1、BRITISH STANDARD BS 4185-1: 1967 Incorporating Amendment Nos. 1 and 2 Specification for Machine tool components Part 1: Locknuts (“C” type, socket set screw locking)BS4185-1:1967 This British Standard, having been approved by the MechanicalEngineering IndustryStandards Committeeand endorsed by theCh
2、airman of the EngineeringDivisional Council,was published under the authority of the GeneralCouncil on 31July1967 BSI 03-2000 The following BSI references relate to the work on this standard: Committee reference MEE/6 Draft for comment D64/14299 ISBN 0 580 34669 2 Co-operating organizations The Mech
3、anical Engineering Industry Standards Committee, under whose supervision this British Standard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations: The Government departments and scientific and industrial organizations marke
4、d with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with the preparation of this British Standard: Associated Offices Technical Committee Institution of Civil Engineers Association of Consulting Engineers Institution of Gas Engineer
5、s Association of Mining Electrical and Institution of Heating and Ventilating Mechanical Engineers Engineers Board of Trade Institution of Mechanical Engineers* British Chemical Plant Manufacturers Institution of Mechanical Engineers Association (Automobile Division) British Compressed Air Society I
6、nstitution of Production Engineers* British Electrical and Allied Manufacturers Locomotive and Allied Manufacturers Association Association of Great Britain British Gear Manufacturers Association London Transport Board British Internal Combustion Engine Machine Tool Trades Association* Manufacturers
7、 Association Ministry of Defence, British Iron and Steel Federation Ministry of Labour (H.M. Factory Inspectorate) British Mechanical Engineering Federation Ministry of Power British Pump Manufacturers Association Ministry of Public Building and Works* Crown Agents for Oversea Governments and Minist
8、ry of Technology National Administrations Engineering Laboratory* Electricity Council, the Central Electricity Ministry of Transport Generating Board and the Area Boards in National Coal Board England and Wales National Physical Laboratory (Ministry of Engineering Equipment Users Association Technol
9、ogy) Gas Council Radio Industry Council Institute of Marine Engineers Royal Institute of British Architects Association of Supervisory Staffs, Executives Production Engineering Research Association and Technicians Society of Motor Manufacturers and Traders Ministry of Defence, Air Force Department l
10、imited Ministry of Defence, Army Department Trades Union Congress Ministry of Defence, Navy Department National Federation of Engineers Tool Manufacturers Amendments issued since publication Amd. No. Date of issue Comments 7 May 1968 1563 September 1974 Indicated by a sideline in the marginBS4185-1:
11、1967 BSI 03-2000 i Contents Page Co-operating organizations Inside front cover Foreword ii 1 Scope 1 2 Materials 1 3 Constructional requirements 1 4 Finish 1 5 Designation 2 6 Marking 2 Figure 1 Lock nut, socket set-screw locking 3 Table 1 Millimetre dimensions of locknuts 4 Table 2 Inch dimensions
12、of locknuts 5BS4185-1:1967 ii BSI 03-2000 Foreword This standard makes reference to the following British Standards: BS 308, Engineering drawing practice. BS 970, Wrought steels in the form of blooms, billets, bars and forgings Part1:Carbon and carbon manganese steels including free cutting steels.
