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FORMAPPROVEDOMB NO. 0704-0188

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‘; -4 THRU-5

run .,-6 THRU-10

.1 , -12 THRU -16

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ION.005 NAx (SEE PROWRENENT

NAX SET-BACK-4 AND -5

( BOTH SIDES 8EFORE LINING) .025 A4AX SET-BACKFOR -6 THRU -16

DETAIL ATABLE 1. DIMENSIONS ANO STRENGTHS

BNO-LOAD

D H Q n STATIC LIMIT OSCIL- ROTATIONALLOAO LATING

OASH :;Jn& +.0000BREAKAUAY TORQUE WT

+. 000 - LOAONO.

IN - LB-.0005 +.005 MIN -.002 LB I&

RAOIAL AXIALLB LB STANDARO “K”*TYPE

-4 .2510 .6562 .250 10 .343 5550 430 2650 1.0- 5.0 0 -0.5 .020

-5 .3135 .7500 .2B1 10 .375 7700 700 3700 .030

-6 .3760 .8125 .312 9 .406 10200 1100 4900 .040

-7 .4385 .9062 .343 B .437 12950 1400 6700 .050

-B .5010 1.0000 .390 8 .500 17250 2100 8250 1.0- 15.0 0 - 1.0 .070

-9 .5635 1.0937 .437 8 .562 22150 3680 10600 .090

-10 .6260 1.1875 .Soo 8 .625 27700 4720 13250 .120

-12 .7510 1.4375 .593 8 .750 40600 6750 19400 .210

-14 .8760 1.5625 .703 8 .87s 55950 9350 26750 .2701.0 -25.0 0 -2.0

-16 1.0010 1.75D0 .797 9 1.DoQ 73800 12160 35250 .390

● SEE REQUIREMENT 5 “N&LOAD TORQUE” ANO NOTE 5

REQUIREMENTS:

1. NATERIAL: BALL: PH13-8 II!O STEEL ALLOY PER MIS 5629, CONOITION H1OOO.OUTER RING: 17-4 PH STEEL ALLOY PER AMS 5643.

LINER : POLYTETRAFLUOROETHY LENE (PTFE) SHALL BE INCLUOEO IN THE LINER.

2. SURFACE TEXTURE: BALL DIA. Ra 8; BALL FACES Ra 16; OUTER RACE DIA Ra 32; ALL OTHER METALLICSURFACES. Ra 125. LINER SURFACES ARE EXENPT FRM SURFACE TEXTURE MEASUREMENTS.

~REPARING ACTIVITY: NAVY — AS MILITARY SPECIFICATION SHEETSPECIFICATIONSHEET NUMBER 31 J/iN90

:USTOOIAN5 ARMY– AV NAW -TITLE MIL-B-81820/4

AIR FORCE- 99 OLA-BEARING; PLAIN, SELF-ALIGIIING1 SUPERSEDING

fEVIEW OIJ - Is SELF-LUBRICATING; LINED BORE;

JSEIt my - MI LOII SPEED; NARRON;

IROJECTNUMBER 31z0 - 0695 CHANFEREOOUTERRING; -65- TO 325” F AMSC – WA FSC 3120

NSTRIBUTION STATEMENT& APPROVEO FOR PUBLIC RELEASE DISTRIBUTION IS UNILIMITEO. PAGE I OF z

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FORMAPPROVEDOMB NO. 0704.0188

3. SURFACEFINISH:[-.

OUTER RACE: PLATING, IIHEN SPECIFIED, SHALL BE CADMIUM PLATING PER QQ-P-416, TYPE II t CLASS 2.

PLATC ON THE OUTSIOL DIAMETER SURFACE AND ON THE CHANFER.

PLATING RUNOUT SHALL OCCUR IN THE SIDE FACE AREA BETUEEN THL CHAMFER ANO THE BALL.

THE PTFE LINER IN THE OUTER RACE INSIDE DIAMETER AND IN THE BALL BORE SHALL BE PROTECTED FROMEXPOSURE TD PLATING SOLUTIONS DURING PROCESSING.

