| Prefix |
Suffix |
Definition |
| . |
=C2836LY-96 |
FS-1290, DOW CORNING CO. |
| . |
A |
SEMI-STANDARD-LARGER WIDTH AND O.D. BEARING |
| . |
A-- |
LARGER THAN STANDARD O.D. |
| . |
A--- |
LARGER O.D. THAN STANDARD AND SPECIAL WIDTH |
| . |
A1 |
ABEC 1 |
| . |
A3 |
ABEC 3 |
| . |
A5 |
AVEC 5P |
| . |
A7 |
ABEC 7P |
| . |
A9 |
ABEC 9P |
| . |
B |
BLISTER PACK |
| . |
BB |
SPECIAL BORE TOLERANCES |
| . |
BC |
FOLLOWING LUBRICANT CODE INDICATES BARRIER COATING |
| . |
BR |
RIBBON, BERYLLIUM COPPER |
| . |
C |
COIN WRAP |
| . |
C04 |
O.D. CODING ONLY 0.000050 INCREMENTS |
| . |
C40 |
I.D. CODING ONLY 0.000050 INCREMENTS |
| . |
C44 |
I.D. AND O.D. CALIBRATION IN 0.000050 INCREMENTS |
| . |
COX |
O.D. CODING ONLY 0.0001 INCREMENTS |
| . |
CR |
RIBBON, PTFE COATED |
| . |
CV |
SPECIAL RACE CURVATURE |
| . |
CXO |
I.D. CODING ONLY 0.0001 INCREMENTS |
| . |
CXX |
I.D. AND O.D. CALIBRATION IN 0.001 INCREMENTS |
| . |
D |
SINGLE RUBBER SEAL |
| . |
DB |
BACK-TO-BACK CONFIGURATION |
| . |
DD |
DOUBLE RUBBER SEAL |
| . |
DF |
FACE-TO-FACE CONFIGURATION |
| . |
DT |
TANDEM CONFIGURATION |
| . |
DU |
UNIVERSAL DUPLEX NUMBERS FOLLOWING LETTER CODE INDICATE MEAN PRELOAD IN POUNDS. IF NOT FOLLOWED BY A NUMBER STANDARD PRELOAD IS APPLIED |
| . |
DZ |
RUBBER SEAL AND SHIELD |
| . |
E |
EXTENDED INNER RING ONE SIDE |
| . |
EE |
EXTENDED INNER RING BOTH SIDES |
| . |
F |
FULL BALL COMPLEMENT |
| . |
G |
SPECIAL EXTERNAL GROOVE IN BEARING. |
| . |
H |
CROWN, LAND PILOTED |
| . |
HD |
CROWN, BALL PILOTED |
| . |
J |
ACETAL, CROWN TYPE |
| . |
JM |
ACETAL, FULL TYPE |
| . |
K |
KRAFT FOIL PACKAGE |
| . |
KB |
CROWN PHENOLIC, PAPER BASE |
| . |
KC |
CROWN PHENOLIC, LINEN BASE |
| . |
KM |
FULL PHENOLIC, LINEN BASE |
| . |
KN |
FULL PHENOLIC, PAPER BASE |
| . |
L |
SINGLE GLASS REINFORCED PTFE SEAL |
| . |
LB-11 |
1/85 = LO-1/FREON (BY VOLUME) |
| . |
LD |
DRY - NO LUBRICATION |
| . |
LG |
GREASES QUALIFIED TO MIL-SPECS. |
| . |
LG-2 |
AEROSHELL GREASE 6, SHELL OIL CO. MIL-G-7711A |
| . |
LG-20 |
BEACON 325, HUMBLE OIL AND REFINING CO. |
| . |
LG-31 |
MPB MINAPURE MIL-G-15793 |
| . |
LG-32 |
ANDEROL L-793A, TENNECO CHEMICALS INC. |
| . |
LG-35 |
AEROSHELL GREASE 5, SHELL OIL CO. MIL-G-3545B |
| . |
LG-36 |
TEXACO 1999 HIGH TEMP, GREASE, TEXAS OIL MIL-G-3545B |
| . |
LG-37 |
TEMPLUBE 124 MIL-G-4343A |
| . |
LG-38 |
