1、METRIC AEROSPACE STANDARD COVER - ENGINE ACCESSORY DRIVE, SQUARE, 127.28 BC, METRIC AMS4424 (UNS M11630) OR AMS4484 MA3454Copyright 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, ele
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3、991-10REAFFIRMED 2006-05 REVISED 2012-10THIRD ANGLE PROJECTION CUSTODIAN: E-25 REV.AFEDERAL SUPPLY CLASS 2995 MA3454SHEET 1 OF 2REV. APROCUREMENT SPECIFICATION: NONE SAE Technical Standards Board Rules provide that: “This report ispublishedby SAE toadvance thestate of technicalandengineering science
4、s. Theuse ofthis report 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, stab
5、ilized, orcancelled. SAE invites yourwrittencomments andsuggestions. SAE values your input. To provide feedbackon this Technical Report, please visit http:/www.sae.org/technical/standards/MA3454ARATIONALE ADD CLARIFICATION FOR DIMENSIONAL CONFORMANCE PRIOR TO PAINTING (NOTE 4). UPDATE REFERENCES AND
6、 FORMATS. FIGURE 1 METRIC AEROSPACE STANDARD MA3454SHEET 2 OF 2REV. ACOVER - ENGINE ACCESSORY DRIVE, SQUARE, 127.28 BC, METRIC AMS4424 (UNS M11630) OR AMS4484 NOTES: 1. MATERIAL: MAGNESIUM CASTING AMS4424 (UNS M11630) OR AMS4484 (SIMILAR TO UNS M11920).2. PARTING LINES OF CASTINGS ARE TO BE COMMERCI
7、ALLY CLEAN. 3. DICHROMATE TREATMENT: AMS2475. 4. FINISH: UNLESS OTHERWISE SPECIFIED, AMS2510, EXCEPT PRIMER SHALL BE MIL-PRF-23377. DIMENSIONAL LIMITS APPLY BEFORE PAINTING. 5. FLUORESCENT PENETRANT INSPECTION: ASTM E1417 / E1417M, TYPE 1, SENSITIVITY LEVEL 2. BEFORE FINISHING. ACCEPTANCE CRITERIA P
8、ER AS3071. 6. SURFACE TEXTURE: SYMBOLS PER ANSI Y14.36-1978. REQUIREMENTS PER ANSI/ASME B46.1-1985. 7. BREAK EDGES 0.1 TO 0.4 UNLESS OTHERWISE SPECIFIED. 8. DIMENSIONING AND TOLERANCING: ANSI Y14.5M-1982 (ASME PUBLICATION). 9. UNLESS OTHERWISE SPECIFIED, TOLERANCES ON LINEAR DIMENSIONS 0.25. 10. DIM
9、ENSIONS IN MILLIMETERS. 11. COVERS SUITABLE FOR FLIGHT, SHIPMENT, AND STORAGE. 15. 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 T
10、O 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. 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.
