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 reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2011 SAE International All rights reserved. No part of this publication ma
3、y 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 (outside US
4、A) 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/AS81935CAEROSPACESTANDARDAS81935 REV. C Issued 1997-11 Revised 2011-06Superseding AS81935B Bear
5、ings, Plain, Rod End, Self-Aligning, Self-Lubricating, General Specification For (-65 to +325 F) RATIONALEChanges to this document are the result of a five year review, updating supporting specifications called out within the document. Provisions for the CRES series have been added (AS81935/6, /7, 8
6、/ and /9). Marking and Packing note updated (paragraph 5.2) to comply with changes made to MIL-DTL-197. Clarified QPL is now a QPD maintained on the ASSIST website. 1. SCOPEThis specification covers plain rod end bearings, corrosion resistant steel (CRES) or alloy steel, which are self-aligning and
7、self-lubricating by incorporating polytetrafluoroethylene (PTFE) in a liner between the ball and race for use in the temperature range -65 to +325 F (-54 to +163 C). 1.1 Classification: Bearings shall be of the following classes, as specified (see 3.5.4): Class 1 - Externally threaded shank Class 2
8、- Internally threaded shank 2. APPLICABLE DOCUMENTS The following documents form a part of this document to the extent 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
9、 event of conflict between the text of this document and references citied herein (except for associated detail specifications, specification sheets or AS standards), the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a sp
10、ecific exemption has been obtained. 2.1 SAE Publications Available from SAE , 400 Commonwealth Drive, Warrendale, PA 15096-0001, Telephone: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.orgAMS-QQ-P-416 Plating, Cadmium (Electrodeposited). AMS2700 Passivation of Corrosio
11、n Resistant Steels AMS2750 Pyrometry AS14101 Bearing, Plain, Self-Lubricating, Self-Aligning, Low Speed, Narrow, Grooved Race, -65 to +325 F. SAE AS81935C Page 2 of 16AS14103 Bearing, Plain, Self-Lubricating, Self-Aligning, Low speed, Wide, Grooved Race, -65 to +325 F. AS8879 Screw Threads, Controll
12、ed Radius Root With Increased Minor Diameter, General Specification AS81820 Bearing, Plain, Self-Aligning, Self-Lubricating, Low Speed Oscillation. AS81935/1 Bearing, Plain, Rod End, Self-Aligning, Self-Lubricating, Wide, Externally Threaded, -65 to +325 F. AS81935/2 Bearing, Plain, Rod End, Self-Al
13、igning, Self-Lubricating, Wide, Internally Threaded, -65 to +325 F. AS81935/3 Locking Device, Rod End. AS81935/4 Bearing, Plain, Rod End, Self-Aligning, Self-Lubricating, Narrow, Externally Threaded, -65 to +325 F. AS81935/5 Bearing, Plain, Rod End, Self-Aligning, Self-Lubricating, Narrow, Internall
14、y Threaded, -65 to +325 F. AS81935/6 Bearing, Plain Rod End, Self Aligning, Self Lubricating, Wide, Externally Threaded, Steel, Corrosion Resistant (CRES), -65 to + 325 F. AS81935/7 Bearing, Plain Rod End, Self Aligning, Self Lubricating, Wide, Internally Threaded, Steel, Corrosion Resistant (CRES),
15、 -65 to + 325 F. AS81935/8 Bearing, Plain Rod End, Self Aligning, Self Lubricating, Narrow, Externally Threaded, Steel, Corrosion Resistant (CRES), -65 to + 325 F. AS81935/9 Bearing, Plain Rod End, Self Aligning, Self Lubricating, Narrow, Internally Threaded, Steel, Corrosion Resistant (CRES), -65 t
16、o + 325 F. 2.2 ASQ Publications Available from American Society for Quality, 600 North Plankinton Avenue, Milwaukee, WI 53203, Tel: 800-248-1946 (United States or Canada) or +1-414-272-8575 (International), www.asq.org.ASQ Z1.4 Sampling Procedures and Tables for Inspection by Attributes 2.3 ASME Pub
17、lications Available from American Society of Mechanical Engineers, 22 Law Drive, P.O. Box 2900, Fairfield, NJ 07007-2900, Tel: 973-882-1170, www.asme.orgASME B46.1 Surface Texture (Surface Roughness, Waviness and Lay) ASME Y14.100 Engineering Drawing Practices ASME Y14.24 Types and Applications of E
18、ngineering Drawings ASME Y14.34 Associated Lists ASME Y14.35M Revision of Engineering Drawings and Associated Documents 2.4 ASTM Publications Available from the ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org.ASTM D3951 Prac
19、tice for Commercial Packaging ASTM E1444 Inspection, Magnetic Particle ASTM A967 Citric Acid Passivation SAE AS81935C Page 3 of 162.5 U.S Government Publications Available from Document Automation and Production Service (DAPS), Building 4D, 700 Robbins Avenue, Philidelphia, PA 19111-5094, Tel: 215-6
