BS/EN 6046-2020 pdf download.Aerospace series — Bearing, spherical, plain, in corrosion resisting steel — Narrow series — Dimensions and loads — Inch series.
This BS/EN 6046 specifies the characteristics of inch based spherical plain bearing, metal to metal, in corrosion resisting steel, narrow series.
They are intended for use in fixed or moving parts of the aircraft structure and their control mechanisms.
They shall be used in the temperature range as determined by the grease capability as below:
— code A: grease as per MIL-PRF-23827 Type I. operating temperature range —73 °C to 121 °C;
— code B: grease as per MIL-PRF-81322, operating temperature range —54°C to 177 °C. The range of application for bearings lubricated with grease per code A is limited to 121 °C. In both cases the spherical surface of the outer or inner ring have to be provided with a dry-film
lubricant as per MIL-PRF-46010 or equivalent (anti-seizing protection). 2 Normative references
The following documents are referred to In the text in such a way that some or all of their content constitutes requirements 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.
EN 2030, Aerospace series — Steel Xl O5CrMo 17 (1.3544) — Hardened and tempered — Bars — De≤lSOmm
EN 2133, Aerospace series — Cadmium plating of steels with specified tensile strength ≤1 450 MPa, copper, copper alloys and nickel alloys
EN 2337, Aerospace series — Spherical plain bearings — Technical specification EN 2424. Aerospace series — Marking of aerospace products
EN 3161, Aerospace series — Steel FE-PM3801 (X5CrNICuI 7-4) — Air melted, solution treated and precipitation treated, bar a or D ≤200 mm, Rm  930 MPa
Ml L-PRF-2 3827, Grease, Aircraft and Instrument, Gear and Actuator Screw1
MIL-PRF-81322, Grease, aircraft.general purpose, wide temperature range1
MIL-PRF-46010, Lubricant, Solid Film, Heat Cured, Corrosion Inhibiting NATO Code — S-1738
ISO 1132-1, Rolling bearings — Tolerances — Part 1: Terms and definitions
ISO 8075, Aerospace — Surface treatment of hardenable stainless steel parts
3 Terms and definitions
For the purposes of this document, the terms and definitions given in TR 4475 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at http://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/ Symbols of limit deviations are in accordance with definitions of ISO 1132-1.
a maximum angle of tilt of the outer ring with respect to the inner ring, with the spherical surface of the outer ring being completely in contact with the inner ring
Ca permissible static axial load
C permissible static radial load
dnip single plane mean bore diameter deviation
Dmp single plane mean outside diameter deviation
ds deviation of a single bore diameter
deviation of a single outside diameter
4 Requirements
4.1 Configuration, dimensions, tolerances and mass
See Figure 1, Figure 2 and Table 1. Dimensions and tolerances are expressed in millimetres (inches).
Values apply after surface treatment.
4.2 Surface roughness
In accordance with Figure 1 and Figure 2. Values in micrometres (micro inches) apply prior to surface treatment.
4.3 Material
Inner ring: see EN 2030; hardness 55 ≤ HRC ≤ 62.
Outer ring: see EN 3161; hardness 28 ≤ HRC ≤ 38; before swaging.
4.4 Surface treatment
Without code: Surface treatment according to ISO 8075 (or inner ring before swaging.
CodeZ: Surface treatment according to IS08075 for inner ring before swaging. Cadmium plating of outer ring: 5 pm to 8 pm (0.2 pin to
0.3 pin) according to EN 2133. followed by chromating.
WithoutswaginggroovecodeS: cylindrical surface area and chamfers and both end surfaces at manufacturer’s option
With swaging groove code R: cylindrical surface area, broken angles and radii, respectively, as well as both end surfaces up to the swaging grooves
6 Marking
Each spherical plain bearing shall be marked at least in accordance with EN 2424, style A. In addition, the bearing may be marked with manufacturer’s part number.
Marking position and method are at manufacturer’s option.
7 Technical specification
According to EN 2337 and TR 4475.
8 Quality management system
The manufacturer’s operations shall be an approved production organisation for aerospace products and shall demonstrate that it has implemented and is able to maintain a quality management system (e. g. according to EN 9100 or an equivalent aerospace accepted and established quality management system).
The qualification procedure for aerospace standard products (e.g. according to EN 9133 or an equivalent aerospace accepted and established qualification procedure) shall be used and documented according to the specified tests if not otherwise agreed between customer and supplier.BS/EN 6046-2020 pdf download.