ANDOK B, HUNELE OIL AND REFINING CO. MIL-G-18709A |
| . |
LG-39 |
ANDOK C, HUMBLE OIL AND REFINING CO. |
| . |
LG-43 |
SUPERMIL ASU-06752, AMERICAN OIL CO. MIL-G-24760A |
| . |
LG-49 |
AEROSKELL GREASE 7, SHELL OIL CO. MIL-G-23827A |
| . |
LG-52 |
CHEVRON O.H.T. GREASE STANDARD OIL OF CALIF. MIL-G-18709A |
| . |
LG-54 |
2346 LOW TEMP, GREASE EP , TEXAS OIL CO. MIL-G-23827A |
| . |
LG-55 |
ESSO 5114 EP GREASE, HUMBLE OIL MIL-G-23827A |
| . |
LG-56 |
BRAYCOTE 627, BRAY OIL CO. MIL-G-23827A |
| . |
LG-57 |
SUPERMIL GREASE A72832, AMERICAN OIL MIL-G-23827A |
| . |
LG-58 |
MOBIL NO. 27, MOBIL OIL CO. |
| . |
LG-61 |
KEYSTONE NO. 89 MEDIUM, KEYSTONE LUB . CO. MIL-L-15719A |
| . |
LG-67 |
ROYCO 21, ROYAL LUBRICANTS CO. MIL-G-7421B |
| . |
LG-71 |
ANDOK 260, HUMBLE OIL AND REFINING CO. . MIL-G-3545B |
| . |
LG-73 |
SHELL GREASE ETR-B |
| . |
LG-74 |
SHELL GREASE ETR-D |
| . |
LG-76 |
CHEVRON GREASE BRB-2 MIL-G-3545B |
| . |
LG-80 |
AEROSHELL GREASE 14 MIL-G-25537A |
| . |
LG-81 |
LUBRIPLATE 907 |
| . |
LG-85 |
G. E. VERSIBLUE 341 H |
| . |
LI'- 9 2 |
MOBIL VELOSITE NO. 3, MOBIL OIL CO. |
| . |
LL |
DOUBLE GLASS REINFORCED PTFE SEAL |
| . |
LM |
MIXTURE OF OIL AND GREASE |
| . |
LM-41 |
2/L=L06 (UNIVIS P38) /LG-20 (BEACON 325) |
| . |
LM-42 |
1/1=L06/LG20 BY VOLUME |
| . |
LM-43 |
1/2-L06/LG20 BY VOLUME |
| . |
LM-46 |
2/L=L06/LY72 |
| . |
LM-51 |
1/8=G-300/F-50 (10GRM/80CC) |
| . |
LM-52 |
2/1 G-300/F-50 BY VOLUME |
| . |
LM-53 |
1/1=G-300/F-50 BY VOLUME |
| . |
LM-54 |
1/3=G-300/F-50 BY VOLUME |
| . |
LM-61 |
L/8=G-300/F-44 (10GRM/80CC) (USE LM-51) |
| . |
LM-77 |
L/2=DC-44/DC-200 BY VOLUME |
| . |
LM-81 |
10GRM/80CC-DC-33LIGHT/DC-200 (2 DCS) |
| . |
LM-82 |
5/95-GRAPHITE/AN'DOK B BY VOLUME |
| . |
LM-83 |
97/3-DC.200 (20J/ORTHOLEUM 162 (DUPONT) |
| . |
LM-84 |
3/7=DC-200 (350 CST.)/DC-33F BY VOLUME |
| . |
LM-85 |
3/7=DC-200 (20)/DC-33L BY VOLUME |
| . |
LM-91 |
1/8=M-100(LY-11) /F-50U -5) BY VOLUME |
| . |
LM-99 |
1/1/6 PERCENT=DC-60/DC-61/AEROGIL |
| . |
LO |
SINGLE SEAL ON SIDE OPPOSITE FLANGE |
| . |
LO |
OILS QUALIFIED TO MIL-SPECS |
| . |
LO-1 |
WINSOR LUBE L-245X, ANDERSON OIL MIL-L-6085A |
| . |
LO-11 |
ESSO AVIATION INSTRUMENT OIL, HUMBLE OIL MIL-L-7870A |
| . |
LO-12 |
TEXACO 1692 LOW TEMP, OIL, TEXAS OIL CO. MIL-L-7870A |
| . |
LO-13 |
AEROSHELL FLUID 3, SHELL OIL CO. MIL-L-7870A |
| . |
LO-15 |
GULFITE OIL 6, GULF OIL CO. MIL-L-7870A |
