1、_ 6$(7HFKQLFDO6WDQGDUGV%RDUG5XOHVSURYLGHWKDW7KLVUHSRUW LVSublished 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 therefrom, is th
2、e sole responsLELOLWRIWKHXVHU 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 2016 SAE International All rights reserved. No part of this publication may be
3、 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 (outside USA) F
4、ax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/AS8914B AEROSPACE STANDARD AS8914 REV. B Issued 1999-08 Revised 2016-03 Superseding AS8914A Bearin
5、g, Roller, Self-Aligning, Airframe, Antifriction FSC 3110 RATIONALE AS8914, Rev. B is a five year review. Updating standard to current requirements. Added zinc-nickel plating. 1. SCOPE 1.1 This standard covers the requirements for nonseparable antifriction roller bearings. 1.2 Classification Bearing
6、s shall be of the following types as specified (see 6.2): Type I Bearing, roller, self-aligning, single row, airframe, antifriction, sealed Type II Bearing, roller, self-aligning, double row, airframe, antifriction, sealed Type III Bearing, roller, self-aligning, double row, wide inner ring, airfram
7、e, antifriction, sealed Type IV Bearing, roller, self-aligning, double row, torque tube, airframe, antifriction, sealed 2. APPLICABLE DOCUMENTS The following publications form a part of this document to the extent specified herein. The latest issue of SAE publications shall apply. The applicable iss
8、ue 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 precedence. Nothing in this document, however, supersedes applicable laws and regulations u
9、nless a specific exemption has been obtained. SAE INTERNATIONAL AS8914B Page 2 of 12 2.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or +1 724-776-4970 (outside USA), www.sae.org. AS21431 Bearing, Rol
10、ler, Self-Aligning, Single Row, Anti-Friction, Sealed, -65 to 350 F, Type I AS28913 Bearing, Roller, Self-Aligning, Double Row, Airframe, Anti-Friction, Sealed, Type II AS28914 Bearing, Roller, Self-Aligning, Double Row, Airframe, Anti-Friction, Sealed, Type III AS28915 Bearing, Roller, Self-Alignin
11、g, Double Row, Torque Tube, Airframe, Anti-Friction, Sealed, Type IV AMS-QQ-P-416 Plating, Cadmium (Electrodeposited) AMS2417 Plating, Zinc-Nickel Alloy 2.2 U.S. Government Copies of these documents are available online at http:/quicksearch.dla.mil. MIL-DTL-197 Packaging of Bearings, Antifriction, A
12、ssociated Parts and Subassemblies MIL-PRF-81322 Grease, Aircraft, General Purpose Wide Temperature Range MIL-PRF-23827 Grease, Aircraft and Instrument, Gear and Actuator Screw, NATO Code Number G-354 MIL-STD-130 Identification Marking of U.S. Military Property MIL-STD-810 Environmental Engineering C
13、onsiderations and Laboratory Tests MIL-STD-1916 DoD Preferred Methods for Acceptance of Product MIL-HDBK-831 Preparation of Test Reports 2.3 Other Publications Copies of these documents are available online at http:/webstore.ansi.org/ ANSI/ASME B46.1 Surface Texture, Surface Roughness, Waviness, and
14、 Lay 3. REQUIREMENTS 3.1 Qualification Bearings furnished under this standard shall be products which are authorized by the qualifying activity for listing on the applicable Qualified Products List (QPL-AS8914) at the time of award of contract (see 4.3 and 6.3). See Qualified Products Database (QPD)
15、 at http:/quicksearch.dla.mil/. 3.1.1 Product Change Any change in product design, including raceway geometry or dimensions, rolling element dimensions, rolling element quantity, seals, materials or plant location shall be reported to the qualifying activity and will require requalification of the p
16、roduct to an extent determined by the qualifying activity. Any other specific changes which must be brought to the TXDOLILQJDFWLYLWVDWWHQWLRQZLOOEHLGHQWLILHGLQWKH qualification notification letter. SAE INTERNATIONAL AS8914B Page 3 of 12 3.1.2 Product Manufacture The bearing manufacturer shall be cap
17、able of performing the majority of manufacturing operations in-house, but may subcontract these operations at its option. Component inspection shall be performed at the plant listed on the QPD If PDQXIDFWXULQJRSHUDWLRQVDUHSHUIRUPHGLQPRUHWKDQRQHSODQWWKHPDQXIDFWXUHUVDGGLWLRQDOSODQW V VKDOOEHUHSRUWHGWR
