EN 2335:2005 – Aerospace series – Bearings, spherical plain in corrosion resisting steel without assembly slot – Dimensions and loads
1 Scope
This standard specifies the characteristics 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 from – 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 from – 54 °C to 177 °C.
Their field of application when lubricated with grease code letter A is limited to 121 °C.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 1132-1, Rolling bearings – Tolerances – Part 1: Terms and definitions.
ISO 8075, Aerospace – Surface treatment of hardenable stainless steel parts.
EN 2030, Steel FE-PM43 – Hardened and tempered – Bars D ≤ 150 mm – Aerospace series.1)
EN 2337, Aerospace series – Spherical plain bearings – Technical specification.
EN 2424, Aerospace series – Marking of aerospace products.
EN 2491, Aerospace series – Molybdenum disulphide dry lubricants – Coating methods.
EN 3161, Aerospace series – Steel FE-PM3801 (X5CrNiCu17-4) – Air melted – Solution treated and precipitation treated – Bar – a or D ≥ 200 mm – R m≥ 930 MPa. 2)
EN 3490, Aerospace series – Steel FE-PM3901 (X15CrNi17-3) – Air melted – Hardened and tempered – Bar for machining – D e
≤ 200 mm – 900 MPa ≤ R m
≤ 1 100 MPa.2)
3 Terms and definitions
For the purposes of this standard, the terms and definitions given in ISO 1132-1 apply.
4 Symbols and abbreviations
The following symbols for tolerances are used:
∆ d mp
: single plane mean bore diameter deviation
∆ d s
: deviation of a single bore diameter
∆ D mp
: single plane mean outside diameter deviation
∆ D s
: deviation of a single outside diameter
α : angle of tilt of the outer ring with respect to the inner ring, the spherical surface of the outer ring being completely in contact with the inner ring
5 Required characteristics
5.1 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.
5.2 Surface roughness
According to Figures 1 and 2. The values are expressed in micrometres and apply before surface treatment.
EN 2335:2005 – Aerospace series – Bearings, spherical plain in corrosion resisting steel without assembly slot – Dimensions and loads