1、June 2009 Translation by DIN-Sprachendienst.English price group 8No 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
2、.060.20!$ig“1709468www.din.deDDIN 981Rolling bearings LocknutsEnglish translation of DIN 981:2009-06Wlzlager NutmutternEnglische bersetzung von DIN 981:2009-06Roulements crous encochesTraduction anglaise de DIN 981:2009-06SupersedesDIN 981:1993-02www.beuth.deDocument comprises pagesIn case of doubt,
3、 the German-language original shall be considered authoritative.12.10 11DIN 981:2009-06 Contents Page Foreword. 3 1 Scope . 4 2 Normative references . 4 3 Symbols . 4 4 Types, designations, dimensions . 4 4.1 General. 4 4.2 Types 5 4.3 Designations . 6 4.4 Dimensions and symbols 6 5 Material and met
4、hod of manufacture 9 6 Design 9 7 Application 10 Annex A (informative) Explanatory notes 11 Bibliography . 12 Figures Figure 1 Dimensions of KM . ., KML . . and HM . . . . T locknuts (notation) 5 Figure 2 Dimensions of HM . . . . locknuts (notation) . 6 Figure 3 Locknut with lockwasher 10 Figure 4 L
5、ocknut with locking clip 10 Tables Table 1 Dimensions and symbols for locknuts KM . . , KML . . and HM . . . . T. 7 Table 2 Dimensions and symbols for locknuts HM . . . 8 2 DIN 981:2009-06 Foreword This standard has been prepared by Working Committee NA 118-01-02 AA Kugellager und Spannlager einschl
6、ielich Teile, allgemeines Wlzlagerzubehr und Gehuse of the Normenausschuss Wlz- und Gleitlager (Rolling Bearings and Plain Bearings Standards Committee). Amendments This standard differs from DIN 981:1993-02 as follows: a) the standard has been completely revised; b) the tolerances for runout and pe
7、rpendicularity (S1 and S2) have been brought into line with ISO 2982-2; c) the symbols have been largely brought into line with ISO 2982-2; d) in Table 1, dimension h has been replaced by A for nuts up to M 100 2; e) the HM . . . . T design has been moved from Table 2 to Table 1 as in ISO 2982-2; f)
8、 further information on the design has been added; g) information on masses has been deleted from Tables 1 and 2; h) the normative references have been updated. Previous editions DIN 981: 1973-01, 1977-05, 1983-01, 1993-02 3 DIN 981:2009-06 1 Scope This standard specifies dimensions and symbols for
9、locknuts. Locknuts according to this standard, in combination with DIN 5406 lockwashers and locking clips, are primarily used for adapter sleeves conforming to DIN 5415. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated refere
10、nces, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. DIN 103-3, ISO metric trapezoidal screw thread Allowances and tolerances for trapezoidal screw threads of general purpose DIN 5406, Rolling bearings Lockwas
11、hers Safety plate, lockclip DIN 5415, Rolling bearings Adapter sleeves DIN ISO 965-1, ISO general purpose metric screw threads Tolerances Part 1: Principles and basic data DIN ISO 13715, Technical drawings Edges of undefined shape Vocabulary and indication on drawings 3 Symbols For the purposes of t
