1、AECMA STANDARD NORME AECMA AECMA NORM prEN 2335 Edition P I December 2001 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES - STANDARDIZATION (AECMA-STAN) Gulledelle 94 - 8-1200 BRUXELLES - Tel. (+32) 2 775 81 10 - Fax. (+32) 2 775 81 11 ICs: 49.035 Descriptors: ENGLISH VERSION Aerospace
2、 series Bearings, spherical plain in corrosion resisting steel without assembly slot Dimensions and loads Srie arospatiale Rotules lisses en acier rsistant la corrosion sans encoche dassemblase Dimensions et charges Luft- und Raumfahrt Gelen klager aus korrosionsbestndigem Stahl ohne Einfhrnut Mae u
3、nd Belastungen This “Aerospace Series Prestandard has been drawn up under the responsibility of AECMA-STAN (The European Association of Aerospace Industries - Standardization). It is published on green paper for the needs of the European Aerospace Industry. It has been technically approved by the ex
4、perts of the concerned Domain following member comments. 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 review
5、 by users and formal agreement of AECMA-STAN it will be submitted as a draft European Standard to CEN (European Committee for Standardization) for formal vote. - Nota - Extra copies can be supplied by B.N.A.E. - Technopolis 54 - 199, rue Jean-Jacques Rousseau - 92138 ISSY-LES-MOULINEAUX CEDEX Editio
6、n approved for publication 2001-12-28 Comments should be sent within six months after the date of publication to Gulledelle 94 AECMA-STAN 8-1200 BRUXELLES - Mechanical Domain Mr Feltham I aecrna 20 Page 2 prEN 2335: 2001 Blank page Page 3 prEN 2335: 2001 I Scope This standard specifies the character
7、istics of spherical plain bearings in corrosion resisting steel, without assembly slot, with or without swaging groove, with or without lubrication holes and grooves, intended for use in fixed or moving parts of aircraft structure and control mechanisms. They may be used in the temperature range fro
8、m - 54 “C to 150 “C. However, as they are lubricated with the following greases (see EN 2337): - ester type very high pressure grease (code letter A), operating range from - 73 “C to 121 “C or, - synthetic hydrocarbon type very high pressure grease general purpose (code letter B), operating range fr
9、om - 54 “C to 177 “C. Their field of application when lubricated with grease code letter A is limited to 121 “C. 2 Normative references This European Standard incorporates by dated or undated reference provisions from other publications. These normative references are cited at the appropriate places
10、 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 incorporated in it by amendment or revision. For undated references the latest edition of the publication referre
11、d to applies. IS0 1132-1 IS0 8075 EN 2030 EN 2337 EN 2424 EN 2491 EN 3161 EN 3490 Rolling bearings - Tolerances - Part I : Terms and definitions Aerospace - Surface treatment of hardenable stainless steel parts Steel FE-PM43 - Hardened and tempered - Bars O 5 150 mm - Aerospace series 1) Aerospace s
12、eries - Spherical plain bearings - Technical specification 2) Aerospace series - Marking of aerospace products Aerospace series - Molybdenum disulphide dry lubricants - Coating methods Aerospace series - Steel FE-PM3801 (X5CrNiCu17-4) - Air melted - Solution treated and precipitation treated - Bar -
13、 a or 0 2 200 mm - R, 2 930 MPa 2) Aerospace series - Steel FE-PM3901 (Xl5CrNi17-3) - Air melted - Hardened and tempered - Bar for machining - De I200 mm - 900 MPa 5 R, I I 100 MPa 2) 3 Symbols, terms and definitions For the purpose of this standard, the terms and definitions given in IS0 1132-1 app
14、ly. The following symbols for tolerances are used: Ad, : single plane mean bore diameter deviation Ads : deviation of a single bore diameter AD, : single plane mean outside diameter deviation A.D : deviation of a single outside diameter a : angle of tilt of the outer ring with respect to the inner r
15、ing, the spherical surface of the outer ring being completely in contact with the inner ring 1) Published as AECMA Standard at the date of publication of this standard 2) Published as AECMA Prestandard at the date of publication of this standard Page 4 prEN 2335: 2001 4 Required characteristics 4.1
16、Configuration, dimensions and masses According to figures 1, 2 and 3 and table 1. The dimensions are expressed in millimetres and apply after surface treatment. 4.2 Surface roughness According to figures 1 and 2. The values are expressed in micrometres and apply before surface treatment. 45“I2 W I a
17、 For the inner ring For the outer ring Figure I - Bearing without swaging grooves, code letter S 45 a For the inner ring For the outer ring Figure 2 - Bearing with swaging grooves, code letter R Page 5 prEN 2335: 2001 / / Code letter E: Code letter F: Code letter G: Bearing without lubrication holes
18、 and groove inner ring and: the outer ring and: Bearing with lubrication holes on - a lubrication groove on the bore of the inner ring - a distribution groove on spherical surface of the inner or outer ring Bearing with lubrication holes on - a lubrication groove on the outer surface of outer ring -
19、 a distribution groove on spherical surface of the inner or outer ring Key 1 Three holes 0d3 at 120 NOTE The confiauration with or without lubrication hole and lubrication groove amlies to bearings either code letter R or code letter S. Figure 3 Table 1 - ao Mass nin.d = 16 3 13 5 15 8 12 12 11 17 8
20、 32 9 10 49 11oc Without lubrication holes and groove Without swaging groove Maximum values for the user Page 6 prEN 2335: 2001 axial radial max. reduced normal normal code letter P code letter N code letter P 4.3 Clearances and loads See table 2. radial axial a cs Ca Table 2 5 to 60 Internal cleara
21、nces urn 428,8 38 558,4 50 35 20 760,l 64 1056 104,OO Permissible static loads kN number 1- normal code letter N * +I 35 to 75 +I 40 to 80 25 50 to 100 40 1 60to120 60 5 to 35 20 I 70 I 5,3 I 25 5 to 40 21 6,7 18 5 to 50 1 30 1 15 a These values apply to bearings without swaging groove. For bearings
22、 with swaging grooves, the push-out loads may be smaller than these values. 4.4 Materials Inner ring: according to EN 2030, 55 HRC to 62 HRC Outer ring: according to EN 3490 or EN 3151,28 HRC to 37 HRC before swaging 4.5 Surface treatment 4.5.1 Outer ring Dry-film lubricant on the spherical surface
23、(antiscoring treatment) applied according to EN 2491. 4.5.2 Inner ring Passivation according to IS0 8075: code letter T Without surface treatment (passivation): without code letter Page 7 prEN 2335: 2001 Internal clearances (see table 2) Diameter code number d (see table 1) 5 Designation Lubrication
24、 holes and grooves code letter (see figure 3) Swaging grooves code letter (see figures 1 and 2) Surface treatment code letter (see 4.5) EXAMPLE: Dimensional varieties code number for swaging grooves (see table 1) 6 Marking EN 2424, style A The marking position is at the manufacturers option. 7 Technical specification EN 2337
