1、AEROSPACE STANDARD BEARING, BALL, ROD END, DOUBLE ROW, PRECISION, EXTERNAL THREAD, SELF-ALIGNING, AIRFRAME, TYPE II, -65 TO 300 F AS21151Copyright 2009 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
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3、org ISSUED 1998-01REVISED 2009-12THIRD ANGLE PROJECTION CUSTODIAN: SAE AIRFRAME CONTROL BEARINGS GROUP REV.EFEDERAL SUPPLY CLASS 3110 AS21151SHEET 1 OF 3REV. EPROCUREMENT SPECIFICATION: AS6039SAE TechnicalStandards Board Rules provide that: “This report is published by SAE toadvance thestate of tech
4、nical andengineering sciences. Theuse of thisreport 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 ma
5、y be reaffirmed, revised, orcancelled. SAE invites yourwritten commentsandsuggestions. SAE values your input. To provide feedbackon this Technical Report, please visit http:/www.sae.org/technical/standards/AS21151ERATIONALE CORRECTION. FIGURE 1 SPECIFIED A .020/.005 X 45 DEGREE BORE CHAMFER AS A CON
6、STANT BUT TABLE 1 INDICATES THAT CHAMFER AS “N” AND VARIES DEPENDING ON THE DASH NUMBER. FIGURE 1 TABLE 1 - DIMENSIONS AND TOLERANCES MS21151 DASH NUMBER (c) BORE SIZE NOM.A B C D E H N G TTHREAD WWT LB APPROX .010 +.0000 .0003 .031 .010 NOM .010 +.015 .000 MIN. UNJF-3A +.000 .005 -1 3/16 1.375 .190
7、0 .750 .781 .422 .328 .005 .276 .1900-32 LH .437 .04 -2 .1900-32 RH -3 2.031 1.313 .969 .500 .407 .299 .3750-24 RH .500 .05 -4 1.375 .750 .781 .390 .328 .276 .437 -5 .3750-24 LH -6 1.812 .938 .562 .438 .307 .2500-28 RH .500 .10 -7 1.563 1.000 .344 .328 .276 .437 .05 -8 1/4 1.875 .2500 1.125 .938 .46
8、9 .438 .340 .3750-24 RH .593 .10 -9 .3750-24 LH -10 5/16 2.438 .3125 1.563 1.250 .500 .656 .015 .501 .3750-24 RH .870 .24 -11 .4375-20 RH -12 .6250-18 RH -13 5/8 2.750 .6250 1.500 2.000 .500 .938 .015 .875 .6250-18 RH 1.125 .71 AEROSPACE STANDARD AS21151SHEET 2 OF 3REV. EBEARING, BALL, ROD END, DOUB
9、LE ROW, PRECISION, EXTERNAL THREAD, SELF-ALIGNING, AIRFRAME, TYPE II, -65 TO 300 F TABLE 2 - ENGINEERING DATA MS21151 DASH NUMBER (c) RADIAL STRENGTH AXIAL STRENGTH RADIAL LOAD RATING 10 000 COMPLETE 90 CYCLES (e) (f) MAXIMUM STARTING TORQUE LIMIT LOAD LBF FRACTURE LOAD LBF LIMIT LOAD LBF FRACTURE L
10、OAD LBF CASE I CASE II IN-OZ -1 1000 1500 200 300 1000 1000 3.0 -2 -3 1200 1800 240 360 1200 1200 -4 1000 1500 200 300 1000 1000 -5 -6 -7 -8 1720 2580 345 520 1720 1720 4.0 -9 -10 2920 4375 585 880 2920 2600 6.0 -11 -12 -13 7090 10 600 1420 2130 6160 5340 8.0 REQUIREMENTS: (a) A RADIUS GIVING THE SA
11、ME FILLET CLEARANCE WILL BE ACCEPTABLE. (b) THREADS SHALL CONFORM TO UNJF-3A IN ACCORDANCE WITH AS8879. EXTERNAL THREADS SHALL BE FULLY FORMED BY A SINGLE ROLLING PROCESS. THREAD LENGTH SHALL BE TOTAL LENGTH “C” ALLOWING A MAXIMUM OF TWO IMPERFECT THREADS. (c) KEYWAY SLOT IF REQUIRED SHALL BE IN ACC
12、ORDANCE WITH NASM14198 AND SHALL BE DESIGNATED BY ADDING SUFFIX “C” TO THE DASH NUMBER (-3 THROUGH -13 ONLY). (d) 10 DEGREES MIN. ALLOWED MISALIGNMENT IN EITHER DIRECTION SHALL OCCUR WITHOUT INTERFERENCE BETWEEN BALL HOUSING AND SURFACES INDICATED BY DIMENSION “W”. (e) CASE I - LOAD FIXED WITH RESPE