12、his document, the following symbols apply. A Slot bottom spacing B Locknut width b1d2dGh1S2SWidth of slot in locknut External diameter of locknut clamp face External diameter of locknut Designation of screw thread Depth of slot in locknut Runout tolerance of locknut clamp face Perpendicularity toler
13、ance of locknut clamp face 4 Types, designation, dimensions 4.1 General The designs shown are for illustrative purposes only; however, the dimensions of locknuts shall be as specified. The nut thread shall be countersunk on both sides at 90 to 120 to the minor diameter. 4 DIN 981:2009-06 4.2 Types A
14、 distinction is made between the nuts as follows: a) Locknuts for use with lockwashers (see Figures 1 and 3), with at least 4 slots on the casing: KM . . Standard design in the case of nuts with metric thread. KML . . Identical with KM, except that diameters and are reduced. 1d2dHM . . . . T Reinfor
15、ced design compared with KM, and with a trapezoidal thread. b) Locknuts for use with locking clips (see Figures 2 and 4), with at least 8 slots on the casing and associated tapped blind holes: HM . . . . Standard design in the case of nuts with trapezoidal thread. Key aDimensions for assembly tool f
16、or locknuts up to M 100 2 Figure 1 Dimensions of KM . ., KML . . and HM . . . . T locknuts (notation) 5 DIN 981:2009-06 Figure 2 Dimensions of HM . . . . locknuts (notation) 4.3 Designation Designation of a locknut with thread G = M 120 2, d2= 145 mm external diameter and B = 20 mm width (symbol KML
17、 24): Locknut DIN 981 KML 24 Designation of a locknut with thread G = Tr 220 4, d2= 280 mm external diameter and B = 32 mm width (symbol HM 44 T): Locknut DIN 981 HM 44 T Designation of a locknut with thread G = Tr 220 4, d2= 260 mm external diameter and B = 30 mm width (symbol HM 3044): Locknut DIN
18、 981 HM 3044 4.4 Dimensions and symbols Types KM . . , KML . . and HM . . . . T as in Table 1. Type HM . . . . as in Table 2. 6 DIN 981:2009-06 Table 1 Dimensions and symbols for locknuts KM . . , KML . . and HM . . . . T Dimensions in millimetres G2d1dB bh A 1S a Symbol Type of suitable DIN 5406 lo
19、ckwasher M 10 0,75 018 013,5 014 KM 0 MB 0 M 12 1 022 017,0 04 03 018 KM 1 MB 1 M 15 1 025 021,0 021 KM 2 MB 2 M 17 1 028 024,0 05 024 KM 3 MB 3 M 20 1 032 026,0 06 04 028 KM 4 MB 4 M 25 1,5 038 032,0 034 KM 5 MB 5 M 30 1,5 045 038,0 07 041 KM 6 MB 6 M 35 1,5 052 044,0 08 05 (2)048 KM 7 MB 7 M 40 1,
20、5 058 050,0 09 053 KM 8 MB 8 M 45 1,5 065 056,0 10 060 KM 9 MB 9 M 50 1,5 070 061,0 06 (2,5) 065 0,04 KM 10 MB 10 M 55 2 075 067,0 069 KM 11 MB 11 M 60 2 080 073,0 11 074 KM 12 MB 12 M 65 2 085 079,0 07 (3) 079 KM 13 MB 13 M 70 2 092 085,0 12 085 KM 14 MB 14 M 75 2 098 090,0 13 091 KM 15 MB 15 M 80