13、BS 1134, Centre-line-average height method for the assessment of surface texture. BS 1580, Unified screw threads. BS 1916, Limits and fits for engineering Part1: Limits and tolerances. BS 2090, Hook spanners, peg spanners, coupling wrenches and the related slots, holes and horns. BS 2470, Hexagon so
14、cket screws and wrench keys. BS 3643, ISO metric screw threads. BS 4168, Hexagon socket screws and wrench keys. Metric series. This standard is based on proposals made by the Machine Tool Trades Association and is one of a series dealing with components of machine tools. Others in this series are: T
15、he locknuts specified in this standard are those secured by a socket set screw. Double locknuts and lock washers are not included in this specification. The slots of both the millimetre and inch series of locknuts are suitable for use with hook spanners conforming to BS2090 1) . That standard gives
16、a series of hook spanner blanks and dimensions of hook spanners which may be made from them for different sizes of nut. Column16 ofTable 1 andTable 2 of this standard gives the number of the hook spanner blank appropriate to each size of locknut; a hook spanner made from this blank to dimensions giv
17、en in BS2090 is suitable for that locknut, whether it is in the millimetre series or the inch. A marking requirement has been included in the standard so that a standard locknut may be distinguished from a special and its size readily identified. A British Standard does not purport to include all th
18、e 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 pages This document comprises a front cover, an inside front cover, pagesi andii, p
19、ages1 to6, 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. Part 2: Collars; Part 3: Rolling bearing end caps and retaining plates; Part 4: Sha
20、ft spacers; in course of preparation. Part: Locknuts for use with tab washers. 1) BS2090, “Hook spanners, peg spanners, coupling wrenches and the related slots, holes and horns”. BS4185-1:1967 BSI 03-2000 1 1 Scope This standard relates to separate millimetre and inch series of locknuts, “C” type, s
21、ocket set screw locking, for use on machine tools and their auxiliary equipment. NOTE“C” type locknuts are those for use with a hook spanner 2)(“C” spanner). The millimetre series is suitable for threaded components of diameter10125mm and the inch series for threaded components of diameter 1 / 2 5in
22、. NOTEAll the millimetre dimensions in this specification relate to the millimetre series and all the inch dimensions to the inch series. 2 Materials The body of the locknut shall be manufactured of steel070M55 (R) conforming to BS970-1 3)or from steel having equivalent mechanical properties. The pa
23、d under the socket set screw shall be manufactured of material selected by the manufacturer of the locknut as suitable for its purpose. It shall be softer than the socket set screw and the threaded member with which the locknut is to be used. Any pellet insert in the socket set screw shall be manufa
24、ctured of material selected by the manufacturer of the socket set screw as suitable for its purpose. 3 Constructional requirements 3.1 Dimensions. Locknuts of the millimetre series shall conform to the dimensions given inFigure 1 andTable 1 and those of the inch series to those inFigure 1 andTable 2
25、. When plating is specified, the locknut shall conform, after plating, to the dimensions given in this standard. 3.2 Locknut body. The tolerance on the angular position of each slot with respect to the thread J shall be 1 . The tolerance on the squareness 4)of the abutment face of the locknut (FaceX
