1、_SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising theref
2、rom, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions.Copyright 2013 SAE International All rights reserved. No part of this pub
3、lication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-4970
4、(outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/AS83819AEROSPACESTANDARDAS83819 Issued 2013-05 Bearings, Plain, Self-Aligning, Self-
5、Lubricating, 1400 cpm (15 fpm), Oscillation, -65 to +160 F (-54 to +71 C) RATIONALEThe reason for creating this standard is to qualify bearings for tail rotor bearing applications. The standard also incorporates an A part number designation for a new liner system that has 2-1/2 times the life of the
6、 standard liner system. 1. SCOPE 1.1 Scope This standard covers the requirements for spherical, self-aligning, self-lubricating, bearings which are for use in the ambient temperature range of -65 to +160 F (-54 to +71 C) at high cyclic speeds 1400 cpm (15 fpm). The scope of this standard is to provi
7、de a liner system qualification procedure for helicopter sliding bearings defined and controlled by source control drawings. Once a liner system is qualified, the source-controlled bearings are further tested under application conditions.Under Department of Defense (DoD) Policies and Procedures, any
8、 qualification requirements and associated Qualified Products List (QPLs) are mandatory for DoD contracts. Any materials relating to QPLs have not been adopted by SAE and are not part of this SAE technical document. 1.2 Classification 1.2.1 Types Bearings covered by this standard shall be of the fol
9、lowing types: Type I - Self-Aligning Bearings with liners of a fabric, composite polytetrafluoroethylene (PTFE) material. Type II - Self-Aligning Bearings with liners of a self-lubricating solid in the race.2. APPLICABLE DOCUMENTS The following publications form a part of this document to the extent
10、 specified herein. The latest issue of SAE publications shall apply. The applicable issue of other publications shall be the issue in effect on the date of the purchase order. In the event of conflict between the text of this document and references cited herein, the text of this document takes prec
11、edence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. SAE AS83819 Page 2 of 26 2.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Ca
12、nada) or 724-776-4970 (outside USA), www.sae.org.AMS-QQ-P-416 Plating, Cadmium (Electrodeposited) AMS1424 Deicing/Anti-Icing Fluid, Aircraft SAE Type I AMS2417 Plating, Zinc-Nickel Alloy AMS2700 Passivation of Corrosion Resistant Steels ARP5448/2 Plain Bearing High Speed Oscillation Test ARP5448/7 P
13、lain Bearing Wear Measurement AS83819/1 Bearings, Plain, Self-Aligning, Self-Lubricating, 1400 cpm (15 fpm) Oscillation, -65 to +160 F (-54 to +71 C)2.2 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www
14、.astm.org.ASTM A967 Standard Specification for Chemical Passivation Treatments for Stainless Steel Parts ASTM C794 Standard Test Method for Adhesion in Peel of Elastomeric Joint Sealant ASTM D3951 Standard Practice for Commercial Packaging ASTM F25 / F25M Standard Test Method for Sizing and Counting
15、 Airborne Particulate Contamination in Clean Rooms and Other Dust Controlled Areas ASTM F50 Standard Practice for Continuous Sizing and Counting of Airborne Particles in Dust- Controlled Areas and Clean Rooms Using Instruments Capable of Detecting Single Sub-Micrometre and Larger Particles2.3 U.S. G
16、overnment Publications Available from DLA Document Services, Building 4/D, 700 Robbins Avenue, Philadelphia, PA 19111-5094, Tel: 215-697-6396, http:/quicksearch.dla.mil/.MIL-DTL-197 Packaging of Bearings, Associated Parts and SubAssembliesMIL-PRF-5606 Hydraulic Fluid, Petroleum Base; Aircraft, Missi
17、le and Ordnance MIL-DTL-5624 Turbine Fuel, Aviation, Grades JP-4, JP-5 and JP-5 MIL-PRF-7808 Lubricating Oil, Aircraft Turbine Engine, Synthetic Base MIL-PRF-83282 Hydraulic Fluid, Fire Resistant, Synthetic Hydrocarbon Base, Aircraft, Metric, NATO Code Number H-537 MIL-STD-129 DoD Standard Practice
18、Military Marking for Shipment and Storage MIL-STD-2073-1 Standard Practice for Military Packaging SAE AS83819 Page 3 of 26 2.4 ANSI/ASME Publications Available from American National Standards Institute, 25 West 43rd Street, New York, NY 10036-8002, Tel: 212-642-4900, www.ansi.org or American Societ
19、y of Mechanical Engineers, 22 Law Drive, P.O. Box 2900, Fairfield, NJ 07007-2900, Tel: 973-882-1170, www.asme.org.ASME B46.1 Surface Texture (Surface Roughness, Waviness, and Lay) ANSI/ASQ Z1.4 Sampling Procedures and Tables for Inspection by Attributes 3. REQUIREMENTS 3.1 Drawing Package The indivi
