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1、BRITISH STANDARD AEROSPACE SERIES BS EN 2079:1995 Bearings, precision ball with flange in corrosion resisting steel, for instruments and equipment Dimensions and loads The European Standard EN 2079:1995 has the status of a British Standard Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 02:34
2、:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 2079:1995 This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 April 1995 BSI 01-2000 The following BSI references rel
3、ate to the work on this standard: Committee reference ACE/14 Draft for comment 88/76835 DC ISBN 0 580 23851 2 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee ACE/14, Aerospace details and parts, upon which the following b
4、odies were represented: Civil Aviation Authority Institute of Petroleum Ministry of Defence Society of British Aerospace Companies Ltd. Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 02:34:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI
5、BS EN 2079:1995 BSI 01-2000i Contents Page Committees responsibleInside front cover National forewordii Foreword2 1Scope3 2Normative references3 3Symbols3 4Required characteristics4 5Classification of bores and outside diameters8 6Designation9 7Marking9 8Technical specification9 Figure 14 Figure 25
6、Table 15 Table 26 Table 36 Table 46 Table 56 Table 67 Table 77 Table 87 Table 98 List of referencesInside back cover Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 02:34:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 2079:1995 ii BSI 01-2000 National foreword This British Standard has b
7、een prepared under by Technical Committee ACE/14 and is the English language version of EN 2079:1995 Aerospace series Bearings, precision ball with flange in corrosion resisting steel, for instruments and equipment Dimensions and loads, published by the European Committee for Standardization (CEN).
8、EN 2079:1995 was produced as a result of international discussions in which the United Kingdom took an active part. Cross-references The British Standards corresponding to the International Standards referred to in the text are as follows: There are no British Standards corresponding to EN 2030 and
9、EN 2130 referred to in the text. British Standards identical in title and number will be published in due course. 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 Bri
10、tish Standard does not of itself confer immunity from legal obligations. Publication referred toCorresponding British Standard ISO 15:1981BS 6267:1982 Specification for rolling bearings: boundary dimensions for radical bearings ISO 1132:1980BS 6107 Rolling bearings: tolerances Part 1:1981 Glossary o
11、f terms ISO 1224BS 3469:1985 Specification for instrument precision rolling bearings (ball bearings) Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 10, an inside back cover and a back cover. This standard has been updated
12、(see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 02:34:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2079
13、 February 1995 ICS 49.040.30 Descriptors: Aircraft industry, aircraft instruments, precision bearings, ball bearings, dimensions English version Aerospace series Bearings, precision ball with flange in corrosion resisting steel, for instruments and equipment Dimensions and loads Srie arospatiale Rou
14、lements billes de prcision avec collet en acier rsistant la corrosion pour instruments et quipements Dimensions et charges Luft und Raumfahrt Przisionskugellager mit Flansch aus korrosionsbestndigem Sthl fur Instrumente und Gerte Mae und Belstungen This European Standard was approved by CEN on 1995-
15、02-01. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtain
16、ed on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secret
17、ariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee
18、for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1995 Copyright reserved to CEN members Ref. No. EN 2079:1995 E Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 02:34:16 GMT+00:00 2006, Uncontrolled Copy,
19、 (c) BSI EN 2079:1995 BSI 01-2000 2 Foreword This European Standard has been prepared by the European Association of Aerospace Manufacturers (AECMA). After inquiries and votes carried out in accordance with the rules of this Association, this Standard has successively received the approval of the Na
20、tional Associations and the Official Services of the member countries of ACEMA, prior to its presentation to CEN. This European Standard shall be given the status of a national standard, either by publication of an identical text of by endorsement, at the latest by August 1995, and conflicting natio
21、nal standards shall be withdrawn at the latest by August 1995. According to the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norw
22、ay, Portugal, Spain, Sweden, Switzerland, United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 02:34:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 2079:1995 BSI 01-20003 1 Scope This standard specifies the required characteristics for precision ball bearings in corrosion resisti
