1、 AEROSPACE STANDARD BEARING, BALL, AIRFRAME, ANTIFRICTION, INTERMEDIATE DUTY CORROSION RESISTANT NITROGEN STEEL (CREN) AS27649/1 Copyright 2017 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 mea
2、ns, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-4970 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org I
3、SSUED2017-02THIRD ANGLE PROJECTION CUSTODIAN: ACBG FEDERAL SUPPLY CLASS 3110 AS27649/1 SHEET 1 OF 3 PROCUREMENT SPECIFICATION: AS7949 6$(7HFKQLFDO6WDQGDUGV%RDUG5XOHVSURYLGHWKDW7KLVUHSRUWLVSXElished by SAEtoadvance thestate of technicaland engineering sciences. The useof this report is entirely volun
4、tary, and its applicability andsuitability for any particularuse, includingany patent infringement arisingtherefrom,is the sole responsibLOLWRIWKHXVHUSAE reviews eachtechnical reportatleast every fiveyears at whichtime it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written
5、 comments and suggestions.SAE values your input. To provide feedback on this Technical Report, please visit http:/standards.sae.org/AS27649/1 RATIONALE THIS STANDARD DEFINES A CORROSION RESISTANT NITROGEN STEEL (CREN) VERSION OF THE AS27649 INTERMEDIATE DUTY AIRFRAME BALL BEARING SERIES. NOTICE THE
6、COMPLETE REQUIREMENTS FOR PROCURING THE PRODUCT DESCRIBED HEREIN SHALL CONSIST OF THIS DOCUMENT AND THE LATEST ISSUE OF AS7949. FIGURE 1 - PART CONFIGURATION AEROSPACE STANDARD AS27649/1 SHEET 2 OF 3 BEARING, BALL, AIRFRAME, ANTIFRICTION, INTERMEDIATE DUTY CORROSION RESISTANT NITROGEN STEEL (CREN) T
7、ABLE 1 - DIMENSIONS AND LOADS AS DASH NO. 1/ B BORE +.0000 -.0005 1/ D OUTSIDE DIAMETER +.0000 -.0005 W WIDTH INNER RING +.0000 -.0025 H WIDTH OUTER RING +.000 -.005 (A) SHOULDER DIAMETER INNER RING (APPROX) E 3/ C 2/ RADIAL LIMIT LOAD RATING POUND THRUST LIMIT LOAD RATING POUND 4/ 5/ RADIAL LOAD RA
8、TING (POUND) FOR AVERAGE LIFE OF 10000 COMPLETE 90 CYCLES WEIGHT POUNDS (APPROX) CORNER CHAMFER X 45 INNER RING BORE +.015 -.000 OUTER RING OD +.015 -.000 6/ MAXIMUM STARTING CASE I CASE II TORQUE -3 .1900 .6250 .4060 .312 .317 .005 .016 450 210 440 440 .018 -4 .2500 .7500 .4380 .312 .415 .005 .016
9、525 250 510 510 .028 -5 .3125 .8125 .4690 .344 .462 .015 .016 820 380 800 800 .033 -6 .3750 .8750 .4690 .344 .520 .015 .016 820 380 800 800 .034 -8 .5000 1.1250 .5620 .438 .681 .015 .016 1350 630 1310 1310 .075 -10 .6250 1.3750 .5940 .469 .848 .015 .032 1840 860 1790 1790 .119 -12 .7500 1.6250 .6560
10、 .531 1.052 .015 .032 2400 1120 2340 2340 .189 -16 1.0000 2.0000 .6880 .562 1.334 .015 .032 3000 1400 2920 2920 .296 -20 1.2500 2.2500 .6880 .562 1.615 .015 .032 3600 1680 3500 3270 .355 1/ OUT-OF-ROUND TOLERANCES: BORE: +.0002, -.0007; OUTER DIAMETER: +.0005, -.0010. 2/ A RADIUS GIVING APPROXIMATEL
11、Y THE SAME GRIP FOR STAKING THE BEARING IN THE HOUSING WILL BE ACCEPTABLE. 3/ A RADIUS GIVING APPROXIMATELY THE SAME FILLET CLEARANCE WILL BE ACCEPTABLE. 4/ CASE I - LOAD FIXED WITH RESPECT TO OUTER RING. CASE II - LOAD FIXED WITH RESPECT TO INNER RING. 5/ THESE RATINGS ARE FOR OPERATION UP TO 250 F
12、. FOR OPERATION UP TO 350 F, THE RATINGS SHALL BE REDUCED BY 20%. 6/ SPECIFIED LIMITS ARE FOR BEARINGS LUBRICATED WITH MIL-PRF-81322 GREASE. FOR BEARINGS LUBRICATED WITH MIL-PRF-23827 TYPE I GREASE, THE TORQUE LIMIT SHALL BE THE SPECIFIED VALUE IN THE TABLE MULTIPLIED BY 1.2. REQUIREMENTS 1. MATERIA
13、L: RINGS: CORROSION RESISTANT NITROGEN STEEL (CREN) PER AMS5898, AMS5925, OR AISI 422 STEEL PER AMS5655. BALLS: NO SUFFIX CODE: CORROSION RESISTANT NITROGEN STEEL (CREN) PER AMS5898 OR AMS5925. 68),; IMUM PASSIVATED AND BALLS PER AMS5880 OR AMS5618 BALL MATERIAL CODE (SEE REQUIREMENT 1) LUBRICANT CO
14、DE (SEE REQUIREMENT 4) $6$6+180%(5 6(E TABLE 1) AEROSPACE STANDARD NUMBER NOTES 1. ALL DIMENSIONS ARE IN INCHES, UNLESS OTHERWISE SPECIFIED. 2. IN THE EVENT OF A CONFLICT BETWEEN THE TEXT OF THIS SPECIFICATION AND REFERENCES CITED HEREIN, THE TEXT OF THIS STANDARD TAKES PRECEDENCE. 3. REFERENCED DOC
15、UMENTS SHALL BE OF THE ISSUE IN EFFECT ON DATE OF INVITATION FOR BIDS. 4. REVISION INDICATOR: A CHANGE BAR (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. .
