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
25、33112 110 22 19 23,75 2 1,5 30212 110 28 24 29,75 2 1,5 32212 110 38 29 38 2 1,5 33212 130 31 26 33,5 3 2,5 30312 130 31 22 33,5 3 2,5 31312 130 46 37 48,5 3 2,5 32312 130 46 37 48,5 3 2,5 32312 B 65 90 17 14 17 1 1 32913 100 23 17,5 23 1,5 1,5 32013 X 100 27 21 27 1,5 1,5 33013 110 34 26,5 34 1,5 1
26、,5 33113 120 23 20 24,75 2 1,5 30213 120 31 27 32,75 2 1,5 32213 120 41 32 41 2 1,5 33213 140 33 28 36 3 2,5 30313 140 33 23 36 3 2,5 31313 140 48 39 51 3 2,5 32313 140 48 39 51 3 2,5 32313 B DIN 720:2008-08 9 Table 1 (continued) Dimensions in millimetres d D B C T r1s minr2s min r3s minr4s minSymbo
27、la70 100 20 16 20 1 1 32914 110 25 19 25 1,5 1,5 32014 X 110 31 25,5 31 1,5 1,5 33014 120 37 29 37 2 1,5 33114 125 24 21 26,25 2 1,5 30214 125 31 27 33,25 2 1,5 32214 125 41 32 41 2 1,5 33214 150 35 30 38 3 2,5 30314 150 35 25 38 3 2,5 31314 150 51 42 54 3 2,5 32314 150 51 42 54 3 2,5 32314 B 75 105
28、 20 16 20 1 1 32915 115 25 19 25 1,5 1,5 32015 X 115 31 25,5 31 1,5 1,5 33015 125 37 29 37 2 1,5 33115 130 25 22 27,25 2 1,5 30215 130 31 27 33,25 2 1,5 32215 130 41 31 41 2 1,5 33215 160 37 31 40 3 2,5 30315 160 37 26 40 3 2,5 31315 160 55 45 58 3 2,5 32315 160 55 45 58 3 2,5 32315 B 80 110 20 16 2
29、0 1 1 32916 125 29 22 29 1,5 1,5 32016 X 125 36 29,5 36 1,5 1,5 33016 130 37 29 37 2 1,5 33116 140 26 22 28,25 2,5 2 30216 140 33 28 35,25 2,5 2 32216 140 46 35 46 2,5 2 33216 170 39 33 42,5 3 2,5 30316 170 39 27 42,5 3 2,5 31316 170 58 48 61,5 3 2,5 32316 170 58 48 61,5 3 2,5 32316 B 85 120 23 18 2
30、3 1,5 1,5 32917 130 29 22 29 1,5 1,5 32017 X 130 36 29,5 36 1,5 1,5 33017 140 41 32 41 2,5 2 33117 150 28 24 30,5 2,5 2 30217 150 36 30 38,5 2,5 2 32217 150 49 37 49 2,5 2 33217 180 41 34 44,5 4 3 30317 180 41 28 44,5 4 3 31317 180 60 49 63,5 4 3 32317 180 60 49 63,5 4 3 32317 B DIN 720:2008-08 10 T
31、able 1 (continued) Dimensions in millimetres d D B C T r1s minr2s min r3s minr4s minSymbola90 125 23 18 23 1,5 1,5 32918 140 32 24 32 2 1,5 32018 X 140 39 32,5 39 2 1,5 33018 150 45 35 45 2,5 2 33118 160 30 26 32,5 2,5 2 30218 160 40 34 42,5 2,5 2 32218 160 55 42 55 2,5 2 33218 190 43 36 46,5 4 3 30
32、318 190 43 30 46,5 4 3 31318 190 64 53 67,5 4 3 32318 95 130 23 18 23 1,5 1,5 32919 145 32 24 32 2 1,5 32019 X 145 39 32,5 39 2 1,5 33019 160 49 38 49 2,5 2 33119 170 32 27 34,5 3 2,5 30219 170 43 37 45,5 3 2,5 32219 170 58 44 58 3 2,5 33219 200 45 38 49,5 4 3 30319 200 45 32 49,5 4 3 31319 200 67 5
33、5 71,5 4 3 32319 100 140 25 20 25 1,5 1,5 32920 150 32 24 32 2 1,5 32020 X 150 39 32,5 39 2 1,5 33020 165 52 40 52 2,5 2 33120 180 34 29 37 3 2,5 30220 180 46 39 49 3 2,5 32220 180 63 48 63 3 2,5 33220 215 47 39 51,5 4 3 30320 215 51 35 56,5 4 3 31320 X 215 73 60 77,5 4 3 32320 105 145 25 20 25 1,5
34、1,5 32921 160 35 26 35 2,5 2 32021 X 160 43 34 43 2,5 2 33021 175 56 44 56 2,5 2 33121 190 36 30 39 3 2,5 30221 190 50 43 53 3 2,5 32221 190 68 52 68 3 2,5 33221 225 49 41 53,5 4 3 30321 225 53 36 58 4 3 31321 X 225 77 63 81,5 4 3 32321 DIN 720:2008-08 11 Table 1 (continued) Dimensions in millimetre
35、s d D B C T r1s minr2s min r3s minr4s minSymbola110 150 25 20 25 1,5 1,5 32922 170 38 29 38 2,5 2 32022 X 170 47 37 47 2,5 2 33022 180 56 43 56 2,5 2 33122 200 38 32 41 3 2,5 30222 200 53 46 56 3 2,5 32222 240 50 42 54,5 4 3 30322 240 57 38 63 4 3 31322 X 240 80 65 84,5 4 3 32322 120 165 29 23 29 1,
36、5 1,5 32924 180 38 29 38 2,5 2 32024 X 180 48 38 48 2,5 2 33024 200 62 48 62 2,5 2 33124 215 40 34 43,5 3 2,5 30224 215 58 50 61,5 3 2,5 32224 260 55 46 59,5 4 3 30324 260 62 42 68 4 3 31324 X 260 86 69 90,5 4 3 32324 130 180 32 25 32 2 1,5 32926 200 45 34 45 2,5 2 32026 X 200 55 43 55 2,5 2 33026 2