18、the qualifying activity and will be listed accordingly on the QPD. The manufacturer is responsible for meeting all requirements of the standard and for the quality of the end product, whether it is manufactured totally in-house or some of the operations are performed by a subcontractor. Inherent in
19、the responsibility for the end product is the responsibility to YHULIWKDWWKHVXEFRQWUDFWRUVSURFHVVHVPHHWVWDQGDUGUHTXLUHPHQWV . A change in subcontractor need not be reported to the qualifying activity unless specifically identified in the qualification notification letter. (NOTE: Bearings partly or c
20、ompletely manufactured in foreign countries shall be subject to the laws and procurement regulations pertaining to acquisition of foreign made products.) 3.2 Materials Material used to manufacture the bearing and its components shall conform to the applicable AS. 3.3 Design and Construction Only fac
21、tory new bearings conforming to requirements specified herein shall be used. 3.3.1 Hardness The rings and rollers shall have a hardness of 60 to 65 on the Rockwell C scale. They shall be uniformly hardened. 3.3.2 Surface Roughness 3.3.2.1 Sides of Inner Ring The sides of the inner ring shall have a
22、smooth, machined finish that will not cut nor score the adjacent clevis or fitting, equal to or better than the surface roughness as specified on the applicable AS. 3.3.2.2 Faces of Raceway Faces on inner and outer races shall conform to ANSI B46.1 and shall have a smooth finish that will not cut or
23、 score the fitting or clevis abutting the race face as specified on the applicable AS. 3.3.2.3 Finish Except when made of corrosion-resistant steel, the face and the outside diameter surfaces, excluding the bore, shall be plated. Plating shall be in accordance with AMS-QQ-P-416 or AMS2417 as specifi
24、ed on the applicable AS. 3.3.3 Seals Seals shall be of the contact type. The material shall be determined by the manufacturer to provide retention of lubricant and exclusion of environmental substances. 3.3.4 Lubrication Provisions Holes and channels shall be provided for lubrication as shown on the
25、 applicable AS. 3.3.5 Retainers Roller retainers or separators, when applicable, shall be made of steel or copper alloy as specified on the applicable AS. SAE INTERNATIONAL AS8914B Page 4 of 12 3.3.6 Lubrication The bearings shall be filled with grease conforming to MIL-PRF-81322 or MIL-PRF-23827, T
26、ype I or Type II so that at least 80% of the bearing void shall be filled. Bearings shall not have been lubricated more than 36 months prior to date of delivery. The bearings shall be thoroughly cleaned and dried before being lubricated. 3.3.7 Stability The bearing components shall be dimensionally
27、stable for operation from -67 to +250 F. 3.4 Performance 3.4.1 Radial Strength 3.4.1.1 Radial Limit Load Rating The bearings shall have a radial limit load rating of not less than the values specified on applicable AS and shall be tested as specified in 4.5.6. 3.4.1.2 Radial Fracture Load The minimu
28、m static fracture capacity shall be not less than 1-1/2 times the radial limit load rating specified on the applicable AS and shall be tested as specified in 4.5.7. 3.4.1.3 Dynamic Load Rating The bearings shall have a radial dynamic load rating of not less than the values specified on the applicabl
29、e AS. The average life shall be 10,000 cycles oscillating through an arc of 90 degrees and shall be tested as specified in 4.5.10. 3.4.2 Axial Strength 3.4.2.1 Axial Limit Load Ratings The bearings shall have an axial limit load rating of not less than the values specified on the applicable AS and s
30、hall be tested as specified in 4.5.8. 3.4.2.2 Axial Fracture Load The minimum static fracture capacity shall be not less than 1-1/2 times the axial limit load rating values specified on the applicable AS and shall be tested as specified in 4.5.9. 3.4.3 Radial Play Radial play, measured before and af
31、ter the radial and axial limit load rating tests (4.5.6 and 4.5.8), shall be as specified on the applicable AS and shall be measured as specified in 4.5.11. 3.4.4 Axial Play Axial play, measured before and after the radial and axial limit load rating tests, (4.5.6 and 4.5.8), shall be as specified a
