1、BRITISH STANDARD AEROSPACE SERIES CONFIRMED APRIL 1998 BS 2SP 96: 1982 Specification for Internal retaining rings (imperial sizes) UDC 629.7:621.887:669.14.018.27BS2SP96:1982 This British Standard, having been prepared under the directionof the Aerospace Standards Committee, was published under the
2、authority ofthe Board of BSI and comesintoeffect on 30September1982 BSI 02-2000 The following BSI references relate to the work on this standard: Committee reference ACE/14 Draft for comment 81/73435 DC ISBN 0 580 12900 4 Foreword This revision of BSSP96 specifies a range of internal retaining rings
3、 in imperial sizes only, suitable for aerospace applications and is based onBS3673-1. The range of metric sizes is now contained inBSSP166:1982. BSSP96:1968 is now withdrawn. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are res
4、ponsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 5 and a back cover. This standard has been updated (see copy
5、right date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date of issue CommentsBS2SP96:1982 BSI 02-2000 i Contents Page Foreword Inside front cover 1 Scope 1 2 References 1 3 Definition
6、s and nomenclature 1 4 Material 1 5 Heat treatment and hardness 2 6 Form, dimensions and tolerances 2 7 Finish 2 8 Tests 2 9 Marking 3 Figure 1 Nomenclature of internal retaining ring 1 Figure 2 Radial flatness error 2 Figure 3 Bend and fracture test 3 Figure 4 Bore for permanent set and grip test f
7、or internal retaining rings 4 Figure 5 Internal retaining rings 4 Table 1 Dimensions of internal retaining rings and recommended groove dimensions 5ii blankBS2SP96:1982 BSI 02-2000 1 1 Scope This British Standard relates to internal retaining rings in inch dimensional ranges, manufactured from sprin
8、g steel. Requirements for material, heat treatment, hardness and manufacture are stated, together with dimensions and tolerances. The requirements for the finish and testing of the retaining rings are also given. 2 References This standard makes reference to the following publications: British Stand
9、ards BS 427, Method for Vickers hardness test Part 1: Testing of metals Part 2: Verification of hardness scales. BS 860, Tables for comparison of hardness scales. BS 1133, Packaging code Section 6: Temporary protection of metal surfaces against corrosion (during transport and storage). BS 1134, Meth
10、od for the assessment of surface texture. BS 1449, Steel plate, sheet and strip. BS 1916, Limits and fits for engineering. BS 3673, Spring retaining rings Part 1: Carbon steel circlips. BS S 513, Spring steel strips. BS SP 166, Specification for spring retaining rings for aerospace application: carb
11、on steel circlips (metric series). Ministry of Defence Standards 1) DEF STAN 03-11, Phosphate treatment of iron and steel. 3 Definitions and nomenclature For the purposes of this British Standard, the nomenclature given inFigure 1 applies together with the following definitions: 3.1 designating size
12、 the designating size of a retaining ring is equal to the nominal bore diameter for which the retaining ring is designed 3.2 radial flatness error (dish) on a nominally flat retaining ring, the amount by which the actual thickness is exceeded by the distance separating two parallel planes which just
13、 contain the sectional profile of the ring, the free ends of which are positioned in a common plane in order to discount any spiral effect which may be present (seeFigure 2) 4 Material Retaining rings shall be manufactured from spring steel complying with BSS513, or grade70 or80 of BS1449-1. 1) Obta
