NSK bearing part number system | nomenclature | prefixes | suffixes

Nsk bearing part number system

NSK Bearing Part Number System

Order codes for bearings are made up of a combination of letters and numbers. This alphanumeric combination denotes the type, size and structure of the bearing.

Within each order code, a distinction is made between the basic designation and any suffixes and prefixes.
The basic designation indicates the bearing type and the bore size.
These basic designations are defined in the German DIN 623 standard and the relevant ISO standard. For most bearing types, the basic designation is made up of numbers, but some are alphanumeric. Prefixes and suffixes denote special modifications, for example, if the internal clearance or accuracy deviate from the norm. The use of prefixes and suffixes is only partially standardised. Suffixes differ the most, with the various bearing manufacturers using different codes for certain modifications. This brochure explains the various bearing codes used by NSK and RHP and helps you compare them with other manufacturers’ designations.

Nsk bearing part number system
NSK bearing part number system | nomenclature | prefixes | suffixes -TFL

NSK is one of the world’s largest bearing manufacturers. In the early 1990s, it took over the RHP Group, the UK‘s biggest bearings producer. Since then, NSK has been distributing bearings using the NSK and RHP brand names. In some cases, the two brands’ bearings use different supplementary designations. If no supplementary designation is listed under the NSK or RHP brand name, it means that there is no equivalent to the other brand’s designation.

NSK How the Order Codes for Bearings Are Made Up

The diagram below shows how the order codes are made up. There should be spaces separating the individual sections of an order code from one another.

The order codes
NSK bearing part number system | nomenclature | prefixes | suffixes -TFL

Examples:

77206M1AC4ES41

77 – Two shields
206 – Basic number
M – Medium fit AFBMA class 0.
1 – ABEC-1 tolerance
AC4 – Andok C, 1/2 full
ES41 – Stabilized heat treatment

6206 DDUYL3BT3ES17

6206 – Basic number. DDU – Two rubber contact seals
Y – A pressed brass retainer
L – Loose fit, AFBMA Class 3
3 – ABEC-3 tolerance
BT3 – Beacon 325, 3/8 full
ES17 – Special cleaning

Designation of tapered roller bearings as per ISO 355

Designation of tapered roller bearings as per iso 355
NSK bearing part number system | nomenclature | prefixes | suffixes -TFL

Basic Designation of NSK Bearing

The basic model of NSK bearing consists of bearing series code and bearing hole code. Commonly used metric bearing series, the most important code.

Metric bearing seriesBasic designation
Deep-groove ball bearing42, 43, 60, 62, 63, 64, 68, 69, 160, 161
Angular contact ball bearing32, 33, 52, 53, 70, 72, 73, 78, 79
Self-aligning ball bearing12, 13, 22, 23, 112, 113, 115
Separable ball bearingBO, E, L
Cylindrical roller bearingN2, N3, N4, N22, N23
NJ2NJ3, NJ4, NJ22, NJ23
NU2NU3, NU4, NU22, NU23
NUP2NUP3, NUP4, NUP22, NUP23
NF2NF3, NF4
NNNN30, NNU49
Tapered roller bearing302, 303, 313, 320, 322, 323, 329, 330, 331, 332
Spherical roller bearing213, 222, 223, 230, 231, 232, 239, 240, 241
Thrust ball bearing511, 512, 513, 514, 522, 523, 524
The spherical roller thrust bearing292, 293, 294

RHP still produces deep-groove ball bearings, separable ball bearings, angular contact ball bearings, four-point contact bearings, thrust ball bearings, cylindrical roller bearings and self-aligning bearings in imperial dimensions (inches). Please refer to our catalogue for these bearing series’ codes.

Code for the Bearing Bore

The code for the bearing bore indicates the bearing’s bore size. A two-digit number is used for bore sizes from 20 mm to 480 mm. This number is multiplied by five to give the bore size. For example, code 6224 stands for a deep-groove ball bearing with a bore size of 120 mm. Diameters of 10, 12, 15 and 17 mm is an exception. In these cases, 00 indicates a diameter of 10 mm, 01 stands for 12 mm, 02 means 15 mm, and the code 03 corresponds to a diameter of 17 mm.

Code for the Bearing BoreThe diameter is stated in mm for bore sizes up to 9 mm and over 480 mm. However, a deep-groove ball bearing with the code 688 MC3 has a bore size of 8 mm and a spherical roller bearing designated as 230/560 CAM E4 has a bore size of 560 mm. The bore size is separated from the bearing series code using a slash in the case of bearings with bore sizes that cannot be divided by five, e.g. 63/22.

