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AS9120 & ISO9001 Approved

MPB bearing part number system

How to read miniature bearing numbers:

Example: S518MBH-5 DB2 P58 ZDM Q18 LOV2

S - Material stainless steel
518 - Bearing size (5/16 O.D. x 1/8 I.D.) The first digit is the O.D. size in sixteenths of an inch, the remaining digits give the bore size.
MB - Inner ring separable
H - Single shield
-5 - Bearing to meet ABEC-5P tolerances
DB2 - Duplexed back to back mounting under a 2 pound preload
P58 - Radial play of each bearing, before preloading of 0.0005 to 0.0008
ZDM - Grading of pairs having matched O.D. and bores
Q18 - Starting torque - 1800 rag-nun
LOV2 - Vacuum impregnate retainer with LO-2 lubrication

Special bearing configurations are indicated by an A, B, D, E as the case would be with a sequence number following. Numbers run from 1 to 999 then shift/to next letter in the alphabet.

Part number system

PrefixSuffixDefinition
..INCH, I.E: P35 DESIGNATES RADIAL PLAY OF -0.0003 TO 0.0005 INCHES
.0SHIELD OR SEAL ONV SIDE OPPOSITE FLANGE
.1ANTI-FRICTION BEARING MFG. ASSOCIATION CLASS 1
.3ANTI-FRICTION BEARING MFG. ASSOCIATION CLASS 3
.5ANTI-FRICTION BEARING MFG. ASSOCIATION CLASS 5P
.7ANTI-FRICTION BEARING MFG. ASSOCIATION CLASS 7P
.9ANTI-FRICTION BEARING MFG. ASSOCIATION CLASS 9P
.APIVOT BEARING, THROUGH SHAFT
.CRADIAL, L-TYPE RETAINER.
.DBBACK-TO-BACK MOUNTING
.DFFACE-TO-FACE MOUNTING
.DTTANDEM MOUNTING
.DUUNIVERSAL MOUNTING
.EEXTENDED INNER RING
.FFLANGED OUTER RING
.HSINGLE SHIELD
.HHDOUBLE SHIELD
.LDNO LUBRICATION. DRY
.LG-10ESSO STANDARD OIL ESSO RUST BAN 343 AN-C-124(3)
.LG-20ESSO STANDARD OIL CO. BEACON 325
.LG-31MPB MINAPURE
.LG-32LEHIGH CHEMICAL CO. ANDEROL L-793
.LG-38ESSO STANDARD OIL CO. ANDOCK B MIL-G-18709
.LG-39ESSO STANDARD OIL CO. ANDOCK C
.LG-40DOW CORNING DC-33 (SILICONE) (LIGHT)
.LGFFOLLOWED BY NUMBERS INDICATES SPECIFIC GREASE TO BE USED IN FILM GREASED BEARINGS .
.LGPFOLLOWED BY NUMBERS INDICATES THE SPECIFIC GREASE TO BE USED IN GREASE-PLATING SURFACES
.LO-1ANDERSON OIL CO. WINDSOR LUBE L-245X MIL-L-6085
.LO-11ESSO STANDARD OIL CO. ESSO AVIATION INST. OIL MIL-L-7870
.LO-12TEXACO, INC. LOW TEMPERATURE OIL MIL-L-7870
.LO-13SHELL OIL CO. AEROSHELL FLUID S3 (E) MIL-L-7870
.LO-14LEHIGH CHEMICAL CO. ANDEROL L-281 ORD-14-0-20
.LO-2LEHIGH CHEMICAL CO. ANDEROL L-401D MIL-L-6085
.LO-3SHELL OIL CO. AEROSHELL FLUID 12 (E+W) MIL-L-6085
.LO-30ECLIPSE-PIONEER P-LL
.LO-4ECLIPSE-PIONEER P-10 MIL-L-6085
.LO-6ESSO STANDARD OIL CO. UNIVIS P-38 MIL-L-6085
.LOGFOLLOWED BY NUMBERS INDICATES SPECIFIC OIL LUBRICANT TO BE USED, THEN CENTRIFUGED.
.LOVFOLLOWED BY NUMBERS INDICATES THE SPECIFIC LUBRICANT TO BE VACUUM IMPREGNATED INTO THE RETAINER. RETAINER MUST BE EITHER PAPER OR COTTON BASE PHENOLIC.
.LY-11SUPERMIL M-100 (SILICONE)
.LY-13DOW CORNING DC-44 (LIGHT) SILICONE, MIL-G-15719
.LY-15GENERAL ELECTRIC GE VERSILUBE G-300
.LY-167SUPERMIL A72832 (MIL-G-2 3827A)
.LY-17TEXACO, INC. TEXACO UNITEMP 500
.LY-185KG80
.LY-196AEROSHELL 7 (MIL-G-2 382 7A)
.LY-1S9KRYTOX 240 AC
.LY-21DOW CORNING DC-510 (50) FLUID
.LY-22DOW CORNING DC-200 (10) FLUID
.LY-231MOBIL 28 (MIL-G-81322A)
.LY-24ESSO STANDARD OIL TERESSO V-78
.LY-250NRL MB-20B
.LY-252SRG 160
.LY-254XRL 743A
.LY-28GENERAL ELECTRIC GE SILICONE OIL F44 (MIL-S-81087, TYPE II)