14、inable from HMSO. Figure 1 Nomenclature of internal retaining ringBS2SP96:1982 2 BSI 02-2000 5 Heat treatment and hardness 5.1 Retaining rings shall be hardened and tempered so that the minimum hardness after tempering shall be as follows: 5.2 The test load shall be appropriate to the thickness of t
15、he retaining ring and applied in accordance with BS427-1. 5.3 Equivalent hardness values on other approved hardness scales may be used in accordance with BS860. 6 Form, dimensions and tolerances 6.1 General. The form, dimensions and tolerances of retaining rings shall be as given inTable 1, and in a
16、ccordance with6.2 to6.6. 6.2 Holes. Each end of each retaining ring shall have a hole in order to facilitate assembly by use of retaining ring pliers. The holes shall be so positioned that when the retaining ring is fitted in a groove of appropriate dimensions, the hole shall be clear of the interna
17、l diameter of the bore. The diameter of the holes shall be in accordance withTable 1 and sufficient material shall be retained around each hole to ensure that no permanent distortion of the retaining ring ends shall result when retaining ring pliers are applied during assembly of the retaining rings
18、 under normal conditions. 6.3 Lugs. Retaining rings shall have integrally formed lugs. The profile of the lug may vary at the discretion of the manufacturer provided that when passed through a bore of the minimum diameter as given inTable 1, the retaining ring shall be capable of passing over cleara
19、nce diameterC. 6.4 Lug fillet. A fillet of minimum radius equal to the maximum thicknessT of the retaining ring shall be formed adjacent to each lug. The fillet shall blend smoothly with the lug profile and with the minor radial depth. At no point around the contour shall the fillet undercut either
20、the lug profile or the minor radial depth (seeFigure 1). 6.5 Minor radial depth. The minor radial depth (seeFigure 1) shall be not less than the maximum thicknessT of the retaining ring. 6.6 Tolerance on radial flatness. The maximum error on radial flatness shall be as follows: 7 Finish 7.1 Sharp ed
21、ges shall be removed from the retaining rings, which shall be free from burrs, cracks, laminations and other deleterious defects. The bearing faces and outer edges shall be in accordance with section X-X ofFigure 5. 7.2 The retaining rings shall be phosphated in accordance with DEFSTAN03-11. 7.3 Sui
22、table temporary anti-corrosion treatment shall be applied to the retaining rings in accordance with BS1133:Section 6. 8 Tests 8.1 General. Retaining rings shall be tested, after heat treatment, as given in8.2 to8.4. Figure 2 Radial flatness error up to and including 3.0 in designatingsize 480 HV abo
23、ve 3.0 in designating size 460 HV up to and including B0075 designating size of retaining ring 0.0025 in; B0081 up to and including B0150 designating size of retaining ring 0.004 in; B0156 up to and including B0400 designating size of retaining ring 0.006 in.BS2SP96:1982 BSI 02-2000 3 8.2 Hardness.
24、A minimum of three retaining rings shall be selected at random from each heat treatment batch or, in the case of continuous heat treatment, at hourly intervals, and hardness tested in accordance with BS427-1. The hardness of each retaining ring tested shall be within the appropriate range as given i
25、nclause5. 8.3 Bend and fracture test. The retaining rings selected in8.2 shall be bent through30 by repeated light hammer blows around a test block or radius equal to the maximum thickness of the retaining rings (seeFigure 3) following which there shall be no visible sign of fracture cracks or simil
