Ball bearing suffix
List of suffixes for rolling bearings
(not complete and no guarantee of accuracy)
| NSZ | DESCRIPTION |
| A | Modified internal construction with the same main dimensions. The meaning of the symbol is often tied to the respective bearing row. |
| A | Change of interior design |
| A | Single row radial ball bearings with high load capacity |
| A | Single row angular contact ball bearings, polyamide cage |
| A | Double row radial ball bearings, without groove, polyamide cage |
| A | Double row angular contact ball bearings, without groove, polyamide cage |
| A | V-ring seal version A for SNC bearings (optional FS seal) |
| A1 | Demountable |
| ABEC-1 | Tolerance class 1 of ABEC, corresponds to DIN 620 (P0) / ISO 492 (Class normal) |
| ABEC-3 | Tolerance class 3 of ABEC, corresponds to DIN 620 (P6) / ISO 492 (Class 6) |
| ABEC-5 | Tolerance class 5 of ABEC, corresponds to DIN 620 (P5) / ISO 492 (Class 5) |
| ABEC-7 | Tolerance class 7 of ABEC, corresponds to DIN 620 (P4) or ISO 492 (Class 4) |
| ABEC9 | Tolerance class 9 of ABEC, corresponds to DIN 620 (P2) or ISO 492 (Class 2) |
| AC | Single row angular contact ball bearing with a contact angle of 25° |
| ACD | Single row angular contact ball bearing with a contact angle of 25° and optimized internal construction. |
| AD | Contact angle 25° |
| ADA | Wide ring grooves in the outer ring, two by a retaining ring inner rings held together |
| ADB | Modified internal construction, modified ring grooves in the outer ring; two-part inner ring held together by a retaining ring |
| AS | Needle roller bearing with lubrication holes in the outer ring The number after the suffix AS is the number of holes. |
| AS2 | Bearing outer ring with 2 lubrication holes in offset planes (housing) |
| 3AS | Grease: Shell / Alvania Grease S3 (-25 to +135°C) |
| 2AS | Grease: Shell / Alvania Grease S2 (-25 to +120°C) |
| ASR | Needle roller bearing with circumferential groove and lubrication hole in the outer ring. The number after the suffix ASR indicates the number of holes. |
| Axx(x) | "A" in combination with a two- or three-digit number indicates variants of the standard design that cannot be identified by the usual suffixes. |
| B | 32210 B: Tapered roller bearing with increased contact angle (larger than version 32210) |
| B | 7210 B: Single row angular contact ball bearing with a contact angle of 40° |
| B | Modified roller-guided double-comb cage made of brass |
| B | Standard design of spherical roller bearings |
| B | Contact angle 40° for angular contact ball bearings |
| B | 32° for 2-row angular contact ball bearings |
| B | 40° for single row angular contact ball bearings |
| B | 20° for tapered roller bearings |
| B | Bearing with spherical outer ring surface (housing) |
| B1 | Different or modified internal construction with the same main dimensions. The meaning of the symbol is often linked to the bearing series. Examples: |
| B2 | Tapered roller bearings according to ABMA standard with flange on the outer ring |
| B20 | Reduced width tolerance |
| B3 | Precision according to ABEC 3 standards |
| B5 | Precision according to ABEC 5 standards |
| B7 | Precision according to ABEC 7 standards |
| BE | Single row angular contact ball bearing with a contact angle of 40° and optimized internal design. |
| BEJ | Single row angular contact ball bearing with a contact angle of 40°, optimized internal construction and cage made of sheet steel, ball guided |
| BEM | Single row angular contact ball bearing with a contact angle of 40°, optimized internal construction and solid brass cage |
| BEP | Single row angular contact ball bearing with a contact angle of 40° and optimized internal design, with injection-molded cage made of glass fiber reinforced polyamide 66 |
| BEY | Single row angular contact ball bearing with a contact angle of 40°, optimized internal construction and cage made of sheet brass, ball guided. |
| BG | Single row angular contact ball bearings for universal pairing without preload |
| BK | B + K |
| Bxx(x) | “B” in combination with a two- or three-digit number indicates variants of the standard version that cannot be identified by the usual suffixes. Example: |
| 2C | Radial insert bearing on both sides with centrifugal disk |
| 5C | Grease: Chevron / SRI-2 (-29 to +177°C) |
| C | Contact angle 15° for angular contact ball bearings |
| C | Increased contact angle for tapered roller bearings |
| C | Index of internal design for tapered roller bearings |
| C0 | High precision bearing clearance |
| C02 | Particularly tight tolerance for the running accuracy of the inner ring |
| C04 | Particularly tight tolerance for the running accuracy of the outer ring |
| C08 | C02 + C04 |
| C083 | C02 + C04 + C3 |
| C1 | Bearing clearance less than C2 |
| C10 | Tight tolerance for bore and outside diameter |
| C12 | Index of internal design for tapered roller bearings |
| C2 | Bearing clearance less than normal (CN) |
| C2 | Bearing clearance smaller than normal |
