1、AEROSPACE STANDARD BEARING, BALL, AIRFRAME, ANTI-FRICTION, EXTRA WIDE, DOUBLE ROW, INTERMEDIATE DUTY AS27647Copyright 2014 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, mecha
2、nical, 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 ISSUED 1998-04REVISED
3、2014-09THIRD ANGLE PROJECTION CUSTODIAN: AIRFRAME CONTROL BEARINGS GROUP REV.DFEDERAL SUPPLY CLASS 3110 AS27647SHEET 1 OF 3REV. DPROCUREMENT SPECIFICATION: AS7949SAE Technical Standards Board Rules provide that: “This report ispublishedby SAE toadvance thestate of technicalandengineering sciences. T
4、heuse ofthisreportis entirelyvoluntary, andits applicability and suitability forany particular use,including any patent infringement arising therefrom, is thesole responsibilityoftheuser.”SAE reviews eachtechnicalreport at least every five years at which time itmay berevised,reaffirmed, stabilized,
5、orcancelled. SAE invites yourwrittencomments andsuggestions. SAE values your input. To provide feedbackon this Technical Report, please visit http:/www.sae.org/technical/standards/AS27647DRATIONALE LIMITED SCOPE REVISION TO CORRECT THE THRUST LIMIT LOAD OF THE MS27647-5 IN TABLE 1 FROM 600 TO 1600.
6、NOTICE THE INITIAL SAE PUBLICATION OF THIS DOCUMENT WAS TAKEN DIRECTLY FROM U.S. MILITARY STANDARD MS27647E. THIS SAE STANDARD MAY RETAIN THE SAME PART NUMBERS ESTABLISHED BY THE ORIGINAL MILITARY DOCUMENT. ANY REQUIREMENTS ASSOCIATED WITH QUALIFIED PRODUCTS LISTS (QPL) MAY CONTINUE TO BE MANDATORY
7、FOR DOD CONTRACTS. REQUIREMENTS RELATING TO QPLS HAVE NOT BEEN ADOPTED BY THE SAE FOR THIS STANDARD AND ARE NOT PART OF THIS SAE DOCUMENT. THE COMPLETE REQUIREMENTS FOR PROCURING THE PRODUCT DESCRIBED HEREIN SHALL CONSIST OF THIS DOCUMENT AND THE LATEST ISSUE OF AS7949. FIGURE 1 - PART CONFIGURATION
8、 SHOWN WITH RELUBRICATION GROOVE FOR WITHOUT RELUBRICATION GROOVE OMITT “G” IN PART NUMBER AEROSPACE STANDARD AS27647SHEET 2 OF 3REV. DBEARING, BALL, AIRFRAME, ANTI-FRICTION, EXTRA WIDE, DOUBLE ROW, INTERMEDIATE DUTY TABLE 1 - DIMENSIONS AND LOADS MS DASH NO.8/ BBORE +.0000 -.0005 2/ DOUTSIDE DIAMET
9、ER +.0000 -.0005 1/ 2/ WWIDTH INNER RING+.000 -.005 1/ HWIDTH OUTER RING+.000 -.005 1/ (A) SHOULDERDIAMETERINNER RING(APPROX) E4/ C3/ RADIALLIMIT LOAD RATINGLB THRUSTLIMIT LOAD RATINGLB 5/ 6/ RADIAL LOAD RATING (LB) FOR AVERAGE LIFE OF 10 000 COMPLETE 90 CYCLES WEIGHT POUNDS(APPROX)CORNER CHAMFER X
10、45 7/ INNER RING BORE+.015 -.000 OUTER RING OD +.015 -.000 MAXIMUM STARTING TORQUECASE I CASE II (in_oz) -4A .2500 .6250 .562 .500 .338 .005 .016 1400 500 1050 960 .02 1.0 -4 .2500 .7500 .875 .750 .372 .005 .016 2700 900 2070 1850 .04 1.0 -5 .3125 .8750 .938 .813 .466 .005 .016 5140 1600 2600 2320 .
