1、 STD*AECMA PREN i35L-ENGL 2777 M LOL23LL 002373b 277 D Edition approved for publication AECMA STANDARD NORME AECMA AECMA NORM Comments should be sent within six months CI Chairman after the date of Dublication to prEN 4351 Edition P 1 December 1997 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE
2、INDUSTRIES (AECMA) Gulledelle 94 - 8-1200 BRUXELLES - Tel. (+32) 2 775 81 10 - Fax. (+32) 2 775 81 11 ICs: Descriptors: ENGLISH VERSION Aerospace series Rod ends, with self-aligning double row ball bearings and threaded shank in corrosion resisting steel Dimensions and loads Inch series Srie arospat
3、iale Luft- und Raumfahrt Embouts rotule sur deux ranges de billes et tige filete en acier rsistant Dimensions et charges senkpfe mit zweireihigem Pendelkugellager und Gewindeschaft aus Mae und Belastungen la corrosion korrosionsbestndigem Stahl Sries en inches Inch-Reihe This “Aerospace Series“ Pres
4、tandard has been drawn up under the responsibility of AECMA (The European Association of Aerospace Industries). It is published on green paper for the needs of AECMA-Members. It has been technically approved by the experts of the concerned Technical committee following comment by the Member countrie
5、s. Subsequent to the publication of this Prestandard, the technical content shall not be changed to an extent that interchangeability is affected, physically or functionally, without re-identification of the standard. After examination and signature of the AECMA Standard Checking Centre (NPS) and fo
6、rmal agreement of the Official Services of the Member countries it will be submitted as a draft European Standard to CEN (European Committee for Standardization) for formal vote. 1997-1 2-31 AECMA Gulledelle 94 B-1200 BRUXELLES Mr streicher aecrna 1997 STD-AECMA PREN q351-ENGL 1997 m 1012311 0033737
7、 125 m Page 3 prEN 4351 O Introduction This European Standard contains also Imperial units (non-SI units) besides the legal SI units. It is emphasized that the use of these non-SI units is not allowed according to Council Directive 80/181 (Council Directive of 20 December 1979 on the approximation o
8、f the laws of the Member States relating to units of measurement and on the repeal of Directive 71/354/EEC). These Imperial units are quoted in brackets and only meant for assistance in business and official situations with countries still working with them. 1 Scope This standard specifies the chara
9、cteristics of adjustable rod ends with self-aligning double row ball bearings and threaded shank, inner ring and balls in corrosion resisting steel. They consist of: - a rod end comprising: - either seals or shields; - an optional longitudinal groove for locking purpose; - an inner ring with balls.
10、These rod ends are intended for use with flight control rods or rods for aerospace structures. They are intended to be used in the temperature range: -54 OC to +150 “C. However, being lubricated with the following greases: - very high pressure grease, ester type (code A), operational range -73 “C to
11、 +121 “C or - very high pressure grease, synthetic hydrocarbons, general purpose (code B), operational range -54 “C to +177 “C (see EN 2067), their field of application when lubricated with code A grease is limited to +121 “C. 2 Normative references This European Standard incorporates by dated or un
12、dated reference provisions from other publications. These normative reference are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when
13、incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. IS0 11 32 IS0 3161 Rolling bearings - Tolerances - Definitions UNJ threads, with controlled root radius, for aerospace - Inch series IS0 3353 Aerospace - Rolled threads for
14、bolts - Lead and runout requirements Aerospace - Surface treatment of hardenable stainless steel parts Steel FE-PM43 - Hardened and tempered - Bars D I 150 mm - Aerospace series) Aerospace series - Rod ends with self-aligning ball bearings - Technical specification IS0 8075 EN 2030 EN 2067 EN 2099 S
15、teel FE-PL71 - Carburized, hardened and tempered - Bar De I 100 mm - Aerospace series) EN 2133 Aerospace series - Cadmium plating of steels with maximum specified tensile strength equal to or less than 1 450 MPa, copper, copper alloys and nickel alloys) Aerospace series - Marking of aerospace produc
