1、BRITISH STANDARD CONFIRMED NOVEMBER1983 BS2007:1975 Specification for Circular gear shaving cutters,1 to8metric module, accuracy requirements UDC 621.914.6:621.833BS2007:1975 This BritishStandard having beenapproved by the MechanicalEngineering IndustryStandards Committee, was published under the au
2、thorityof the Executive Boardon 31October1975 BSI 12-1999 First published August1953 First revision March1959 Second revision October1975 The following BSI references relate to the work on this standard: Committee reference MEE/127 Draft for comment73/32391 DC ISBN 0 580 08594 5 Co-operating organiz
3、ations The Mechanical Engineering Industry Standards Committee, under whose supervision this BritishStandard was prepared, consists of representatives from the following Government departments and professional and industrial organizations: The organizations marked with an asterisk in the above list,
4、 together with the following, were directly represented on the committee entrusted with the preparation of this BritishStandard: Associated Offices Technical Committee Department of Trade Association of Consulting Engineers Electricity Supply Industry in England and Association of Hydraulic Equipmen
5、t Wales Manufacturers Ltd. Engineering Equipment Users Association Association of Mining Electrical and Federation of Manufacturers of Construction Mechanical Engineers Equipment and Cranes British Compressed Air Society Health and Safety Executive (HM Factory British Electrical and Allied Manufactu
6、rers Inspectorate) Association* Institution of Gas Engineers British Gas Corporation Institution of Heating and Ventilating British Gear Manufacturers Association Engineers British Internal Combustion Engine Institution of Mechanical Engineers Manufacturers Association Institution of Production Engi
7、neers* British Mechanical Engineering Confederation London Transport Executive British Pump Manufacturers Association Machine Tool Trades Association British Steel Corporation Ministry of Defence* British Steel Industry National Coal Board Crown Agents for Oversea Governments and Process Plant Assoc
8、iation Administrations Railway Industry Association of Great Britain Department of the Environment Royal Institute of British Architects Department of IndustryMechanical Society of Motor Manufacturers and Engineering TradersLtd. Department of IndustryNational Telecommunication Engineering and Engine
9、ering Laboratory* Manufacturing Association Gauge and Toolmakers Association Navy and Vickers Gearing Research Milling Cutter and Reamers Association Association National Federation of Engineers Tool North East Coast Institution of Engineers and Manufacturers Ship-builders Amendments issued since pu
10、blication Amd. No. Date of issue CommentsBS2007:1975 BSI 12-1999 i Contents Page Co-operating organizations Inside front cover Foreword ii 1 Scope 1 2 References 1 3 Terminology 1 4 Bore diameter 1 5 End faces 1 6 Accuracy requirements 1 7 Marking 1 8 Ordering instructions 1 Figure 1 Gear shaving cu
11、tter 1 Table 1 Accuracy requirements for circular gear 2 Publication referred to Inside back coverBS2007:1975 ii BSI 12-1999 Foreword This BritishStandard has been prepared under the authority of the Mechanical Industry Standards Committee. It is a metricated revision of the1959 edition of BS2007 wh
12、ich this standard supersedes. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of
13、pages This document comprises a front cover, an inside front cover, pagesi andii, pages1 to4, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.B
14、S2007:1975 BSI 12-1999 1 1 Scope This BritishStandard specifies accuracy requirements for serrated circular gear shaving cutters having single or double cutting flanks designed for the production of crowned or uncrowned external and internal gears. It is applicable to new or reground cutters in the
15、range1 to8 normal metric module. It also gives a recommended bore size. 2 References The title of the BritishStandard referred to in this standard is given on the inside back cover. 3 Terminology The general terms used in this standard, common to gears and gear-forming tools, are as given in BS2519
