1、AEROSPACE STANDARD BEARING, ROLLER, SELF-ALIGNING, DOUBLE ROWTORQUE TUBE, AIRFRAME, ANTI-FRICTION, SEALED, TYPE IV AS28915Copyright 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
2、ctronic, 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 ISSUED 1
3、998-06REVISED 2012-10THIRD ANGLE PROJECTION CUSTODIAN: ACBG REV.CFEDERAL SUPPLY CLASS 3110 AS28915SHEET 1 OF 2REV. CPROCUREMENT SPECIFICATION: NONESAE Technical Standards Board Rules provide that: “This report ispublishedby SAE toadvance thestate of technicalandengineering sciences. Theuse ofthis re
4、port 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, revised, orcancelled. SAE invite
5、s yourwrittencomments andsuggestions. SAE values your input. To provide feedbackon this Technical Report, please visit http:/www.sae.org/technical/standards/AS28915CRATIONALE THE REASON FOR UPDATING THIS SPECIFICATION IS TO ADD AN IDENTIFICATION LETTER FOR ZINC NICKEL PLATING (OPTION “E”), AND TO AD
6、D IDENTIFICATION LETTERS FOR MIL-PRF-23827 GREASE, TYPE I OR TYPE II (OPTION “G”), TYPE I (OPTION “H”), AND TYPE II (OPTION “J”). NOTICE THE REQUIREMENTS FOR ACQUIRING THE PRODUCT(S) DESCRIBED HEREIN SHALL CONSIST OF THIS SPECIFICATION SHEET AND THE ISSUE OF THE FOLLOWING SPECIFICATION LISTED IN THA
7、T ISSUE OF THE DODISS SPECIFIED IN THE SOLICITATION: SAE AS8914. A B C D E F G+.0000 +.0000 +.005 +.000 +.000 +.020-.0011 -.0011 -.005 -.005 -.005 -.000BORE *1 *2 O.D. *3 DIAMETERWIDTH OUTER RING *4WIDTH INNER RING *4RADIUS-16C 1.0000 1.6250 1.120-20C 1.2500 1.8750 1.390-25C 1.5630 2.5000 1.800-28C
8、1.7500 2.6880 1.980-33C 2.0630 3.0000 2.300-37C 2.3130 3.2500 2.560-47C 2.9380 3.8750 3.200-49C 3.0630 4.0000 3.330OVER INCL LOW HIGH LOW HIGH.0000 1.0000 -.0008 -.0005 +.0000 +.0003 - - - -1.0000 2.0000 -.0011 -.0008 +.0000 +.0003 -.0020 -.0010 +.0000 +.00102.0000 4.0000 -.0014 -.0011 +.0000 +.0003
9、 -.0021 -.0011 +.0000 +.0010BASIC (NOMINAL) DIAMETERBEARING ROUNDNESS LIMITSBORE ACCEPTANCE LIMITS O.D. ACCEPTANCE LIMITSd MIN.MEAN DIAMETERd MAX. D MIN. D MAX.MEAN DIAMETER.580.500.670.060 .02023LUBRICATION HOLEMS DASH No.NUMBER OF LUBRICATION HOLES.450*1. TOLERANCE ON -16C BORE IS +.0000 TO -.0005
10、 *2. TOLERANCE ON -20C, -25C, AND -28C BORE IS +.0000 TO -.0008 *3. TOLERANCE ON -16C AND -20C O.D. IS +.0000 TO -.0010 *4. TOLERANCE ON -33C, -37C, -47C, AND -49C OUTER RING WIDTH AND INNER RING WIDTH IS +.000 TO -.008 AEROSPACE STANDARD AS28915SHEET 2 OF 2REV. CBEARING, ROLLER, SELF-ALIGNING, DOUB
11、LE ROW TORQUE TUBE, AIRFRAME, ANTI-FRICTION, SEALED, TYPE IV REQUIREMENTS: NOTICE THIS DOCUMENT REFERENCES A PART WHICH MAY CONTAIN CADMIUM AS A PLATING MATERIAL. CONSULT LOCAL OFFICIALS IF YOU HAVE QUESTIONS CONCERNING CADMIUMS USE. 1. MATERIAL: RETAINERS: SAE 4140 STEEL PER AMS6382, AMS6349, OR CO
12、PPER ALLOY PER AMS4640, QQ-C-390 OR EQUIVALENT. RINGS AND ROLLERS: SAE 52100 STEEL PER AMS6440 OR AMS-S-7420 PER AMS-STD-66 2. MIL-PRF-81322 OR MIL-PRF-23827 (TYPE I OR TYPE II). ALL BEARINGS SHALL BE FILLED 80% MINIMUM WITH GREASE. IF MIL-PRF-23827 (TYPE I OR TYPE II) IS REQUIRED, ADD THE LETTER “G
13、” AFTER THE MS28915 DASH NUMBER. FOR TYPE I ONLY, ADD LETTER “H”, OR FOR TYPE II ONLY, ADD LETTER “J” AFTER THE MS28915 DASH NUMBER. MIL-PRF-23827 (TYPE I OR TYPE II) SHALL NOT BE USED WHERE TEMPERATURE EXCEEDS 250 F MAX. 3. RADIAL INTERNAL CLEARANCE: .0004 TO .0010. 4. FINISH: ZINC-NICKEL PLATED IN
14、 ACCORDANCE WITH AMS2417, TYPE 2, GRADE B 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” AS SHOWN IN NOTE 9. 5. SURFACE ROUGHNESS: RACEWAYS 8 MICROINCHES Ra MAXIMUM, ROLLERS 6 MICROIN
15、CHES Ra MAXIMUM. ALL OTHER SURFACES 32 MICROINCHES Ra MAXIMUM IN ACCORDANCE WITH ANSI/ASME B46.1. REMOVE BURRS AND SHARP EDGES. 6. DIMENSIONS IN INCHES UNLESS OTHERWISE SPECIFIED. 7. TOLERANCES: DECIMALS +.010 TO -.000, UNLESS OTHERWISE SPECIFIED. 8. DIMENSIONS TO BE MET AFTER PLATING. 9. EXAMPLE OF
16、 PART NUMBER MS28915 - 16C G E “E“ = (NO CODE) 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-PRF-23827, Type I GREASE “J“ = MIL-PRF-23827, Type II GREASE DASH NUMBER (SEE TABLE I) BASIC PART NUMBER 10. FOR DESIGN FE
17、ATURE PURPOSE, THIS SPECIFICATION TAKES PRECEDENCE OVER PROCUREMENT DOCUMENTS REFERENCED HEREIN. 11. REFERENCED DOCUMENTS SHALL BE OF THE ISSUE IN EFFECT ON DATE OF INVITATION FOR BIDS. 12. SELF-ALIGNING TO 2 DEGREES MAX IN EITHER DIRECTION. 13. A CHANGE BAR (l) LOCATED IN THE LEFT MARGIN IS FOR THE
18、 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.
