1、AEROSPACE STANDARD BEARING, ROLLER, SELF-ALIGNING. SINGLE ROW, ANTI-FRICTION, SEALED, -65 TO 350 F, TYPE I AS21431Copyright 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,
2、 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.orgISSUED 1998-07 RE
3、VISED 2012-09 THIRD ANGLE PROJECTION CUSTODIAN: SAE AIRFRAME CONTROL BEARINGS GROUP REV.BFEDERAL SUPPLY CLASS 3110 AS21431SHEET 1 OF 2REV. BPROCUREMENT SPECIFICATION: AS8914SAE Technical Standards Board Rules provide that: “This report ispublishedby SAE toadvance thestate of technicalandengineering
4、sciences. 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 bereaffirmed, revise
5、d, orcancelled. SAE invites yourwrittencomments andsuggestions. SAE values your input. To provide feedbackon this Technical Report, please visit http:/www.sae.org/technical/standards/AS21431BRATIONALE THE REASON FOR UPDATING THIS SPECIFICATION IS TO ADD IDENTIFICATION LETTERS FOR CAD PLATING (OPTION
6、 “P”) AND ZINC NICKEL PLATING (OPTION “E”), AND TO ADD IDENTIFICATION LETTERS FOR MIL-PRF-23827 TYPE I OR TYPE II (OPTION “G”), TYPE I (OPTION “H”), AND TYPE II (OPTION “J”). .TABLE 1 DASH NO. BD W H A P WT LBLIMIT LOAD - LB RADIAL DYNAMIC LOAD.LB+.0000 +.0000 +.000 +.000 +.005 RADIAL THRUST -.0005
7、-.0005 -.005 -.005 -.005 -3 .1900 1.0000 .500 .344 .420 10 .07 2720 270 2260 -4 .2500 1.0000 .500 .344 .420 10 .06 2720 270 2260 -5 .3125 1.2500 .588 .375 .550 10 .12 4210 420 3490 -6 .3750 1.4375 .620 .469 .660 10 .17 6160 610 5120 -7 .4375 1.5000 .812 .625 .660 10 .30 7900 790 6550 -8 .5000 1.6250
8、 .750 .687 .810 2.5 .37 11 900 1190 9940 BASIC (NOMINAL) DIAMETERBEARING ROUNDNESS LIMITS BORE ACCEPTANCE LIMITS O.D. ACCEPTANCE LIMITS d MIN. MEAN DIAMETER d MAX. D MIN. MEAN DIAMETER D MAX. OVER INCL. LOW HIGH LOW HIGH - 2.0000 -.0005 -.0005 +.0000 +.0001 -.0008 -.0005 +.0000 +.0003 AEROSPACE STAN
9、DARD AS21431SHEET 2 OF 2REV. BBEARING, ROLLER, SELF-ALIGNING. SINGLE ROW, ANTI-FRICTION, SEALED, -65 TO 350 F, TYPE I NOTES: NOTICE THIS DOCUMENT REFERENCES A PART WHICH MAY CONTAIN CADMIUM AS A PLATING MATERIAL. CONSULT LOCAL OFFICIALS IF YOU HAVE QUESTIONS CONCERNING CADMIUMS USE. REQUIREMENTS: 1.
10、 MATERIAL: RINGS AND ROLLERS: SAE 52100 STEEL PER AMS6440. SEALS: POLYTETRAFLUOROETHYLENE SHEET, GLASS FABRIC REINFORCED PER AMS3666. SHIELDS: CORROSION RESISTANT STEEL, AISI 300 OR AISI 400 SERIES STEEL. 2. LUBRICANT: MIL-PRF-81322 OR MIL-PRF-23827 (TYPE I OR TYPE II). ALL BEARINGS SHALL BE FILLED
11、80% MINIMUM WITH GREASE CONFORMING TO MIL-PRF-81322 UNLESS OTHERWISE SPECIFIED. IF MIL-PRF-23827 (TYPE I OR TYPE II) IS REQUIRED, ADD THE LETTER “G” AFTER THE MS21431 DASH NUMBER. FOR TYPE I ONLY, ADD LETTER “H”, OR FOR TYPE II ONLY, ADD LETTER “J” AFTER THE MS21431 DASH NUMBER. MIL-PRF-23827 (TYPE
12、I OR TYPE II) SHALL NOT BE USED WHERE TEMPERATURE EXCEEDS 250 F MAX. 3. HARDNESS: HEAT TREAT RINGS AND ROLLERS TO ROCKWELL “C“ 60 TO 65 AND STABILIZE FOR OPERATION AT 250 F. 4. SURFACE ROUGHNESS: RACEWAYS 8 MICROINCHES Ra AND ROLLERS 6 MICROINCHES Ra IN ACCORDANCE WITH ANSI/ASME B46.1. 5. INTERNAL C
13、LEARANCE: RADIAL .0006 TO .0014. 6. FINISH: ZINC-NICKEL PLATED IN ACCORDANCE WITH AMS2417, TYPE 2, OR CADMIUM PLATED IN ACCORDANCE WITH AMS-QQ-P-416, TYPE I, CLASS 2, TO A THICKNESS OF .0003 TO .0006 INCHES. IF ZINC-NICKEL PLATING IS REQUIRED, ADD THE LETTER “E” AND IF CADMIUM PLATING IS REQUIRED, A
14、DD THE LETTER “P” AFTER THE MS21431 DASH NUMBER AS SHOWN IN NOTE 7. 7. EXAMPLE OF PART NUMBER: MS21431 - 4 G E “E“ = (NO CODE) CADMIUM PLATE OR ZINC-NICKEL PLATE “P“ = CADMIUM PLATE “E“ = ZINC-NICKEL PLATE “G“ = (NO CODE) MIL-PRF-81322 GREASE “G“ = MIL-PRF-23827, Type I or Type II GREASE “H“ = MIL-P
15、RF-23827, Type I GREASE “J“ = MIL-PRF-23827, Type II GREASE DASH NUMBER (SEE TABLE 1) BASIC PART NUMBER 8. DIMENSIONS ARE IN INCHES UNLESS OTHERWISE SPECIFIED. 9. THESE LOAD RATINGS ARE FOR OPERATIONS UP TO 250 F. FOR OPERATIONS UP TO 350 F THE RATINGS SHALL BE REDUCED BY 20%. 10. DIMENSIONS TO BE M
16、ET AFTER PLATING. 11. REMOVE BURRS AND SHARP EDGES. 12. 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 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.
