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  • BS 870:1950

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    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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    Specification for external micrometers

    Available format(s):  Hardcopy, PDF

    Superseded date:  30-11-2008

    Language(s):  English

    Published date:  09-06-1950

    Publisher:  British Standards Institution

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    Table of Contents - (Show below) - (Hide below)

    Cooperating organizations
    Foreword
    Specification
    Section one. General
    1. Scope
    2. Nomenclature
    Section two. Micrometers
    3. Material
    4. General design of frame
    5. Micrometer screw
    6. Spindle
    7. Thimble and barrel
    8. Adjustments
    9. Measuring faces
    10. Accuracy
    11. Zero setting
    12. Case
    13. Packing
    14. Marking
    Section three: Setting gauges
    15. Material
    16. General design
    17. Accuracy
    18. Packing
    19. Marking
    Appendices
    A. Recommended methods of testing micrometers
    B. Information to be supplied by the purchaser with
         his enquiry
    C. Testing of micrometers

    Abstract - (Show below) - (Hide below)

    External micrometers with fixed anvils having measuring ranges of 0 to ½ in and 0 to 13 mm, and 1 in and 25 mm up to maximum sizes of 24 in and 600 mm respectively. Includes external micrometer with interchangeable anvils for alternative measurement ranges. Material, design of frame, micrometer screw, spindle, thimble and barrel, adjustments, measuring faces, accuracy, packing and marking; setting gauges (material, general design, accuracy); test methods appended.

    General Product Information - (Show below) - (Hide below)

    Committee TPR/1
    Document Type Standard
    Publisher British Standards Institution
    Status Superseded
    Superseded By

    Standards Referenced By This Book - (Show below) - (Hide below)

    BS 1881-206:1986 Testing concrete Recommendations for determination of strain in concrete
    08/30177718 DC : DRAFT JUNE 2008 BS 6468 - SPECIFICATION FOR DEPTH MICROMETERS
    BS 1685:1951 Specification for bevel protractors (mechanical and optical)
    BS 959:1950 Specification for internal micrometers (including stick micrometers)
    BS 2572:1990 Specification for phenolic laminated sheet and epoxy cotton fabric laminated sheet
    BS 7531:1992 Specification for compressed non-asbestos fibre jointing
    BS 7531:2006 Rubber bonded fibre jointing for industrial and aerospace purposes. Specification
    BS 1912:1990 Specification for soap flakes
    BS 2782-3:Method 327A:1993 Methods of testing plastics. Mechanical properties Determination of tensile strength and elongation at break of polytetrafluoroethylene (PTFE) products
    BS 6468:1984 Specification for depth micrometers
    BS 6468:2008 Specification for depth micrometers
    08/30177716 DC : DRAFT JUNE 2008 BS 959 - SPECIFICATION FOR INTERNAL MICROMETERS (INCLUDING STICK MICROMETERS)
    BS 7663:1993 Methods of test for determination of permittivity and dissipation factor of electrical insulating material in sheet or tubular form
    BS 7825-2:1996 Calibration of rubber and plastics test equipment Calibration procedures
    BS 419:1966 Specification for varnished fabrics and tapes for electrical purposes
    06/30144329 DC : DRAFT MAR 2006 BS 7531 - RUBBER BONDED FIBRE JOINTING FOR INDUSTRIAL AND AEROSPACE PURPOSES - SPECIFICATION
    BS 5214-2:1978 Specification for testing machines for rubbers and plastics Constant rate of force application machines
    BS 852:1939 Specification for toolmakers\' straightedges
    BS F 125:1973 Specification for rubber bonded compressed asbestos fibre jointing
    BS 957-1:1941 Specification for feeler gauges Inch units
    BS 1734:1951 Specification for micrometer heads

    Standards Referencing This Book - (Show below) - (Hide below)

    BS 1790:1961 Specification for length bars and their accessories (imperial units)
    BS 959:1950 Specification for internal micrometers (including stick micrometers)
    BS 1685:1951 Specification for bevel protractors (mechanical and optical)
    BS 957-2:1969 Specification for feeler gauges Metric units
    BS 888:1950 Specification for slip (or block) gauges and their accessories
    BS 957-1:1941 Specification for feeler gauges Inch units
    BS 907:1965 Specification for dial gauges for linear measurement
    BS 1054:1954 Engineers comparators for external measurement
    BS 906-2:1972 Specification for engineers\' parallels. Imperial units
    BS 818(1963) : LATEST CAST IRON STRAIGHT EDGES (BOW SHAPED AND I-SECTION)
    BS 939:1962 Specification for engineers\' squares (including cylindrical and block squares)
    BS 817(1939) : LATEST
    BS 906-1:1972 Specification for engineers\' parallels Metric units
    BS 2795:1957 Dial test indicators (lever type) for linear measurement. Metric units.
    BS 852:1939 Specification for toolmakers\' straightedges
    BS 1643:1950 Specification for precision vernier height gauges
    BS 869:1939 Toolmakers\' flats and high precision surface plates.
    BS 863(1939) : LATEST STEEL STRAIGHTEDGES OF RECTANGULAR SECTION
    BS 958:1941 Precision levels for engineering workshops
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