1、 AEROSPACE STANDARD BEARING, BALL, AIRFRAME, ANTI-FRAME ANTI-FRICTION, EXTRA LIGHT DUTY, PRECISION CORROSION RESISTANT NITROGEN STEEL (CREN) AS21428/1 Copyright 2017 SAE International All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in
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3、S: http:/www.sae.org ISSUED2011-03REVISED2017-02THIRD ANGLE PROJECTION CUSTODIAN: ACBG REV.A FEDERAL SUPPLY CLASS 3110 AS21428/1 SHEET 1 OF 4 REV. A PROCUREMENT SPECIFICATION: AS7949 6$(7HFKQLFDO6WDQGDUGV%RDUG5XOHVSURYLGHWKDW7KLVUHport is published by SAEtoadvance thestate of technicaland engineerin
4、g sciences. The useof this report is entirely voluntary, and its applicability andsuitability for any particularuse, includingany patent infringement arisingtherefrom,is the solHUHVSRQVLELOLWRIWKHXVHUSAE reviews eachtechnical reportatleast every fiveyears at whichtime it may be revised, reaffirmed,
5、stabilized, or cancelled. SAE invites your written comments and suggestions.SAE values your input. To provide feedback on this Technical Report, please visit http:/standards.sae.org/AS21428/1A RATIONALE THIS DOCUMENT REVISION ADDS THE FULLY SUBSTANTIATED AMS5655 MATERIAL FOR THE RINGS AND THE HEAT T
6、REAT REQUIREMENT. THE LUBRICATION IS BEING REVISED FROM A TRADE NAME TO AN INDUSTRY AVAILABLE SPECIFICATION MIL-PRF-23827 TYPE 1. ZINC NICKEL PER AMS2417 WI/%(,1,PASSIVATION IN ACCORDANCE WITH AMS2700, METHOD 1 (NITRIC ACID) OPTION ADDED. CRES BALLS WILL BE ,1,&2(3 ALL RING AND BALL SURFACES SHALL B
7、E PASSIVATED IN ACCORDANCE WITH AMS2700, METHOD 1 (NITRIC ACID) OR METHOD 2 (CITRIC ACID), OR ASTM A 967, CITRIC I, II, OR III. AMS2700, METHOD 1, TYPE 8 SHALL NOT BE USED. 7. RADIAL INTERNAL CLEARANCE: .0001 TO .0005. 8. ECCENTRICITIES: RADIAL LATERAL INNER RING: .0008 MAXIMUM INNER RING: .0008 MAX
8、IMUM OUTER RING: .0008 MAXIMUM OUTER RING: .0008 MAXIMUM 9. MARKING: THE PART NUMBER SHALL BE SEQUENCED LEFT TO RIGHT WITHOUT SPACES WITH DESIGNATIONS IN THE FOLLOWING SEQUENCE: AS 21428/1 - 38 G P T = BEARING, BALL, AIRFRAME, ANTIFRICTION, EXTRA LIGHT DUTY, CREN, .6250 BORE, FILLED 80% MIN. WITH MI
9、L-PRF-23827 TYPE I (250 F MAX. TEMP.), PASSIVATED, CRES BALLS. BALL MATERIAL CODE (SEE REQUIREMENT 1) SURFACE TREATMENT CODE (SEE REQUIREMENT 6) LUBRICANT CODE (SEE REQUIREMENT 4) $6$6+180%(5 6(E TABLE 1) AEROSPACE SERIES AEROSPACE STANDARD (AS) PREFIX AEROSPACE STANDARD AS21428/1 SHEET 4 OF 4 REV.
10、A BEARING, BALL, AIRFRAME, ANTI-FRAME ANTI-FRICTION, EXTRA LIGHT DUTY, PRECISION CORROSION RESISTANT NITROGEN STEEL (CREN) NOTES NOTICE THIS DOCUMENT REFERENCES A PART WHICH CONTAINS CADMIUM AS A PLATING MATERIAL. CONSULT LOCAL OFFICIALS IF YOU +$9(48(67,216&21&(51,1*&$0,80686( 1. ALL DIMENSIONS ARE
11、 IN INCHES, UNLESS OTHERWISE SPECIFIED. 2. IN THE EVENT OF A CONFLICT BETWEEN THE TEXT OF THIS DOCUMENT AND REFERENCES CITED HEREIN, THE TEXT OF THIS STANDARD TAKES PRECEDENCE. 3. REFERENCED DOCUMENTS SHALL BE OF THE ISSUE IN EFFECT ON DATE OF INVITATION FOR BIDS. 4. REVISION INDICATOR: A CHANGE BAR
12、 (I) 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.