23、ng steel: with flange; with radial contact; with deep groove; without filling slot; for use in instruments and aircraft equipment. 2 Normative references This European Standard incorporates by dated or undated reference provisions from other publications. These normative references are cited at the
24、appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the p
25、ublication referred to applies. ISO 15, Rolling bearings Radial bearings Boundary dimensions General plan. ISO 1132, Rolling bearings Tolerances Definitions. ISO 1224, Rolling bearings Instrument precision bearings. EN 2030, Steel FE-PM43 Hardened and tempered Bars D k 150 mm Aerospace series1). EN
26、2130, Aerospace series Precision ball bearings in corrosion resisting steel for instruments and equipment Technical specification2). 3 Symbols The following symbols are in conformity with ISO 1224. Definitions to ISO 1132. 1) Published as AECMA Standard at the date of publication of the present stan
27、dard 2) In preparation at the date of publication of the present standard d:Nominal bore diameter %ds:Deviation of a single bore diameter %dmp:Single plane mean bore diameter variation Vdp:Bore diameter variation in a single radial plane Vdmp:Mean bore diameter variation D:Nominal outside diameter %
28、Ds:Deviation of a single outside diameter %Dmp:Single plane mean outside diameter deviation VDp:Outside diameter variation in a single radial plane VDmp:Mean outside diameter variation D1:Nominal outside diameter of the outer ring flange %D1s:Deviation of a single outside diameter of the outer ring
29、flange B:Nominal width of the rings %Bs:Deviation of a single ring width VBs:Variation in the width of the rings C1:Nominal outer ring flange width %C1s:Deviation of a single outer ring flange width VC1s:Outer ring flange width variation rs min.:Smallest single chamfer dimension rs max.:Largest sing
30、le chamfer dimension Kia:Radial runout of assembled bearing inner ring Kea:Radial runout of assembled bearing outer ring Sd:Face runout with bore Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 02:34:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 2079:1995 4 BSI 01-2000 4 Required character
31、istics 4.1 Materials Rings and balls: steel EN 2030; minimum hardness = 650 HV5 Cage, shields and circlips: corrosion resisting steel Seals: polytetrafluorethylene (PTFE) or PTFE plastic material reinforced with glass fibre 4.2 Dimensions Radial clearance Tolerances Loads Configuration: see Figure 1
32、 and Figure 2; the design and mounting of shields and seals (Figure 2) and the choice of cage design are at the discretion of the manufacturer. Dimensions: see Table 1. Clearances: see Table 2 and Table 3. Tolerances: see Table 4, Table 5, Table 6 and Table 7. Loads: see Table 8. 4.3 Lubrication Est
33、her type grease: code 1 Synthetic oil: code 2 For essential characteristics: see EN 2130 4.4 Surface roughness Closure type See Figure 1 and Figure 2. Sd1:Variation of bore generatrix inclination with face SD:Variation of outside surface generatrix inclination with face Sia:Assembled bearing inner r
34、ing face runout with raceway Sea:Assembled bearing outer ring face runout with raceway Sea1:Assembled bearing outer ring flange back face runout with raceway Figure 1 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 02:34:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 2079:1995 BSI 01-20005
35、Table 1 Figure 2 Dimensions in millimetres CodedDBD1C1rs min.rs max. Series:a nom.nom.nom.nom.nom.radialaxialdiam.dimen. 1541,542,05,00,60,050,100,10838 1551,552,06,50,60,150,300,30919 2052,052,36,10,60,080,160,30838 2062,062,37,50,60,150,300,60919 2562,562,67,10,80,080,160,30838 2572,573,58,50,90,1
36、50,300,60939 3073,073,08,10,80,100,200,40838 3083,084,09,50,90,150,300,60939 3103,0104,011,51,00,150,300,60202 4094,094,010,31,00,100,200,40838 4114,0114,012,51,00,150,300,60919 4134,0135,015,01,00,200,500,80202 5115,0115,012,51,00,150,300,60838 5135,0134,015,01,00,200,500,80919 5165,0165,018,01,00,
37、300,601,00202 6136,0135,015,01,10,150,300,60828 6156,0155,017,01,20,200,500,80919 7147,0145,016,01,10,150,300,60828 8168,0166,018,01,30,200,500,80838 a Series conforming to ISO 15. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 02:34:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 2079:1995
38、 6 BSI 01-2000 4.5 Normal internal radial clearance See Table 2. Table 2 4.6 Reduced internal radial clearance See Table 3. Table 3 4.7 Tolerances group K Shall conform to those of class 5A from ISO 1224. 4.7.1 Inner ring See Table 4. Table 4 NOTEThe tolerance of face runout with bore (Sd) may be ob
39、tained by the approximate formula: where F is the inner ring raceway diameter. F may be indicated by each manufacturer or, when the ball diameter (D2) is known, the following approximate value may be used for F. 4.7.2 Outer ring See Table 5. Table 5 4.8 Tolerances group L Shall conform to those of c
40、lass 4A from ISO 1224. d nominal Clearance m mmGroup AGroup BGroup C 1,5 to 80 to 64 to 1110 to 20 d nominal Clearance m mmGroup DGroup EGroup FGroup GGroup HGroup J 1,5 to 81 to 54 to 87 to 1110 to 1514 to 2018 to 28 d nominal Tolerances m mm%dmp%ds Vdp max. Vdmp max. %Bs VBs max. Kia max. Sd1 max.