20、dual item requirements shall be as specified in this main document and the associated product definition data located in AS83819/1. In the event of any conflict between the requirements of this main document and the product definition data, the latter shall govern. 3.2 Qualification Bearings furnish
21、ed under this standard shall be products which are authorized by the qualifying activity for listing on the applicable Qualified Products List (QPL- AS83819) at the time of award of contract (see 6.3). 3.2.1 Retention of Qualification To maintain status on a Qualified Products List (QPL), certificat
22、ion shall be submitted by the manufacturer at two year intervals to the original qualifying activity indicating continued compliance with the requirements of this standard (see 4.3.1 and 6.3) and those products are still available from the listed plant. The qualifying activity shall confirm retentio
23、n ofqualification.3.2.2 Requirements for Qualification Approval Qualification approval of a self-lubricating liner material is based on the satisfactory performance of test bearings to the requirements of this standard. The test conditions and the associated test bearing dimensions are specified in
24、the product definition data in AS83819/1. Prior to initiating the liner system evaluation tests, the manufacturer shall notify the qualifying agency (Subsystems Division, Attn. Airframe Bearings, Code 4.3.5.4, Bldg. 2187, R1B60, NAVAIRSYSCOMHQ, 48110 Shaw Road, Unit 5, Patuxent River, MD 20670-1906)
25、 of the intention to submit for qualification approval. The letter of notification shall state the proposed date of initiation of the tests, the liner system identification (see 3.5) and that qualification approval is desired. Upon completion of the test program, the test data shall be reported in a
26、ccordance with 3.2.3. (Note: Data generated during the development phase of the liner system is not acceptable.) The test data shall meet the qualification test criteria listed in Table 1 of AS83819/1 and 3.16. Additional qualification submittal information is located in 4.3 and 6.3. The report and
27、associated test fee specified by the above qualification activity shall be submitted to the Subsystems Division, Attn. Airframe Bearings, Code 4.3.5.4, Bldg. 2187, R1B60, NAVAIRSYSCOMHQ, 48110 Shaw Road, Unit 5, Patuxent River, MD 20670-1906, and 12 test verification samples shall be sent to Subsyst
28、ems Division, Attn. Airframe Bearings, Code 4.3.5.4, Bldg. 2187, R1B60, NAVAIRSYSCOMHQ, 48110 Shaw Road, Unit 5, Patuxent River, MD 20670-1906. 3.2.3 Requirements for Recording Performance Data The data recorded for 3.11, 3.12, 3.14, and 3.15 and the performance data for 3.16 shall be summarized in
29、report form. To ensure statistical accuracy of test data, the bearing suppliers (or the testing laboratory) shall certify that the data presented is the performance data for all bearings tested and that no data has been deleted. Any test malfunction resulting in an invalid test shall be noted in the
30、 report. A dated drawing uniquely describing the bearing(s), the dimensions, heat treatment, surface finish, platings or coatings, and liner system identification shall be included. The manufacturers liner material identification, whether by trade name or numerical designation, shall be unique to th
31、at liner material and its processing. SAE AS83819 Page 4 of 26 TABLE 1 - CONSTANT LOAD DYNAMIC TEST QUALIFICATION APPROVAL CRITERIA AS83819/1Dash Number Maximum Allowable Average Wear Rate (WR)for any Given Sample (10-6inches/hours) Verification Test Samples -4 6.0 12 3.3 First Article When specifie
32、d in the contract or purchase order, a sample shall be subjected to first article inspection (see 4.4 and 6.4). 3.4 Materials Materials shall be as specified on the product definition data located in AS83819/1. 3.4.1 Plating and Coating Unless otherwise specified in the product definition data, plat
33、ing or coating of the mating surface for the liner system shall be an option of the manufacturer. The mating material to the liner is part of the liner system and if changed would require requalification. If plating or coating is used, it must be identified in the test report and drawings. Plating o
34、f the race shall be in accordance with AMS-QQ-P-416 Type II, Class 2, or AMS2417, Type 2, Grade B and the applicable drawing. 3.4.2 Passivation Passivation should be in accordance with AMS2700, Method 1 (Nitric Acid) or Method 2 (Citric Acid), or ASTM A967 (Citric 1, Citric 2, and Citric 3 are accep