26、, Figure 1) with respect to its thread A shall be as follows: 1) Millimetre series 2) Inch series The screw thread of the bore of the millimetre series of locknuts shall conform to BS3643 5)and shall be Class6H; that of the inch series shall conform to BS1580 6)and be Class2B. The thread of the hole
27、 for the locking screw shall conform to BS3643 5)and shall be Class6H (millimetre series) or to BS1580 6) and be Class2B (inch series). 3.3 Locking screw. The locking screw shall be a hexagon socket set screw with cup point. For the millimetre series, it shall conform to BS4168 7) , Class6g; for the
28、 inch series it shall conform to BS2470 8)(Unified fine thread). The locking screw shall be designed to be self-locking and to be unaffected by vibration. 3.4 Pad. The nominal dimensions of the pad to be interposed between the socket set screw and the thread carrying the locknut are given in Columns
29、14 and15 ofTable 1 andTable 2 but the actual dimensions shall be such that, to prevent loss of the pad before assembly of the locknut on a shaft, the pad is a press fit in the body of the locknut. 4 Finish The abutment face of the locknut (FaceX, Figure 1) shall have a surface texture 9)of0.4m CLA (
30、millimetre series) or 16CLA (inch series). The remainder of the locknut shall have a surface texture of3.2mCLA (millimetre series) or125CLA (inch series). The locknut shall be sound and free from burrs, sharp edges and other defects. 2) BS2090, “Hook spanners, peg spanners, coupling wrenches and the
31、 related slots, holes and horns”. 3) BS970,“Wrought steels in the form of blooms, billets, bars and forgings. Part1. Carbon and carbon manganese steels including free cutting steels.” 4) See BS308, “Engineering drawing practice”. Up to and including 50 mm 0.02 mm Over 50 mm up to and including80mm 0
32、.04 mm Over 80 mm 0.05 mm Up to and including 2 in 0.001 in Over 2 in up to and including3 1 / 4in0.0015 in Over 3 1 / 4in 0.002 in 5) BS3643,“ISO Metric screw threads”. 6) BS1580, “Unified screw threads”. 7) BS4168, “Hexagon socket screws and wrench keys, Metric series”. 8) BS2470, “Hexagon socket
33、screws and wrench keys”. 9) See BS1134, “Centre-line-average height method for the assessment of surface texture.”BS4185-1:1967 2 BSI 03-2000 5 Designation Locknuts conforming to this standard shall be designated by reference to the thread diameter and form and the number of this standard, e.g., loc
34、knuts of nominal diameter20mm and 3 / 4 in shall be designated: This designation shall mean the locknut complete with socket set screw and pad and any insert associated with the socket set screw. 6 Marking Locknuts conforming to this standard shall be marked by the manufacturer with the thread diame
35、ter and form, e.g., locknuts of nominal diameter20mm and 3 / 4 in: NOTESee note on the inside back cover about the BSI Certification Mark Scheme. Locknut M20 1.5 BS 4185-1 Locknut 3 / 4 16 UNF BS 4185-1 M20 1.5 BS 4185-1 3 / 4 16 UNF BS 4185-1BS 4185-1:1967 BSI 03-2000 3 Figure 1 Lock nut, socket se
36、t-screw lockingBS 4185-1:1967 4 BSI 03-2000 Table 1 Millimetre dimensions of locknuts All dimensions in millimetres. (See Figure 1.) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 1 Bore details A Outside diameter B Length C Facing Slots (equispaced see3.2) Socket set screw J a Pad K Hook spanner Nominal bo
37、re Nominal diameter Thread M P Nominal Tolerance h14 b Nominal Tolerance h11 b Diameter D +0.3 0 Length E +0.3 0 Number Width L +0.4 0.1 Depth H +0.3 0 Thread Length Diameter (nom.) Length (nom.) Blank number c 10 M10 1 25 +0 0.52 14 5 M4 0.7 5 3.5 1 10 12 M 12 30 9 +0 0.09 18 12 15 M 15 32 21 15 17
