: (0.25 + 0.001L) | | 1-D stylus comparator, gauge substitution | | Approved on 14 June 2004 | | Internal NMI service identifier: CENAM/18 |
| | | Diameter standards. Ball or sphere: diameter L, 0.005 m to 0.065 m | | Absolute expanded uncertainty (k = 2, level of confidence 95%) in µm: (0.18 + 0.4L) | | 1-D stylus comparator, gauge substitution | | Approved on 14 June 2004 | | Internal NMI service identifier: CENAM/19 |
| | | Surface texture. Groove or step-height standard: step height, H, 0.03 µm to 10 µm | | Absolute expanded uncertainty (k = 2, level of confidence 95%) in nm: (15 + 2.7H), H in µm, ranges from 15 nm to 42 nm | | 2-D profile stylus instrument | | Approved on 14 June 2004 | | Internal NMI service identifier: CENAM/32 |
| | | Surface texture. Roughness standard: roughness parameter, 0.01 µm to 20 µm | | Absolute expanded uncertainty (k = 2, level of confidence 95%) in nm: (10 + 18P), P in µm, ranges from 10 nm to 370 nm | | 2-D profile stylus instrument | | Roughness parameter P: Ra, Rz, Rmax | | Approved on 14 June 2004 | | Internal NMI service identifier: CENAM/33 |
| | | CMM artefacts. Ball bar: ball spacing L, 10 mm to 1100 mm | | Absolute expanded uncertainty (k = 2, level of confidence 95%) in µm: (0.4 + 0.6E-03L) | | CMM and stylus, with gauge substitution | | Approved on 14 June 2004 | | Internal NMI service identifier: CENAM/36 |
| | | CMM artefacts. Ball and bore plates, L, 10 mm to 650 mm | | Absolute expanded uncertainty (k = 2, level of confidence 95%) in µm: (0.6 + 0.9E-03L) | | CMM and stylus, with gauge substitution and reversal methods | | Approved on 14 June 2004 | | Internal NMI service identifier: CENAM/37 |
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