13、CT TO OUTER RACE (AVERAGE LIFE RATING). CASE II - LOAD FIXED WITH RESPECT TO INNER RACE (AVERAGE LIFE RATING). (f) THESE RATINGS ARE FOR OPERATIONS UP TO 250 F MAXIMUM WHEN SUBJECTED TO OPERATION ABOVE 250 F. THE RATINGS SHOULD BE REDUCED BY 20%. NOTES: NOTICE THIS DOCUMENT REFERENCES A PART WHICH C
14、ONTAINS CADMIUM AS A PLATING MATERIAL. CONSULT LOCAL OFFICIALS IF YOU HAVE QUESTIONS CONCERNING CADMIUMS USE. 1. FOR DESIGN FEATURE PURPOSES, THIS STANDARD TAKES PRECEDENCE OVER ANY OTHER DOCUMENTS REFERENCED HEREIN. 2. REFERENCED DOCUMENTS SHALL BE OF THE ISSUE IN EFFECT ON DATE OF INVITATION FOR B
15、ID. 3. RADIAL CLEARANCE: .0000 TO .0004 INCHES UNDER 5.5 LB FULLY REVERSING GAGE LOAD. 4. AXIAL CLEARANCE: .0000 TO .003 INCHES UNDER 5.5 LB FULLY REVERSING GAGE LOAD. AEROSPACE STANDARD AS21151SHEET 3 OF 3REV. EBEARING, BALL, ROD END, DOUBLE ROW, PRECISION, EXTERNAL THREAD, SELF-ALIGNING, AIRFRAME,
16、 TYPE II, -65 TO 300 F 5. MATERIAL: INNER RACE AND BALLS: AISI E52100 STEEL PER AMS6440 OR AMS6444; BALLS IAW ASTM F 2215 ROD END BODY: AISI 4130 STEEL PER AMS-S-6758, OR AISI 8620 STEEL PER AMS6274. SEALS: POLYTETRAFLOURETHYLENE PER AMS3652 OR AMS3666 OR POLYETHERESTER PER ASTM D 4550, GROUP 4, CLA
17、SS 1, GRADE 1. SEAL RETAINERS - STEEL CORROSION RESISTANCE, AISI 300 OR AISI 400 SERIES STEEL. 6. HEAT TREATMENT: INNER RACE AND BALLS: 60-66 HRC ROD END BODY RACEWAY: 59-63 HRC; STABILIZE FOR OPERATION AT 250 F. THE ROD END BODY RACEWAY SHALL BE CASE HARDENED TO ACHIEVE AN EFFECTIVE CASE DEPTH (50
18、HRC POINT) FROM A MINIMUM OF 25% TO A MAXIMUM OF 50% OF THE RING THICKNESS. THE ROD END SHANK SHALL HAVE A HARDNESS OF 92.5 HRB MINIMUM TO 45 HRC MAXIMUM AND THE ROD END HEAD O.D. SHALL HAVE A HARDNESS OF 32 TO 48 HRC. 7. FINISH CODE: “ ” (NO CODE) INDICATES CADMIUM PLATE PER AMS-QQ-P-416, TYPE I, C
19、LASS 2. “E” INDICATES ZlNC-NlCKEL PLATE PER AMS2417, TYPE 2 8. LUBRICANT: ALL BEARINGS SHALL BE PREPACKED 80% TO 100% FULL WITH GREASE QUALIFIED TO MIL-PRF-81322 OR MIL-PRF-23827 TYPE I. IF MIL-PRF- 23827 IS REQUIRED ADD THE SUFFIX “G” TO THE MS PART NUMBER AND LIMIT BEARING OPERATION TO NOT MORE TH
20、AN 250 F. 9. REMOVE ALL BURRS AND SHARP EDGES. 10. SURFACE ROUGHNESS: RACEWAYS AND BALLS SHALL NOT EXCEED 8 (Ra.), SHANK 63 (Ra) WHERE INDICATED, ALL OTHER MACHINED SURFACES SHALL NOT EXCEED 125 (Ra). AS FORGED SURFACES ON OUTER SURFACE OF THE ROD END BODY ARE ACCEPTABLE. 11. DIMENSIONS IN INCHES, U
21、NLESS OTHERWISE SPECIFIED. 12. DIMENSIONS TO BE MET AFTER PLATING. 13. EXAMPLE OF COMPLETE PART NUMBER: MS21151 - 4 C G E “ ” = (NO CODE) CADMIUM PLATE “E” = ZINC-NICKEL PLATE “ “ = GREASE PER MIL-PRF-81322 “G” = GREASE PER MIL-PRF-23827 “ “ = NO KEYWAY “C” = KEYWAY SLOT PER NASM14198 (DASH NO -3 TH
22、ROUGH -13 ONLY) DASH NO. (SEE TABLE 1) BASIC MS P/N 14. THE POINT REPRESENTING THE CENTER OF SELF-ALIGNMENT MOTION SHALL BE COINCIDENT WITH THE AXIS OF THE ROD END WITHIN .010 INCHES. 15. A CHANGE BAR ( l ) LOCATED IN THE LEFT MARGIN IS FOR THE CONVENIENCE OF THE USER IN LOCATING AREAS WHERE TECHNIC
23、AL 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.
