1、 AEROSPACE STANDARD BEARING, ROLLER, ROD END, INTERNAL THREAD,SELF-ALIGNING, ANTI-FRICTION, AIRFRAME, HEAVY DUTY, TYPE II, -67 TO 350 F, SEALED AS21220 Copyright 2006 SAE International All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in
2、 any form or by any means, 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: 724-776-4970 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS:
3、 http:/www.sae.org ISSUED 1998-05REVISED 2006-09 THIRD ANGLE PROJECTION CUSTODIAN: SAE ACBG REV. B FEDERAL SUPPLY CLASS3110 AS21220 SHEET 1 OF 2 REV.B SAE TechnicalStandards Board Rules provide that: “This report ispublished by SAE toadvance thestate of technical andengineering sciences. Theuse of t
4、hisreport is entirely voluntary, andits applicabilityandsuitability forany particularuse,including any patent infringement arising therefrom, is thesole responsibility oftheuser.” SAE reviews each technical report at least every five yearsat which time it may be reaffirmed, revised, orcancelled.SAE
5、invites yourwritten commentsandsuggestions.RATIONALE DIMENSIONAL CORRECTION. NOTE THIS DOCUMENT INCLUDES CADMIUM AS A PLATING MATERIAL. THE USE OF CADMIUM HAS BEEN RESTRICTED AND/OR BANNED FOR USE IN MANY COUNTRIES DUE TO ENVIRONMENTAL AND HEALTH CONCERNS. THE USER SHOULD CONSULT WITH LOCAL OFFICIAL
6、S ON APPLICABLE HEALTH AND ENVIRONMENTAL REGULATIONS REGARDING ITS USE. THE REQUIREMENTS FOR ACQUIRING THE PRODUCT(S) DESCRIBED HEREIN SHALL CONSIST OF THIS SPECIFICATION SHEET AND THE ISSUE OF THE FOLLOWING SPECIFICATION LISTED IN THAT ISSUE OF THE DODISS SPECIFIED IN THE SOLICITATION: AS8952. TABL
7、E 1 - DIMENSIONS AND LOADS LIMIT LOAD RATING (LB) MS DASH NO. A .005 B +.0000 -.0005 D +.000 -.050 E UNJF-3B THREAD F .015 H +.000 -.015 J HEX FLATS .015 L .020 M .030 N .005 W +.000 -.005 RADIAL AXIAL RADIAL DYNAMIC LOAD RATING (LB) NET WT (LB) -4G .420 .2500 1.080 .375-24 1.660 .360 .500 .810 .562
8、 .500 2,730 270 2,270 .11 -5G .560 .3125 1.410 .500-20 2.340 .460 .690 1.310 .750 .687 4,970 490 4,120 .27 -6G .660 .3750 1.660 .625-18 3.090 .550 .880 1.750 .938 .015 .812 7,910 790 6,570 .53 1/ THESE BEARINGS ARE SELF-ALIGNING FOR 10 IN ANY DIRECTION. REQUIREMENTS: 1. MATERIAL: INNER RING AND ROLL
9、ERS: STEEL, E52100 PER AMS 6440. OUTER RING ROD END: STEEL, AISI/SAE 4620 PER AMS 6294 OR AISI-SAE 8620H PER AMS 6274 OR COMPOSITION III (9310) PER AMS 6260 OR E52100 PER AMS 6440. 2. LUBRICANT: MIL-PRF-81322 OR MIL-PRF-23827. ALL BEARINGS SHALL BE PACKED WITH GREASE CONFORMING TO MIL-PRF-81322 UNLE
