1、AEROSPACE STANDARD COVER - ENGINE ACCESSORY DRIVE, SQUARE, 2.653 BOLT CIRCLE, AMS4490 (UNS M11910) AS3221Copyright 2012 SAE International All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanic
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3、2006-05 REVISED 2012-10THIRD ANGLE PROJECTION CUSTODIAN: E-25 REV.BFEDERAL SUPPLY CLASS 2995 AS3221SHEET 1 OF 2REV. BPROCUREMENT SPECIFICATION: NONESAE Technical Standards Board Rules provide that: “This report ispublishedby SAE toadvance thestate of technicalandengineering sciences. Theuse ofthis r
4、eport is entirely voluntary, andits applicability and suitability forany particular use,including any patent infringement arising therefrom, isthe soleresponsibilityofthe user.”SAE reviews eachtechnicalreport at least every five years at which time itmay berevised, reaffirmed, stabilized, orcancelle
5、d. SAE invites yourwrittencomments andsuggestions. SAE values your input. To provide feedbackon this Technical Report, please visit http:/www.sae.org/technical/standards/AS3221BRATIONALE ADD CLARIFICATION FOR DIMENSIONAL CONFORMANCE PRIOR TO PAINTING (NOTE 6). UPDATE REFERENCES AND FORMATS. FIGURE 1
6、 AEROSPACE STANDARD AS3221SHEET 2 OF 2REV. BCOVER - ENGINE ACCESSORY DRIVE, SQUARE, 2.653 BOLT CIRCLE, AMS4490 (UNS M11910) NOTES: 1. MATERIAL: MAGNESIUM, AMS4490, UNS M11910, (DIE CAST). MECHANICAL PROPERTIES: TENSILE STRENGTH; 34 ksi MIN, YIELD STRENGTH, 22.6 ksi MIN 2. HARDNESS: 52 HB MIN 3. EJEC
7、TOR PIN MARKS .003 MAX DEPTH PERMISSIBLE ON SURFACE A. 4. FLUORESCENT PENETRANT INSPECTION: ASTM E1417 / E1417M, TYPE 1, SENSITIVITY LEVEL 2. ACCEPTANCE CRITERIA AS3071. 5. SURFACE TEXTURE: SYMBOLS PER ASME Y14.36M. REQUIREMENTS PER ASME B46.1. UNLESS OTHERWISE SPECIFIED, SURFACES TO BE 125 MICROINC
8、HES Ra. 6. FINISH: UNLESS OTHERWISE SPECIFIED, GRAY ENAMEL AMS2510, EXCEPT PRIMER SHALL BE MIL- PRF-23377. DIMENSIONAL LIMITS APPLY BEFORE PAINTING. 7. DIMENSIONING AND TOLERANCING: ANSI Y14.5M-1982 (ASME PUBLICATION). 8. BREAK SHARP EDGES .003 TO .015 UNLESS OTHERWISE SPECIFIED. 9. DIMENSIONS IN IN
9、CHES. 10. COVERS SUITABLE FOR FLIGHT, SHIPMENT, AND STORAGE. 11. 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
10、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. AS AND AMS ARE SAE INTERNATIONAL PUBLICATIONS. ASME IS AN AMERICAN SOCIETY OF MECHANICAL ENGINEERS PUBLICATION. ASTM IS AN ASTM INTERNATIONAL PUBLICATION. MIL IS A U.S. MILITARY PUBLICATION.
