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Description of BS 5317:1976 1976This British Standard relates to length bars (end standards) of the cylindrical type having flat, parallel end faces finished by lapping in metric sizes up to 1 200 mm.
Provision is made for two designs of length bar, one with complete plane faces and the other with annular faces surrounding an internally threaded hole at one end or both ends of the bar. Section 2 provides for length bars in four grades of accuracy, namely reference, calibration, grade 1 and grade 2. It gives general dimensions, tolerances on length and requirements for flatness, parallelism and squareness of faces for all grades of bars. Manufacturers supply single length bars or sets of selected sizes. Section 3 relates to the essential features of design and accuracy of accessories for use with grade 1 or grade 2 bars. Appendix A deals with interchangeability between these bars and bars made in accordance with BS 1790. Cylindrical length bars up to 1200 mm. Accuracy standards for 4 grades, reference, calibration, 1 and 2, and details of screwed connections. Essential features of design and accuracy for accessories commonly used with Grade 2 bars.
About BSIBSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses. |
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