| . |
LO-2 |
ANDEROL L-401D TENNECO CHEMICALS, INC. MIL-L-6085A |
| . |
LO-21 |
AEROSHELL FLUID 4, SHELL OIL CO. MIL-H-5605A |
| . |
LO-25 |
WINSOR LUBE LS-252 ANDERSON OIL CO. MIL-L-17353 |
| . |
LO-3 |
AEROSHELL FLUID 12, SHELL OIL CO. MIL-L-6085A |
| . |
LO-31 |
BRAYCOTE 855, BRAY OIL CO MIL-L-14107B |
| . |
LO-4 |
PIONEER P-10, BENDIX ECLIPSE PIONEED MIL-L-6085A |
| . |
LO-51 |
AEROSHELL AIRCRAFT TURBINE OIL 304 MIL-L-7807G |
| . |
LO-6 |
UNIVIS P-38, HUMBLE OIL AND REFINING CO. MIL-L-6085A |
| . |
LO-61 |
TURBO OIL 10 HUMBLE OIL CO. (GRADE 1010) MIL-0-6081 |
| . |
LY |
OTHER OILS AND GREASES |
| . |
LY-1 |
SF-96(40CS), GENERAL ELECTRIC CO. |
| . |
LY-1 5 |
VERSILUBE G-300, GENERAL ELECTRIC CO. |
| . |
LY-1 6 |
VERSILUBE G-305M, GENERAL ELECTRIC CO. |
| . |
LY-1 8 |
ALVANIA RS GREASE, SHELL OIL CO. |
| . |
LY-10 |
SUPERMIL ASU M-40, AMERICAN OIL CO. |
| . |
LY-100 |
DC-200(50CS) , DON CORNING CO. |
| . |
LY-101 |
DRYTOX 24QAC, E.I. DUPONT CO. |
| . |
LY-102 |
SUN 742 EP GREASE, SUN OILCO . |
| . |
LY-103 |
PETROFINA 82590 (GREASE) |
| . |
LY-103 |
ANDEROL L-795, TENNECO CHEMICALS INC. |
| . |
LY-104 |
AVJET JP-4 FUEL, TEXAS OIL CO. |
| . |
LY-105 |
ISOFLEXPDP65, KLUBER LUB (WEST GERMANY) |
| . |
LY-106 |
MOLYKYROM MO-4 , ROCOOL ADVANCED LUBRICANT |
| . |
LY-107 |
KRYTOX 240AB, E.I. DUPONT CO. |
| . |
LY-109 |
ESSO NUTO H44, HUMBLE OIL |
| . |
LY-11 |
SUPERMIL ASU M-100, AMERICAN OIL CO. |
| . |
LY-110 |
BEHDIXSOLUTION AK1080 |
| . |
LY-112 |
ISOFLEXSUPER LDS18, KLUBER LUB. |
| . |
LY-113 |
CALYPSOL K729GF |
| . |
LY-114 |
MOBIL VELOCITY GRADE S, MOBIL OIL |
| . |
LY-115 |
KRYTOX 143AC |
| . |
LY-116 |
KRYTOX 240AZ E. I. DUPONT |
| . |
LY-117 |
KRYTOX 143AZ, E. I. DUPONT |
| . |
LY-118 |
SUNAPLEXEP 872 GREASE, SUN OIL CO. |
| . |
LY-12 |
DC-44 FLUID, DOW CORNING CO. |
| . |
LY-13 |
DC-44 (MEDIUM) , DOW CORNING CO. MIL-G-15719A |
| . |
LY-14 |
DC-41, DOW CORNING CO. |
| . |
LY-17 |
TEXACO UNITEMP 500, TEXAS OIL CO. |
| . |
LY-19 |
DC-510 (100CS) , DOW CORNING CO. |
| . |
LY-2 |
SF-96-(1000 CS), GENERAL ELECTRIC CO. |
| . |
LY-2 3 |
DC-200 (750CS) , DOW CORNING CO. |
| . |
LY-2 5 |
DC-550 FLUID, DOW CORNING CO. |
| . |
LY-2 7 |
TERESSTIC N-75, HUMBLE OIL AND REFINING CO. |
| . |
LY-2 8 |
DC-510 (2500CS) , DOW CORNING CO. |
| . |
LY-20 |
DC-330, DOW CORNING CO. |
| . |
LY-201 |
