DIN 720-2008 Rolling Bearings - Tapered roller bearings《滚动轴承 锥形滚柱轴承》.pdf
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1、August 2008 English price group 10No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 21.100.20!$|YY“1895454www.din.deD
2、DIN 720Rolling bearings Tapered roller bearings,English translation of DIN 720:2008-08Wlzlager Kegelrollenlager,Englische bersetzung von DIN 720:2008-08Roulements Roulements galets cniques,Traduction anglaise de DIN 720:2008-08SupersedesDIN 720:1979-02www.beuth.deDocument comprises 14 pagesTranslati
3、on by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.07.12 DIN 720:2008-08 2 A comma is used as the decimal marker. Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Type, designation, dimensions 5 3.1 General 5 3.2 Type .5 3.3 Designa
4、tion 5 3.4 Dimensions and symbols .5 4 Material 13 5 Design 13 6 Mounting 13 Annex A (informative) Explanatory notes 14 Bibliography . 14 Figures Figure 1 Single row tapered roller bearing 5 Tables Table 1 Dimensions, symbols .6 DIN 720:2008-08 3 Foreword This standard has been prepared by Working C
5、ommittee NA 118-01-09 AA Kegelrollenlager und Pendelrollenlager einschlielich Teile of the Normenausschuss Wlz- und Gleitlager (Rolling Bearings and Plain Bearings Standards Committee). Amendments This standard differs from DIN 720:1979-02 as follows: a) the standard has been completely revised; b)
6、information on the mass is no longer included in Table 1; c) normative references have been updated; d) Annex A has been revised. Previous editions DIN 720: 1933-11, 1936-09, 1939-12, 1959-09, 1965-04, 1970-08, 1979-02 DIN 720-1: 1942-08 DIN 720-2: 1940-07, 1942-08 DIN 720-3: 1940-07 DIN 720:2008-08
7、 4 1 Scope This standard specifies dimensions and symbols for single row metric tapered roller bearings, the main dimensions of which have been taken from ISO 355. Since only these dimensions conform to the general plan as in DIN 616 and the symbols specified in the DIN Standard differ from those gi
8、ven in the International Standard, the present standard, DIN 720, has been retained and is to be used in conjunction with ISO 335. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. F
9、or undated references, the latest edition of the referenced document (including any amendments) applies. DIN 616, Rolling bearings Dimensions General plan DIN 620-1, Rolling bearings Gauging methods for dimensional and running tolerances DIN 620-2, Rolling bearings Tolerances for rolling bearings To
10、lerances for radial bearings DIN 620-6, Rolling bearings Rolling bearing tolerances Part 6: Chamfer dimension limits DIN 623-1, Rolling bearings Fundamental principles Designation, marking DIN 5418, Rolling bearings Mounting dimensions DIN EN ISO 683-17, Heat treated steels, alloy steels and free-cu
11、tting steels Part 17: Ball and roller bearing steels ISO 355, Rolling bearings Tapered roller bearings Boundary dimensions and series designations DIN 720:2008-08 5 3 Type, designation, dimensions 3.1 General The designs shown are for illustrative purposes only; however, the dimensions of single row
12、 tapered roller bearings shall be as specified. Details of the inner design are not standardized. The symbols used shall comply with DIN 623-1. 3.2 Type See Figure 1. aChamfer dimension r5not specified (cf. clause 5). Figure 1 Single row tapered roller bearing 3.3 Designation Designation of a single
