1、AEROSPACE STANDARDBEARING, PLAIN, SELF-ALIGNING, SELF-LUBRICATING, LINED BORE, LOW SPEED, NARROW,GROOVED RACE, -65 TO +325 FAS81820/1Copyright 2014 SAE InternationalAll rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any
2、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: +1 724-776-4970 (outside USA)Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.orgI
3、SSUED1998-04REVISED2014-07THIRD ANGLE PROJECTIONCUSTODIAN: AIRFRAME CONTROL BEARINGS GROUPREV.DFEDERAL SUPPLY CLASS3120AS81820/1SHEET 1 OF 4REV.DPROCUREMENT SPECIFICATION: AS81820SAE Technical Standards BoardRules providethat:“This reportis publishedbySAE toadvancethestateoftechnicalandengineering s
4、ciences. The use of thisreport isentirelyvoluntary, andits applicability andsuitability foranyparticularuse,includingany patentinfringementarisingtherefrom,is thesoleresponsibility oftheuser.”SAE reviews eachtechnical reportatleastevery fiveyears atwhichtimeitmay berevised,reaffirmed,stabilized,orca
5、ncelled.SAE invites yourwrittencommentsandsuggestions.SAE values your input. To provide feedbackon this Technical Report, please visit http:/www.sae.org/technical/standards/AS81820/1DRATIONALETHE REASON FOR UPDATING THIS SPECIFICATION IS TO ADD A 440C BALL MATERIAL OPTION AND REMOVE CHROME PLATING A
6、S AN OPTION.FIGURE 1 - PART CONFIGURATIONTABLE 1 - DIMENSIONS AND STRENGTHSPARTNO.*IB+.0000.0010ID+.0000.0005H.005P+.000.010Q(REF)W+.000.002IE+.000.008STATIC LIMITLOADOSCIL-LATINGLOADLBNO-LOADROTATIONALBREAKAWAY TORQUEIN-LBWTLBMAX(REF)RADIALLBAXIALLB STANDARD*“K“ TYPEM81820/1- 4 .2510 .6562 .250 .02
7、5 10 .343 .594 5550 430 2650 1.0- 5.0 0- .5 .020M81820/1- 5 .3135 .7500 .281 .035 10 .375 .660 7700 700 3700 1.0-15.0 0-1.0 .030M81820/1- 6 .3760 .8125 .312 .035 9 .406 .712 10 200 1100 4900 1.0-15.0 0-1.0 .040M81820/1- 7 .4385 .9062 .343 .035 8 .437 .806 12 950 1400 6700 1.0-15.0 0-1.0 .050M81820/1
8、- 8 .5010 1.0000 .390 .055 8 .500 .876 17 250 2100 8250 1.0-15.0 0-1.0 .070M81820/1- 9 .5635 1.0937 .437 .055 8 .562 .970 22 150 3680 10 600 1.0-15.0 0-1.0 .090M81820/1-10 .6260 1.1875 .500 .055 8 .625 1.063 27 700 4720 13 250 1.0-15.0 0-1.0 .120M81820/1-12 .7510 1.4375 .593 .055 8 .750 1.313 40 600
9、 6750 19 400 1.0-15.0 0-1.0 .210M81820/1-14 .8760 1.5625 .703 .055 8 .875 1.438 55 950 9350 26 750 1.0-25.0 0-2.0 .270M81820/1-16 1.0010 1.7500 .797 .055 9 1.000 1.626 73 800 12 160 35 250 1.0-25.0 0-2.0 .390* SEE REQUIREMENT 5 “NO-LOAD TORQUE“ AND NOTE 5.* FOR TYPE A BEARINGS, THE CORRESPONDING PAR
