SAE-AS-81820-1B-2007.pdf

AEROSPACE STANDARD BEARING, PLAIN, SELF-ALIGNING, SELF- LUBRICATING, LINED BORE, LOW SPEED, NARROW, GROOVED RACE, -65 TO +325 °F AS81820/1 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, 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 1998-04 REVISED 2007-10 THIRD ANGLE PROJECTION CUSTODIAN: SAE AIRFRAME CONTROL BEARINGS GROUP REV. B FEDERAL SUPPLY CLASS 3120 AS81820/1 SHEET 1 OF 4 REV. B PROCUREMENT SPECIFICATION: AS81820 SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering 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 may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. RATIONALE THE REASON FOR UPDATING THIS DOCUMENT IS TO INCORPORATE AN “A” PART NUMBER DESIGNATION FOR A NEW LINER SYSTEM THAT HAS THE SAME WEAR LIMIT BUT 4 TIMES THE LIFE OF THE STANDARD LINER SYSTEM. FIGURE 1 TABLE 1 - DIMENSIONS AND STRENGTHS STATIC LIMIT LOAD NO-LOAD ROTATIONAL BREAKAWAY TORQUE IN-LB PART NO.* B +.0000 .0010 D +.0000 .0005 H ±.005 P +.000 .010 Qº (REF) W +.000 .002 E +.000 .008 RADIAL LB AXIAL LB OSCIL- LATING LOAD LB STANDARD * “K“ TYPE WT LB MAX (REF) M81820/1- 4 .2510 .6562 .250 .025 10 .343 .594 5550 430 2650 1.0- 5.0 0-0.5 .020 M81820/1- 5 .3135 .7500 .281 .035 10 .375 .660 7700 700 3700 1.0-15.0 0-1.0 .030 M81820/1- 6 .3760 .8125 .312 .035 9 .406 .71210200 1100 4900 1.0-15.0 0-1.0 .040 M81820/1- 7 .4385 .9062 .343 .035 8 .437 .80612950 1400 6700 1.0-15.0 0-1.0 .050 M81820/1- 8 .5010 1.0000 .390 .055 8 .500 .87617250 2100 8250 1.0-15.0 0-1.0 .070 M81820/1- 9 .5635 1.0937 .437 .055 8 .562 .97022150 368010600 1.0-15.0 0-1.0 .090 M81820/1-10 .6260 1.1875 .500 .055 8 .6251.06327700 472013250 1.0-15.0 0-1.0 .120 M81820/1-12 .7510 1.4375 .593 .055 8 .7501.31340600 675019400 1.0-15.0 0-1.0 .210 M81820/1-14 .8760 1.5625 .703 .055 8 .8751.43855950 935026750 1.0-25.0 0-2.0 .270 M81820/1-16 1.0010 1.7500 .797 .055 9 1.0001.62673800 1216035250 1.0-25.0 0-2.0 .390 * SEE REQUIREMENT 5 “NO-LOAD TORQUE“ AND NOTE 5. * FOR TYPE A BEARINGS, THE CORRESPONDING PART NUMBER WILL HAVE AN “A” DESIGNATOR AFTER THE MS PART NUMBER (E.G., M81820/1A-5). Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 19:52:29 MSTNo reproduction or networking permitted without license from IHS -,-,- AEROSPACE STANDARD BEARING, PLAIN, SELF-ALIGNING, SELF- LUBRICATING, LINED BORE, LOW SPEED, NARROW, GROOVED RACE, -65 TO +325 °F AS81820/1 SHEET 2 OF 4 REV. B TABLE 2 - OVERSIZE BEARING DIMENSIONS 1/ 2/ RESTRICTED USAGE FOR REPAIR WORK ONLY .010” AND .020” OVERSIZE OUTSIDE DIAMETER FOR REPLACEMENT OF BEARINGS SHOWN ON SHEET 1 PART NO. 3/ NOMINAL SIZE 1ST OVERSIZE D PART NO. 3/ NOMINAL SIZE 2ND OVERSIZE D M81820/1- 4T .2500 .6662 M81820/1- 4U .2500 .6762 M81820/1- 