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
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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/ARP5483/5AAEROSPACERECOMMENDEDPRACTICEARP5483/5 REV. A Issued 2007-10 Revised 2013-0
5、7 Superseding ARP5483/5 Rolling Element Bearing Test Method for Radial Limit and Fracture Load Testing RATIONALEARP5483/5A is being revised in association with the five-year document review to clarify test procedures and correct typographical errors in the text. 1. SCOPE This test method outlines th
6、e recommended procedure for performing static radial limit and ultimate load tests on rolling element bearings used in airframe applications. Bearings covered by this document shall be antifriction ball bearings and spherical roller bearings in either annular or rod end configurations. 2. REFERENCES
7、 2.1 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 issue of other publications shall be the issue in effect on the date of the purchase order. In the event of conflict betw
8、een 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 unless a specific exemption has been obtained. 2.1.1 ASTM Publications Available from ASTM International, 100 Barr Harb
9、or Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org.ASTM E4 Standard Methods of Verification of Testing Machines ASTM E83 Method of Verification and Classification of Extensometers 2.1.2 ANSI/NCSL Publications National Conference of Standards Laboratories, 2995
10、 Wilderness Place, Suite 107, Boulder, CO 80301-5404, Tel: 303-440-3339, www.ncsli.org.ANSI/NCSL Z540-3 Calibration Laboratories and Measuring and Test Equipment - General Requirements SAE ARP5483/5A Page 2 of 6 2.1.3 ISO Publications Available from International Organization for Standardization, 1,
11、 rue de Varembe, Case postale 56, CH-1211 Geneva 20, Switzerland, Tel: +41-22-749-01-11, www.iso.org.ISO 10012 Quality Assurance Requirements for Measuring Equipment 2.2 Definitions RADIAL LIMIT LOAD: The maximum radial load which, when applied and released, does not affect the smoothness of operati
12、on of the test bearing. The load for each bearing size is specified in the applicable document. This load is the maximum load that should be applied to the bearing in application. RADIAL STATIC FRACTURE LOAD: The radial load equal to 1.5 times the Radial Limit Load, unless otherwise specified in the
13、 applicable document. Bearings subjected to this load shall be capable of being turned by hand and shall have no fractured components. BRINELL: Permanent deformation of a bearing raceway caused by a rolling element. Brinelling occurs when a bearing is subjected to a static load which causes the stre
14、ss in the ball contact area to exceed the yield stress of the material. 3. GENERAL REQUIREMENTS 3.1 Test Apparatus 3.1.1 Test Machine The fixture shall be mounted onto a test machine capable of applying the required load at a controlled rate. The calibration system for the machine shall conform to A
15、NSI/NCSL Z540-1 and ISO 10012. Its accuracy shall be verified every 12 months by a method complying with ASTM E4. The limit and ultimate loads of the test bearing shall be within the loading range of the testing machine as defined in ASTM E4. 3.1.2 Test Fixtures Dimensions of the test fixtures shall
16、 provide sufficient section thickness to assure rigid support of the test specimen when subjected to the fracture load. For threaded rod end bearings, the shank shall be mated with a fixture allowing a thread engagement of at least 1-1/2 times the thread pitch diameter. 3.1.3 Material The mounting a
17、pparatus shall be fabricated from steel and heat treated to a hardness of 40 HRC minimum. The test pin shall be fabricated from high strength tool steel or equivalent and heat treated to a hardness of 50 HRC minimum. 3.1.4 Mounting Fit Clearance between the mounting bolt and the inner ring shall be
18、0.0000 to 0.0010 inch or as specified in the applicable document. Clearance between the fixture and the outer ring shall be 0.0000 to 0.0010 inch or as specified in the applicable document.NOTE: The above approach for mounting the test bearing produces generally repeatable results by promoting stiff
19、 structural performance. The use of thin section fixtures or looser fits may result in significantly different results. 3.1.5 Measuring Equipment Inspection equipment shall be capable of measuring an indentation in the inner or outer ring raceway that is 0.0005 times the rolling element diameter. SA
20、E ARP5483/5A Page 3 of 6 3.2 Specimen 3.2.1 Bearings for Radial Load Tests Bearings shall be tested as received. Only new bearings shall be used. 3.2.2 Quantity The number of test specimens shall be as specified in the referencing document. 3.2.3 Disposition of Test Bearings Bearings tested per this
21、 method shall not be put into service. 4. DETAILED REQUIREMENTS 4.1 Radial Limit Load Test 4.1.1 Pre-Test Checks Before application of limit load, the test bearing shall be evaluated as specified in the applicable document regarding parameters such as internal clearance and rotational torque. These