10、T NUMBER WILL HAVE AN “A” DESIGNATOR AFTER THE PARTNUMBER (E.G., M81820/1A-5).AEROSPACE STANDARDAS81820/1SHEET 2 OF 4REV.DBEARING, PLAIN, SELF-ALIGNING, SELF-LUBRICATING, LINED BORE, LOW SPEED, NARROW,GROOVED RACE, -65 TO +325 FTABLE 2 - OVERSIZE BEARING DIMENSIONS 1/ 2/RESTRICTED USAGE FOR REPAIR W
11、ORK ONLY.010 INCH AND .020 INCH OVERSIZE OUTSIDE DIAMETER FORREPLACEMENT OF BEARINGS SHOWN ON SHEET 1PARTNO. 3/NOMINALSIZE1STOVERSIZE(.010) IDPARTNO. 3/NOMINALSIZE2NDOVERSIZE(.020) IDM81820/1- 4T .2500 .6662 M81820/1- 4U .2500 .6762M81820/1- 5T .3125 .7600 M81820/1- 5U .3125 .7700M81820/1- 6T .3750
12、.8225 M81820/1- 6U .3750 .8325M81820/1- 7T .4375 .9162 M81820/1- 7U .4375 .9262M81820/1- 8T .5000 1.0100 M81820/1- 8U .5000 1.0200M81820/1- 9T .5625 1.1037 M81820/1- 9U .5625 1.1137M81820/1-10T .6250 1.1975 M81820/1-10U .6250 1.2075M81820/1-12T .7500 1.4475 M81820/1-12U .7500 1.4575M81820/1-14T .875
13、0 1.5725 M81820/1-14U .8750 1.5825M81820/1-16T 1.0000 1.7600 M81820/1-16U 1.0000 1.77001/ BEFORE INITIATING A REPAIR PROCEDURE TO USE AN OVERSIZE BEARING,APPROVAL FOR MODIFYING AND REIDENTIFYING THE BEARING HOUSING MUSTBE OBTAINED FROM THE COGNIZANT ENGINEERING AUTHORITY.2/ REFER TO NAS0331 FOR INST
14、ALLATION PROCEDURE AND STAKING FORCES.3/ FOR TYPE A BEARINGS, THE CORRESPONDING PART NUMBER WILL HAVE AN“A” DESIGNATION AFTER THE PART NUMBER (E.G., M81820/1A-5).REQUIREMENTS:1. MATERIAL:BALL: 440C (AMS5630, AMS5880, OR AMS5618) OR PH13-8 CRES PER AMS5629 (SEE NOTE 5 FOR P/N EXAMPLE ANDDESIGNATION).
15、RACE: 17-4PH CRES PER AMS5643.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, SHAL
16、L BE ZINC-NICKEL PLATING PER AMS2417, TYPE 2, GRADE A OR B (ONLY GRADE B SHALL BE PERMITTED ON BEARINGS MANUFACTURED AFTER JUNE 1, 2015) OR CADMIUM PLATING PER AMS-QQ-P-416, TYPE II, CLASS 2 WITH A THICKNESS RANGE OF .0003 TO .0006 INCH. PLATING SHALL BE ON THE OUTSIDE DIAMETER SURFACE AND ON THE FL
17、AT BETWEEN THE OUTSIDE DIAMETER AND THE GROOVE. THE PLATING RUNOUT SHALL OCCUR EITHER IN THE GROOVE OR ON THE SIDE FACE AREA BETWEEN THE GROOVE AND THE BALL. SEE NOTE 5 FOR P/N EXAMPLE AND DESIGNATION.THE PTFE LINER IN THE OUTER RACE INSIDE DIAMETER AND IN THE BALL BORE SHALL BE PROTECTED FROM EXPOS
18、URE TO PLATING SOLUTIONS DURING PROCESSING.BALL: PASSIVATE BALL AS DETAIL PER AMS2700, METHOD 1 (NITRIC ACID) OR METHOD 2 (CITRIC ACID), OR ASTM A967. CITRIC 1, CITRIC 2, AND CITRIC 3 ARE ACCEPTABLE. BALL SURFACE FINISH SHALL BE AS ORIGINALLY QUALIFIED.4. HARDNESS: BALL 440C HRC 55-62 OR PH13-8 HRC
