1、DEUTSCHE NORM Julv 1999 Spherical plain bearings Part 4: Spherical plain bearing rod ends (IS0 12240-4 : 1998) ICs 21.080 Gelenklager - Teil 4: Gelenkkpfe (IS0 12240-4 : 1998) This standard, together with edition, supersedes DIN 648, August 1987 edition. DIN IS0 12240-1, July 1999 This standard inco
2、rporates International Standard IS0 12240-4 Spherical plain bearings - Part 4: Spherical plain bearing rod ends. A comma is used as the decimal marker. National foreword This standard has been prepared by ISO/TC 4. The responsible German body involved in its preparation was the Technical Committee W
3、alzlager. The DIN Standards corresponding to the International Standards referred to in clause 2 of the IS0 Standard are as follows: IS0 Standard DIN Standard IS0 965-1 DIN 13-14 and DIN 13-15 IS0 1132 DIN IS0 1132 IS0 681 1 DIN IS0 6811 IS0 582 DIN 620-6 IS0 12240-1 DIN IS0 12240-1 Amendments DIN 6
4、48, August 1987 edition, has been superseded by the specifications of DIN IS0 12240-1 and DIN IS0 12240-4. Previous editions DIN 648: 1972-01. 1987-08. National Annex NA Standards referred to (and not included in Normative references) DIN 13-14 DIN 13-15 DIN 620-6 DIN IS0 12240-1 IS0 metric screw th
5、reads - Tolerance system for threads 1 mm in diameter and larger IS0 metric screw threads - Fundamental deviations and tolerances for screw threads of 1 mm diameter and larger Chamfer dimension limits for rolling bearings Spherical plain bearings - Part 1: Radial spherical plain bearings (IS0 12240-
6、1 : 1998) IS0 Standard comprises 12 pages. No pari of this standard may be reproduced without the prior permission of Ref. No. DIN IS0 12240-4 : 1999-0 Y Deutsches Institut fr Normung e. V., Berlin. wth Verlag GmbH, D-10772 Berlin, has the exclusive right of sale for German Standards (DIN-Normen). E
7、nglish price group O9 Sales No. 0409 12.99 Page 1 IS0 12240-4 : 1998 Spherical plain bearings Part 4: Spherical plain bearing rod ends Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standard bodies (IS0 member bodies). The work of preparing In
8、ternational Standards is normally carried out through IS0 technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that Committee. International organizations, governmental and non-governmental, in liaison
9、with ISO, also take part in the work. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as
10、 an International Standard requires approval by at least 75 YO of the member bodies casting a vote. International Standard IS0 12240-4 was prepared by Technical Committee ISO/TC 4, Rolling bearings, Subcommittee SC 7, Spherical plain bearings. This first edition cancels and replaces IS0 6126:1987 of
11、 which it constitutes a technical revision. IS0 12240 consists of the following parts, under the general title Spherical plain bearings: - Part I: Radial spherical plain bearings - Part 2: Angular contact radial spherical plain bearings - Part 3: Thrust spherical plain bearings - Part 4: Spherical p
12、lain bearing rod ends Page 2 IS0 12240-4 : 1998 1 Scope This part of IS0 12240 specifies dimensions, tolerances and radial internal clearances for various dimension series of spherical plain bearing rod ends. The dimensions and tolerances specified in this part of IS0 12240 have been selected to per
13、mit the design and use of spherical plain bearing rod ends which incorporate radial spherical plain bearings having various sliding material combinations. The specified tolerance values apply for finished spherical plain bearing rod ends before any coating, plating, ring splitting or fracturing. Sph
14、erical plain bearing rod ends need not conform to the designs illustrated but compliance is required as regards dimensions, tolerances and radial internal clearances specified. NOTE - Spherical plain bearing rod ends for airframe applications and specific spherical plain baring rod ends for direct c
15、onnection to hydraulic cylinders are not covered by this part of IS0 12240. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of IS0 12240. At the time of publication, the editions indicated were valid. All sta
16、ndards are subject to revision, and parties to agreements based on this part of IS0 12240 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. IS0 582
17、:1995, Rolling bearings - Chamfer dimensions - Maximum values. IS0 965-1: 1992, IS0 general purpose metric screw threads - Tolerances - Part 1: Principles and basic data. IS0 11 32-1: -I), Rolling bearings - Tolerances - Part 1: Terms and definitions. IS0 681 1 : 1998, Spherical plain bearings - Voc
18、abulary. IS0 12240-1:1998, Spherical plain bearings - Part I: Radial spherical plain bearings. 1) To be published. (Revision of IS0 1132:1980) Page 3 IS0 12240-4 : 1998 3 Definitions and symbols For the purposes of this part of IS0 12240, the definitions given in IS0 1132-1 and IS0 6811 apply. The s
19、ymbols (except those for tolerances) shown in the figures and the values given in the tables denote nominal dimensions unless specified otherwise. Inner ring width Outer ring width Width of rod end eye Outside diameter of bearing outer ring Bore diameter of inner ring Outside diameter of inner ring
20、face Outside diameter of rod end eye Rod end shank diameter Rod end shank shoulder diameter Rod end shank diameter with welding end Centre pin diameter Sphere diameter Diameter of thread Centre height of rod end Thread length Overall length of rod end Length of shoulder on rod end shank Length of th
