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BSI 18/30377544 DC:2018 Edition

BSI 18/30377544 DC:2018 Edition

$13.70

BS EN 2755. Aerospace series. Bearings, spherical plain in corrosion resisting steel with self-lubricating liner. Elevated load at ambient temperature. Technical specification

Published By Publication Date Number of Pages
BSI 2018 38
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PDF Catalog

PDF Pages PDF Title
7 1 Scope
2 Normative references
8 3 Terms and definitions
9 4 Requirements characteristics, inspection and test method
20 5 Quality assurance
5.1 Production qualification
21 5.2 Acceptance conditions
5.2.1 Inspection and tests to be carried out by the manufacturer
5.2.2 Purchaser’s (user’s) quality control
6 Packaging
7 Certificate of compliance
26 Annex A (normative) Verification of permissible and ultimate static loads
A.1 Permissible radial static load (Cs)
A.1.1 Principle
A.1.2 Method
A.2 Ultimate radial static load
A.2.1 Principle
A.2.2 Method
27 A.3 Permissible axial static load (Ca)
A.3.1 Principle
A.3.2 Method
A.4 Ultimate axial static load
A.4.1 General
A.4.2 Principle
A.4.3 Method
30 Annex B (normative) Verification of dynamic radial load (C25)
B.1 Principle
B.2 Method
B.2.1 Testing at ambient temperature
B.2.2 Testing at low temperature
B.2.3 Testing at elevated temperature
31 B.2.4 Test at ambient temperature after immersion
32 Annex C (normative) Fluids – Essential characteristics
C.1 Fuel for turbine aero engine
C.2 Fluids for de-icing circuit
C.3 Hydraulic fluids
C.3.1 Mineral fluid for hydraulic transmission
C.3.2 Phosphate of ester hydraulic fluid
C.4 De-icing and anti-icing fluids
33 Annex D (normative) Measurement of the peel strength of the liner
D.1 Principle
D.2 Method
35 Annex E (normative) Simplified qualification procedure
E.1 Rules for application
E.1.1 General
E.1.1.1 Be holder of an approval according to EN 9100 on all production sites for the products to be qualified.
E.1.1.2 Be a manufacturer who is well established in terms of his manufacturing facilities and be one who has supplied established plain bearings to European prime users for a number of years to National or Company aerospace standards and has obtained…
E.1.1.3 The manufacturer shall propose which procedure is to be applicable, to be decided upon by the ASD-CERT mandated body in connection with the preparation of the test programme.
E.2 Choice of references
36 E.3 Rules for qualification
E.3.1 If the manufacturer has not previously obtained qualification according to this standard the first metric or inch series plain bearing to be tested shall be subject to full testing (number of samples: 13).
E.3.2 To obtain the qualification of the other dimensions, the selected plain bearings should pass according to this standard:
37 E.3.3 Qualification of one plain bearing size of an EN product standard qualifies the plain bearing immediately before and the one immediately after the plain bearing in question, within the range of plain bearings indicated in the product standard.
E.3.4 To qualify on group, at least one dimension of each torque type of plain bearing should have been qualified.
E.3.5 As inch and metric series plain bearings are very similar in group 1 and 2, qualification of one metric size bearing of an EN product standard qualifies the inch size bearing in accordance with Table E.2.
E.4 Plain bearing distribution

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