16、ts Aerospace series - Steel FE-PM42 - Hardened and tempered - 900 I R, I 1 100 MPa Bar for machining D, i 100 mm Aerospace series - Steel FR-PM42 - Hardened and tempered 900 I RP I 1 1 O0 MPa - Forgings - D, I 1 O0 mm EN 2424 EN 3490 EN 3491 ) Published as AECMA Standard at the date of publication o
17、f this standard *) In preparation at the date of publication of this standard ) Published as AECMA Prestandard at the date of publication of this standard H2LK (A/4,F/F/G/A) Previous page is blank STD-AECMA PREN Li35L-ENGL 1777 m LOL23LL 0033938 Ob1 m Paye 4 prEN 4351 3 Symbols The definitions of de
18、viations and clearances are given in IS0 1132. 4,s = deviation of a single bore diameter Admp = single plane mean bore diameter deviation a = angular displacement permissible between inner and outer ring axis of a set of aligning bearings c, = permissible static radial load Fa max. = permissible sta
19、tic axial load 4 Required characteristics 4.1 Dimensions - Masses Configuration: according to figure 1. Values: according to figure 1 and table 1: values after cadmium plating and passivating. 4.2 Surface roughness According to figure 1, values in vm (pin) prior to cadmium plating and passivating. R
20、olling elements and raceways: R, = 0,2 vm (8 pin). 4.3 Materials Rod end body: Steel according to EN 3490 or EN 3491; heat treated to obtain: - by case hardening, hardening and tempering a surface hardness of 2 58 HRC to a depth of 1 mm on the raceway; - by hardening and tempering a strength R, I830
21、 MPa on the whole rod end. Inner ring: Steel according to EN 2030, hardness 2 58 HRC Rolling elements: Steel according to EN 2030, hardness 2 58 HRC Seals: Polytetrafluoroethylene (PTFE) or glass fabric reinforced polytetrafluoroethylene (PTFE) Shields: Corrosion resisting material Retaining rings:
22、Corrosion resisting material 4.4 Surface treatment Rod end body: All outer surfaces with the exception of the raceway, cadmium plating and chromating according to EN 2133, 10 pm to 20 pm (400 pin to 800 pin). Exception: threads, coat thickness 5 pm to 10 pm (200 pin to 400 pin). Inner ring and rolli
23、ng elements: surface treatment according to IS0 8075. H2LK (A/4.F/F/G/A) STD-AECMA PREN i35L-ENGL 3777 LU12331 0033737 TTB W . Page 5 prEN 4351 Dimensions in millimetres (Dimensions in inches) A- 1 / II A-A Y Type 1 Type 2 (Code K1) (Code K2) Without longitudinal groove (Code T) 1 Type with seals (c
24、ode E) 2 Type with shields (code P) ) Runout according to IS0 3353. 1 2 v Z NOTE: The installation of seals and shields is at the manufacturers option. HPLK (A/IIF/F/G/A) Page 6 prEN 4351 h s Q 5 N I O x o c n ._ a E m L“ m 0- *R - Y os NI 2 %- h “ “909 c E .- 3- o) U o Page 7 prEN 4351 I= STDDAECMA
25、 PREN 4351-ENGL 1777 m 1012311 0013742 572 = Permissible static loads Page 8 prEN 4351 Starting torque) max. 4.5 Loads, starting torques and clearances According to table 2. Table 2 Axial load Fa max.2) N 21 28 3369 3984 mN.m With seals With shields 4,0 2,0 10,0 510 12,0 7,0 Diameter code Diameter c
26、ode o1 02 03 04 05 06 07 10 11 12 13 14 15 20 21 22 23 24 Test torque min. Hadial load Cs2) N 681 O 10780 12750 ) Definition and testing according to EN 2067. *) Definition and testing for ultimate static loads according to EN 2067, annex E. Dimensions in millimetres (Dimensions in inches) Clearance
27、 I) IJm (Pin) Radial 1 to 5 (39 to 197) Axial max. 80 (31 50) 4.6 Retention of seals or shields Definition and testing according to EN 2067, annex A. Table 3 I O1 to24 I 5,O Nm 1 HPLK (A/4.F/F/G/A) Page 9 prEN 4351 L R 5 Designation EXAMPLE: left hand thread right hand thread Description block Ident
28、ity block ROD END Code letter for thread (see table 4) Number of this standard Diameter code (see table 1) Code letter for shields or seals (see figure 1) Code for longitudinal groove type (see figure 1) Code letter for grease (see 1) Table 4 ! Code letter for thread 1 NOTE: If necessary, the code I9005 shall be placed between the description block and the identity block. 6 Marking According to EN 2424, style A. Marking position and method are at manufacturers option. 7 Technical specification According to EN 2067. H2LK (A/4.F/F/G/A)