| C3 | Bearing clearance greater than normal (CN) |
| C4 | Bearing clearance greater than C3 |
| 5C | Grease: Chevron / SRI-2 (-29 to +177°C) |
| C5 | Bearing clearance greater than C4 |
| C9 | High precision game |
| CA | Single row angular contact ball bearings: low axial clearance before installation |
| CAC | Spherical roller bearings according to CA design with reinforced rolling element guidance |
| CB | Single row angular contact ball bearings: normal axial clearance before installation |
| CB1 | Universal angular contact ball bearings; two bearings in O or X arrangement; the axial bearing clearance before installation is normal. |
| CB2 | Special axial clearance of double row angular contact ball bearings |
| CC | Closed stainless steel closure for housing bearings |
| CC | Single row angular contact ball bearings: larger axial clearance before installation |
| CC1 | Spherical roller bearings according to CA design with reinforced rolling element guidance |
| CC2 | Universal angular contact ball bearings; two bearings in O or X arrangement; the axial bearing clearance before installation is larger than normal (CB) |
| CD | Single row angular contact ball bearing with a contact angle of 15° and optimized internal design |
| CL0 | Inch tapered roller bearing with tolerances according to class 0 of ANSI-ABMA standard 19.2:1994 |
| CL00 | Inch tapered roller bearing with tolerances according to class 00 of ANSI-ABMA standard 19.2:1994 |
| CL3 | Inch tapered roller bearing with tolerances according to Class 3 of ANSI-ABMA standard 19.2:1994 |
| CL7C | Tapered roller bearings with special friction behavior and higher running accuracy |
| CLN | Tapered roller bearings with tolerances according to ISO tolerance class 6X |
| CLN | Tapered roller bearings with tolerances according to ISO tolerance class 6X |
| CM09 | Special bearing clearance, between 5 and 13 ?m |
| CM13 | Special bearing clearance, between 9 and 17 ?m |
| CM17 | Special bearing clearance, between 13 and 21 ?m |
| CM21 | Special bearing clearance, between 17 and 25 ?m |
| CM25 | Special bearing clearance, between 21 and 29 ?m |
| CM30 | Special bearing clearance, between 25 and 35 ?m |
| CM35 | Special bearing clearance, between 30 and 40 ?m |
| CM40 | Special bearing clearance, between 35 and 45 ?m |
| CM45 | Special bearing clearance, between 40 and 50 ?m |
| CM50 | Special bearing clearance, between 45 and 55 ?m |
| CMxx | Average bearing clearance in microns for ball bearings from diameter 10 to diameter 50mm |
| CN | The above code letters are also used with the bearing clearance classes C2, C3, C4 and C5, e.g. C2H. |
| CNF | F Reduced and shifted clearance range (restricted to the upper quarter of the actual clearance and the lower quarter of the next higher clearance class). |
| CNH | H Reduced clearance range corresponding to the upper clearance range |
| CNL | L Reduced clearance range corresponding to the low clearance range |
| CNL, | Bearing clearance for precision miniature bearings |
| CNM | M Reduced clearance range corresponding to the two middle quarters of the clearance range |
| CNP | CNP: Upper half of the Normal clearance range and lower half of the C3 clearance range |
| CNR | R Reduced clearance range corresponding to "paired rings" according to ISO 5753:1981. |
| CNS | Bearing clearance for precision miniature bearings |
| CO | Open stainless steel closure for housing bearings |
| CS | Sheet steel reinforced sealing disc made of acrylonitrile butadiene rubber (NBR) on one side of the bearing |
| 2CS | Sheet steel reinforced sealing discs made of acrylonitrile butadiene rubber (NBR) on both sides of the bearing |
| CS2 | Sheet steel reinforced sealing disc made of fluoro rubber (FKM) on one side of the bearing |
| 2CS2 | Sheet steel reinforced sealing discs made of fluoro rubber (FKM) on both sides of the bearing |
| CS5 | Sheet steel reinforced sealing disc made of hydrogenated acrylonitrile butadiene rubber (H-NBR) on one side of the bearing |
| 2CS5 | Sheet steel reinforced sealing discs made of hydrogenated acrylonitrile butadiene rubber (H-NBR) on both sides of the bearing |
| CSxx | Average bearing clearance in microns (1 micron = 1?m =0.001mm) |
| CT1 | Low temperature storage -60°C |
| CV | Modified internal design, full complement roller set |
| CxNA | Reduced clearance areas (average clearance however identical), grouped rings |
| D | Modified interior construction |
| D | Increased contact angle for tapered roller bearings |
| D | Lubrication holes (without grooves) |
| D | High precision angular contact ball bearings with lubrication |
| D | Ductile iron (housing) |
| D** | SNR lubricating greases |
| D0 | Groove and lubrication holes not present (if standard) |
| D1 | Groove and lubrication holes in the outer ring |
| D2 | D1 + anti-rotation ball on outer diameter for bearing inserts |
| D8 | Deep groove ball bearings with open design, also available with cover plates or seals as standard, but without the need for recesses in the outer ring. |