16、1) . 4 Bore diameter The recommended bore size is based on established practice and is63.5mm for cutters of100mm diameter and over. For exceptionally large or small size cutters, the bore diameter shall be agreed between the purchaser and the manufacturer. The bearing length shall be at least30% of
17、the overall width of the cutter. The variation from the design bore diameter over the bearing length, including all departures from roundness and parallelism, shall lie within the following limits: mm for bores not exceeding65mm diameter. 5 End faces Both end faces shall have a datum area to facilit
18、ate measurement and subsequent setting up on the gear shaving machine (seeFigure 1). 6 Accuracy requirements 6.1 Tolerances. Tolerances shall comply with the values given in Table 1, which sets out the tests to be applied. 6.2 Tooth helix and tooth profile. The design tooth helix and tooth profile o
19、f the cutter may be the subject of agreement between the purchaser and the manufacturer. The tolerances for profile in Table 1, test7 apply to cutters used for shaving external-shouldered gears and shall be maintained for the full face width, otherwise the tolerance relates only to the central30% po
20、rtion of the cutter and twice the tolerance is permissible outside this area. NOTEThe tooth helix and tooth profile tolerances in Table 1 are given for guidance only because some cutters will require tolerancing to suit specific requirements. 7 Marking The following information shall be marked on ge
21、ar shaving cutters. For convenience the symbols should be used. The makers identification mark or number, material, lead, base helix angle, crossed axis angle and cutter range may be added if desired. 8 Ordering instructions It is recommended that the purchaser should state: a) the number of this Br
22、itishStandard; b) quantity of cutters required; c) module; d) normal pressure angle of gear at reference cylinder; e) helix angle of cutter; f) hand (right or left) of cutter; g) number of teeth of cutter; h) bore if different from that specified in clause3; i) base circle diameter of cutter: 1) Und
23、er revision. Figure 1 Gear shaving cutter + 0.005 0 a) Normal module of gear x m n b) Normal pressure angle of gear at reference cylinder x n c) Helix angle and hand of cutter x R or L d) Number of teeth of cutter z e) Base circle diameter of cutter xmm d f) Number of this BritishStandard BS2007BS20
24、07:1975 2 BSI 12-1999 Table 1 Accuracy requirements for circular gear shaving cutters 1 2 3 4 5 Test number Typical test arrangement Element Test Tolerances 1 End faces, datum area Flatness and squareness to the bore 0.003mm per25mm, concave only 2 End faces Run-out, measured near periphery of datum
25、 face 0.003mm FIM per25mm of radius 3 Outside diameter (new cutter) Variation from design dimension 4 Tooth thickness (new and reground cutters) Departure from design tooth thickness relative to the outside diameter 5 Tooth helix (seenote to6.2) Departure of any tooth flank from the design form of t
26、he cutter 0.008mm per25mm offace width 6 Tooth helix (seenote to6.2) Total variation in helix between any two flanks 0.005per25mm offacewidth + 0.25 1.00mm + 0.00 0.03mmBS2007:1975 BSI 12-1999 3 Table 1 Accuracy requirements for circular gear shaving cutters 1 2 3 4 5 Test number Typical test arrang
27、ement Element Test Tolerances 7 Tooth profile Departure from the design profile of the cutter when measured in a transverse plane. The direction of departure shall only provide excess metal towards the tip and the root 0.005mm 8 Tooth pitch Adjacent pitch errors 0.005mm 9 Concentricity of tooth spac
28、e with bore. Measurements shall be made by means of a cylinder resting in every tooth space in turn and touching opposing flanks at approximately mid-depth Radial variation in any two adjacent tooth spaces Cuttersu 100mm diameter: 0.005mm For larger diameter cutters: 0.008mm 10 Radial run-out Cutter
29、su 100mm diameter: 0.013mm FIM For larger diameter cutters:0.020mm FIM4 blankBS2007:1975 BSI 12-1999 Publication referred to This standard makes reference to the following BritishStandard: BS2519, Glossary of terms for toothed gearing 2) . 2) Under revision.BS2007:1975 BSI 389 Chiswick High Road Lon
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