EN 6097-2019 pdf download.Aerospace series – Bearing, spherical plain, metal to metal,extra wide inner ring in corrosion resisting steel -Dimensions and loads – Inch series.
This EN 6097 specifies the characteristics of inch based spherical plain bearings, metal to metal, in corrosion resisting steel, extra wide inner ring inch series.
They are intended for use in fixed or moving parts of the aircraft structure and their control mechanisms.
The slide hole treatment either at the outer ring or inner ring.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. 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≤l5Omm
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 (X5CrN1Cu1 7-4) — Air melted, solution treated and
precipitation treated, bar a or D ≤200 mm, Rm  930 MPU
ISO 1132-1, Rolling bearings — Tolerances — Part 1: Terms and definitions
ISO 8075, Aerospace — Surface treatment of hardenable stainless steel parts
MIL-PRF-23827, Grease, aircraft and instrument, gear and actuator screw, NATO code No.G-354 metric1
MIL-PRF-46010, Lubricant, solid film, heat cured, corrosion — inhibiting, NATO Code-S-I 7381
MIL-PRF-81322, Grease, aircraft, general purpose, wide temperature range, NATO Code G-395’
TR 4475, Aerospace series — Bearings and mechanical transmissions for airframe applications — Vocabulwy²
— ISO Online browsing platform: available at http://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
Symbols of limit deviations are En accordance with definitions of ISO 1132-1.
ci 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
Admp single plane mean bore diameter deviation
‘Dmp single plane mean outside diameter deviation
deviation of a single bore diameter
deviation of a single outside diameter
4 Requirements
4.1 Configuration, dimensions, tolerances and mass
Configuration, dimensions, tolerances and mass shall be according to Figure ito Figure 5 and Table 1.
Table 1 and Table 3: Dimensions and tolerances are expressed in millimeters (inches).
Figure 1 and Figure 2: Dimensions and tolerances for Ra max. are expressed in pm (pin).
Values apply after to surface treatment.
4.2 Surface roughness
Surface roughness shall be according to Figure 1 and Figure 2.
Values in micrometer (mIcro inches), apply prior to surface treatment.
Surface roughness is measured before 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
Surface treatment shall be as defined in chapter 5 (designation) with following codes:
— code T: Surface treatment according to ISO 8075 for inner ring before swaging; outer ring: no treatment;
— code P: Surface treatment according to Iso 8075 for inner ring before swaging; cadmium plating of outer ring according to EN 2133. 5 pim to 8 tm (200 pun to 300 pin).
4.5 Swaging groove
Swaging groove shall be described in chapter 5 (designation) with following codes:
Without swaging groove code S:
Surface treatment according to ISO 8075 for inner ring before swaging, Cadmium plating of outer ring:
5 m to 8 pm (200 pin to 300 pin) according to EN 2133 (cylindrical surface area and chamfers and both end surfaces at manufacture’s option), followed by chromating.
With swaging groove code R:
Surface treatment according to ISO 8075 for inner ring before swaging. Cadmium plating of outer ring:
5 lim to 8 pm (200 pun to 300 pin) according to EN 2133 (cylindrical surface area, broken angles and radii, respectively, as well as both end surfaces up to the swaging grooves), followed by chromating.
4.8 Temperature range, grease and lubricant
They shall he used in the temperature range as determined by the grease capability see below.
As they are lubricated by means of the following greases:
— code A: grease as per MIL-PRF-23827, Type 1 operating temperature range —73°C to 121 °C;
— code B: grease as per MIL-PRF-81322, operating temperature range —54 °C to 177 °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).EN 6097-2019 pdf download.