35、table). A permissible method for determining passivity is the Copper Sulfate test defined in ASTM A967 or AMS2700. 3.5 Liner System Identification The liner material and any bonding and curing processes shall be established by the manufacturer and maintained by their in-house manufacturing and quali
36、ty control documents. The manufacturers liner system identification, whether by trade name or numerical designation, shall identify the liner material and the associated bonding and curing process requirements. In addition to the trade name or numerical designation, the manufacturer shall specify in
37、 his test report (see 3.2.3) the classification type and for Type I bearings the average liner thickness in a finished bearing. 3.6 Design Bearing design shall conform to the dimensional requirements in AS83819/1. All other design features shall be shown on the manufacturers drawings and shall be se
38、nt to the Qualifying Activity. Drawings shall show in detail the manufacturers product by specifying all dimensions, tolerances, materials, liners, plating, heat treatment and passivations. Any information the manufacturer deems proprietary must be so indicated. Bearings shall not have loading slots
39、. 3.7 Construction Bearing construction shall conform to the requirements in AS83819/1. Details of the parts shall be shown on the manufacturers drawings and shall be sent to the Qualifying Activity. 3.8 Dimensions and Tolerances Dimensions and tolerances shall be as specified in AS83819/1. Dimensio
40、ns not shown in the product definition data or specified herein shall be shown on the manufacturers drawings and shall be sent to the Qualifying Activity. SAE AS83819 Page 5 of 26 3.9 Surface Texture The specified surface texture shall be in accordance with ASME B46.1. The mating surface for the lin
41、er system shall have a roughness height rating of Ra8 maximum. This rating also applies to pins and shafts. These shafts, pins and mating surfaces may be supplied by the bearing user. The inner bore, all faces and outer ring periphery shall have a surface texture of Ra32 maximum. All other surfaces
42、shall have a texture of Ra125 maximum. 3.10 Lubrication The self-lubricating bearings covered by this standard shall operate without subsequent relubrication. Dry film lubrication is acceptable during manufacture if part of the normal manufacturing process. Grease and oil lubrication are not permitt
43、ed.3.11 Conformity The spherical surface of the ball shall be in proper contact (conformity) with its mating surface (see 3.11.1 or 3.11.2). 3.11.1 Conformity Measurement (Type I Bearings) For spherical bearings with fabric or fabric composite liners, the conformity of the liner and outer rings shal
44、l be measured normally. For bearings with molded liners, the conformity of the liner and the outer rings shall be measured both normally and circumferentially. 3.11.1.1 Normal Conformity of Fabric or Fabric Composite Spherical Bearings (Type I Bearings) When inspected in accordance with 4.7.7.1, the
45、 values of “t measured“ shall be within the appropriate range specified in Table 2. Measurements shall be taken at a minimum of five uniformly spaced positions across the width of the bearing. When radial looseness is specified, the process used to generate looseness shall not distort the ball-to-ou
46、ter ring contour beyond the conformity limits specified in Table 2. When overforming of the outer ring is observed during inspection in accordance with 4.7.7.1, two additional measurements shall be taken in the outer 10% of the outer ring width (one measurement on each side). These additional values
47、 shall not vary from the center value by more than 0.003 inch. Overforming is allowed in the outer 10% of the ring. Underforming is not controlled. These values apply to bearings whose outer ring width (H) to ball diameter (d) ratio is in the range of 0.44 to 0.62. TABLE 2 - ALLOWABLE VARIATIONS Bal
48、l Diameter (d) (inches)Allowable Variation of Conformity Measurements (Type I Bearings) 0 2 Swaged (2) the value determined from the graph of wear versus hours at which time the bearing shall have a minimum of 0.002 inches of liner remaining per ARP5448/7.If the bearing ball has a coating, it shall
49、be visually inspected for signs of chipping, or spalling and a dye penetrant test performed to identify cracking. Results of this investigation shall be included in the test report. 4.7.4 Fluid Compatibility Refer to Table 3 for quantities to be tested. There shall be one for each fluid (listed a. to e.), with two bearings qualified onthe AMS1424 anti-icing fluid. These fluids are to be applied as per 4.7.3. The fluid temperat