13、 row tapered roller bearing of dimension series 31, with a bore diameter d = 65 mm, external diameter D = 110 mm and width T = 34 mm (denoted by symbol 33113), tolerance class PN, cage at the manufacturers discretion: Tapered roller bearing DIN 720 33113 3.4 Dimensions and symbols See Table 1 for di
14、mensions and symbols. DIN 720:2008-08 6 Table 1 Dimensions, symbols Dimensions in millimetres d D B C T r1s minr2s min r3s minr4s minSymbola15 42 13 11 14,25 1 1 30302 42 17 14 18,25 1 1 32302 17 40 12 11 13,25 1 1 30203 40 16 14 17,25 1 1 32203 47 14 12 15,25 1 1 30303 47 19 16 20,25 1 1 32303 20 3
15、7 12 9 12 0,3 0,3 32904 42 15 12 15 0,6 0,6 32004 X 47 14 12 15,25 1 1 30204 47 18 15 19,25 1 1 32204 47 18 15 19,25 1 1 32204 B 52 15 13 16,25 1,5 1,5 30304 52 21 18 22,25 1,5 1,5 32304 22 40 12 9 12 0,3 0,3 329/22 44 15 11,5 15 0,6 0,6 320/22 X 25 42 12 9 12 0,3 0,3 32905 47 15 11,5 15 0,6 0,6 320
16、05 X 47 17 14 17 0,6 0,6 33005 52 15 13 16,25 1 1 30205 52 18 16 19,25 1 1 32205 52 18 15 19,25 1 1 32205 B 52 22 18 22 1 1 33205 62 17 15 18,25 1,5 1,5 30305 62 17 13 18,25 1,5 1,5 31305 62 24 20 25,25 1,5 1,5 32305 28 45 12 9 12 0,3 0,3 329/28 52 16 12 16 1 1 320/28 X 58 19 16 20,25 1 1 322/28 B 5
17、8 24 19 24 1 1 332/28 30 47 12 9 12 0,3 0,3 32906 55 17 13 17 1 1 32006 X 55 20 16 20 1 1 33006 62 16 14 17,25 1 1 30206 62 20 17 21,25 1 1 32206 62 20 17 21,25 1 1 32206 B 62 25 19,5 25 1 1 33206 72 19 16 20,75 1,5 1,5 30306 72 19 14 20,75 1,5 1,5 31306 72 27 23 28,75 1,5 1,5 32306 72 27 23 28,75 1
18、,5 1,5 32306 B DIN 720:2008-08 7 Table 1 (continued) Dimensions in millimetres d D B C T r1s minr2s min r3s minr4s minSymbola32 52 15 10 14 0,6 0,6 329/32 58 17 13 17 1 1 320/32 X 65 17 15 18,25 1 1 302/32 65 21,5 17 22 1 1 322/32 B 65 26 20,5 26 1 1 332/32 75 28 23 29,75 1,5 1,5 323/32 B 35 55 14 1
19、1,5 14 0,6 0,6 32907 62 18 14 18 1 1 32007 X 62 21 17 21 1 1 33007 72 17 15 18,25 1,5 1,5 30207 72 23 19 24,25 1,5 1,5 32207 72 23 19 24,25 1,5 1,5 32207 B 72 28 22 28 1,5 1,5 33207 80 21 18 22,75 2 1,5 30307 80 21 15 22,75 2 1,5 31307 80 31 25 32,75 2 1,5 32307 80 31 25 32,75 2 1,5 32307 B 40 62 15
20、 12 15 0,6 0,6 32908 68 19 14,5 19 1 1 32008 X 68 22 18 22 1 1 33008 75 26 20,5 26 1,5 1,5 33108 80 18 16 19,75 1,5 1,5 30208 80 23 19 24,75 1,5 1,5 32208 80 23 19 24,75 1,5 1,5 32208 B 80 32 25 32 1,5 1,5 33208 90 23 20 25,25 2 1,5 30308 90 23 17 25,25 2 1,5 31308 90 33 27 35,25 2 1,5 32308 90 33 2
21、7 35,25 2 1,5 32308 B 45 68 15 12 15 0,6 0,6 32909 75 20 15,5 20 1 1 32009 X 75 24 19 24 1 1 33009 80 26 20,5 26 1,5 1,5 33109 85 19 16 20,75 1,5 1,5 30209 85 23 19 24,75 1,5 1,5 32209 85 23 19 24,75 1,5 1,5 32209 B 85 32 25 32 1,5 1,5 33209 100 25 22 27,25 2 1,5 30309 100 25 18 27,25 2 1,5 31309 10
22、0 36 30 38,25 2 1,5 32309 100 36 30 38,25 2 1,5 32309 B DIN 720:2008-08 8 Table 1 (continued) Dimensions in millimetres d D B C T r1s minr2s min r3s minr4s minSymbola50 72 15 12 15 0,6 0,6 32910 80 20 15,5 20 1 1 32010 X 80 24 19 24 1 1 33010 85 26 20 26 1,5 1,5 33110 90 20 17 21,75 1,5 1,5 30210 90
23、 23 19 24,75 1,5 1,5 32210 90 23 19 24,75 1,5 1,5 32210 B 90 32 24,5 32 1,5 1,5 33210 110 27 23 29,25 2,5 2 30310 110 27 19 29,25 2,5 2 31310 110 40 33 42,25 2,5 2 32310 110 40 33 42,25 2,5 2 32310 B 55 80 17 14 17 1 1 32911 90 23 17,5 23 1,5 1,5 32011 X 90 27 21 27 1,5 1,5 33011 95 30 23 30 1,5 1,5
24、 33111 100 21 18 22,75 2 1,5 30211 100 25 21 26,75 2 1,5 32211 100 35 27 35 2 1,5 33211 120 29 25 31,5 2,5 2 30311 120 29 21 31,5 2,5 2 31311 120 43 35 45,5 2,5 2 32311 120 43 35 45,5 2,5 2 32311 B 60 85 17 14 17 1 1 32912 95 23 17,5 23 1,5 1,5 32012 X 95 27 21 27 1,5 1,5 33012 100 30 23 30 1,5 1,5
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