BRAYCO 248, BRAY OIL CO. MIL-G-11796B |
| . |
LY-202 |
BRAY 855 MIL-L-14107B |
| . |
LY-21 |
DC-510 (50CS) , DOW CORNING CO. |
| . |
LY-22 |
DC-200 (IOCS) , DOW CORNING CO. |
| . |
LY-24 |
TERESSTIC V:79, HUMBLE OIL REFINING CO. (REPLACED BY TERESSTIC N75) |
| . |
LY-26 |
DC-710R(500CS) , DOW CORNING CO. |
| . |
LY-3 |
GE L-623, GENERAL ELECTRIC CO. |
| . |
LY-3 7 |
YDC-33, MEDIUM, DOW CORNING CO. |
| . |
LY-30 |
DC-560 FLUID, DOW CONRING CO. |
| . |
LY-31 |
LUBRIPLATE 910 (GREASE) |
| . |
LY-33 |
ANDEROL L-757-TENNECO CHEMICALS, INC. |
| . |
LY-34 |
AEROSHELL GREASE 17, SHELL OIL CO. MIL-G-21164B |
| . |
LY-36 |
DC-33 FLUID, DOW CORNING CO. |
| . |
LY-38 |
'DC-200 (100,OOOCS) , DOW CORKING CO. |
| . |
LY-39 |
DC-200 (12500CS) , DOW CORNING CO. |
| . |
LY-40 |
DC-510 (500CS) , DOW CORNING CO. |
| . |
LY-41 |
ANDEROL L-423, TENNECO CHEMICALS, INC. |
| . |
LY-42 |
DC-200 (200CS) , DOW CORNING CO. |
| . |
LY-43 |
DC-200 (1000CS) , DOW CORNING CO. |
| . |
LY-44 |
APL GREASE, SHELL OIL CO. |
| . |
LY-45 |
SHELL ALVANIA RA GREASE, SHELL OIL CO. |
| . |
LY-46 |
NPT-4 BRAYCO, BRAY OIL CO. |
| . |
LY-47 |
DC F-60 FLUID, DOW CORNING CO. |
| . |
LY-48 |
MOBIL GREASE NO. 28, MOBIL OIL CO. MIL-G-81322 |
| . |
LY-49 |
CHEVRON AVIATION GREASE NO. 2 (RPM GREASE) |
| . |
LY-5 |
VERSILUBE F-50, GENERAL ELECTRIC CO. |
| . |
LY-51 |
ISOFLEX NBU-15, KLUBER LUB (W/GERMANY) |
| . |
LY-52 |
DC-55 MEDIUM, DOW CORNING CO. MIL-G-4343B |
| . |
LY-53 |
MOLYDOTE TYPE U, MOLYKOTE LTD. |
| . |
LY-54 |
WINDSOR LUBE LS-172, ANDERSON OIL CO. |
| . |
LY-55 |
ANDEROL L-456, TENNECO CHEMICALS, INC. (OIL) |
| . |
LY-56 |
LT-10, ORE LUBE CORP. |
| . |
LY-57 |
DC-200 (200,000 CS), DOW CORNING CO. |
| . |
LY-58 |
VERSILUBE F-44, GENERAL ELECTRIC CO. (NO LONGER MGF. USE F-50) |
| . |
LY-59 |
FS-1292, DOW CORNING CO. |
| . |
LY-6 |
MOLYLOTE BR2-S, DOW CORNING CO. |
| . |
LY-60 |
CARNATION WHITE MINERAL OIL, WITCO CHEM . |
| . |
LY-61 |
KENDALL KG-80, KENDALL REFINING CO. |
| . |
LY-62 |
ANDEROL L-762, TENNECO CHEMICALS INC. |
| . |
LY-63 |
SF-96(50CS), GENERAL ELECTRIC CO. |
| . |
LY-64 |
ANDEROL L-788, TENNECO CHEMICALS INC. |
| . |
LY-66 |
DC-510 (1000CS) , DON CORNING CO. |
| . |
LY-67 |
RAUNA40, NIPPON SEKYU CO. JAPAN MADE |
| . |
LY-68 |
BRB NO. 1, MOBIL OIL CO. |
| . |
LY-69 |
ERB LIFE TIME, MOBIL OIL CO. FS-1291, DOW CORNING CO. (NO LONGER MANUFACTURED) |