5T .3125 .7600 M81820/1- 5U .3125 .7700 M81820/1- 6T .3750 .8225 M81820/1- 6U .3750 .8325 M81820/1- 7T .4375 .9162 M81820/1- 7U .4375 .9262 M81820/1- 8T .5000 1.0100 M81820/1- 8U .5000 1.0200 M81820/1- 9T .5625 1.1037 M81820/1- 9U .5625 1.1137 M81820/1-10T .6250 1.1975 M81820/1-10U .6250 1.2075 M81820/1-12T .7500 1.4475 M81820/1-12U .7500 1.4575 M81820/1-14T .8750 1.5725 M81820/1-14U .8750 1.5825 M81820/1-16T 1.0000 1.7600 M81820/1-16U 1.0000 1.7700 1/ BEFORE INITIATING A REPAIR PROCEDURE TO USE AN OVERSIZE BEARING, APPROVAL FOR MODIFYING AND REIDENTIFYING THE BEARING HOUSING MUST BE OBTAINED FROM THE COGNIZANT ENGINEERING AUTHORITY. 2/ REFER TO NAS0331 FOR INSTALLATION PROCEDURE AND STAKING FORCES. 3/ FOR TYPE A BEARINGS, THE CORRESPONDING PART NUMBER WILL HAVE AN “A” DESIGNATION AFTER THE MS PART NUMBER (E.G., M81820/1A-5). REQUIREMENTS: 1. MATERIAL: BALL: PH13-8Mo STEEL ALLOY PER AMS 5629, CONDITION H1000. RACE: 17-4 PH STEEL ALLOY PER AMS 5643. LINER: PTFE SHALL BE INCLUDED IN THE LINER. 2. SURFACE TEXTURE: BALL DIA Ra 8 MAX; BALL FACES AND RACE DIA Ra 32 MAX; ALL OTHER METALLIC SURFACES Ra 125 MAX. LINER SURFACES ARE EXEMPT FROM SURFACE TEXTURE MEASUREMENTS. 3. SURFACE FINISH: RACE: PLATING, WHEN SPECIFIED, SHALL BE ZINC-NICKEL PLATING PER AMS 2417, TYPE 2 OR CADMIUM PLATING PER AMS-QQ-P-416, TYPE II, CLASS 2 WITH A THICKNESS RANGE OF 0.0003 TO 0.0006 in. PLATE ON THE OUTSIDE DIAMETER SURFACE AND ON THE FLAT BETWEEN THE OUTSIDE DIAMETER AND THE GROOVE. PLATING RUNOUT MAY OCCUR EITHER IN THE GROOVE OR IN THE AREA BETWEEN THE GROOVE AND THE BALL. THE PTFE LINER IN THE OUTER RACE INSIDE DIAMETER AND IN THE BALL BORE SHALL BE PROTECTED FROM EXPOSURE TO PLATING SOLUTIONS DURING PROCESSING. BALL: PASSIVATE BALL AS DETAIL PER AMS 2700, METHOD 1 (NITRIC ACID) OR METHOD 2 (CITRIC ACID), OR ASTM A 967 CITRIC 1, CITRIC 2, AND CITRIC 3 ARE ACCEPTABLE. CHROME PLATING PER AMS 2460 IS ALLOWED. BALL SURFACE FINISH SHALL BE AS ORIGINALLY QUALIFIED. 4. HARDNESS: BALL: HRc 43 MIN; RACE: HRc 28 MIN, HRc 37 MAX BEFORE SWAGING. 5. NO-LOAD TORQUE: WHEN THE LETTER “K” IS PRESENT IN THE PART NUMBER, LOWER VALUES OF NO-LOAD TORQUE ARE SPECIFIED PER TABLE 1. IF THE MEASURED TORQUE OF A “K” TYPE BEARING IS LESS THAN 0.1 in-lb, THE INTERNAL RADIAL CLEARANCE SHALL BE MEASURED AND SHALL NOT EXCEED THE VALUES IN TABLE 3. THESE REQUIREMENTS APPLY TO THE TORQUE AND INTERNAL PLAY BETWEEN THE SPHERICAL BALL AND THE RACE. THIS STANDARD DOES NOT DEFINE REQUIREMENTS FOR TORQUE OR INTERNAL PLAY BETWEEN THE BEARING BORE AND SHAFT. Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 19:52:29 MSTNo reproduction or networking permitted without license from IHS -,-,- AEROSPACE STANDARD BEARING, PLAIN, SELF-ALIGNING, SELF- LUBRICATING, LINED BORE, LOW SPEED, NARROW, GROOVED RACE, -65 TO +325 °F AS81820/1 SHEET 3 OF 4 REV. B TABLE 3 - INTERNAL CLEARANCE DASH NO. MAXIMUM RADIAL PLAY MAXIMUM AXIAL PLAY -4K THRU -12K .0007 in .0028 in -14K THRU -16K .0010 in .0040 in 6. BREAK SHARP EDGES AND CORNERS AND REMOVE ALL BURRS AND SLIVERS. 7. DIMENSIONS ARE IN INCHES. UNLESS OTHERWISE SPECIFIED, TOLERANCES ARE; DECIMALS ±.010 AND ANGLES ±0.5°. NOTES: NOTICE THIS DOCUMENT REFERENCES A PART WHICH CONTAINS CADMIUM AS A PLATING MATERIAL. CONSULT LOCAL OFFICIALS IF YOU HAVE QUESTIONS CONCERNING CADMIUM'S USE. 1. WHEN TESTED TO THE FLUID CONTAMINATION AND SUB-ZERO TEMPERATURE REQUIREMENTS OF THE PROCUREMENT SPECIFICATION, THE OSCILLATING LOAD SHALL BE DECREASED TO 75% OF THE SPECIFIED LOAD. 2. WHEN FLUIDS AND ELEVATED TEMPERATURES (ABOVE 200 °F) ARE BOTH PRESENT IN AN APPLICATION, THEN REDUCTIONS IN OPERATING LOADS OR BEARING LIFE MAY BE REQUIRED. 3. DASH NUMBER DESIGNATES NOMINAL BORE DIA IN SIXTEENTHS OF AN INCH. 4. DIMENSION “øD” TO BE MET AFTER PLATING. DIMENSION “H“ TO BE MET BEFORE PLATING WHEN APPLICABLE. 5. EXAMPLE OF PART NO. M81820/1 A -6 P K T = .375 NOMINAL BORE DIA, PH13-8MO BALL MATERIAL, ZINC-NICKEL PLATED, LOW TORQUE, .010 in OVERSIZE O.D. (DIMENSION D). ABSENCE OF THE LETTERS “ T “ AND “ U “ INDICATE STANDARD OUTER DIAMETER ( D), (SEE TABLE 1). T = .010” OVERSIZE D (FOR REPAIR ONLY, SEE TABLE 2). U = .020” OVERSIZE D (FOR REPAIR ONLY, SEE TABLE 2). ABSENCE OF THE LETTER “ K “ INDICATES STANDARD BREAKAWAY TORQUE (SEE TABLE 1). LETTER “ K “ INDICATES LOW BREAKAWAY TORQUE (SEE TABLE 1). ABSENCE OF THE LETTER “ P “ INDICATES NO PLATING. LETTER “ P “ INDICATES ZINC-NICKEL OR CADMIUM PLATING (SEE REQUIREMENT 3). SIZE BORE DIAMETER (DASH NO. FROM TABLE 1). ABSENCE OF THE LETTER “ A “ INDICATES TESTED TO 25,000 CYCLES LETTER “ A “ INDICATES TESTED TO 100,000 CYCLES BASIC PART NUMBER. 6. IN THE EVENT OF A CONFLICT BETWEEN THE TEXT OF THIS STANDARD AND THE REFERENCES CITED HEREIN, THE TEXT OF THIS STANDARD SHALL TAKE PRECEDENCE. Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 19:52:29 MSTNo reproduction or networking permitted without license from IHS -,-,- AEROSPACE STANDARD BEARING, PLAIN, SELF-ALIGNING, SELF- LUBRICATING, LINED BORE, LOW SPEED, NARROW, GROOVED RACE, -65 TO +325 °F AS81820/1 SHEET 4 OF 4 REV. B 7. REFERENCED GOVERNMENT (OR NON-GOVERNMENT) DOCUMENTS OF THE 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 STANDARD TO THE EXTENT SPECIFIED HEREIN. 8. 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. Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 19:52:29 MSTNo reproduction or networking permitted without license from IHS -,-,-