32、s a function of the contact angle and the radial play, and shall be measured as specified in 4.5.12. 3.5 Dimensions and Tolerances Dimensions and tolerances shall be in accordance with the applicable AS and shall be measured as specified in 4.5.15 and 4.5.16. SAE INTERNATIONAL AS8914B Page 5 of 12 3
33、.6 Weight The weight of the bearings shall be as specified on the applicable AS. 3.7 Identification of Product The bearings shall be permanently and legibly marked for identification in accordance with MIL-STD-130. The identification data applied to the bearing shall be as follows: a. Complete AS nu
34、mber b. 0DQXIDFWXUHUVQDPHRUWUDGHPDUNPDQXIDFWXUHUVSDUWQXPEHURSWLRQDO c. 0DQXIDFWXUHUVORWQXPEHU 3.8 Workmanship All details of workmanship shall be of sufficient high grade to insure satisfactory operation and service life. Parts shall not contain sharp edges, burrs, loose chips, dirt, or other foreig
35、n matter. 3.9 AS Sheets The individual item requirements shall be as specified herein and in accordance with the applicable AS sheet. In the event of any conflict between the requirements of this standard and the AS sheet, the latter shall govern. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility f
36、or Inspection Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all inspection requirements (examinations and tests) as specified herein. Except as otherwise specified in the contract or purchase order, the contractor may use their own
37、 or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in this standard where such inspections are deemed necessary to ensure supplies a
38、nd services conform to prescribed requirements. 4.1.1 Responsibility for Compliance All items shall meet all requirements of Sections 3 and 5. The inspection set forth in this standard shall become a part of thHFRQWUDFWRUVRYHUDOOLQVSHFWLRQVVWHPRUTXDOLWSURJUDP . The absence of any inspection requirem
39、ents in the standard shall not relieve the contractor of the responsibility of ensuring that all products or supplies submitted to the Government for acceptance comply with all requirements of the contract. Sampling inspection, as a part of manufacturing operations, is an acceptable practice to asce
40、rtain conformance to requirements, however, this does not authorize submission of known defective material, either indicated or actual, nor does it commit the Government to accept defective material. 4.2 Classification of Inspection and Tests The inspection requirements specified herein are classifi
41、ed as follows: a. Qualification inspection b. Quality conformance inspection SAE INTERNATIONAL AS8914B Page 6 of 12 4.3 Qualification Inspection 4.3.1 Sampling Instruction Twenty-five bearings of each AS dash number for which qualification is desired shall be tested. 4.3.2 Test Reports The contracto
42、r shall prepare a test report in accordance with MIL-HDBK-831 (see 6.2.1). 4.3.3 Qualification Tests The qualification inspection shall consist of all the tests specified under 4.5. The tests shall be conducted in the order specified in Table 1. Table 1 - Qualification inspection samples Examination
43、 or test Sample number Test paragraph 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Examination of product X X X X X X X X X X X X X X X X X X X X X X X X X 4.5.1 Preservation of product packing and marking X X X X X X 4.6 Hardness X X X 4.5.2 Surface roughness X X X 4.5.3 Platin
44、g X X X 4.5.4 Lubrication X X X 4.5.5 Radial play X X X X X 4.5.11 Axial play X X X X X 4.5.12 Stabilization X X X 4.5.14 Seals X X X 4.5.13 Radial limit load X X X 4.5.6 Radial fracture load X X X 4.5.7 Axial limit load X X X 4.5.8 Axial fracture load X X X 4.5.9 Radial dynamic load X X X X X X X X
45、 X X 4.5.10 4.4 Quality Conformance Inspection 4.4.1 Lot The lot definition, formation, and size shall be in accordance with MIL-STD-1916. 4.4.2 Sampling 7KH VDPSOH EHDULQJV VKDOO EH VHOHFWHG LQ DFFRUGDQFH ZLWK WKH WDEOH WLWOHG 0DVWHU 7DE OH IRU 1RUPDO DQG 7LJKWHQHG,QVSHFWLRQ 6LQJOH 6DPSOLQJ RI 0,/ -STD-1916, at inspection level II. The lots shall be accepted or rejected in accordance with acceptable quality level (AQL) of 1.0% defective on the basis of the tests specified in 4.4.3. SAE INTERNATIONAL AS8914B Page 7 of 12 4.4.3 Quality Conformance Inspection Tests The quality confor