37、30 40 34 43,75 4 3 30226 230 64 54 67,75 4 3 32226 280 58 49 63,75 5 4 30326 280 66 44 72 5 4 31326 X 140 190 32 25 32 2 1,5 32928 210 45 34 45 2,5 2 32028 X 210 56 44 56 2,5 2 33028 250 42 36 45,75 4 3 30228 250 68 58 71,75 4 3 32228 300 62 53 67,75 5 4 30328 300 70 47 77 5 4 31328 X 150 210 38 30
38、38 2,5 2 32930 225 48 36 48 3 2,5 32030 X 225 59 46 59 3 2,5 33030 270 45 38 49 4 3 30230 270 73 60 77 4 3 32230 320 65 55 72 5 4 30330 320 75 50 82 5 4 31330 X 160 220 38 30 38 2,5 2 32932 240 51 38 51 3 2,5 32032 X 290 48 40 52 4 3 30232 290 80 67 84 4 3 32232 340 68 58 75 5 4 30332 DIN 720:2008-0
39、8 12 Table 1 (continued) Dimensions in millimetres d D B C T r1s minr2s min r3s minr4s minSymbola170 230 38 30 38 2,5 2 32934 260 57 43 57 3 2,5 32034 X 310 52 43 57 5 4 30234 310 86 71 91 5 4 32234 360 72 62 80 5 4 30334 180 250 45 34 45 2,5 2 32936 280 64 48 64 3 2,5 32036 X 320 52 43 57 5 4 30236
40、 320 86 71 91 5 4 32236 190 260 45 34 45 2,5 2 32938 290 64 48 64 3 2,5 32038 X 340 55 46 60 5 4 30238 340 92 75 97 5 4 32238 200 280 51 39 51 3 2,5 32940 310 70 53 70 3 2,5 32040 X 360 58 48 64 5 4 30240 360 98 82 104 5 4 32240 220 300 51 39 51 3 2,5 32944 340 76 57 76 4 3 32044 X 240 320 51 39 51
41、3 2,5 32948 360 76 57 76 4 3 32048 X 260 360 63,5 48 63,5 3 2,5 32952 400 87 65 87 5 4 32052 X 280 380 63,5 48 63,5 3 2,5 32956 420 87 65 87 5 4 32056 X 300 420 76 57 76 4 3 32960 460 100 74 100 5 4 32060 X 320 440 76 57 76 4 3 32964 480 100 74 100 5 4 32064 X 340 460 76 57 76 4 3 32968 360 480 76 5
42、7 76 4 3 32972 rs Single radial chamfer dimension. a Code letter X: Bearing dimensions comply with the specifications of ISO 355. The code letter had to be introduced to distinguish bearings conforming to the ISO Standard in full from those which only partly conform to the standard (i.e. the latter
43、are assigned the same bearing symbol, with X“ being, however, omitted). Symbol B: Identifies bearings with a contact angle greater than normal. DIN 720:2008-08 13 4 Material Rollers and rings shall be made from ball and roller bearing steel as in DIN EN ISO 683-17. The material of the cage shall be
44、at the manufacturers discretion or subject to agreement, with due consideration being given to DIN 623-1. 5 Design Tolerances shall be as specified in DIN 620-2. Chamfer dimensions: Maximum values as specified in DIN 620-6. r5 is left unspecified; however, sharp edges are not permitted. The cage des
45、ign shall be at the manufacturers discretion or subject to agreement, with due consideration being given to DIN 623-1. Gauging methods for dimensional and running tolerances shall be as specified in DIN 620-1. Mass: Because cage design and cage material vary depending on the manufacturer, no informa
46、tion on mass is provided. 6 Mounting Since the cage projects beyond the face of the bearing, mating dimensions as specified in DIN 5418 shall be observed. DIN 720:2008-08 14 Annex A (informative) Explanatory notes Except for the symbols, the bearings dealt with in DIN 720 comply with the specificati
47、ons of ISO 355 with respect to their dimensions. Originally it was intended that the symbols as in DIN 720, used in the European market, be replaced by those specified in the ISO Standard, used particularly on the American continent, and that DIN 720 be superseded by DIN ISO 355. After a transitiona
48、l period of twenty years this aim has been found to be unrealistic since the DIN designations are widely established in the European market. For this reason it has been decided not to withdraw the DIN Standard but, instead, to allow it to retain its validity, standing alongside, and with a status equal to that of, the ISO Standard. Bearing manufacturers are thus free to decide which system they wish to use for the designation of their tapered bearings. The list