20、97-6257, https:/assist.daps.dla.mil/quicksearch/MIL-STD-129 Military Marking for Shipment and Storage MIL-STD-130 Identification Marking of U. S. Military Property MIL-DTL-197 Packaging of Bearings, Anti-friction, Associated Parts and Subassemblies MIL-HDBK-1599 Bearings, Control System Components a
21、nd Associated Hardware Used in the Design and Construction of Aerospace Mechanical Systems and Subsystems. 2.6 Uniform Classification Committee Application for copies should be addressed to the Uniform Classification Committee, 202 Chicago Union Station, Chicago, IL 60606 Uniform Classification Comm
22、ittee Uniform Freight Classification Rules 3. REQUIREMENTS 3.1 Specification 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 specification and the AS sheet, the latter s
23、hall govern. 3.2 Qualification Rod end bearings furnished under this specification shall be products which are authorized by the qualifying activity for listing on the applicable Qualified Products List at the time set for opening of bids (see 4.4, 6.3 and 6.3.1). 3.2.1 Product Design Change Any cha
24、nge in product design, description, materials or processing procedures will require requalification of the product to an extent determined by the qualifying activity. For the purposes of this specification “change in processing procedures” means a change in any of the following: (1) the company perf
25、orming rod end body machining, (2) the company performing rod end body heat treating, or (3) the company performing thread forming. 3.3 Bearing Cartridge The bearing cartridge used in these rod ends shall be in accordance with AS14101 or AS14103, shall be qualified to AS81820 and shall have been sub
26、jected to and passed the Quality Conformance Tests of Section 4.4 of AS81820. If the bearing cartridge used in these rod ends was produced by another manufacturer, the Department of Defense regulations and policies regarding rebranding of products shall apply. These regulations state that when a com
27、pany wishes to supply a qualified product carrying its own brand designations, but which is manufactured by another firm, the manufacturer shall be requested by the company to certify that the company is authorized to rebrand and distribute the product with its own brand designation. Additional info
28、rmation about these regulations may be obtained from Naval Air Systems Command, Code 435400A, 48110 Shaw Road Unit 5, Patuxent River, MD 20670-1906.SAE AS81935C Page 4 of 163.4 Materials The rod end body materials shall be in accordance with the applicable AS sheet. 3.4.1 Cadmium Plating The alloy s
29、teel rod end bodies (AS81935/1, AS81935/2, AS81935/4 or AS81935/5) shall be cadmium plated in accordance with AMS-QQ-P-416, Type II, Class 2. The plated bodies shall be heated to a temperature of 375 25 F within 4 hours after plating but before the chromate treatment and magnetic particle inspection
30、, and held at this temperature for a minimum of 3 hours, after which the bodies shall be allowed to cool normally at room temperature. 3.4.2 Passivation The corrosion resistant steel (CRES) rod end bodies (AS81935/6, AS81935/7, AS81935/8 or AS81935/9) shall be passivated in accordance with AMS2700,
31、Method 1 (Nitric Acid) or Method 2 (Citric Acid) or passivate in accordance with ASTM A967, citric acid passivation, using CITRIC 1, CITRIC 2, or CITRIC 3 solutions. A permissible method for determining passivity is the copper sulfate test defined in ASTM A967 or AMS2700. 3.4.3 Lubrication Initial g
32、rease or oil lubrication of the bearing cartridge will not be permitted. Use of anti-fretting material between the bearing cartridge and the rod end body is permitted. 3.5 Design and Construction The design of the rod end bearing shall conform to the requirements of AS81935/1, AS81935/2, AS81935/4,
33、AS81935/5, AS81935/6, AS81935/7, AS81935/8 or AS81935/9. Construction shall be such that all relative motion will be between the liner and ball. Except as otherwise specified, the details of the working parts shall be optional. 3.5.1 Dimensions and Tolerances Dimensions and tolerances shall be as sp
34、ecified on the applicable AS sheet. Dimensions not shown shall be at the option of the manufacturer. 3.5.1.1 Alloy Steel Body Rod end spherical head geometry shall conform to the dimensional requirements of AS81935/1, AS81935/2, AS81935/4 or AS81935/5. The manufacturer has the option of qualifying e
