1、BSI BS*EN*20b b W 3624669 0547741 499 W NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BRITISH STANDARD AEROSPACE SERIES I BS EN Rod ends with self-lubricating self-aligning bearings - Technical specification The European Standard EN 2068 : 1996 has the status of a British St
2、andard ICs 49.040.30 068 : 1996 BSI BSxENr2068 96 W 1624669 0547742 325 AmdNo. Date BS EN 2068 : 1996 Text affm Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee ACEY14, Aerospace details and parts, upon which the foliowing
3、 bodies were represented British iron and Steel Producers Association Cid Aviation Authority (Airworthiness Division) Federation of Wire Rope Manufacturers of Great Britain institute of Petroleum Ministry of Defence Society of British Aerospace Companies Stainless Steel Wire industry Association Thi
4、s British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 June 1996 o BI 1996 The following BSI references relate to the work on this Standard: Committee reference ACEY14 Draft fo
5、r comment 89/71649 DC ISBN O 580 25657 X BSI BS*EN*2068 96 = 1624669 0547743 261 BS EN 2068 : 1996 Contents page Inside front cover Committees responsible National foreword ii Foreword 2 Specification 1 Scope 3 2 Nomiative references 3 3 Definitions 3 4 5 Quaiityassmce 6 Packaging 7 Certificate of c
6、odormity Required characteristics, inspection and test methods Annexes A (normative) Verification of the ultimate static load 10 B (normative) Verification of push-out proof load 11 Tables 1 Untitled 4 2 8 3 8 4 9 Nondestructive inspections and tests to be carried out for qualification Destructive i
7、nspections and tests to be carried out for quaiifcation Inspections and tests to be carried out for acceptance Figures 1 2 Discontinuities on thread flank A.l Untited B.1 Untied Discontinuities on crest of thread 6 6 10 11 O BSI 1996 i BSI BS+EN*ZOb8 b m 1624bbq 0547744 1T8 m BS EN 2068 : 1996 Natio
8、nal foreword This British Standard has been prepared by Technical Committee ACW14 and is the English language version of EN 2068 : 1996 Aerospace series - Rod ends with self-lubricating self-aligning bearings - Twhnkal spechall conform with the Iroduct standards or design iocumentation See figures 1
9、 and 2 Yo clearance, whether axial 3r radial shall be perceptible. Shall conform with the product standards or design documentation. Shall conform with the product standards or design documentation After the removal of the load, there shall be no cracks or deterioration of th rod end. Shall conform
10、with the product standards or design documentation When maintaining the load, there shall be no displacement of the bearing in the rod end. lisual inspection 4s per surface treatment standard 3) fxamination of micrographic Lection for : - qualification : on finished parts ; - acceptance : by samplin
11、g during manufacture Suitable methods Suitable procedures and measuring nstruments . Measurement of the starting torque shall be preceded by some rotations and a few swivelling movements by hand. - Measure at least five times the torque applied progressively to the inner ring of the bearing, in both
12、 directions, with the rod end held stationary. Only the highest value shall be taken into account. See annexe A See annexe 0. 3) These inspections shall be made in the absence of surface treatment, which, for the purpose of aualification. may be removed by a chemical process. - - _1 _ - BSI BS*EN*20
13、68 96 m 1624669 0547750 4Tl - Page 6 EN 2068 : 1996 1) See IS0 5855-1. 2) See is0 5855-2. Figure 1 - Discontinuities on crest of *read BSI BStEN*K2068 96 Lb24669 0547753 338 Page 7 EN 2068 : 1996 5 uality assurance 5.1 Product qualification See EN 3042 and tables 2 and 3. Oualification shall be obta
14、ined for each rod end. 5.2 Acceptance conditions 5.2.1 Inspections and tests to be carried out by the manufacturer See table 4. 5.2.2 Users quality control The user may, on acceptance of a delivery batch, proceed to inspect it by using the inspections specified in table 4, in full or in part, to ens
