1、 AEROSPACE STANDARD BEARING, ROLLER, NEEDLE, DOUBLE ROW, HEAVY DUTY, TRACK ROLLER, SEALED, TYPE VI, INCH AS21439Copyright 2013 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, m
2、echanical, 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 1998-07REVI
3、SED 2013-01THIRD ANGLE PROJECTION CUSTODIAN: ACBG REV.C FEDERAL SUPPLY CLASS 3110 AS21439SHEET 1 OF 3 REV. C PROCUREMENT SPECIFICATION: NONESAE Technical Standards Board Rules provide that: “This report ispublishedby SAE toadvance thestate of technicalandengineering sciences. Theuse ofthis report is
4、 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, stabilized or cancelled.SAEinv
5、ites yourwrittencomments andsuggestions. SAE values your input. To provide feedbackon this Technical Report, please visit http:/www.sae.org/technical/standards/AS21439C RATIONALE AS21439 REV C IS A LIMITED SCOPE CHANGE ADDING GRADE B FOR ZINC NICKEL PLATING. NOTICE UNDER DEPARTMENT OF DEFENSE POLICI
6、ES AND PROCEDURES, ANY QUALIFICATION REQUIREMENTS AND ASSOCIATED QUALIFIED PRODUCTS LISTS ARE MANDATORY FOR DOD CONTRACTS. ANY REQUIREMENT RELATING TO QUALIFIED PRODUCTS LISTS (QPLS) HAS NOT BEEN ADOPTED BY SAE AND IS NOT PART OF THIS TECHNICAL REPORT. THE COMPLETE REQUIREMENTS FOR PROCURING THE PRO
7、DUCT DESCRIBED HEREIN SHALL CONSIST OF THIS DOCUMENT AND THE LATEST ISSUE OF SAE AS39901. FIGURE 1 TABLE 1 - DIMENSIONS IN INCHES AEROSPACE STANDARD AS21439 SHEET 2 OF 3 REV. C BEARING, ROLLER, NEEDLE, DOUBLE ROW, HEAVY DUTY, TRACK ROLLER, SEALED, TYPE VI, INCH TABLE 2 - TOLERANCE VALUE 1. MATERIAL:
8、 a. INNER RING, OUTER RING, AND NEEDLES: 52100 STEEL PER AMS6440, AMS6444, AMS6447, OR ASTM A295. b. ENDWASHERS: 52100 STEEL PER AMS6440, AMS6444, AMS6447, OR ASTM A295. AISI 1074 STEEL PER ASTM A684. c. SEALS AND BACKING RINGS: ACETAL RESIN PER ASTM D6778 POM 111 OR NYLON PER L-P-410, TYPE 6/6, WEA
9、R RESISTANT GRADE, OR POLYESTER ELASTOMER. CONSTRUCTION OPTIONAL. d. RETAINING RINGS: BRASS (OPTIONAL) 2. HEAT TREAT: a. OUTER RING: HARDEN AND TEMPER TO 58-62 HRC b. INNER RING: HARDEN AND TEMPER TO 60-64 HRC OR INDUCTION HARDEN TO 60-64 HRC FOR .015 INCH MINIMUM DEPTH AND 50 HRC AT .030 INCH MINIM
10、UM DEPTH. c. NEEDLES: HARDEN AND TEMPER TO 60-64 HRC d. ENDWASHERS: HARDEN AND TEMPER TO 51-56 HRC 3. FINISH OR PLATING: a. OUTER RING - OUTER RING CHROME PLATED PER AMS-QQ-C-320, CLASS 2. O.D. AND O.D. CORNERS .0004 TO .0010 INCH THICKNESS, FACES MINIMUM .0003 INCH THICKNESS. b. INNER RING - ALL EX
11、TERNAL SURFACES BLACK OXIDE PER MIL-DTL-13924. c. ENDPLATES - ALL EXPOSED SURFACES ZINC-NICKEL PLATED IN ACCORDANCE AMS2417, TYPE 2, GRADE B OR CADMIUM PLATED IN ACCORDANCE WITH AMS-QQ-P-416, TYPE I, CLASS 2, WITH A THICKNESS OF .0003 TO .0006 INCHES. IF ZINC-NICKEL PLATING IS REQUIRED, ADD THE LETT
12、ER “E” AFTER THE MS21439 DASH NUMBER. NO CODE DESIGNATES CADMIUM PLATING IS REQUIRED. 4. SURFACE TEXTURE: RACEWAYS - 16 MICROINCHES MAXIMUM Ra BORE AND O.D. - 40 MICROINCHES MAXIMUM Ra NEEDLE O.D. - 8 MICROINCHES MAXIMUM Ra 5. LUBRICANT: MIL-PRF-81322 OR MIL-PRF-23827. ALL BEARINGS SHALL BE PREPACKE
13、D WITH GREASE CONFORMING TO MIL-PRF-81322 UNLESS OTHERWISE SPECIFIED. ALL BEARINGS SHALL BE FILLED 80% MINIMUM WITH GREASE. IF MIL-PRF-23827 TYPE 1 GREASE IS REQUIRED, ADD THE SUFFIX “G” TO THE MS DASH NUMBER. IF MIL-PRF-23827 TYPE 2 GREASE IS REQUIRED, ADD THE SUFFIX “J” TO THE MS21439 DASH NUMBER.