Letters and Their Different Meanings

Prefixes and suffixes can have different meanings depending on the bearing series in question.

Examples:

HR 33206 J Contact angle as per ISO
6204 ZZ C3E AS2S 5 J Individually wrapped and boxed
6304 C3 E Low noise bearing
NJ 204 E T Extra capacity cylindrical roller bearing
R NU 207 Cylindrical roller bearing with no inner ring
R 4 ZZ Miniature bearing with imperial dimensions

NSK Bearing Prefixes | Suffixes

The use of prefixes is relatively small. They are almost exclusively used to indicate individual components of complete bearings or designated miniature bearings. A large number of suffixes are used to indicate structural modifications. Specifically, the suffix provides information about:

NSK PrefixNSK SuffixDefinition
.+AHWITHDRAWAL OR REMOVAL SLEEVE.
.+HADAPTER SLEEVE.
.+HJSTABILIZING RING/ CYLINDRICAL ROLLER BEARINGS.
.+KOUTER RING SPACER, TAPERED ROLLER BEARINGS.
.+KLINNER AND OUTER RING SPACER, TAPERED ROLLER BEARINGS.
.+LINNER RING SPACER, TAPERED ROLLER BEARINGS.
.-008BORE SIZE, 1/2 INCH DIAMETER.
.-010BORE SIZE, 5/8 INCH DIAMETER.
.-100BORE SIZE, 1 INCH DIAMETER.
.-107BORE SIZE, 1-7/16 INCH DIAMETER.
.-12BORE SIZE, 3/4 INCH DIAMETER.
.-13MBORE SIZE, 13 MM DIAMETER.
.-14BORE SIZE, 7/8 INCH DIAMETER.
.-625BORE SIZE, 0.6250 INCH DIAMETER.
.-8BORE SIZE, 1/2 INCH DIAMETER.
.11/8 FULL.
.21/4 FULL.
.33/8 FULL.
.41/2 FULL.
.55/8 FULL.
.63/4 FULL.
.77/8 FULL.
.8100 PERCENT FULL
.9DIP.
.AINTERNAL REDESIGN.
.A30 DEGREE CONTACT ANGLE, ANGULAR CONTACT BALL BEARINGS.
.ABANDOK B.
.ACANDOK C.
.AEAEROSHELL 15.
.AE3ABEC-3 TOLERANCE.
.AE5ABEC-5 TOLERANCE.
.AFAEROSHELL 17.
.AKANDOK 260.
.ANANDEROL L-423 OIL.
.ARAEROSHELL 5.
.ASAEROSHELL 7.
.ATAEROSHELL 16.
.AWAEROSHELL 22.
.AXAEROSHELL 6.
.BINTERNAL REDESIGN.
.B40 DEGREE CONTACT ANGLE, ANGULAR CONTACT BALL BEARINGS.
.BSX8388A (BATCO) .
.BTBEACON 325.
.CINTERNAL REDESIGN.
.C15 DEGREE CONTACT ANGLE, ANGULAR CONTACT BALL BEARINGS.
.C2TIGHT FIT, AFBMA CLASS 2.
.C3LOOSE FIT, AFEMA CLASS 3.
.C4EXTRA LOOSE FIT, AFBMA CLASS 4.
.CASPHERICAL ROLLER BEARING.
.CCSTANDARD, NON-INTERCHANGEABLE FIT, CYLINDRICAL ROLLER BEARINGS.
.CC2LESS THAN STANDARD NON-INTERCHANGEABLE FIT, CYLINDRICAL BEARINGS.
.CC4GREATER THAN CC3 FIT, CYLINDRICAL ROLLER BEARINGS.
.CCSGREATER THAN CC FIT, CYLINDRICAL ROLLER BEARINGS.
.CDSPHERICAL ROLLER BEARING.
.CEELECTRIC MOTOR QUALITY BEARING AND FIT.
.CHCHEVRON OHT.
.CHSWATER PUMP BEARING WITH SLINGER RING.
.CMELECTRIC MOTOR QUALITY BEARING AND FIT.