19、43 MIN; RACE: HRC 28 MIN, HRC 37 MAX BEFORE SWAGING.AEROSPACE STANDARDAS81820/1SHEET 3 OF 4REV.DBEARING, PLAIN, SELF-ALIGNING, SELF-LUBRICATING, LINED BORE, LOW SPEED, NARROW,GROOVED RACE, -65 TO +325 F5. NO-LOAD TORQUE: WHEN THE LETTER “K” IS PRESENT IN THE PART NUMBER, LOWER VALUES OF NO-LOAD TORQ
20、UE ARE SPECIFIED PER TABLE 1. IF THE MEASURED TORQUE OF A “K” TYPE BEARING IS LESS THAN .1 INCH-POUND, 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 OUTER RING. T
21、HIS STANDARD DOES NOT DEFINE REQUIREMENTS FOR TORQUE OR INTERNAL PLAY BETWEEN THE BEARING BORE AND SHAFT.TABLE 3 - INTERNAL CLEARANCEDASH NO. MAXIMUM RADIAL PLAY MAXIMUM AXIAL PLAY-4K THRU -12K .0007 INCH .0028 INCH-14K THRU -16K .0010 INCH .0040 INCH6. BREAK SHARP EDGES AND CORNERS AND REMOVE ALL B
22、URRS AND SLIVERS.7. DIMENSIONS ARE IN INCHES. UNLESS OTHERWISE SPECIFIED, TOLERANCES ARE: DECIMALS .010 AND ANGLES .5.NOTES:NOTICETHIS DOCUMENT REFERENCES A PART WHICH CONTAINS CADMIUM AS A PLATING MATERIAL. CONSULT LOCAL OFFICIALS IF YOU HAVE QUESTIONS CONCERNING CADMIUMS USE.1. WHEN TESTED TO THE
23、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 LI
24、FE MAY BE REQUIRED.3. DASH NUMBER DESIGNATES NOMINAL BORE DIA IN SIXTEENTHS OF AN INCH.4. DIMENSION “D” 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 D = .375 NOMINAL BORE DIA, PH13-8MO BALL MATERIAL, ZINC-NICKEL PLATED, LOW
25、 TORQUE, .010 INCHOVERSIZE O.D. (DIMENSION D).ABSENCE OF LETTER INDICATES PH13-8 BALL OPTIONLETTER “D” INDICATES 440C BALL OPTIONABSENCE OF THE LETTERS “ T “ AND “ U “ INDICATE STANDARD OUTER DIAMETER ( D), (SEE TABLE 1).T = .010 INCH OVERSIZE D (FOR REPAIR ONLY, SEE TABLE 2).U = .020 INCH OVERSIZE
26、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 LETTERS “ P “ AND “ E “ INDICATES NO PLATING.LETTER “ P “ INDICATES ZINC-NICKEL OR CADMIUM PLATING (SEE REQUIREMENT
27、3).LETTER “ E “ INDICATES ZINC-NICKEL PLATING ONLY (SEE REQUIREMENT 3).SIZE BORE DIAMETER (DASH NO. FROM TABLE 1).ABSENCE OF THE LETTER “ A “ INDICATES TESTED TO 25 000 CYCLESLETTER “ A “ INDICATES TESTED TO 100 000 CYCLESBASIC PART NUMBER.AEROSPACE STANDARDAS81820/1SHEET 4 OF 4REV.DBEARING, PLAIN,
28、SELF-ALIGNING, SELF-LUBRICATING, LINED BORE, LOW SPEED, NARROW,GROOVED RACE, -65 TO +325 F6. 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.7. REFERENCED GOVERNMENT (OR NON-GOVERNMENT) DOCUMENTS OF THE ISS
29、UE 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. A CHANGE BAR (l) LOCATED IN THE LEFT MARGIN IS FOR THE CONVENIENCE OF THE USER IN LOCATING AREAS WHERE TECHNI
30、CAL 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.