38、 M 17 35 23 2 17 20 M 20 38 +0 0.62 26 4 3.5 20 22 M 22 40 28 M5 0.8 6 4.5 3 22 25 M 25 45 11 33 25 28 M 28 50 35 6.5 3 28 30 M 30 38 30 32 M 32 55 40 1 4 32 35 M 35 +0 0.74 45 35 40 M 40 60 50 8 40 45 M 45 70 55 6 45 50 M 50 75 13 62 M6 1.0 5.2 50 55 M 55 1.5 80 +0 0.11 67 4 7 55 60 M 60 72 60 65 M
39、 65 90 +0 0.87 79 8 65 70 M 70 100 85 70 75 M 75 110 90 6 10 7 9 75 80 M 80 16 95 80 85 M 85 125 103 10 11 85 90 M 90 108 90 95 M95 140 113 M8 1.25 12 95 100 M100 2 +0 1 118 5.5 5 100 105 M105 160 125 1.5 105 110 M110 +0 0.13 130 110 115 M115 19 135 13 15 13 115 120 M120 170 142 120 125 M125 147 125
40、 a See 3.3. b See BS 1916, “Limits and fits for engineering”, Part 1, “Limits and tolerances”. c The hook spanners specified in BS 2090, “Hook spanners, peg spanners, coupling wrenches and the related slots, holes and horns”, may be used with these locknuts. The blank numbers given aid the identific
41、ation of the appropriate spanner.BS 4185-1:1967 BSI 03-2000 5 Table 2 Inch dimensions of locknuts All dimensions in inches. (See Figure 1.) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 1 Bore details A Outside diameter B Length C Facing Slots (equispaced see 3.2) Socket set-screw J a Pad K Hook spanner No
42、minal bore Nominal diameter Thread Nominal Tolerance h14 b Nominal Tolerance h11 b Diameter D + 0.010 0 Length E +0.010 0 Number Width L +0.015 0.005 Depth H +0.010 0 Thread Length Diameter (nom.) Length (nom.) Blank number c 1 / 2 1 / 2 20 UNF 1 1 / 8 +0 0.020 0.750 1 1 / 2 5 / 8 5 / 8 18 UNF 1 1 /
43、 4 3 / 8 +0 0.0035 0.875 3 / 16 2 5 / 8 3 / 4 3 / 4 16 UNF 1 1 / 2 +0 1.000 3 / 4 7 / 8 7 / 8 1 5 / 8 0.025 1.200 4 1 / 8 10 32 UNF 11 / 64 7 / 8 1 1 1 3 / 4 1.400 3 1 1 1 / 8 1 1 / 8 1 7 / 8 1.500 1 / 4 1 / 8 1 1 / 8 1 1 / 4 1 1 / 4 2 7 / 16 1.700 1 / 4 1 1 / 4 1 3 / 8 1 3 / 8 2 1 / 4 1.750 4 1 3 /
44、 8 1 1 / 2 1 1 / 2 2 3 / 8 1.875 1 1 / 2 1 5 / 8 1 5 / 8 2 1 / 2 2.000 1 / 4 28 UNF 5 1 5 / 8 1 3 / 4 1 3 / 4 2 3 / 4 +0 0.030 2.125 1 / 32 5 / 16 15 / 64 1 3 / 4 1 7 / 8 1 7 / 8 2.250 6 1 7 / 8 2 2 3 1 / 2 2.400 5 / 32 2 2 1 / 8 2 1 / 8 3 1 / 8 2.500 2 1 / 8 2 1 / 4 2 1 / 4 3 1 / 4 +0 0.004 2.700 7
45、 2 1 / 4 2 3 / 8 2 3 / 8 3 3 / 8 2.875 2 3 / 8 2 1 / 2 2 1 / 2 16 UN 3 1 / 2 +0 0.035 3.000 2 1 / 2 2 5 / 8 2 5 / 8 3 3 / 4 9 / 16 3.125 3 / 16 8 2 5 / 8 2 3 / 4 2 3 / 4 4 3.250 2 3 / 4 2 7 / 8 2 7 / 8 4 1 / 8 3.500 6 9 2 7 / 8 3 3 4 1 / 4 3.625 3 3 1 / 4 3 1 / 4 4 1 / 2 3.875 5 / 16 24 UNF 3 / 8 9
46、/ 32 3 1 / 4 3 3 / 8 3 3 / 8 4 5 / 8 4.000 3 / 8 10 3 3 / 8 3 1 / 2 3 1 / 2 4 3 / 4 5 / 8 4.125 7 / 32 3 1 / 2 3 3 / 4 3 3 / 4 5 1 / 8 4.375 1 / 16 11 3 3 / 4 4 4 5 1 / 2 +0 0.040 4.625 4 4 1 / 4 4 1 / 4 5 3 / 4 4.875 1 / 4 12 4 1 / 4 4 1 / 2 4 1 / 2 6 +0 0.005 5.250 4 1 / 2 4 3 / 4 4 3 / 4 6 1 / 4
47、3 / 4 5.500 1 / 2 1 / 2 13 4 3 / 4 5 5 6 3 / 4 5.750 5 a See 3.3. b See BS 1916, “Limits and fits for engineering”, Part 1, “Limits and tolerances”. c The hook spanners specified in BS 2090, “Hook spanners, peg spanners, coupling wrenches and the related slots, holes and horns”, may be used with the
48、se locknuts. The blank numbers given aid the identification of the appropriate spanner.6 blankBS4185-1:1967 BSI 03-2000 NOTEThe mark BS 4185 on or in relation to the product is a claim by the manufacturer that it complies with the requirements of the standard. The British Standards Institution is th
49、e owner of a registered certification trade mark. This is shown below, enclosed in the words “Approved to British Standard”. This mark can be used only by manufacturers licensed under the certification mark scheme operated by the BSI. The presence of this mark on or in relation to a product is an assurance that the goods have been produced to comply with the requirements of the British Standard under a system of supervision, control and testing operated during manufacture and