.CTELECTRIC MOTOR QUALITY BEARING AND FIT.
.DSTEEP CONTACT ANGLE, TAPERED ROLLER BEARING.
.DADOW CORNING DC99 – NO. 2.
.DBSUPERNAL GREASE NO. 72832.
.DBDOW CORNING FS3451 – NO. 2.
.DBDUPLEX PAIR, BACK-TO-BACK MOUNTING.
.DDUTWO RUBBER CONTACT SEALS.
.DEDC41.
.DFDC44.
.DHDOW CORNING 510.
.DHWATER PUMP BEARING, DULITED AND HANED PARTS.
.DPDUPLEX PAIR, FACE-TO-FACE MOUNTING.
.DSDC FS 1291.
.DTDC33.
.DTDUPLEX PAIR, TANDEM MOUNTING.
.DUSINGLE RUBBER CONTACT SEAL.
.DVDC FS 1292.
.EBEARING WITH SLOT OR KEYWAY.
.E100SPECIAL BEARINGS (MIL-B-17931C).
.E101GREASE QUANTITY AND TEFLON SEAL ELEMENT, SPECIAL.
.E4OUTER RING RELUBRICATION FEATURE, SPHERICAL BEARINGS.
.ES11SPECIAL GREASE VOLUME.
.ES12SPECIAL CARTON MARKING.
.ES13SPECIAL CORNER RADIUS.
.ES15SPECIAL END PLAY.
.ES16SPECIAL PROCESSING.
.ES17SPECIAL CLEANING.
.ES18RADIAL PLAY LIMITS SPECIAL.
.ES19SPECIAL CLEANING, LUBRICATION.
.ES20RADIAL PLAY, GAGING LOADS, SPECIAL.
.ES21HEAT STAB, FOR 325°F OPERATION.
.ES22XT RADIAL PLAY, SPECIAL.
.ES24(MIL-B-17931A) , AMENDMENT 2, LOW NOISE LEVEL.
.ES25HIGH-SPEED TEST.
.ES26DULITE PROCESSED.
.ES27END PLAY AND TILT LIMITS, SPECIAL.
.ES28DULITE PROCESSED.
.ES29SPECIAL SHIELD MARKING.
.ES3100 PERCENT SPEED TEST, LOW NOISE LEVEL.
.ES30QUALITY AUDIT, SPECIAL.
.ES31TORQUE LIMITS, SPECIAL.
.ES32SPECIAL INSPECTION.
.ES33LOW NOISE LEVEL.
.ES34ULTRASONIC CLEANING.
.ES35FLUSHNESS TOLERANCE SPECIAL.
.ES36SPECIAL IDENTIFICATION.
.ES37DULITE SHIELD.
.ES38SPECIAL END PLAY.
.ES39ELECTRONIC NOISE TESTING.
.ES40HEAT STABILIZED, SPECIAL.
.ES41STABILIZATION FOR 375 DEG F OPERATION.
.ES42“HS 2” MARKING ON OUTER.
.ES43GREASE CONTROL, SPECIAL.
.ES44REDUCED INSPECTION LIMITS.
.ES45LAPPED INNER FACE.
.ES46OVERSIZE O.D. ‘ S.
.ES47SPECIAL FOR RAILROAD APPLICATION.
.ES48SPECIAL O.D. TOLERANCE.
.ES49SHIELD IDENTIFICATION, SPECIAL.
.ES50REWORK IDENTIFICATION.
.ES51SPECIAL TOLERANCES.
.ES52SOLVENT CLEAN PARTS , SPECIAL .
.ES53SPECIAL PROCESSING.
.ES54SPECIAL FOR RAILROAD APPLICATIONS.
.ES55SPECIAL 77R6. /
.ES56RADIAL LOOSENESS CHECK,_ SPECIAL.
.ES57SPECIAL O.D. CORNER.
.ES58HIGH POINT MARKING ON INNER RING.
.ES59O.D. CODING.
.ES6CERTIFIED QUALITY CONTROL.
.ES60SPECIAL GREASING.
.ES61ES-41 AND SPECIAL GREASING.
.ES62SHIELD OR SEAL ASSEMBLY, SPECIAL.
.ES63SPECIAL 7038.
.ES65SPECIAL MARKING INSTRUCTIONS.
.ES66SPECIAL IDENTIFICATION.
.ES67SPECIAL GREASE AND QUANTITY.
.ES68SPECIAL GREASE QUANTITY.
.ES7SPECIAL PROCESS, SPECIAL CARTON MARKING.
.ES70SPECIAL MARKING.
