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1、 AEROSPACE STANDARD (R) BEARING, ROLLER, NEEDLE, TRACK ROLLER, INTEGRAL STUD, TYPE VII, ANTIFRICTION, INCH AS21432 Copyright 2007 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
2、, 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: http:/www.sae.org ISSUED 2002-11 REV
3、ISED 2007-10 THIRD ANGLE PROJECTION CUSTODIAN: SAE ACBG/ROLLING ELEMENT SUBCMTE. REV. A FEDERAL SUPPLY CLASS 3110 AS21432 SHEET 1 OF 5 REV. A PROCUREMENT SPECIFICATION: AS39901 SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and en
4、gineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefrom, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it m
5、ay be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. RATIONALE AS21432 REV A IS A FIVE YEAR REVIEW AND UPDATE OF THIS SPECIFICATION. FIGURE AND TABLES REFORMATTED, CAD PLATE WARNING ADDED, MATERIALS AND HEAT TREATMENTS CLARIFIED. TABLE 1 - TOLERANCE VALUE d BAS
6、IC STUD DIA. ALLOWABLE DEVIATION FROM d OF SINGLE MEAN DIA., dmp ALLOWABLE DEVIATION FROM COTTER PIN DIA., d1 D BASIC OUTSIDE DIA. ALLOWABLE DEVIATION FROM D OF SINGLE MEAN DIA., Dmp ALLOWABLE DEVIATION FROM OUTER RING WIDTH C OVER INCL HIGH LOW HIGH LOW OVER INCL HIGH LOW HIGH LOW .1250 .5000 +0 -.
7、0015 +.010 -0 .4375 1.1250 +.0010 -.0005 +0 -.005 Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 20:38:37 MSTNo reproduction or networking permitted without license from IHS -,-,- AEROSPACE STANDARD (R) BEARING, ROL
8、LER, NEEDLE, TRACK ROLLER, INTEGRAL STUD, TYPE VII, ANTIFRICTION, INCH AS21432 SHEET 2 OF 5 REV. A MASS (APPROX) lb .014 + (GRIPLENGTH NO. x .0005) .031 + (GRIPLENGTH NO. x .0009) .043 + (GRIPLENGTH NO. x .0014) .081 + (GRIPLENGTH NO. x .0020) .125 + (GRIPLENGTH NO. x .0026) .190 + (GRIPLENGTH NO. x
9、 .0035) LOAD RATING AS A TRACK ROLLER lbf 395 470 830 1360 1930 3040 TRACK CAPACITY 40 HRC lbf 385 525 725 1100 1425 1975 1/ lb-in MAX. 8 20 42 55 150 205 LIMIT LOAD RATING lbf 790 940 1660 2720 3860 6080 TOTAL RADIAL PLAY MAX. .0017 .0017 .0017 .0017 .0017 .0017 r .031 .031 .047 .047 .047 .047 ra R
10、AD MIN. .022 .022 .022 .032 .032 .046 d1 COTTER PIN MALE .070 .076 .076 .106 .106 .106 B2 MIN. .211 .224 .234 .265 .283 .314 E MIN. .297 .359 .422 .500 .562 .625 B1 THREAD LENGTH REF. .344 .344 .359 .359 .422 .422 THREAD SIZE UNJF-3A .1900-32 .2500-28 .3125-24 .3750-24 .4375-20 .5000-20 C1 TRACK CON
11、TACT WIDTH MIN. .230 .230 .290 .380 .430 .530 C OUTER RING WIDTH .281 .281 .344 .469 .531 .656 D OUTER RING OUTSIDE DIA. .5000 .6875 .7500 .8750 1.0000 1.1250 d STUD .1900 .2500 .3125 .3750 .4375 .5000 FIRST DASH NO. -3 -4 -5 -6 -7 -8 1/ INSTALLATION TORQUE LUBRICATED THREADS Copyright SAE Internati