41、 Sia max. 1,5 to 8 0 5 0 533 0 2553,577 D nomina l Tolerances m Types MNPQType RBKeaSDSea%D1s%C1sVC1sSea1 mm %Dmp%DsVDp max. VDpm max. %DsVDp max. VDmp max. %BsVBs max.max.max.max.max. 4 to 16 0 5 +1 655 0 533 0 255588 0 25 0 50510 Sd max.Sd1 max. F 2 B2 rs max.() - -= F Dd+ 2 -D2= Licensed Copy: sh
42、effieldun sheffieldun, na, Fri Nov 03 02:34:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 2079:1995 BSI 01-20007 4.8.1 Inner ring See Table 6. Table 6 NOTESee note on 4.7.1. 4.8.2 Outer ring See Table 7. Table 7 4.9 Bearing types, load ratings and mass See Table 8. Table 8 d nominal Tolerances m
43、mm %dmp%dsVdp max. Vdmp max. %BsVBs max. Kia max. Sd1 max. Sia max. 1,5 to 8 0 5 0 52,52,5 0 252,52,533 D nomina l Tolerances m Types MNPQType RBKeaSDSea%D1s%C1sVC1sSea1 mm %Dmp%DsVDp max. VDpm max. %DsVDp max. VDmp max. %BsVBs max.max.max.max.max. 4 to 16 0 5 +1 655 0 52,52,5 0 252,53,545 0 25 0 50
44、2,58 CodeTypes of bearinga Masseb g Dynamic radial load rating min.N Basic static radial load rating N 154R, P, Q0,155522 155R, P, Q0,268836 205R, P, Q0,258836 206R, P, Q0,3912054 256R, P, Q0,4112052 257R, P, Q0,7812062 307R, P, Q0,6018080 308R, P, Q1,10240120 310R, M, N, P, Q1,77300140 409R, M, N,
45、P, Q1,22240120 411R, M, N, P, Q2,04380185 413R, M, N, P, Q3,66540270 511R, M, N, P, Q2,25360180 513R, M, N, P, O2,84450250 516R, M, N, P, Q5,42620340 613R, M, N, P, Q3,26450250 615R, M, N, P, Q4,56620340 714R, M, N, P, Q3,59540270 816R, M, N, P, Q5,53790370 a See Figure 1 and Figure 2. b Approximati
46、ve mass calculated from the following formula: where M = approximate mass and $ = density of material. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 02:34:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 2079:1995 8 BSI 01-2000 5 Classification of bores and outside diameters When required f
47、or selective assembly to shafts and housings, instrument precision rolling bearings may be classified into specific size groups in accordance with the following provisions. 5.1 Classification It shall be carried out prior to assembly of the seals or shields. The bore and outside diameter shall each
48、be classified into two or four groups as shown in Table 9. Table 9 NOTEDue to difficulties in gauge correlation between manufacturer and user, the classifications shall be considered only as guides for selective assembly and not as absolute size segregations in borderline cases. Code numbers and/or
49、letters shall be included in the identity block for this purpose. The classification code for the bore shall always precede that of the outside diameter. Should classification not be required for one of the diameters, code T shall be substituted. If no classification is required, then the code TT shall be used. EXAMPLE 1: EXAMPLE 2: EXAMPLE 3: TT = Bore and outside diameter not classified. 5.2 Method of size deter