1、 AEROSPACE STANDARD (R) BEARING, ROLLER, ROD END, EXTERNAL THREAD, SELF-ALIGNING, ANTI-FRICTION, AIRFRAME, HEAVY DUTY, TYPE II, -67 TO 350F, SEALED AS21221 Copyright 2005 SAE International All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted
2、, in 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: custsvcsae.org SAE WEB ADDRESS: htt
3、p:/www.sae.org ISSUED 1998-05REVISED 2005-08 THIRD ANGLE PROJECTION CUSTODIAN: SAE ACBG REV. A FEDERAL SUPPLY CLASS3110 AS21221 SHEET 1 OF 2 REV.A SAE TechnicalStandards Board Rules provide that: “This report is published by SAE toadvance thestate of technical andengineering sciences. Theuse ofthisr
4、eportisentirelyvoluntary, 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 invites
5、 yourwritten commentsandsuggestions. 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 OFFICIALS ON APPLICABLE HEALTH AND ENVIRONMENTAL
6、 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. TABLE I. DIMENSIONS AND LOADS LIMIT LOAD RAT
7、ING (LBS) MS DASH NO. A .005 B +.0000 -.0005 D +.000 -.050 E UNJF-3A THREAD F .015 H +.000 -.015 L +.060 -.000 N .005 W +.000 -.005 RADIAL AXIAL RADIAL DYNAMIC LOAD RATING (LBS) NET WT (LBS) -4G .420 .2500 1.080 .375-24 1.840 .360 1.000 .500 2,730 270 2,270 .11 -5G .560 .3125 1.410 .500-20 2.410 .46
8、0 1.310 .687 4,970 490 4,120 .27 -6G .660 .3750 1.660 .625-18 3.030 .550 1.750 .812 7,910 790 6,570 .47 -8G .860 .5000 2.270 .875-14 4.030 .720 2.310 1.062 14,000 1,400 11,700 1.13 -10G 1.050 .6250 2.800 1.000-12 4.660 .850 2.560 .015 1.250 22,100 2,210 18,400 1.94 1/ THESE BEARINGS ARE SELF-ALIGNIN
9、G FOR 10 IN ANY DIRECTION. REQUIREMENTS 1. MATERIAL: INNER RING AND ROLLERS: 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. A
10、LL BEARINGS SHALL BE PACKED WITH GREASE CONFORMING TO MIL-PRF-81322 UNLESS 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
11、 MS21220 DASH NUMBER. MIL-PRF-23827 SHALL NOT BE USED FOR OPERATION WHERE TEMPERATURES EXCEED 250F. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AEROSPACE STANDARD (R) BEARING, ROLLER, ROD END, EX
12、TERNAL THREAD, SELF-ALIGNING, ANTI-FRICTION, AIRFRAME, HEAVY DUTY, TYPE II, -67 TO 350F, SEALED AS21221 REV. A AS21221 SHEET 2 OF 2 REV.A 3. SEALS: POLYTETRAFLUOROETHYLENE PER AMS 3652 OR POLYTETRAFLUOROETHYLENE SHEET, GLASS FABRIC REINFORCED PER AMS 3666 OR POLYETHER-ESTER PER ASTM D4550, GROUP 4,
13、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 ANSI/ASME B46.1. 6. BEARING RATINGS ARE FOR OPERATION UP TO 250F MAX. FOR OPERAT
14、ION UP TO 350F, 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: MS21221-4 G K L H = BEARING, ROD END, ROLLER, SELF-ALIGNING, .2500 BORE, LUBRICATION FITTING WITH MIL-PRF-
15、23827 LUBRICANT, NASM14198 KEYWAY, .375-24UNJF-3A LEFT HAND EXTERNAL THREAD PREPACKED WITH MIL-PRF-23827 LUBRICANT (SEE REQUIREMENT 2) LEFT HAND THREAD DESIGNATOR NASM 14198 KEYWAY DESIGNATOR LUBRICATION FITTING DESIGNATOR DASH NUMBER MILITARY SPECIFICATION SHEET NUMBER WHEN THE DESIGNATOR IS NOT AP
16、PLICABLE, IT SHALL BE OMITTED FROM THE PART NUMBER. 8. PLATING: ALL EXTERNAL SURFACES EXCEPT BORE, SEALS AND RETAINERS SHALL BE ZINC-NICKEL PLATED PER AMS 2417 TYPE 2 OR CADMIUM PLATED IN ACCORDANCE WITH AMS-QQ-P-416, TYPE I, CLASS 2, WITH A THICKNESS OF .0003 TO .0006. EXTERNAL THREADED AREAS SHALL
17、 BE .0002 TO .0005 INCHES THICK. 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, THE TEXT OF THIS SPECIFICATION SHALL T
18、AKE 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 SPECIFIED HEREIN. 6. THE CHANGE BAR ( l
19、) 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. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
