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  • BS 1104:1957

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    Specification for general purpose Acme screw threads

    Available format(s):  Hardcopy, PDF

    Language(s):  English

    Published date:  05-06-1957

    Publisher:  British Standards Institution

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

    Co-operating organizations
    Foreword
    Section 1 - Specification
    1 Scope
    2 Definitions
    3 Basic and design forms of thread
    4 Nominal sizes
    5 Basic diameters
    6 Standard series
    7 Classes of threads
    8 Clearances, allowances, tolerances and limiting
       dimensions
    9 Length of engagement
    10 Chamfers
    11 Special diameters and pitches
    12 Designations
    Section 2 - Gauging of Acme screw threads
    13 Gauges for screws
    14 Gauges for nuts
    15 Concentricity
    16 Lengths of GO screw gauges
    17 Tolerances for gauges
    18 Gauge limits for the standard series of general
       purpose Acme threads
    Appendix A
    Appendix B - Effect of pitch and angle errors on
                 effective diameter

    Abstract - (Show below) - (Hide below)

    Defines Acme thread; tables of basic sizes, limits and tolerances for standard series of single start threads ¼ in to 5 in diameter. Agrees with ASA B1.5:1952 except for pitches associated with diameters ⅜ in, $9G in, 1 in, 1¼ in and 1½ in. 2G, 3G and 4G fits in the American standard included, together with finer class, 5G. Tables of effective diameter tolerances for extended range of diameter/pitch combinations are provided. From these and related tables limiting dimensions for any special diameter/pitch combination for single or multi-start Acme thread can be calculated.

    Scope - (Show below) - (Hide below)

    This British Standard recommends a Standard Series of diameters and associated pitches for General Purpose Acme form screw threads, for the nominal size range ¼ in. to 5 in. and specifies the limiting dimensions, tolerances and allowances for four classes of thread.

    Information is also provided whereby the limiting dimensions for any other screw thread of Acme form may be determined, but the use of these special diameter/pitch combinations should be avoided wherever possible.

    Recommendations are given in Section 2 regarding the types and dimensions of gauges to be used.

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

    Committee FME/9
    Development Note Inactive for the new design. (06/2005)
    Document Type Standard
    Publisher British Standards Institution
    Status Current

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

    BS 4185-10:1977 MACHINE TOOL COMPONENTS - TRAPEZOIDAL THREADS FOR LEAD AND FEED SCREW ASSEMBLIES
    DEFSTAN 40-5/1(1973) : 1973 TURNBUCKLE ASSEMBLIES AND PELICAN HOOKS AND TURNBUCKLE ASSEMBLIES
    BS 5892-1(1992) : 1992 RAILWAY ROLLING STOCK MATERIALS - PART 1: SPECIFICATION FOR AXLES FOR TRACTION AND TRAILING STOCK

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

    BS 2517(1954) : LATEST DEFINITIONS FOR USE IN MECHANICAL ENGINEERING
    BS 350:2004 Conversion factors for units
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