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  • BS 978-5:1965

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.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 FINE PITCH GEARS - HOBS AND CUTTERS

    Available format(s):  Hardcopy, PDF

    Superseded date:  01-12-2005

    Language(s):  English

    Published date:  01-01-1965

    Publisher:  British Standards Institution

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

    Co-operating organizations
    Foreword
    Specification
    Section 1. Hobs for fine pitch gears
    1.1 Scope
    1.2 Terminology
    1.3 Tooth form
    1.4 Gashes
    1.5 Bores
    1.6 Dimensions
    1.7 Tolerances
    1.8 Marking
    1.9 Purchasing recommendations
    Section 2. Rotary form-relieved gear cutters for fine
               pitch gears
    2.1 Scope
    2.2 Terminology
    2.3 Tooth form
    2.4 Cutter groups
    2.5 Dimensions
    2.6 Tolerances
    2.7 Circumferential form relief
    2.8 Arbor tolerances
    2.9 Marking
    2.10 Purchasing recommendation
    Section 3. Pinion type cutters for fine pitch gears
    3.1 Scope
    3.2 Terminology
    3.3 Tooth form
    3.4 Dimensions
    3.5 Cutting rake
    3.6 Bore
    3.7 Provision of datum cylinder
    3.8 Tolerances
    3.9 Marking
    3.10 Purchasing recommendations
    Appendices
    A Marking code for cutters for fine pitch gears
    B Basic rack tooth profiles (B.S. 978, Part 1)
    C Basic rack tooth profile (gear and cutter) B.S.
          978, Part 2 addendum No. 1
    Tables
    1 General dimensions of hobs
    2 Tolerances
    3 General dimensions of rotary form-relieved cutters
    4 Unit pitch dimensions of cutter profiles for
          involute teeth to Figs. 1 and 2 of B.S. 978, Part
          1
    5 Tolerances
    6 Disc type gear cutter dimensions
    7 Extended hub gear cutter dimensions
    8 Screwed hub gear cutter dimensions
    9 Parallel shank gear cutter dimensions
    10 Taper shank gear cutter dimensions
    11 Tolerances

    Abstract - (Show below) - (Hide below)

    Applies to single-start, topping and non-topping, right and left-hand hobs for production of spur and helical gears in the pitch ranges 24 D.P. to 200 D.P. and 1 mm to 0.127 mm module inclusive. Three grades of hobs are covered, viz. Grade A for production of precision gears, Grade B for gears for high class work and Grade C for general engineering.

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

    Committee MCE/5
    Document Type Standard
    Publisher British Standards Institution
    Status Superseded

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

    BS 4582-2:1978 SPECIFICATION FOR FINE PITCH GEARS (METRIC MODULE) - HOBS AND CUTTERS
    BS 978-1:1968 SPECIFICATION FOR FINE PITCH GEARS - INVOLUTE SPUR AND HELICAL GEARS

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

    BS 2062-1:1959 SPECIFICATION FOR GEAR HOBS - HOBS FOR GENERAL PURPOSES, 1 d.p TO 20 d.p. INCLUSIVE
    BS 2887(1957) : LATEST PINION TYPE CUTTERS FOR SPUR GEARS 4 D.P. TO 20 D.P.
    BS 978-3:1952 SPECIFICATION FOR FINE PITCH GEARS - BEVEL GEARS
    BS 2518-1:1954 SPECIFICATION FOR ROTARY FORM RELIEVED GEAR CUTTERS - DIAMETRAL PITCH
    BS 2518-2:1977 SPECIFICATION FOR ROTARY FORM RELIEVED GEAR CUTTERS - METRIC MODULE
    BS 2519-1(1969) : LATEST
    BS 978-2:1952 SPECIFICATION FOR FINE PITCH GEARS - CYCLOIDAL TYPE GEARS
    BS 2519-2:1976 GLOSSARY FOR GEARS - NOTATION
    BS 978-1:1968 SPECIFICATION FOR FINE PITCH GEARS - INVOLUTE SPUR AND HELICAL GEARS
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