10、SS OTHERWISE SPECIFIED. ALL BEARINGS SHALL BE FILLED 80% MINIMUM WITH GREASE. IF MIL-PRF-23827 IS REQUIRED, ADD THE LETTER “H” AFTER THE MS21220 DASH NUMBER. IF A LUBRICATION FITTING IS NOT DESIRED, DELETE THE CODE “G” AFTER THE MS21220 DASH NUMBER. MIL-PRF-23827 SHALL NOT BE USED FOR OPERATION WHER
11、E TEMPERATURES EXCEED 250 F. AEROSPACE STANDARD BEARING, ROLLER, ROD END, INTERNAL THREAD, SELF-ALIGNING, ANTI-FRICTION, AIRFRAME, HEAVY DUTY, TYPE II, -67 TO 350 F, SEALED AS21220 REV. B AS21220 SHEET 2 OF 2 REV.B 3. SEALS: POLYTETRAFLUOROETHYLENE PER AMS 3652 OR POLYTETRAFLUOROETHYLENE SHEET, GLAS
12、S FABRIC REINFORCED PER AMS 3666 OR POLYETHER-ESTER PER ASTM D 4550, GROUP 4, CLASS 1, GRADE 1 OR AN APPROVED EQUIVALENT. 4. INTERNAL CLEARANCE: RADIAL .0001 TO .0015; AXIAL .001 TO .030. 5. SURFACE ROUGHNESS: RACEWAYS 8 MICROINCHES Ra MAXIMUM, ROLLERS 6 MICROINCHES Ra MAXIMUM, IN ACCORDANCE WITH AN
13、SI/ASME B46.1. 6. BEARING RATINGS ARE FOR OPERATION UP TO 250 F MAXIMUM FOR OPERATION UP TO 350 F, THE RATINGS SHALL BE REDUCED BY 20%. 7. ADD SUFFIX LETTER “K” WHEN NASM14198 KEYWAY IS REQUIRED. ADD SUFFIX LETTER “L” WHEN LEFT HAND THREAD IS REQUIRED. EXAMPLE OF PART NUMBER: MS21220-4 G K L H = BEA
14、RING, ROD END, ROLLER, SELF-ALIGNING, .2500 BORE, LUBRICATION FITTING WITH MIL-PRF-23827 LUBRICANT, NASM14198 KEYWAY, .375-24UNJF-3B LEFT HAND INTERNAL THREAD PREPACKED WITH MIL-PRF-23827 LUBRICANT (SEE REQUIREMENT 2) LEFT HAND THREAD DESIGNATOR NASM14198 KEYWAY DESIGNATOR LUBRICATION FITTING DESIGN
15、ATOR DASH NUMBER MILITARY SPECIFICATION SHEET NUMBER WHEN THE DESIGNATOR IS NOT APPLICABLE, IT SHALL BE OMITTED FROM THE PART NUMBER. 8. PLATING: ALL EXTERNAL SURFACES EXCEPT BORE, SEALS AND RETAINERS SHALL BE ZINC-NICKEL PLATED IN ACCORDANCE WITH AMS 2417, TYPE 2, OR CADMIUM PLATED IN ACCORDANCE WI
16、TH AMS-QQ-P-416, TYPE I, CLASS 2, WITH A THICKNESS OF .0003 TO .0006. NOTES: 1. DIMENSIONS IN INCHES UNLESS OTHERWISE SPECIFIED. 2. DIMENSIONS TO BE MET AFTER PLATING. 3. REMOVE BURRS AND SHARP EDGES. 4. IN THE EVENT OF A CONFLICT BETWEEN THE TEXT OF THIS SPECIFICATION AND REFERENCES CITED HEREIN, T
17、HE TEXT OF THIS SPECIFICATION SHALL TAKE PRECEDENCE. 5. REFERENCED GOVERNMENT (OR NON-GOVERNMENT) DOCUMENTS OF THIS ISSUE LISTED IN THAT ISSUE OF THE DEPARTMENT OF DEFENSE INDEX OF SPECIFICATIONS AND STANDARDS (DoDISS) SPECIFIED IN THE SOLICITATION FORM A PART OF THIS SPECIFICATION TO THE EXTENT SPE
18、CIFIED HEREIN. 6. THE 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.