21、2 105 095,0 15 098 KM 16 MB 16 M 85 2 110 102,0 08 (3,5) 103 KM 17 MB 17 M 90 2 120 108,0 16 112 KM 18 MB 18 M 95 2 125 113,0 17 117 KM 19 MB 19 M 100 2 130 120,0 10 (4) 122 KM 20 MB 20 M 105 2 140 126,0 18 KM 21 MB 21 M 110 2 145 133,0 KM 22 MB 22 M 115 2 150 137,0 19 KM 23 MB 23 M 120 2 145 135,0
22、KML 24 MBL 24 M 120 2 155 138,0 20 12 5 0,05 KM 24 MB 24 M 125 2 160 148,0 KM 25 MB 25 M 130 2 155 145,0 KML 26 MBL 26 M 130 2 165 149,0 21 12 5 KM 26 MB 26 M 135 2 175 160,0 14 6 KM 27 MB 27 M 140 2 165 155,0 12 5 KML 28 MBL 28 M 140 2 180 160,0 22 KM 28 MB 28 M 145 2 190 171,0 6 KM 29 MB 29 M 150
23、2 180 170,0 5 KML 30 MBL 30 M 150 2 195 171,0 24 14 6 KM 30 MB 30 M 155 3 200 182,0 16 7 KM 31 MB 31 M 160 3 190 180,0 14 5 KML 32 MBL 32 M 160 3 210 182,0 25 KM 32 MB 32 M 165 3 210 193,0 7 KM 33 MB 33 M 170 3 200 190,0 5 KML 34 MBL 34 M 170 3 220 193,0 26 7 KM 34 MB 34 M 180 3 210 200,0 16 5 KML 3
24、6 MBL 36 M 180 3 230 203,0 27 18 8 KM 36 MB 36 M 190 3 220 210,0 16 5 KML 38 MBL 38 M 190 3 240 214,0 28 KM 38 MB 38 M 200 3 240 220,0 KML 40 MBL 40 M 200 3 250 226,0 29 18 8 0,06 KM 40 MB 40 7 DIN 981:2009-06 Table 1 (continued) Dimensions in millimetres G2d1dB bh A 1S a Symbol Type of suitable DIN
25、 5406 lockwasher Tr 210 4 270 238 30 HM 42 T Tr 220 4 280 250 32 HM 44 T MB 44 Tr 230 4 290 260 HM 46 T Tr 240 4 300 270 34 HM 48 T MB 48 Tr 250 4 320 290 20 10 HM 50 T Tr 260 4 330 300 36 HM 52 T MB 52 Tr 280 4 350 320 38 24 12 0,12 HM 56 T MB 56 aSlot bottom spacing A for locknuts up to G = M 100
26、2; clip dimension h = design dimension Table 2 Dimensions and symbols for locknuts HM . . . . Dimensions in millimetres G 2d 1d B b h 2S Symbol Type of suitable DIN 5406 locking clip Tr 220 4 260 242 30 09 HM 3044 MS 3044 Tr 240 4 290 270 34 HM 3048 MS 3048 Tr 260 4 310 290 34 20 HM 3052 MS 3048 Tr
27、280 4 330 310 38 10 HM 3056 MS 3056 Tr 300 4 360 336 42 HM 3060 MS 3060 Tr 300 4 380 340 40 HM 3160 MS 3160 Tr 320 5 380 356 HM 3064 MS 3064 Tr 320 5 400 360 42 HM 3164 MS 3164 Tr 340 5 400 376 45 24 12 HM 3068 MS 3064 Tr 340 5 440 400 55 15 HM 3168 MS 3168 Tr 360 5 420 394 45 13 HM 3072 MS 3072 Tr
28、360 5 460 420 58 28 15 0,12 HM 3172 MS 3168 Tr 380 5 450 422 48 28 14 HM 3076 MS 3076 Tr 380 5 490 440 60 32 18 HM 3176 MS 3176 Tr 400 5 470 442 52 28 14 HM 3080 MS 3076 Tr 400 5 520 460 62 18 0,12 HM 3180 MS 3180 Tr 420 5 490 462 52 14 HM 3084 MS 3084 Tr 420 5 540 490 70 18 HM 3184 MS 3180 Tr 440 5
29、 520 490 60 32 15 HM 3088 MS 3088 Tr 440 5 560 510 70 36 20 HM 3188 MS 3188 Tr 460 5 540 510 60 32 15 HM 3092 MS 3088 Tr 460 5 580 540 75 20 HM 3192 MS 3188 Tr 480 5 560 530 60 15 HM 3096 MS 3096 Tr 480 5 620 560 75 20 HM 3196 MS 3196 Tr 500 5 580 550 68 36 15 HM 30/500 MS 3096 Tr 500 5 630 580 80 2
30、3 HM 31/500 MS 31/500 Tr 530 6 630 590 68 20 HM 30/530 MS 30/530 Tr 530 6 670 610 80 23 HM 31/530 MS 31/530 Tr 560 6 650 610 75 40 20 HM 30/560 MS 30/560 Tr 560 6 710 650 85 45 25 HM 31/560 MS 31/560 Tr 600 6 700 660 75 40 20 HM 30/600 MS 30/530 Tr 600 6 750 690 85 25 HM 31/600 MS 31/560 Tr 630 6 73