12、onal Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 20:38:37 MSTNo reproduction or networking permitted without license from IHS -,-,- AEROSPACE STANDARD (R) BEARING, ROLLER, NEEDLE, TRACK ROLLER, INTEGRAL STUD, TYPE VII, ANTIFRICTION, INCH AS
13、21432 SHEET 3 OF 5 REV. A REQUIREMENTS: 1. MATERIAL: OUTER RING AND NEEDLES: 52100 STEEL PER AMS 6440, AMS 6444, AMS 6447 OR ASTM A295/A295M. STUD: 52100 STEEL PER AMS 6440 OR AISI 8620 STEEL PER AMS 6274. ENDWASHER: 52100 STEEL PER AMS 6440 OR AISI 1010, 1018, 1117 OR 1213 STEEL PER AMS-STD-66. SEA
14、LS: ACETAL RESIN PER ASTM D 6778 POM 111 OR NYLON PER L-P-410, OR PTFE PER AMS 3652, OR PTFE IMPREGNATED FIBERGLASS PER AMS 3666. 2. HEAT TREAT: OUTER RING: HARDEN AND TEMPER TO 58-62 HRC. NEEDLES: HARDEN AND TEMPER TO 60-64 HRC. ENDWASHERS: HARDEN AND TEMPER TO 52-56 HRC. AISI 1010, 1018, 1117, OR
15、1213 HARDENED TO A DEPTH OF .005 MINIMUM WITH A SURFACE HARDNESS OF 51-59 HRC ON THE WEAR SURFACE. REMAINDER MAY BE SOFTENED FOR MANUFACTUING. STUD (RACEWAY): CARBURIZE WITH A SURFACE HARDNESS OF 60 HRC MINIMUM OR INDUCTION HARDEN TO 60 HRC MINIMUM. STUD (FLANGE): SURFACE HARDNESS 51 HRC MINIMUM. ST
16、UD (SHANK): HARDEN TO 36-46 HRC. 3. FINISH OR PLATING: OUTER RING: CHROME PLATE PER AMS-QQ-C-320, CLASS 2. OD AND OD CORNERS .0004 TO .0010 INCH THICKNESS. FACES MINIMUM .0003 INCH THICKNESS. ENDWASHERS: ALL EXPOSED SURFACES ZINC-NICKEL IN ACCORDANCE WITH AMS 2417, TYPE 2, OR CADMIUM PLATED IN ACCOR
17、DANCE WITH AMS-QQ-P-416, TYPE I, CLASS 2, WITH A THICKNESS OF .0003 TO .0006 INCH. STUD: ALL EXPOSED SURFACES ZINC-NICKEL IN ACCORDANCE WITH 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 INCH. 4. MARKING: THE MARKING SHALL CO
18、NSIST 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. 5. LUBRICANT: MIL-PRF-23827 TYPE 1 OR MIL-PRF-81322. ALL BEARINGS SHALL BE PREPACKED WITH GREASE CONFORMING TO MIL-PRF-23827 TYPE 1 UNLESS OTHERWISE SPECI
19、FIED. IF MIL-PRF-81322 IS REQUIRED, ADD THE SUFFIX “G” TO THE MS PART NUMBER. 6. PACKAGING: BEARINGS SHALL BE INDIVIDUALLY PACKAGED TO THE REQUIREMENTS OF MIL-DTL-197. PACKAGE MARKED WITH MANUFACTURERS NAME OR TRADEMARK, AND DATE OF LUBRICATION BY MONTH AND YEAR AND LOT CONTROL NUMBER. 7. TEMPERATUR
20、E: OPERATING TEMPERATURE RANGE -65F TO 250 F FOR MIL-PRF-23827 LUBRICATED BEARINGS. OPERATING TEMPERATURE RANGE -65F TO 350 F FOR MIL-PRF-81322 LUBRICATED BEARINGS. Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 20:
21、38:37 MSTNo reproduction or networking permitted without license from IHS -,-,- AEROSPACE STANDARD (R) BEARING, ROLLER, NEEDLE, TRACK ROLLER, INTEGRAL STUD, TYPE VII, ANTIFRICTION, INCH AS21432 SHEET 4 OF 5 REV. A 8. PART NUMBER: THE PART NUMBER SHALL CONSIST OF THE MS SPECIFICATION NUMBER FOLLOWED