14、 6. MARKING: THE MARKING SHALL CONSIST OF THE MS PART NUMBER AND THE MANUFACTURERS CAGE CODE MARKED IN ACCORDANCE WITH MIL-STD-130. AND A LOT CONTROL NUMBER IF SPACE IS AVAILABLE. 7. PART NUMBER: THE PART NUMBER SHALL CONSIST OF THE MS SPECIFICATION NUMBER FOLLOWED BY A DASH NUMBER TAKEN FROM TABLE
15、1 AND APPLICABLE SUFFIXES. FINISH SUFFIX TO BE DESIGNATED BEFORE LUBRICANT SUFFIX. EXAMPLE: MS21439-106EG AEROSPACE STANDARD AS21439 SHEET 3 OF 3 REV. C BEARING, ROLLER, NEEDLE, DOUBLE ROW, HEAVY DUTY, TRACK ROLLER, SEALED, TYPE VI, INCH 8. PACKAGING: BEARINGS SHALL BE INDIVIDUALLY PACKAGED TO THE R
16、EQUIREMENTS OF MIL-DTL-197. PACKAGE MARKED WITH MANUFACTURERS NAME OR TRADEMARK, AND DATE OF LUBRICATION BY MONTH AND YEAR AND LOT CONTROL NUMBER. 9. DIMENSIONS: ALL DIMENSIONS ARE AFTER PLATING AND ARE IN INCHES. 10. LOAD RATING: THE LIMIT LOAD RATING LISTED CAN BE DEFINED AS THE MAXIMUM RADIAL LOA
17、D WHICH CAN BE APPLIED TO A BEARING WITHOUT IMPAIRING THE SUBSEQUENT FUNCTIONING OF THE BEARING. THE ULTIMATE OR STATIC FRACTURE LOAD RATING IS NOT LESS THAN 1.5 TIMES THE LIMIT LOAD RATING. THE LOAD RATING AS A TRACK ROLLER IS THE LOAD THE BEARING WILL CARRY AS A TRACK ROLLER FOR AN L-10 LIFE OF 20
18、 000 REVOLUTIONS. 11. RADIAL INTERNAL CLEARANCE SHALL BE .0018 INCH MAXIMUM 12. TEMPERATURE: OPERATING TEMPERATURE RANGE -65 TO 350 F FOR MIL-PRF-81322 LUBRICATED BEARINGS OPERATING TEMPERATURE RANGE -65 TO 250 F FOR MIL-PRF-23827 LUBRICATED BEARINGS NOTES: NOTICE THIS DOCUMENT REFERENCES A PART WHI
19、CH CONTAINS CADMIUM AS A PLATING MATERIAL. CONSULT LOCAL OFFICIALS IF YOU HAVE QUESTIONS CONCERNING CADMIUMS USE. 1. DESIGN FEATURES: FOR DESIGN FEATURE PURPOSES, THIS SPECIFICATION TAKES PRECEDENCE OVER DOCUMENTS REFERENCED HEREIN. 2. REFERENCED DOCUMENTS: REFERENCED DOCUMENTS ARE THE ISSUES IN EFF
20、ECT ON DATE OF INVITATIONS FOR BID. 3. 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.