22、measurements are required to establish data whereby failure may be determined. This may be done with the test specimen in the fixtures. It is permissible to make evaluations in separate fixtures providing the internal bearing clearance is not changed by mounting. 4.1.2 Testing Mount the test bearing
23、 as shown in Figure 1. The test bearing and fixtures shall be installed in a loading device such as a tensile test machine and the load gradually increased to the radial limit load specified in the applicable document at a rate of 1% of the specified load per second. The load shall be held for not l
24、ess than 1 minute and during this time the applied load shall not drop below the specified load. After 1 minute has passed, gradually release the load at a rate 1% of the specified load per second. 4.1.3 Evaluation The test specimens shall be evaluated after the limit load test has been performed. T
25、he pass/fail criteria are specified in the applicable document. Typically the bearing is rotated with a 5 pound weight applied in the same direction as the static load and the pass criteria is that there shall be no perceptible change in the smoothness of the bearing. Another method of evaluation is
26、 to disassemble the test bearing and measure the depth of the brinell markings on the inner and outer raceways. The typical passing criterion for this inspection is that the maximum depth of any brinell mark shall not exceed 0.0005 times the diameter of the rolling elements. 4.2 Radial Static Fractu
27、re Load 4.2.1 Pre-Test Checks Before application of fracture load, the test bearing shall have successfully passed the limit load test. 4.2.2 Testing Using the same apparatus from 4.1.2, a radial load of 1.5 times the limit load shall be applied at a rate of 1% of the specified load per second and h
28、eld steady for a minimum of 1 minute at full load before being released at a rate of 1% of the specified load per second. SAE ARP5483/5A Page 4 of 6 FIGURE 1 - SCHEMATIC FOR RADIAL LIMIT/FRACTURE LOAD TEST 4.2.3 Evaluation The tested specimen shall be removed from the fixturing and inspected for fai
29、lure. The pass/fail criteria will be described in the applicable specification. The typical passing criteria are that the bearing shall be capable of being turned by hand and that there can be no evidence of fractured bearing components when disassembled and inspected. Additionally, the bearing ring
30、s can be magnetic particle inspected to ensure that there are no cracks as a result of testing. 5. NOTES 5.1 Intended Use This test method is intended to provide a means for evaluating the performance criteria of a bearing when subjected to the radial limit load and radial fracture load specified in
31、 the applicable document. 5.2 Method of Reference This test method is intended to be referenced in general and in detailed specifications, standards, and drawings for antifriction airframe bearings. Specific test and data requirements are given in the applicable document. The following note shall be
32、 used to reference this test method: NOTE: The bearings shall be tested in accordance with ARP5483/5. The slash number refers to the specific test method. SAE ARP5483/5A Page 5 of 6 5.3 Test Data 5.3.1 Test Parameters Specific test requirements are given in the applicable document. Test parameters t
33、o be recorded shall include the following as applicable: a. Blueprint dimensions for the test bearing b. Shaft and test fixture dimensions and configuration c. Radial Limit Load d. Radial Static Fracture Load 5.3.2 Data Requirements Specific requirements may be called out in the applicable specifica
34、tion. The following data shall be recorded as a minimum:a. Initial smoothness of the test bearings b. Smoothness after Limit Load Testing c. Depth of brinell markings if applicable d. Freedom of rotation of test bearing after Fracture Load Testing e. Results of checking for fractured components afte
35、r Fracture Load Testing f. Magnetic Particle Inspection results after Fracture Load Testing if applicable 5.3.3 Test Report The recorded data shall be summarized in report form and shall contain the following: 5.3.3.1 Bearing Description a. Bearing part number b. Lot identification number c. Manufac
36、turers identification d. Dated drawing completely describing the test bearing including the dimensions and materials 5.3.3.2 Test Equipment Description a. Model number of loading machine b. Serial number of loading machine c. Calibration date d. Description of fixtures or drawing/photograph SAE ARP5
37、483/5A Page 6 of 6 5.3.3.3 Measuring Equipment Description a. Model number b. Serial number c. Calibration date 5.3.3.4 Test Procedures and Results a. Procedure followed b. Data sheets c. All inspection results d. Any test malfunctions or interruptions and explanations. e. Certification of the data
38、presented and that no data has been omitted. 5.4 A change bar (l) located in the left margin is for the convenience of the user in locating areas where technical revisions, not editorial changes, have been made to the previous issue of this document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. PREPARED BY THE SAE AIRFRAME CONTROL BEARINGS GROUP (ACBG)