BALL : PASS I VATE PER MI L-S-5002.—

4. HARDNESS: BALL: RC 43 MIN; OUTER RING: RC 2B f41N, RC 37 MAX BEFDRESHAGING.

5. NO-LOAD TORQUE: WHEN THF LITTER “K” IS PRESENT IN THE PART NUMBER LOHER VALUES OF NO-LOAD TORQUE ARESPECIFIEO PER TABLE 1. :F THE MEASUREO TORQUE OF A “K” TYPE BEARING IS LESS THAN 0.1 INCH-PDUND. THEINTERNAL RADIAL CLEARANCE SHALL BE MEASUREO AND SHALL NOT EXCEED THE VALUES IN TABLE 11. THESEREQUIREMENTS APPLY TO THE TORQUE ANO INTERNAL PLAY BETIAEEN THE SPHERICAL BALL AND THE OUTER RING. THISSTANDARD DDES NOT DEFINE REQUIREMENTS FOR TDRQUE OR INTERNAL PLAY BETMEEN THE BEARING AND SHAFT.

TABLE II. INTERNAL CLEARANCE

OASH NO. NAXIMUM RADIAL PLAY NAXIMUM AXIAL PLAY

-4K THRU -12K 0.0007 INCH 0.0028 INCH-14K THRU ’16K 0.0010 INCH 0.0040 INCH

6. BREAK SHARP EDGES ANO CORNERS ANO RENOVE ALL BURRS ANO SLIVERS.

1. DIMENSIONS ARE IN INCHES. UNLESS OTHERMISE SPECIFIEO, TOLERANCES, DECIMALS ~ .010, ANGLES ~ 0.5.

NOTES:

1. 14HEN TESTEO TD THE FIJJIO CONTAMINATION AND SUB-ZERO TEMPERATURf REQUIREMENTS OF THE PROCUREMENTSPECIFICATION, THE OSCILLATING LOAD SHALL BE DECREASEO TO 75% OF SPECIFIEO LOAD.

2. WHEN FLUIDS ANO ELEVATED TEMPERATURES (ABOVE 200” F) ARE BOTH PRESENT IN AN APPLICATION, THEN REDUCTIONS INOPERATING LOADS OR BEARING LIFE MAY BE REQUIRED.

3. OASH NUMBER DESIGNATES NOMINAL BORE IN SIXTEENTHS OF AN INCH.

4. OIMENSION “O” TO BE MET AFTER PLATING.

5. EXANPLE OF PART NO.

~K

M81820 4-6P K = 3/8 NOMINAL BORE OIA, PH13-B MO BALL MATERIAL, CAOMIUM PLATEO, LOH TORQUE.

i

ABSENCE OF LETTER INDICATES STANDARD BREAKAUAY TORQUE.

LETTER ‘K” INDICATES LOH BREAKAMAY TORQUE (SEE TABLE I ) .

ABSENCE OF LETTER INDICATES NO PLATING.

LETTER “P” INOICATES CADMIUM PLATING (SEE REQUIREMENT 3).

SIZE - BORE OIAMETER. (OASH NO. FROM TABLE I).

MS NUMBER.

6. IN THE EVENT OF A CONFLICT BETHEEN THE TEXT OF THIS STANDARD ANO THE REFERENCES CITED HEREIN, THE TEXT OFTHIS STANOARD SHALL TAKE PRECEDENCE.

7. REFERENCED GOVERNMENT (OR NON-GOVERNMENT) DOCUMENTS OF THE ISSUE LISTED IN THAT ISSUE OF THE OE’PARTMENT OFOEFENSE INOEX OF SPECIFICATIONS AND STANDARDS (DoOISS) SPECIFIED IN THE SOLICITATION FORN A PART OF THISSTANOARO TO THE EXTENT SPECIFIEo HEREIN..

IREPARINfiXTIVITY:MAW —AS MILITARY SPECIFICATION SHEET -n-- ‘Hm ‘UN- 3’ ‘AN 90:USTODIAN~ ARMY - AV NAVY -

TITLEMIL-B-81820/4

AIRFORCS- 99 DIA- BEARING, PLAIN, SELF-ALIGNING,SELF-LUBRICATING, LINED BORE, 81JPER8EMM

fEVISW OLA- I S LOW SPEEO, NARROW,M3t ARMY-MI CHAMFEREO OUTER RING, -65-F TO 325*FNO.JECTNUMBER3120-0695

AMSC- N/A FSC 3120

MTI?IBUTION STATEMENThAPmOvED FORPUBLIC~ 01STR3B4JTtDNIS UNUNATED. PMSZOF2—

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