.ES71SPECIAL WIDTH TOLERANCE.
.ES72SPECIAL LUBRICATION.
.ES73SPECIAL PROCESSING.
.ES74SPECIAL RING MARKING.
.ES75BEARINGS SERIAL NUMBERED.
.ES82RELUBE TYPE SHIELDS.
.ES83ELECTRO-GALVANIZING.
.ES84SPEC, INTERNAL CLEARANCE AND SPECIAL GREASE QUANTITY.
.ES85SPECIAL GREASE QUANTITY.
.ES9(MIL-B-17931A) , AMENDMENT 1, LOW NOISE LEVEL.
.ESIHAND SPIN TEST, LOW TORQUE.
.ESSSHIELD CLEARANCE 0.003 INCH, SPEC, TOLERANCE.
.ESSLOW NOISE LEVEL.
.FSINGLE SHIELD, DOUBLE-ROW BALL BEARINGS.
.FFTWO SHIELDS, DOUBLE-ROW BALL BEARINGS.
.FMFISKE LUBRIPLATE – MULTI-LUBE A.
.FTFISKE LUBRIPLATE 210.
.GSNAP RING ON BEARING.
.GNRSNAP RING GROOVE ON BEARING, NO SNAP RING.
.GSSNAP RING ON SAME SIDE OF BEARING AS SHIELD.
.HPHUMBLE OIL UNIVIS P38.
.HXHUMBLE OIL UNIREX NO. 2.
.JPRESSED STEEL RETAINER, TWO-PIECE RIBBON TYPE.
.KTAPERED BORE BEARING 1:12.
.K30TAPERED BORE BEARING 1:30.
.KHKEYSTONE 89H.
.KYDUPONT, KRYTOX 240AC.
.LULUBRIKO M24.
.MMACHINED BRONZE RETAINER.
.MMEDIUM FIT, AFBMA CLASS 0.
.MTMOBIL-TEMP £1 SOCONY VACUUM.
.NSNAP RING GROOVE IN OUTER RING.
.NFNON-FLUID OIL CP. F924.
.NGNON-FLUID OIL CO. G-60.
.NRNOX – RUST 509.
.NRSNAP RING IN OUTER RING.
.NSNON-FLUID OIL CO. S-59.
.NWNON-FLUID OIL CO. W-56.
.OS2WATER PUMP BEARING, SHAFT 0.002 INCH OVERSIZE.
.OS3WATER PUMP BEARING, SHAFT 0.003 INCH OVERSIZE.
.PEPETROLATUM
.RRO.D. RIDING TRASH GUARD RUBBER CONTACT SEALS.
.RSFACE RIDING RUBBER CONTACT SALES.
.RYRYKON 12.
.SASHELL ALVANIA $2
.SBSHELL XSG6409.
.SCSHELL CYPRINA £3.
.SDSHELL DARINA J2.
.SESHELL DARINA EP.
.SFSHELL DARINA FL.
.SGSTANDARD GREASE CODE.
.SLSHELL ALVANIA 13.
.SOSTANOIL 15.
.SPSHELL ALVANIA $2 EP.
.SWSOUTHWEST GREASE AND OIL CO., CODE 5682.
.SXSHELL DARINA AX.
.TFACE RIDING TRASH GUARD RUBBER CONTACT SEAL.
.TTIGHT FIT, AFBMA CLASS 2.
.TBTEXACO PREMIUM BRB.
.TCTEXAS CAPELLA B.
.TETEXAS EP 2324 HI-TEMP.
.THTEXAS 1999 HI-TEMP.
.TLASHLAND OIL TECTYL 900.
.TMTEMPLUBE 124.
.TRTEXAS REGAL STARFAK AFB-2.
.TTTWO FACE RIDING TRASH GUARD RUBBER CONTACT SEALS.
.TUTEXAS 1996 UNI-TEMP 500.
.TXTEXAS 1692.
.UCSUPERMIL GREASE NO. 31052.
.UFASU 40.
.UNUNOBA JL UNION OIL.
.USASU 06752 (AMERICAN OIL) .
.UTASU 100.
.VLABYRINTH RUBBER SEAL.
.VACHEVRON BRB2
.VSCHEVRON SRI
.WTWO LABYRINTH RUBBER SEALS.
.WPRESSED STEEL RETAINER, ONE-PIECE TYPE.
.WNWINDSOR L245X
.XREDESIGNED BOUNDARY DIMENSION OF LESS THAN + 1 MM.
.XLEXTRA LOOSE FIT, AFBMA CLASS 3.
.XTEXTRA TIGHT FIT, LESS THAN AFBMA CLASS 2.
.YPRESSED BRASS RETAINER, TWO-PIECE, RIBBON TYPE.
.ZSINGLE SHIELD.
