SAE ARP 5483 1A-2012 Rolling Element Bearing No-Load Torque Test《滚动轴承的空载转矩试验》.pdf

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 there

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4、0 (outside USA) Fax: 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/ARP5483/1A AEROSPACE RECOMMENDED PRACTICE ARP5483/1 REV. A Issued 2005-09 Revised

5、 2012-12 Superseding ARP5483/1 Rolling Element Bearing No-Load Torque Test RATIONALE ARP5483/1A is a five-year review with only minor editorial changes. 1. SCOPE This test method outlines the recommended procedure for performing the no-load rotational starting torque test on airframe rolling bearing

6、s. Bearings covered by this test method shall be antifriction ball bearings and spherical roller bearings. 2. REFERENCES 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 i

7、ssue 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

8、 unless a specific exemption has been obtained. 2.1.1 ISO Publications Available from American National Standards Institute, 25 West 43rd Street, New York, NY 10036-8002, Tel: 212-642-4900, www.ansi.org. ISO 10012 Measurement management systems - Requirements for measurement processes and measuring

9、equipment ISO/IEC 17025 General requirements for the competence of testing and calibration laboratories SAE ARP5483/1A Page 2 of 5 2.2 Definitions Starting torque is defined as the rotational force required to initiate rotation of one bearings raceway relative to the other raceway. 3. GENERAL REQUIR

10、EMENTS 3.1 Test Apparatus 3.1.1 Torque Tester The testing device shall be capable of measuring the starting rotational torque within the bearing, without applying external radial or axial loads. The torque shall be applied either using electronically driven torque measuring device that starts from a

11、 static state and slowly increases torque until rotation occurs or applied manually using a torque watch. The gage should be accurate to within 10% of the measured value. A simple manual testing device is shown in Figure 1. 3.1.2 (Alternative Method) In the event that the torque apparatus described

12、in 3.1.1 is unavailable, it is permissible to use a force gage and a string (see 4.2). Torque values properly obtained from any of these methods are acceptable. 3.1.3 Calibration Calibration of the torque tester shall be in accordance with ISO/IEC 17025 or ISO 10012, and the manufacturers specificat

13、ions. Calibration of the torque tester shall be within limits at the time of the test. 3.1.4 Bearing Adapter The bearing holding adapter shall hold the inner ring of the bearing tightly enough to turn it without causing distortion. The inner bearing ring may be held by the wedging action of a relati

14、vely soft material, or clamping of its faces. The bearings adapter shall be directly attached to the torque tester. A simple adapter, which may be used for multiple bore sizes, is shown in Figure 1. 3.1.5 Equipment Variation Variations in the apparatus to test and hold the bearing are permissible pr

15、oviding the procuring activity is provided with sufficient calibration data to verify the accuracy of the test conditions and results. 3.2 Test Specimen 3.2.1 Disposition of Specimen Bearings having acceptable torque levels and that remain otherwise undamaged after completion of this test are suitab

16、le for delivery into service as this test is considered to be nondestructive. If any other test should be required, then the suitability for delivery of specimen will be based on those other tests. SAE ARP5483/1A Page 3 of 5 FIGURE 1 4. DETAILED REQUIREMENTS 4.1 Procedure for No-Load Rotational Star

17、ting Torque 4.1.1 Rotate one of the two bearing rings at least 4 revolutions in both directions to distribute the lubricant evenly. 4.1.2 Align bearing ring faces so they are perpendicular to the bearing adapters axis and push lightly onto the adapter until wedging action just holds the bearing on t

18、he adapter. (See 4.2 for alternative method.) 4.1.3 Apply torque either using a power driven torque measuring device which gradually increases the torque from zero until rotation starts, or manually using a torque gauge with the bearing at room temperature. A start is registered when the rotating ra

19、ceway member starts and maintains rotation through a minimum 60 degree arc. 4.1.4 Measure the torque a minimum of three times in both rotational directions. The highest value obtained is considered the starting torque of that bearing. SAE ARP5483/1A Page 4 of 5 4.2 (Alternative technique, force gage

20、 with string) To use this technique, fasten one end of a string to the O.D. of the bearing with tape or a similar means. Wrap the string circumferentially along the bearing O.D. for one or more complete revolutions. Attach the free end of the string to an appropriately sensitive force gage. The gage

21、 should be accurate to within 10% of the measured value. Lightly restrain the inner ring from rotating and slowly pull on the spring scale until the outer ring starts to rotate. Measure the force (ounce or pound) to rotate the outer ring a minimum of three times in both rotational directions and rec

22、ord the highest value. The torque is then calculated by multiplying the radius of the bearing (centerline to outside diameter) by the highest force to yield the torque (typical units: in-oz, in-lbf, or ft-lbf). 4.3 If a bearing fails to pass the specification limit, this test may be repeated twice,

23、beginning with 4.1.1. If bearing still fails after three attempts, it must be reworked to conformance or rejected. 5. DOCUMENTATION 5.1 Test Parameters The following parameters shall be specified in the individual specification or standard: a. Failure criteria 5.2 Test Data The following information

24、 shall be recorded in report format: 5.2.1 Bearing Description a. Part Number b. Lot Identification c. Manufacturer 5.2.2 Test Equipment a. Equipment Name, Model number, and Serial Number b. Calibration Data c. Operator d. Date tested 5.2.3 Results a. Requirements b. Measured values c. Measurement U

25、nits 5.2.4 Failures or Problems a. Description of failure b. Corrective action taken c. Description of any malfunction resulting in an invalid or interrupted test. SAE ARP5483/1A Page 5 of 5 6. NOTES 6.1 Intended Uses This test method is intended to provide a standard method of evaluating the starti

26、ng rotational torque of bearings without loading the bearings. 6.2 Method of Reference This test method is intended to be referenced in general and in detailed specifications, standards or drawings for airframe bearings. Specific test and data requirements are given in the applicable document. The f

27、ollowing note shall be used to reference this test method: NOTE: The bearings shall be tested in accordance with ARP5483/1. The slash number refers to the specific test method. 6.3 A change bar (l) located in the left margin is for the convenience of the user in locating areas where technical revisi

28、ons, 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 SAE SUBCOMMITTEE ACBG-2, ROLLING ELEMENT COMMITTEE OF AIRFRAME CONTROL BEARINGS GROUP (ACBG)