| . |
LY-7 |
DC-200 (20CS) , DOW CORNING CO. |
| . |
LY-71 |
SUPERMIL ASU GREASE 31052, AMERICAN OIL MIL-G-25013D |
| . |
LY-72 |
MALTEMP PS HO. 2 KYODOH YUSHI JAPAN MADE |
| . |
LY-73 |
MALTEMP PS NO. 3 KYODOH YUSHI JAPAN MADE |
| . |
LY-74 |
RAUNA 100, NIPPON SIKYU CO JAPAN MADE |
| . |
LY-75 |
SUPER BONE OIL |
| . |
LY-76 |
SQUALOLL-2 |
| . |
LY-77 |
TELLUS 41, SHELL OIL CO. |
| . |
LY-78 |
SILCODYNE H, IMPERIAL CHEMICAL INDUSTRIES |
| . |
LY-79 |
FS-1265 (1000CS) , DOW CORNING CO. |
| . |
LY-8 |
DC FS-3451 NO. 2 DOW CORNING CO. |
| . |
LY-80 |
DC-44 LIGHT, DOW CORNING CO. |
| . |
LY-81 |
DC-33 LIGHT, DOW CORNING CO. |
| . |
LY-82 |
SF-96(20CS), GENERAL ELECTRIC CO. |
| . |
LY-83 |
ALVANIA NO. 2, SHELL OIL CO. |
| . |
LY-84 |
ALVANIA NO. 3, SHELL OIL CO. |
| . |
LY-85 . |
FS-1265 (300CS) , DOW CORNING CO. |
| . |
LY-86 |
AEROSHELL GREASE 16, SHELL OIL CO. MIL-G-25760A |
| . |
LY-87 |
ALVAIJIA NO. 1, SHELL OIL CO. |
| . |
LY-88 |
ANDEROL L-761, TENNECO CHEMICALS INC. |
| . |
LY-89 |
DRYLUB LOX TYPE 822 |
| . |
LY-9 |
FS-3452, DOW CORNING CO. |
| . |
LY-90 |
SQUAIOL L-L |
| . |
LY-91 |
SF-8K50CS), GENERAL ELECTRIC CO. |
| . |
LY-93 |
BRAYCO MICRONIC NPT-3, BRAY OIL CO. |
| . |
LY-94 |
TELLUS 15, SHELL OIL CO. |
| . |
LY-95 |
ISOFLEXPDP38, KLUBEER LUB (WEST GERIR^NY) |
| . |
LY-97 |
DC-510 (16000CS) , DOW CORNING CO. |
| . |
LY-98 |
MOLYSIL33 (MX 3 3) , ROCOL ADVANCED LUBRIC / |
| . |
LY-99 |
D'C-331, DOW CORNING CO. . .... |
| . |
LY-G5 |
DC-550R, DON CORDING CO. |
| . |
LZ |
GLASS REINFORCED PTFE SEAL AND SHIELD WITH SEAL ON FLANGE SIDE |
| . |
N-- |
LARGER OR SMALLER BORE THAN STANDARD |
| . |
P |
CROWN, COPPER BRONZE |
| . |
P |
FOLLOWED BY TWO - FOUR NUMBERS INDI-_ . CATE THE RADIAL PLAY LIMITS IN TEN-THOUSANDTHS OF AN INCH. EXAMPLE: P25 INDICATES RADIAL PLAY OF 0.0002 INCH TO 0.0005 INCH P25 IS THE NMB STANDARD RADIAL PLAY. |
| . |
P |
PILL PACK |
| . |
PB |
CROWN BERYLLIUM COPPER |
| . |
R |
RIBBON LAND PILOTED |
| . |
RD |
RIBBON, BALL PILOTED |
| . |
RT |
FOLLOWED BY A NUMBER INDICATES MAXIMUM RUNNING TORQUE IN HUNDREDS OF MG. MM. EXAMPLE RT 15 INDICATES A MAXIMUM RUNNING TORQUE OF 1500 MG. MM. |
| . |
S1 |
DWELL LEVEL 1; NOISE COUNT 0 |
| . |
S2 |
DWELL LEVEL 2; NOISE COUNT 0 |
| . |
S3 |
DWELL LEVEL 3; NOISE COUNT 0 |
| . |
S4 |
DWELL LEVEL 4; UOISE COUNT 0 |
| . |
SD |
SPECIAL DESIGN BEARING |