26、ar defects. The retaining rings shall then be further bent until fracture occurs following which a metallurgical examination of the structure shall reveal a uniform grain structure with no signs of laminations or other defects. 8.4 Permanent set and grip test 8.4.1 Retaining rings shall be tested fo
27、r permanent set and grip either as given in8.4.2, or by some other means of testing, including automatic devices, that may be employed subject to the approval of the inspecting authority. 8.4.2 A minimum of2%, selected at random, from each heat treatment batch or, in the case of continuous heat trea
28、tment at2% of each hours production, shall be subjected to a permanent set and grip test. For this test, a multi-stepped cylinder in accordance withFigure 4 shall be used. Each retaining ring, selected as above, shall be mounted within boreY of the cylinder and then caused to follow and maintain con
29、tact with the contours of each step in turn until the retaining ring reaches boreX. The retaining ring shall firmly grip within the boreX and, on removal, shall show no visible defect. Provision shall be made to ensure that at all times during the test the retaining ring is normal to the axis of the
30、 cylinder. NOTEBy “firmly grip” it is meant that with the multi-stepped test cylinder positioned vertically, the retaining ring will remain correctly in position on theX diameter unaided and under its own weight. 8.5 Acceptance. Failure of the selected retaining rings to pass the tests laid down in8
31、.2 to8.4 shall be cause for rejection of the entire batch. NOTEReheat treatment may only be resorted to with the approval of the inspecting authority. 9 Marking Each package or lot of retaining rings shall bear the manufacturers name or trademark and the number of this British Standard i.e.BSSP96 2)
32、 , followed by the appropriate size-designating reference number. The reference numbers shall be as given incolumn1 ofTable 1. Example BSSP96 B0125 is a retaining ring to suit1.250 in nominal diameter bore. 2) Marking BSSP96 on or in relation to a product is a claim by the manufacturer that the prod
33、uct has been manufactured in accordance with the requirements of the standard. The accuracy of such a claim is therefore solely the manufacturers responsibility. Enquiries as to the availability of third party certification to support such claims should be addressed to the Director, Quality Assuranc
34、e Division, British Standards Institution, Maylands Avenue, Hemel Hempstead, Herts HP24SQ in the case of certification marks administered by BSI or to the appropriate authority for other certification marks. Figure 3 Bend and fracture testBS2SP96:1982 4 BSI 02-2000 Dimension in inches. X is D max. (
35、seeTable 1) subject to toleranceH6 (seeBS1916). Y is 1.2 nominal bore diameter. Z is the minimum bore diameter subject to tolerance K6 (seeBS1916). P is 0.125 nominal bore diameter. V is 0.5 nominal bore diameter. Figure 4 Bore for permanent set and grip test for internal retaining rings NOTEBottom
36、of grooves to have radiiR. Figure 5 Internal retaining ringsBS 2SP 96:1982 BSI 02-2000 5 Table 1 Dimensions of internal retaining rings and recommended groove dimensions 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Reference number of retaining ring Designating size (nominal bore diameter) Bore diam
37、eter Thickness of retaining ring Major radial depth Chamfer or radius Internal clearance diameter during assembly Lug hole diameter Groove dimensions B T M Y C Diameter D Width W Radius R min. min. max. min. max. min. max. max. min. min. max. min. max. min. max. in in in in in in in in in in in in i