11、07 1.5 -6 .3750 1.0625 1.188 1.063 .570 .005 .016 8440 2600 4220 3740 .12 2.5 -8 .5000 1.4375 1.500 1.375 .709 .005 .032 15 520 4700 7610 6520 .29 2.5 1/ ALL DIMENSIONS TO BE MET AFTER PLATING. 2/ OUT-OF-ROUND TOLERANCES: BORE: +.0002, -.0007; OUTER DIA: +.0005, -.0010. 3/ A RADIUS GIVING APPROXIMAT
12、ELY THE SAME GRIP FOR STAKING THE BEARING IN THE HOUSING WILL BE ACCEPTABLE. 4/ A RADIUS GIVING APPROXIMATELY THE SAME FILLET CLEARANCE WILL BE ACCEPTABLE. 5/ CASE I - LOAD FIXED WITH RESPECT TO OUTER RING. CASE II - LOAD FIXED WITH RESPECT TO INNER RING. 6/ THESE RATINGS ARE FOR OPERATION UP TO 250
13、 F. FOR OPERATION UP TO 350 F, THE RATINGS SHALL BE REDUCED BY 20%. 7/ 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. 8/ -4A AND -4 BALL RE
14、TAINER TYPE REQUIREMENTS: 1. MATERIAL: RINGS AND BALLS: 52100 STEEL PER AMS6440 OR AMS6444 BALL RETAINER (-4A AND -4 ONLY): CARBON STEEL OR CRES SEALS: POLYTETRAFLUOROETHYLENE (PTFE) PER AMS3652 SEAL RETAINERS: ANY CORROSION RESISTANT STEEL 2. LUBRICANT: MIL-PRF-81322 OR MIL-PRF-23827 TYPE I. ALL BE
15、ARINGS SHALL BE PACKED WITH AN 80% MINIMUM GREASE FILL CONFORMING TO MIL-PRF-81322 UNLESS OTHERWISE SPECIFIED. IF MIL-PRF-23827 TYPE I IS REQUIRED, ADD THE LETTER “L“ AFTER THE MS27647 DASH NUMBER. MIL-PRF-23827 TYPE I SHALL NOT BE USED FOR OPERATION WHERE TEMPERATURES EXCEED 250 F. WITH “G” DESIGNA
16、TOR PART NUMBER INDICATES RELUBRICATION GROOVE 3. HARDNESS: HEAT TREAT RINGS AND BALLS TO 60-66 HRC AND STABILIZE FOR OPERATION AT 250 F 4. SURFACE ROUGHNESS: RACEWAYS AND BALL SHALL HAVE A MAXIMUM SURFACE ROUGHNESS OF 8 MICROINCHES Ra PER ANSI/ASME B46.1 5. PLATING: ALL EXTERNAL SURFACES EXCEPT BOR
17、E, SEALS AND SEAL RETAINERS SHALL BE PLATED .0003 TO .0006 THICK WITH: (NO DESIGNATOR) CADMIUM IN ACCORDANCE WITH AMS-QQ-P-416, TYPE I, CLASS 2 DESIGNATOR “E” ZINC-NICKEL IN ACCORDANCE WITH AMS2417, TYPE 2, GRADE B 6. RADIAL INTERNAL CLEARANCE: WITHOUT “R“ DESIGNATOR PART NUMBER INDICATES .0000 TO .
18、0010 WITH “R“ DESIGNATOR PART NUMBER INDICATES .0002 TO .0005 7. RADIAL ECCENTRICITY: INNER RING, .0010 MAX, OUTER RING, .0016 MAX. 8. LATERAL ECCENTRICITY: INNER RING, .0010 MAX, OUTER RING, .0016 MAX. AEROSPACE STANDARD AS27647SHEET 3 OF 3REV. DBEARING, BALL, AIRFRAME, ANTI-FRICTION, EXTRA WIDE, D
19、OUBLE ROW, INTERMEDIATE DUTY 9. PART NUMBER: THE PART NUMBER SHALL BE SEQUENCED LEFT TO RIGHT WITH DESIGNATIONS IN THE FOLLOWING SEQUENCE: EXAMPLE OF PART NUMBER: MS27647 -4RGLE = BEARING, BALL, AIRFRAME, ANTIFRICTION, EXTRA WIDE, DOUBLE ROW, INTERMEDIATE DUTY, .2500 INCH BORE, .0002 TO .0005 INCH R
20、ADIAL INTERNAL CLEARANCE, FILLED 80% MINIMUM WITH MIL-PRF-23827 TYPE I LUBRICANT, 250 F MAX. WITH ZINC-NICKEL PLATING ZINC-NICKEL PLATING (SEE PLATING DESIGNATOR) LUBRICANT (SEE LUBRICANT DESIGNATOR) RELUBRICATION GROOVE (SEE RELUBRICATION GROOVE DESIGNATOR) RADIAL INTERNAL CLEARANCE (SEE RADIAL INT
21、ERNAL CLEARANCE DESIGNATOR) DASH NUMBER (SEE TABLE 1) BASIC PART NUMBER NOTES: NOTICE THIS DOCUMENT REFERENCES A PART WHICH CONTAINS CADMIUM AS A PLATING MATERIAL. CONSULT LOCAL OFFICIALS IF YOU HAVE QUESTIONS CONCERNING CADMIUMS USE. 1. ALL DIMENSIONS ARE IN INCHES, UNLESS OTHERWISE SPECIFIED. 2. I
22、N THE EVENT OF A CONFLICT BETWEEN THE TEXT OF THIS SPECIFICATION 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. A CHANGE BAR (l) LOCATED IN THE LEFT MARGIN IS FOR THE CONVENIENCE OF T
23、HE 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.
