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Obsolete Specifications |
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Tolerances for New Gauge Blocks
BS4311: PART1: 1993 (obsolete)
Metric
| Nominal Length | Tolerances of deviation of measured central length from nominal at 20oC | Maximum associated uncertainty of measurement | Tolerances on variation of measured length | |||||||
| Greater than | Less than or equal to | Grade | ||||||||
| K & 0 | 1 | 2 | K | 0, 1 & 2 | K | 0 | 1 | 2 | ||
| Unit (mm) | Unit 0.001mm (1µm) | |||||||||
| 0 | 10 | ±0.12 | ±0.25 | ±0.50 | ±0.03 | ±0.08 | 0.05 | 0.10 | 0.16 | 0.30 |
| 10 | 25 | ±0.15 | ±0.30 | ±0.60 | ±0.04 | ±0.10 | 0.05 | 0.10 | 0.16 | 0.30 |
| 25 | 50 | ±0.20 | ±0.40 | ±0.80 | ±0.06 | ±0.12 | 0.06 | 0.10 | 0.18 | 0.30 |
| 50 | 75 | ±0.25 | ±0.50 | ±1.00 | ±0.07 | ±0.15 | 0.06 | 0.12 | 0.18 | 0.35 |
| 75 | 100 | ±0.30 | ±0.60 | ±1.20 | ±0.09 | ±0.18 | 0.07 | 0.12 | 0.20 | 0.35 |
| Flatness tolerances for new metric gauge blocks | ||||
| Grade | K | 0 | 1 | 2 |
| Tolerance (µm) | 0.05 | 0.10 | 0.15 | 0.25 |
Inch
| Nominal Length | Tolerances of deviation of measured central length from nominal at 20oC | Maximum associated uncertainty of measurement | Tolerances on variation of measured length | |||||||
| Greater than | Less than or equal to | Grade | ||||||||
| K & 0 | 1 | 2 | K | 0, 1 & 2 | K | 0 | 1 | 2 | ||
| Unit (in) | Unit 0.001 in (1µin) | |||||||||
| 0 | 0.4 | ±5 | ±10 | ±20 | ±1 | ±3 | 2 | 4 | 6 | 12 |
| 0.4 | 1 | ±6 | ±12 | ±25 | ±1.5 | ±4 | 2 | 4 | 6 | 12 |
| 1 | 2 | ±8 | ±15 | ±30 | ±2.5 | ±5 | 3 | 4 | 7 | 12 |
| 2 | 3 | ±10 | ±20 | ±40 | ±3 | ±6 | 3 | 5 | 7 | 14 |
| 3 | 4 | ±12 | ±25 | ±50 | ±3.5 | ±7 | 3 | 5 | 8 | 14 |
| Flatness tolerances for new inch gauge blocks | ||||
| Grade | K | 0 | 1 | 2 |
| Tolerance (µin) | 2 | 3 | 6 | 10 |
Tolerances for New Gauge Blocks
DIN861: PART1: January 1980 (obsolete)
| Nominal Length | Unit = 0.01 µm (0.00001mm) | ||||||||||
| Grade 00 | Grade 0 | Grade 1 | Grade 2 | Calibration Grade K | |||||||
| Over mm |
Up to and including | Permissible deviations from nominal length | Tolerance on variation | Permissible deviations from nominal length | Tolerance on variation | Permissible deviations from nominal length | Tolerance on variation | Permissible deviations from nominal length | Tolerance on variation | Permissible deviations from nominal length | Tolerance on variation |
| - | 10 | ±6 | 5 | ±12 | 10 | ±20 | 16 | ±45 | 30 | ±20 | 5 |
| 10 | 25 | ±7 | 5 | ±14 | 10 | ±30 | 16 | ±60 | 30 | ±30 | 5 |
| 25 | 50 | ±10 | 6 | ±20 | 10 | ±40 | 18 | ±80 | 30 | ±40 | 6 |
| 50 | 75 | ±12 | 6 | ±25 | 12 | ±50 | 18 | ±100 | 35 | ±50 | 6 |
| 75 | 100 | ±14 | 7 | ±30 | 12 | ±60 | 20 | ±120 | 35 | ±60 | 7 |
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Broomfield Carbide Gauges Ltd., Unit 7 Crossley Mills, New Mill Road, Honley, Holmfirth HD9 6PL
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