22、BY A DASH NUMBER TAKEN FROM THE TABLE AND THE APPLICABLE SUFFIXES. EXAMPLE OF PART NUMBER: MS21432- 8 FEE 20 A G = CAM FOLLOWER NEEDLE BEARING .500 STUD, SEALED BEARING, LUBRICATOR IN FLANGED END OF STUD, 1.250 GRIP LENGTH, 1.672 STUD LENGTH WITHOUT COTTER PIN HOLE, WITH MIL-PRF-81322 GREASE. G = MI
23、L-PRF-81322 GREASE NO CODE = MIL-PRF-23827 TYPE 1 GREASE A = NO COTTER PIN HOLE (NOT REQUIRED FOR TYPES “T” OR “TEE”) NO CODE = COTTER PIN HOLE GRIP LENGTH IN .0625 INCH INCREMENTS F = UNSEALED WITH LUBRICATOR IN FLANGED END OF STUD T = UNSEALED WITH LUBRICATOR IN THREADED END OF STUD, NO COTTER PIN
24、 HOLE “ “ = UNSEALED WITHOUT LUBRICATOR FEE = SEALED WITH LUBRICATOR IN FLANGED END OF STUD TEE = SEALED WITH LUBRICATOR IN THREADED END OF STUD, NO COTTER PIN HOLE R = SEALED BEARING WITHOUT LUBRICATOR STUD DIAMETER IN .0625 INCH INCREMENTS NOTES: NOTICE THIS DOCUMENT REFERENCES A PART WHICH CONTAI
25、NS CADMIUM AS A PLATING MATERIAL. CONSULT LOCAL OFFICIALS IF YOU HAVE QUESTIONS CONCERNING CADMIUMS USE. 1. MS21432-3 MAY BE CODED FOR LUBRICATION FACILITIES IN THE FLANGED END ONLY. LUBRICATION FITTING FOR THE MS21432-3 MAY BE SHIPPED SEPARATELY AND INSTALLED ON ASSEMBLY. LUBRICATORS INSTALLED IN T
26、HE THREADED END OF STUD SHALL BE FLUSH. LUBRICATORS INSTALLED IN THE FLANGED END OF STUD ON MS21432-3 AND -4 MAY EXTEND .05 INCH BEYOND THE FLANGED END THEREBY NECESSITATING AN INCREASE OF .05 INCH, ON ALL OTHER SIZES THE LUBRICATOR SHALL BE FLUSH OR INDENTED. 2. THE TRACK BRINELL CAPACITY IS CRITIC
27、AL IN RESPECT TO THE ROLLER CAPACITY OF THE BEARING. AN INCREASE IN HARDNESS OF THE TRACK WILL INCREASE THE BRINELL CAPACITY OF THE TRACK, BUT IN NO CASE SHOULD THE ROLLING CAPACITY OF THE BEARING BE EXCEEDED. 3. THE LIMIT LOAD RATING CAN BE DEFINED AS THE MAXIMUM LOAD WHICH CAN BE APPLIED TO A BEAR
28、ING WITHOUT IMPAIRING THE SUBSEQUENT FUNCTIONING OF THE BEARING IN AIRFRAME APPLICATIONS. THE ULTIMATE OR STATIC FRACTURE LOAD RATING IS NOT LESS THAN 1.5 TIMES THE LIMIT LOAD RATING. TO FULLY REALIZE THIS RATING, COMPUTATION MUST BE PROVIDED FOR STUD DEFLECTION IN ORDER TO ASSURE FULL TRACK CONTACT
29、 UNDER LOAD. 4. FOR INSPECTION PURPOSES NOMINAL STUD LENGTH IS THE SUM OF NOMINAL GRIPLENGTH AND THE THREAD LENGTH (“B1” DIMENSION). 5. BEARING SHALL BE PREPACKED WITH GREASE AS CODED. Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Re
30、sale, 12/04/2007 20:38:37 MSTNo reproduction or networking permitted without license from IHS -,-,- AEROSPACE STANDARD (R) BEARING, ROLLER, NEEDLE, TRACK ROLLER, INTEGRAL STUD, TYPE VII, ANTIFRICTION, INCH AS21432 SHEET 5 OF 5 REV. A 6. ALL DIMENSIONS TO MEET AFTER PLATING. 7. THE CHANGE BAR ( l ) L
31、OCATED 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 SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 20:38:37 MSTNo reproduction or networking permitted without license from IHS -,-,-