.LY-36DOW CORNING DC-33 (FLUID) SILICONE
.LY-37DOW CORNING DC-33 (MEDIUM) SILICONE
.LY-39DOW CORNING DC-200 (12,500 FLUID)
.LY-4ANDERSON OIL CO. WINDSOR LUBE LS-252 MIL-L-17353
.LY-4 81 PART GE VERSILUBE G-300 (LY-15) WITH 8 PARTS GE VERSILUBE F-50 (LY-5). APPLY WITH SYRINGE.
.LY-4 9LEHIGH CHEMICAL CO. ANDEROL L-451
.LY-40DOW CORNING DC-510 (500) FLUID
.LY-41LEHIGH CHEMICAL CO. ANDEROL L-423
.LY-5GENERAL ELECTRIC GE VERSILUBE F-50
.LY-5 3DOW CORNING DC-200 (60,000 CS)
.LY-51DOW CORNING DC-510 (1000 CS)
.LY-52DOW CORNING DC-510 (100,000 CS)
.LY-60DOW CORNING FS 1265 FLUID
.LY-7DOW CORNING DC-200 (20) FLUID
.MHIGH SPEED, NON-SEPARABLE (REINFORCED PHENOLIC SEPARATOR)
.MBHIGH SPEED, INNER RING SEPARABLE (REINFORCED PHENOLIC SEPARATOR)
.MCHIGH SPEED, CONRAD-TYPE
.MCDHIGH SPEED, CONRAD-TYPE MINAPAR RETAINER (PLASTIC)
.MCJSELF LUBRICATING, CONRAD TYPE
.MCKHIGH SPEED, CONRAD-' TYPE MINSPAR II RETAINER (PLASTIC)
.MRHIGH SPEED, FULL FACE
.NNARROWER THAN STANDARD
.PFOLLOWED BY TWO NUMBERS INDICATES RADIAL PLAY IN TEN THOUSANDTHS OF AN
.PRPIVOT BEARING, CLOSED END
.QFOLLOWED BY A NUMBER INDICATES PEAK STARTING TORQUE IN HUNDREDS OF MG-MM. (EXAMPLE: Q15 INDICATES BEARING WITH 1500 MG-MM PEAK STARTING TORQUE. )
.RRIBBON RETAINER
.STTEFLON SLUG SEPARATOR
.TTHRUST BEARING
.VFOLLOWED BY A NUMBER INDICATES PEAK RUNNING TORQUE IN HUNDREDS OF RAG-NUN. (EXAMPLE: V13 INDICATES A BEARING WITH PEAK RUNNING TORQUE OF 1300 MG-MM.)
.WWIDER THAN STANDARD
.ZSINGLE SEAL
.ZD-1-1BORE TOLERANCE +0.0000 - .0001 O.D. TOLERANCE +0.0000 - .0001
.ZD-1-2BORE TOLERANCE +0.0000 - .0001 O.D. TOLERANCE -0.0001 - .0002
.ZD-2-1BORE TOLERANCE -0.0001 - .0002 O.D. TOLERANCE +0.0000 - .0001
.ZD-2-2BORE TOLERANCE -0.0001 - .0002 O.D. TOLERANCE -0.0001 - .0002
.ZD-A-ABORE TOLERANCE +0.000000 - .000050 O.D. TOLERANCE +0.000000 - .000050
.ZD-A-BBORE TOLERANCE +0.000000 + .000050 O.D. TOLERANCE -0.000050 - .000100
.ZD-A-CBORE TOLERANCE +0.000000 - .000050 O.D. TOLERANCE -0.000100 - .000150
.ZD-A-DBORE TOLERANCE +0.000000 - .000050 O.D. TOLERANCE -0.000150 - .000200
.ZD-B-ABORE TOLERANCE -0.000050 - .000100 O.D. TOLERANCE +0.000000 - .000050
.ZD-B-BBORE TOLERANCE -0.000050 - .000100 O.D. TOLERANCE -0.000050 - .000100
.ZD-B-CBORE TOLERANCE -0.000050 - .000100 O.D. TOLERANCE -0.000100 - .000150
.ZD-B-DBORE TOLERANCE -0.000050 - .000100 O.D. TOLERANCE -0.000150 - .000200
.ZD-C-ABORE TOLERANCE -0.000100 - .000150 O.D. TOLERANCE +0.000000 - .000050
.ZD-C-BBORE TOLERANCE -0.000100 - .000150 O.D. TOLERANCE -0.000050 - .000100
.ZD-C-CBORE TOLERANCE -0.000100 - .000150 O.D. TOLERANCE -0.000100 - .000150
.ZD-C-DBORE TOLERANCE -0.000100 - .000150 O.D. TOLERANCE -0.000150 - .000200
.ZD-D-ABORE TOLERANCE -0.000150 - .000200 O.D. TOLERANCE +0.000000 - .000050
.ZD-D-BBORE TOLERANCE -0.000150 - .000200 O.D. TOLERANCE -0.000050 - .000100 .
.ZD-D-CBORE TOLERANCE -0.000150 - .000200 O.D. TOLERANCE -0.000100 - .000150
.ZD-D-DBORE TOLERANCE -0.000150 - .000200 O.D. TOLERANCE -0.000150 - .000200
.ZDMGRADED FOR PAIRS OF BEARINGS HAVING MATCHED O.D.'S AND BORES
.ZOGRADED O.D.'S ONLY
.ZZDOUBLE SEALED BEARING
N.BERYLLIUM COPPER MATERIAL (NON-MAGNETIC BEARINGS)
S.AISI 440C STAINLESS STEEL MATERIAL

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