31、0 690 75 45 20 0,15 HM 30/630 MS 30/630 8 DIN 981:2009-06 Table 2 (continued) Dimensions in millimetres G2d1dB bh 2S Symbol Type of suitable DIN 5406 locking clip Tr 630 6 0800 0730 095 50 28 0,15 HM 31/630 MS 31/630 Tr 670 6 0780 0740 080 45 20 HM 30/670 MS 30/670 Tr 670 6 0850 0775 106 28 HM 31/67
32、0 MS 31/670 Tr 710 7 0830 0780 090 50 25 HM 30/710 MS 30/710 Tr 710 7 0900 0825 106 30 HM 31/710 MS 31/710 Tr 750 7 0870 0820 090 55 25 HM 30/750 MS 30/750 Tr 750 7 0950 0875 112 60 34 HM 31/750 MS 31/750 Tr 800 7 0920 0870 090 55 25 HM 30/800 MS 30/750 Tr 800 7 1000 0925 112 34 HM 31/800 MS 31/750
33、Tr 850 7 0980 0925 090 60 25 HM 30/850 MS 30/850 Tr 850 7 1060 0975 118 70 38 HM 31/850 MS 31/850 Tr 900 7 1030 0975 100 60 25 HM 30/900 MS 30/850 Tr 900 7 1120 1030 125 70 38 HM 31/900 MS 31/900 Tr 950 8 1080 1025 100 60 25 HM 30/950 MS 30/950 Tr 950 8 1170 1080 125 70 38 HM 31/950 MS 31/950 Tr 100
34、0 8 1140 1085 100 60 25 HM 30/1000 MS 30/1000 Tr 1000 8 1240 1140 125 70 38 HM 31/1000 MS 31/1000 Tr 1060 8 1200 1145 100 60 25 HM 30/1060 MS 30/1000 Tr 1060 8 1300 1210 125 70 38 HM 31/1060 MS 31/1000 Tr 1120 8 1260 1205 100 60 25 0,20 HM 30/1120 MS 30/1000 5 Material and method of manufacture Lock
35、nuts shall be made from steel with a minimum tensile strength of 350 N/mm. The method of manufacture shall be at the manufacturers discretion. 6 Design The following tolerances shall apply: a) External diameter of locknut clamp face, d1: Tolerance zone h13. b) External diameter of locknut, d2: Toler
36、ance zone h13.c) Locknut width, B: Tolerance zone h13. d) Width of slot in locknut, b: Tolerance zone JS14. e) Slot bottom spacing, A: Tolerance zone h11. 9 DIN 981:2009-06 f) Depth of slot in locknut, h: Tolerance zone H17. g) Thread, G: Metric fine screw thread as specified in DIN ISO 965-1, toler
37、ance class 6H; Metric trapezoidal screw thread as specified in DIN 103-3, tolerance class 7H. h) Workpiece outer edges: Burrs are not permitted, “(-)” according to DIN ISO 13715. 7 Application Figure 3 Locknut with lockwasher Figure 4 Locknut with locking clip 10 DIN 981:2009-06 Annex A (informative
38、) Explanatory notes This standard is largely based on ISO 2982-2:2001. This standard differs from the above International Standard in the following aspects: a) Tables 1 and 2 of this standard show dimensions and symbols for locknuts. b) The dimensions of locking elements, lockwashers and locking cli
39、ps are given in a separate standard (see DIN 5406). c) The standard also contains specifications for materials and tolerances. d) Figures 3 and 4 show details of mounting lockwashers and locking clips. These figures are not included in ISO 2982-2. 11 DIN 981:2009-06 12 Bibliography ISO 2982-1, Rolling bearings Accessories Part 1: Tapered sleeves Dimensions ISO 2982-2, Rolling bearings Accessories Part 2: Locknuts and locking devices Dimensions