15、ure that the items conform to the required quality level, and to determine whether the delivery batch is acceptable. This inspection can be carried out in the users factory, or by special agreement with the manufacturer in the manufacturers factory. 6 Packaging The rod ends shall be packaged individ
16、ually and in such a way that they will not be damaged during transportation. They shall be protected against moisture, corrosion, dirt and other harmful substance. The packaging material in contact with the bearing shall provide this protection. The following indications shall be affixed to each ind
17、ividual package : - manufacturers name and address; - identity block as defined by product standards or design documentation; - packaging date. The following indications at least shall appear on collective packaging : - manufacturers name and address; - number of order; - quantity; - identity block(
18、s) as defined by product standards or design documentation. 7 Certificate of conformity Ali the rod ends supplied in accordance with this standard shall be accompanied by a certificate of conformity from the manufacturer. BSI BS*EN*:ZlOb b Lb24bb 0547752 274 Ultimate static Joad Page 8 EN 2068 : 199
19、6 4.13 X X Table 2 - Non-destructive inspections and tests to be carried out for qualification Grooves 4.6 X X X Surface treatment 4.9 X X X Internal clearances 4.1 1 X X X X X Starting torque at zero load 4.12 X X X X X Push-out proof load 4.14 X X X 11 The order is left to the initiative of the qu
20、alification authority. 2) Samples without surface treatment I Table 3 - Destructive inspections and tests to be carried out for qualification BSI BS*EN*2068 96 Lb2Ybb 0547753 IO0 Materials Dimensions and tolerances Masses Page 9 EN 2068 : 1996 4.1 4.2 4.3 Table 4 - Inspections and tests to be carrie
21、d out for acceptance Marking Surface appearance of the assembled fitting 4.4 4.5 Surface roughness Surface treatment Hardness 4.8 4.9 4.7 Thread discontinuities Internal clearances 4.10 4.1 1 Starting torque at zero load 1 4.12 Sampling pian 21 3) Certificate of conformity of semi- finished products
22、 manufacturer Thread : 100 % Rest of rod end : 10 % or one part min. Three parts 100 % 100 % - After manufacturers heat treatment: 100 % - Material used as delivered: no inspection 5 % or one part min. One part per surface treatment 1% or one part if c 100 100 % 100 % 1 the time of manufacture. 2) F
23、or the manufacturer: When the sampling is not 100 %, any defect found in the course of ar inspection or test requires this inspection to be extended to 100 %. 3) May vary with the approval of the user or authority responsible for acceptance BSI BS*EN*2068 b = 1624667 0547754 047 I R-i I Page 10 EN 2
24、068 : 1996 Shaft Annex A (normative) Verification of the ultimate static load A.l Principle See figure A.l, as an example. A.2 Method Mount the rod end as shown in figure A.l with a clearance of 0,025 mm max. between the bearing and the shaft. Apply the ultimate static load progressively at 1 % /s.
25、Maintain it for 3 min. Remove the load progressively at 1 % IS. Check. 1 I I Rod end Ultimate static load Figure A.1 - BSI BS*EN*20b cib 1624669 0547755 T83 Page 11 EN 2068 : 1996 Annex B Inormative) Verification of push-out proof load 8.1 Principle See figure B. 1, as an example. 8.2 Method Mount t
26、he rod end as shown in figure B. 1. Apply a pre-load equal to 5 % of the push-out proof load. Set ?he dial gauge at zero. Under no circumstances shall the load be applied to the bearing inner ring. Progressively increase this load at the rate of 1 % /s until the maximum value is obtained. Maintain i
27、t for 1 min. Check the behaviour of the bearing with the dial gauge. Remove the load progressively at 1 % /s. Carry out this test successively on each face of the rod end. Dimensions in millimetres Push-Out proof load Inner ring clearance recess Support ring 4 = 0 D 1 + 1.3 min. I 1) See EN 2501. t
28、ring Figure B.1 BSI BS*EN*20b8 b Lb24bb9 0547756 9LT BS EN 2068 : 1996 List of references See national foreword. BSI BS*EN*ZOb 96 L624bb 0547757 56 BS EN 2068 : 1996 BSI 389 Chiswick High Road London w4 4AL BSI - British Standards Institution BSI is the independent national body responsible for prep
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