.ZZGREASE SPE CIS PART OF ES NUMBER.
.ZZTWO SHIELDS.
7.SINGLE SHIELD.
77.TWO SHIELDS.
8.FELT SEAL.
87.ONE FELT SEAL, ONE SHIELD.
88.TWO FELT SEALS.
89.ONE FELT SEAL, ONE TEFLON SEAL.
9.TEFLON SEALS.
99.TWO TEFLON SEALS.
H.HEAVY SERIES CUP OR CONE, TAPERED ROLLER BEARINGS.
HH.EXTRA HEAVY SERIES CUP OR CONE, TAPERED ROLLER BEARINGS.
HM.MEDIUM-HEAVY SERIES CUP OR, CONE, TAPERED ROLLER BEARINGS.
L.LIGHT SERIES CUP OR CONE, TAPERED ROLLER BEARINGS.
LL.EXTRA LIGHT SERIES CUP OR CONE, TAPERED ROLLER BEARINGS.
LM.MEDIUM-LIGHT SERIES CUP OR CONE, TAPERED ROLLER BEARINGS.
M.MAX-TYPE, FILLING SLOT BALL BEARINGS.
M.MEDIUM SERIES CUP OR CONE, TAPERED ROLLER BEARINGS.
MS.SHIELD AND LOADING SLOT ON SAME SIDE, BALL BEARINGS.
N.CYLINDRICAL BEARING, DOUBLE FLANGED INNER, OPEN OUTER.
NF.CYLINDRICAL BEARING, DOUBLE FLANGED INNER, SINGLE FLANGED OUTER.
NH.CYLINDRICAL BEARING, TWO-PIECE INNER, DOUBLE FLANGED OUTER.
NJ.CYLINDRICAL BEARING, SINGLE, FLANGED INNER, DOUBLE FLANGED OUTER.
NN.CYLINDRICAL BEARING, DOUBLE-ROW, FLANGED INNER, OPEN OUTER.
NU.CYLINDRICAL BEARING, OPEN INNER, DOUBLE FLANGED OUTER.
R.INCH DIMENSION SERIES BALL BEARINGS.
RA.POWER TRANSMISSION BALL BEARINGS, PRE-LUBRICATED.
RAG.POWER TRANSMISSION BALL BEARINGS, RELUBRICATEABLE.
S.CARTRIDGE BEARING SERIES.
SB.POWER TRANSMISSION BEARING, WIDE INNER, PRELUBRICATED.
SBG.POWER TRANSMISSION BEARING, WIDE INNER, RELUBRICATEABLE.
SE.ECCENTRIC LOCKING COLLAR FOR POWER TRANSMISSION.
SF.FOUR-BOLT FLANGE UNIT, STANDARD, RELUBRICATEABLE.
SFC.FOUR-BOLT FLANGE UNIT, RA UNIT, PRELUBRICATED.
SFT.TWO-BOLT FLANGE UNIT, STANDARD, RELUBRICATEABLE.
SFTC.TWO-BOLT FLANGE UNIT, RA UNIT, PRELUBRICATED.
SP.STANDARD HEIGHT PILLOW BLOCK, RELUBRICATEABLE.
SPC.STANDARD HEIGHT PILLOW BLOCK, RA UNIT, PRELUBRICATED.
SPEC.REVISED HEIGHT PILLOW BLOCK, RA UNIT, PRELUBRICATED.
SPH.REVISED HEIGHT PILLOW BLOCK, RELUBRICATEABLE.
STU.TAKE-UP UNIT BLOCK, RELUBRICATEABLE.
STUC.TAKE-UP UNIT BLOCK, RA UNIT, PRELUBRICATED.
WC.FELT SEAL SERIES BEARINGS, WIDE OUTER RING.
X.SPECIAL BEARING SERIES.

Here at TFL-Bearing, we provide a full range of NSK brand products at a very competitive price, including high-quality needle roller bearings, cross roller bearings, thrust bearings, roller bearings, ball linear motion rolling guides, roller rolling Guide rails, linear motion rolling guides, precision positioning tables, and machine parts. Most products can be shipped the same day or the next day.

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