38、n in in in B0037 0.375 0.373 0.037 0.040 0.045 0.055 0.004 0.008 0.035 0.039 0.393 0.397 0.043 0.047 0.004 B0043 B0050 0.438 0.500 0.436 0.498 0.037 0.037 0.040 0.040 0.050 0.054 0.060 0.066 0.004 0.006 0.008 0.010 0.098 0.160 0.039 0.045 0.459 0.524 0.463 0.528 0.043 0.043 0.047 0.047 0.003 0.004 0
39、.006 B0056 B0062 0.562 0.625 0.559 0.622 0.037 0.037 0.040 0.040 0.059 0.063 0.071 0.077 0.006 0.006 0.010 0.010 0.222 0.285 0.045 0.060 0.589 0.655 0.593 0.659 0.043 0.043 0.047 0.047 0.003 0.003 0.006 0.006 B0068 B0075 0.688 0.750 0.685 0.747 0.037 0.037 0.040 0.040 0.068 0.073 0.082 0.087 0.006 0
40、.006 0.010 0.010 0.348 0.410 0.060 0.060 0.721 0.786 0.726 0.791 0.043 0.043 0.047 0.047 0.003 0.003 0.006 0.006 B0081 B0087 B0093 0.812 0.875 0.938 0.809 0.872 0.935 0.037 0.037 0.0445 0.040 0.040 0.0475 0.077 0.082 0.087 0.093 0.098 0.103 0.006 0.006 0.008 0.010 0.010 0.012 0.472 0.535 0.534 0.060
41、 0.060 0.060 0.851 0.917 0.983 0.856 0.922 0.988 0.043 0.043 0.051 0.047 0.047 0.055 0.003 0.003 0.004 0.006 0.006 0.008 B0100 1.000 0.996 0.0445 0.0475 0.091 0.109 0.008 0.012 0.596 0.060 1.048 1.053 0.051 0.055 0.004 0.008 B0112 B0118 B0125 1.125 1.188 1.250 1.122 1.184 1.245 0.0445 0.0445 0.0445
42、0.0475 0.0475 0.0475 0.101 0.106 0.111 0.120 0.126 0.131 0.008 0.008 0.008 0.012 0.012 0.012 0.721 0.784 0.846 0.076 0.076 0.076 1.178 1.244 1.309 1.183 1.250 1.315 0.051 0.051 0.051 0.055 0.055 0.055 0.004 0.004 0.004 0.008 0.008 0.008 B0131 B0137 1.312 1.375 1.307 1.370 0.0445 0.056 0.0475 0.060 0
43、.116 0.121 0.137 0.142 0.008 0.008 0.012 0.012 0.908 0.865 0.076 0.076 1.373 1.439 1.379 1.445 0.051 0.064 0.055 0.068 0.004 0.004 0.008 0.008 B0143 B0150 1.438 1.500 1.433 1.495 0.056 0.056 0.060 0.060 0.126 0.131 0.148 0.154 0.008 0.008 0.012 0.012 0.928 0.990 0.076 0.076 1.505 1.569 1.511 1.575 0
44、.064 0.064 0.068 0.068 0.004 0.004 0.008 0.008 B0156 1.562 1.557 0.066 0.070 0.136 0.159 0.008 0.012 0.967 0.076 1.634 1.640 0.074 0.078 0.004 0.008 B0162 B0168 1.625 1.687 1.619 1.681 0.066 0.066 0.070 0.070 0.142 0.147 0.165 0.170 0.008 0.008 0.012 0.012 0.030 1.092 0.076 0.076 1.700 1.764 1.706 1
45、.770 0.074 0.074 0.078 0.078 0.004 0.004 0.008 0.008 B0175 B0187 1.740 1.875 1.744 1.869 0.066 0.066 0.070 0.070 0.152 0.162 0.176 0.187 0.008 0.008 0.012 0.012 1.155 1.280 0.076 0.091 1.830 1.960 1.836 1.966 0.074 0.074 0.078 0.078 0.004 0.004 0.008 0.008 B0200 B0212 2.000 2.125 1.992 2.117 0.076 0
46、.076 0.080 0.080 0.172 0.182 0.198 0.209 0.010 0.015 0.015 1.320 1.445 0.091 0.091 2.090 2.220 2.097 2.227 0.084 0.084 0.088 0.088 0.005 0.005 0.010 0.010 B0225 2.250 2.242 0.076 0.080 0.192 0.221 0.010 0.015 1.570 0.091 2.350 2.357 0.084 0.088 0.005 0.010 B0237 B0250 2.375 2.500 2.367 2.492 0.076 0
47、.076 0.080 0.080 0.202 0.212 0.232 0.243 0.010 0.010 0.015 0.015 1.695 1.820 0.091 0.098 2.480 2.609 2.487 2.616 0.084 0.084 0.088 0.088 0.005 0.005 0.010 0.010 B0262 B0275 2.625 2.750 2.616 2.741 0.095 0.095 0.099 0.099 0.223 0.233 0.254 0.265 0.015 0.015 0.020 0.020 1.784 1.909 0.098 0.098 2.739 2
48、.869 2.746 2.876 0.103 0.103 0.107 0.107 0.010 0.010 0.015 0.015 B0287 B0300 B0312 2.875 3.000 3.125 2.866 2.991 3.116 0.095 0.095 0.095 0.099 0.099 0.099 0.243 0.253 0.263 0.276 0.287 0.298 0.015 0.015 0.015 0.020 0.020 0.020 2.034 2.159 2.284 0.098 0.098 0.098 2.998 3.128 3.257 3.005 3.135 3.266 0
49、.103 0.103 0.103 0.107 0.107 0.107 0.010 0.010 0.010 0.015 0.015 0.015 B0325 B0337 3.250 3.375 3.239 3.364 0.095 0.115 0.099 0.119 0.274 0.284 0.309 0.320 0.015 0.020 0.020 0.025 2.409 2.364 0.118 0.118 3.386 3.515 3.395 3.524 0.103 0.123 0.107 0.128 0.010 0.015 0.015 0.020 B0350 B0362 3.500 3.625 3.489 3.614 0.115 0.115 0.119 0.119 0.294 0.304 0.331 0.342 0.020 0.020 0.025 0.025 2.489 2.614 0.118 0.118 3.644 3.773 3.653 3.782 0.123 0.123 0.128 0.128 0.015 0.0