21、e flat surface from the bearing bore centre to the shank Length of the locating pin Smallest single chamfer dimension, inner ring Smallest single chamfer dimension, outer ring Variation of mean bore diameter Variation of bore diameter in a single radial plane Width across flats Angle of tilt Deviati
22、on of a cingle inner ring width Admp Deviation of mean bore diameter in a single plane 2) The corresponding maximum chamfer dimensions are given in table 1 of IS0 582:1995. Page 4 IS0 12240-4 : 1998 4 Dimension series for spherical plain bearing rod ends A distinction is made between two basic dimen
23、sion series in the case of spherical plain bearing rod ends. Dimension series E and G have been designed so as to permit the insertion of dimension series E or G radial spherical plain bearings into the cylindrical bore of a rod end eye. In dimension series E and G a distinction is also made between
24、 different spherical plain bearing rod end types according to the shank design, .e. external or internal thread, normal or strengthened form, or welding end type. Dimension series K has been designed so as to permit the insertion of dimension series K radial spherical plain bearings into the cylindr
25、ical or sphered bore of a rod end eye. In dimension series K a distinction is made between different spherical plain bearing rod end types according to the shank design, .e. external or internal thread. A choice of sliding material combination is provided for a two piece (integral design, see figure
26、 5) spherical plain bearing rod end. 5 Angles of tilt a The specified angles of tilt (approximate values) represent the angles by which the axes of the inner ring and of the outer ring may be inclined in relation to each other without reducing the projected theoretical contact area of the two bearin
27、g rings when the two ring axes are parallel to each other. NOTE- Attention is drawn to the fact that after mounting a spherical plain bearing rod end on a shaft, the angle through which the rod end can tilt may be restricted by the design of the adjacent components. 6 Dimensions, tolerances and radi
28、al internal clearances 6.1 Dimensions See figures 1 to 6 and tables 1 to 5. The position of the lubricating nipple may vary according to the size of the spherical plain bearing rod end. In case of type B, the lubricating nipple may be positioned at the shank. The position and size of the lubricating
29、 nipple shall be the subject of agreement. Type and design of lubricating nipple at manufacturers discretion. t- d2 i Figure 1 - Spherical plain bearing rod end with external thread type M Page 5 IS0 12240-4 : 1998 1) Values for widths across flats are not specified in this part of IC0 12240. 2) See
30、 figure 6. Figure 2 - Spherical plain bearing rod end with internal thread type F Figure 4 - Spherical plain bearing rod end with mounted spherical plain radial bearing (cartridge design) Figure 5 - Spherical plain bearing rod end with inner ring only (integral design) 3) f a a ig=6mm Figure 3 - Sph
31、erical plain bearing rod end with welding shank type S Figure 6 - Spherical plain radial bearing in accordance with IS0 12240-1 3) This design can apply for types M and F of the K-series. Page 6 IS0 12240-4 : 1998 Table 1 - Spherical plain bearing rod ends, dimension series E Page 7 IS0 12240-4 : 19
32、98 Table 2 - Spherical plain bearing rod ends, according to dimension series E, with strengthened shank, dimension series EH + Page 8 IS0 12240-4 : 1998 Table 3 - Spherical plain bearing rod ends, dimension series G Page 9 IS0 12240-4 : 1998 Table 4 - Spherical plain bearing rod ends, according to d
33、imension series G, with strengthened shank, dimension series GH E rn In 00 cc LL 22 aal KCr irN AA Page 1 O IS0 12240-4 : 1998 Table 5 - Spherical plain bearing rod ends, dimension series K L O i O m o .- * .- L n a L ,o - L C O u .- .- a D r O K v) (u O -0 U C a U o C m W c 0 .- L n Page 11 IS0 122
34、40-4 : 1998 VdP max. 6.2 Tolerances See table 6. Vdmp max. d mm ding j, EH, G, GH K Fm Pm Table 6 - Tolerances, dimension series E, EH, G, GH, K E, EH, G, GH K Pm Pm Admp high low O - 8 O - 8 O - 8 O - 8 o -10 O -12 O -15 high low +IO O +I2 O +I5 O +I8 O +21 o +25 O +30 O 1) Threads may be right-han
35、d or left-hand. 18 6 14 I I I 10 21 8 16 G 1) i accordanc with IS0 965-1 Type 6H 6H 6H E, EH, G, GH, K Pm +1 200 +I 200 +I 200 tl 200 i1 700 z2 100 12 700 I, EH, G, GH, K wm high 1 low 6.3 Radial internal clearance Radial internal clearance is the arithmetical mean of the radial distances through wh
36、ich one of the rings may be displaced relative to the other, from one eccentric extreme position to the diametrically opposite extreme position. In case of spherical plain bearing rod ends with split outer ring these values may deviate slightly. 6.3.1 Spherical plain bearing rod ends with sliding co
37、ntact surfaces: steehteel See tables 7, 8 and 9. Table 7 - Radial internal clearance, dimension series E, EH d Group 2 Group N Group 3 mm Page 12 IS0 12240-4 : 1998 mm over including 23 10 10 17 17 30 30 50 50 70 Table 8 - Radial internal clearance, dimension series G, GH Prn Pm min. max. min. max.
38、4 32 16 68 5 40 20 82 6 50 25 1 O0 8 60 30 120 9 72 36 142 d Group 2 Group N Group 3 I I I Group 2 Group N & min. d mrn over including 23 6 6 10 10 18 18 30 30 50 * 180 Group 2 Group N Group 3 Pm Prn Pm min. max. min. max. min. max. 2 34 5 50 21 72 (22) (40) (65) 3 41 7 61 26 88 (27) (49) (78) 3 49 8 75 32 107 (33) (59) (93) 4 59 10 92 39 120 (40) (72) (103) 5 71 13 112 49 150 (48) (87) (125) I 71 I 212 Table 9 - Radial internal clearance, dimension series K Group 3 6.3.2 Spherical plain bearing rod ends with sliding contact surfaces: steeVbronze See table IO.