35、ither a “Conical Head“ or “Elliptical (Olive) Head“ as referenced by Figure 1. The manufacturer shall utilize the head geometry used on the original qualification lot and shall not deviate without first obtaining approval from the Naval Air Systems Command, Code 435400A, 48110 Shaw Road, Unit 5, Pat
36、uxent River, MD 20670-1906. 3.5.1.2 Corrosion Resistant Steel (CRES) Body Rod end spherical head geometry shall conform to the dimensional requirements of AS81935/6, AS81935/7, AS81935/8 or AS81935/9. The head geometry is as specified in the applicable AS sheet.3.5.2 Surface Texture Surface textures
37、 shall be in accordance with the applicable AS sheet and ASME B46.1. Rod end bearings shall be free of any defects which may be detrimental to satisfactory installation, performance or bearing life, as defined by this specification.SAE AS81935C Page 5 of 163.5.3 Hardness Each rod end body shall be t
38、ested for hardness as specified in 4.7.5. Alloy steel rod ends shall be tested after heat treatment but before plating, corrosion resistant steel (CRES) rod ends to be tested after heat treat. Only rod end bodies with Rockwell readings in the range allowed by the applicable AS sheet shall be accepta
39、ble. Conical Head Elliptical or Olive Head FIGURE 1 HEAD GEOMETRY 3.5.3.1 Hardness Sampling Rod end bodies, heat treated and tempered in furnaces qualified and maintained in accordance with AMS2750, may be sample hardness tested in accordance with ASQ Z1.4, General Inspection Level II, AQL 1.0, prov
40、ided the ten (10) previous lots of each part number were found acceptable to 100% hardness testing. 3.5.4 Threads 3.5.4.1 Class 1 rod ends (External Thread) Dimensions, form and contour shall conform to AS8879. Threads shall be rolled after heat treatment. Rerolling of threads to correct dimensional
41、 deficiencies shall not be permitted. 3.5.4.2 Class 2 rod ends (Internal Thread) Threads shall conform to AS8879. 3.5.5 Magnetic Particle Inspection All rod end bodies shall be examined by magnetic particle inspection as specified in 4.7.6.1. Any rod end bodies having discontinuities equal to or exc
42、eeding the limitations specified herein shall be rejected. Care must be exercised to avoid confusing cracks, as described herein, with other discontinuities. SAE AS81935C Page 6 of 163.5.5.1 Cracks Rod end bodies shall be free of cracks in any direction or location. A crack is defined as a clean cry
43、stalline break passing through the grain or grain boundary without the inclusion of foreign elements. 3.5.5.2 Laps and Seams Rod end bodies may possess laps and seams, except in locations specified in 3.5.5.4 and 3.5.5.5. Except as noted, the depths shall not exceed the amounts specified in Table 1.
44、 A lap is a surface defect appearing as a seam caused by folding over hot metal fins or sharp corners and then rolling or forging them into the surface, but not welding them. A seam is an unwelded fold or lap which appears as an opening in the raw material as received from the source. TABLE 1 - DISC
45、ONTINUITY DEPTHS 1/Bearing Size -04 and -05 -06 -07 -08 thru 16 Seam Depth (inch) (maximum)0.005 0.006 0.007 0.008 1/ Depth of discontinuity shall be measured normal to the surface at the point of greatest penetration. 3.5.5.3 Inclusions Rod end bodies shall show no evidence of surface or subsurface
46、 inclusions at the thread root, hoop-to-shank fillet or in the 3 to 6 to 9 oclock positions of the hoop (see Figure 2) when inspected in accordance with 4.7.6. Small inclusions in other parts of the rod end body not indicative of unsatisfactory material quality, shall not be cause for rejection. 3.5
47、.5.4 Hoop and Hoop-to-shank Fillet Discontinuities (seams and folds) The rod end body shall not have seams or folds in the 3 to 6 to 9 oclock positions of the hoop (see Figure 2) or in the hoop-to-shank fillet. Seams or folds in the 9 to 12 to 3 oclock positions of the hoop not exceeding the limits
48、of Table 1 shall not be cause for rejection. FIGURE 2 - HOOP POSITION DESIGNATIONS SAE AS81935C Page 7 of 163.5.5.5 Thread Discontinuities (Laps, Seams and Surface Irregularities): Threads shall have no multiple or single laps at the root or on the sides (Figure 3), except that laps are permissible
49、at the crest which do not exceed 25% of basic thread depth, and on the sides outside the pitch diameter (see Figure 4). Deviation from the thread contour is permissible at the crest of the thread as shown in Figure 4. The incomplete thread at each end of the thread may also deviate from contour. Note: For limits see 3.5.5.2 and 3.5.5.3. FIGURE 3 - NONPERMISSIBLE LAPS, SEAMS AND INCLUSIONS Note: For limits see 3.5.5.5. FI