| . |
SD |
SPRING |
| . |
SL |
SLUG |
| . |
T |
CROWN GLASS REINFORCED PTFE |
| . |
T |
FOLLOWED BY A NUMBER INDICATES MAXIMUM STARTING TORQUE IN HUNDREDS OF MG. MM. EXAMPLE: T 15 INDICATES A MAXIMUM STARTING TORQUE OF 1500 MG. MM. |
| . |
U |
UNIT PACK |
| . |
V |
RECESSED INNER RING ONE SIDE |
| . |
VN |
VIAL WITH NYLON BALLS SEPARATING BEARINGS. |
| . |
W |
RECESSED INNER RING BOTH SIDE |
| . |
W-- |
WIDER THAN STANDARD WIDTH |
| . |
Y-- |
NARROWER THAN STANDARD WIDTH |
| . |
Z |
SINGLE METALLIC SHIELD - REMOVABLE |
| . |
ZL |
SHIELD AND GLASS REINFORCED PTFE SEAL WITH SHIELD ON FLANGE SIDE |
| . |
ZO |
SINGLE SHIELD ON SIDE OPPOSITE FLANGE |
| . |
ZZ |
DOUBLE METALLIC SHIELD - REMOVABLE |
| FR |
. |
DUPLEX WITH ONE FLANGED AND ONE UNFLANGED BEARING |
| HBL |
. |
INNER RING RELIEVED AND SEPARABLE |
| L |
. |
RADIAL |
| LF |
. |
FLANGED RADIAL |
| LFW |
. |
FLANGED WITH NON-STANDARD FLANGE WIDTH |
| MBF |
. |
INNER RING RELIEVED AND SEPARABLE OUTER RING FLANGED AND O.D. TAPERED |
| MBR |
. |
INNER RING RELIEVED AND SEPARABLE |
| MBRI |
. |
INNER RING RELIEVED AND SEPARABLE |
| MDF |
. |
INNER RING RELIEVED AND NON-SEPARABLE, OUTER RING FLANGED AND O.D. TAPERED |
| MDL |
. |
INNER RING RELIEVED AND SEPARABLE - FLANGED OUTER RING |
| MDLF |
. |
INNER RING RELIEVED AND NON-SEPARABLE-FLANGED OUTER RING |
| MDR |
. |
INNER RING RELIEVED AND SEPARABLE - FLANGED OUTER RING |
| MDRF |
. |
INNER RING RELIEVED AND NON-SEPARABLE-FLANGED OUTER RING |
| MDRI |
. |
INNER RING RELIEVED AND SEPARABLE - FLANGED OUTER RING |
| MDRIF |
. |
INNER RING RELIEVED AND NON-SEPARABLE-FLANGED OUTER RING |
| MEL |
. |
OUTER RING RELIEVED AND NON-SEPARABLE |
| MELF |
. |
OUTER RING RELIEVED FLANGED AND NON-SEPARABLE |
| MER |
. |
OUTER RING RELIEVED AND NON-SEPARABLE |
| MERF |
. |
OUTER RING RELIEVED FLANGED AND NON-SEPARABLE |
| MERI |
. |
OUTER RING RELIEVED AND NON-SEPARABLE |
| MERIF |
. |
OUTER RING RELIEVED FLANGED AND NON-SEPARABLE |
| NM |
. |
BERYLLIUM COPPER |
| R |
. |
RADIAL |
| R |
. |
FLANGED TAPERED O.D. |
| RF |
. |
FLANGED RADIAL |
| RFW |
. |
FLANGED WITH NON-STANDARD FLANGE WIDTH |
| RI |
. |
RADIAL |
| RIF |
. |
FLANGED RADIAL |
| RIFW |
. |
FLANGED WITH NON-STANDARD FLANGE WIDTH |
| SM |
. |
AISI 440C RINGS WITH BERYLLIUM COPPER BALLS |
| SS |
. |
AISI 440C STAINLESS STEEL |
Bearing >Bearing Numbers > NMB bearings