| THERE | Modified ring grooves in the outer ring; two-part inner ring held together by a retaining ring |
| DB | Two deep groove ball bearings matched for installation in an O-arrangement |
| DB | O-arrangement |
| DBA | A: Light preload (2) |
| DBB | B: Medium preload (2) |
| DBC | C: High preload (2) |
| DBC | C: Special axial clearance in ?m |
| DBCA | CA: Axial clearance smaller than normal (CB) (1, 2) |
| DBCB | CB: Normal axial clearance (1, 2) |
| DBCC | CC: Axial clearance greater than normal (CB) (1, 2) |
| DBG | G Special prestress in daN |
| DBGA | GA: Light preload (1) |
| DBGB | GB: Medium preload (1) |
| DD | Sealing discs with lip seal on both sides |
| DDU | Contact seal made of acrylonitrile butadiene rubber (NRB) with or without sheet steel reinforcement on one bearing side |
| DF | Two single-row deep groove ball bearings, single-row angular contact ball bearings or single-row tapered roller bearings for installation in pairs in an X arrangement. The additional designations for the axial bearing clearance and preload are described in DB. |
| DG | Two single-row angular contact ball bearings for universal installation in pairs in an O, X or tandem arrangement. The additional designations for the axial bearing clearance and preload are described at DB. |
| DH | Single direction axial ball bearing with two housing washers |
| DR | Two single row deep groove ball bearings or cylindrical roller bearings, matched for uniform radial load distribution |
| DS | Slotted needle roller |
| DS | Double lip seal for SNC bearings |
| DS1 | Single direction axial ball bearing with two shaft washers |
| DS2 | Slotted radial needle roller and cage assembly |
| DT | Two single-row deep groove ball bearings, angular contact ball bearings or tapered roller bearings, matched for installation in pairs in a tandem arrangement. In matched tapered roller bearings, the design and arrangement of the intermediate rings between the inner and outer rings are designated by a two-digit number immediately after DT. |
| DT | T-arrangement |
| E | Different internal construction with the same main dimensions. The meaning of the symbol is often linked to the respective bearing series, but usually indicates a rolling bearing set with a higher load capacity. |
| E | Bearings with increased load capacity |
| E | Optimized internal design |
| E | Reinforced roller set |
| E | Increased load capacity for cylindrical roller bearings and spherical roller bearings |
| EA | Spherical roller bearings with increased load capacity and with sheet steel cage |
| EC | Optimized internal construction; more or larger rollers and modified roller-board contact |
| EC | Sealing for SNC bearings |
| ECA | Spherical roller bearings according to CA design, but with optimized roller bearing set for higher load capacity |
| ECAC | Spherical roller bearings according to CAC design, but with optimized roller bearing set for higher load capacity |
| ECJ | Optimized internal construction, with sheet steel cage |
| ECM | Optimized internal construction, roller guided with brass cage |
| ECP | Optimized internal construction, with plastic cage (standard version) |
| EEE | Two-sided seal |
| EM | Spherical roller bearings with increased load capacity and with solid cage |
| En | Special cambering of the rollers |
| Exx(x) | E in combination with a two- or three-digit number indicates variants of the standard design that cannot be identified by the usual suffixes. |
| F | Solid cage made of steel or special cast iron, guided by rolling elements; different cage designs or cage materials are identified by numbers appended to the suffix F, e.g. F1. |
| F | Rolling element guided double comb cage made of steel |
| F | Solid-walled bearing without openings e.g. SN520F |
| F | Four cast-in foot screw holes (housing) |
| F1 | Solid-walled bearing with openings e.g. UCP320F1 |
| F1 | Solid steel cage |
| 2F | Standard contact seal with additional upstream centrifugal disc on both sides of the bearing |
| F2 | Bearing without mounting holes e.g. UCP322F2 |
| 2F | double row needle bearing |
| F3 | Solid cage made of parting steel |
| F600 | High temperature bearings for tunnel kiln cars |
| F604 | High temperature bearings for lubricated and protected tunnel kiln cars |
| F800 | High load capacity spherical roller bearings for vibration gear applications |
| FA | Outer ring guided double comb cage made of steel |
| FA101 | High and low temperature versions –40 °C to +180 °C |
| FA106 | Bearings specially tested for noise |
| FA107 | Bearing with lubrication holes on the mounting side |
| FA125 | with Corrotect® coating |
| FA164 | High temperature version up to +250 °C |
| Inner ring guided double comb cage made of steel | |
| FD | Food-grade grease |
| FP | Steel window cage; rolling element guided |
| FS | Felt strip seal for SNC bearings |
| FT150 | Double-sided sealing discs high temperature resistant (-150 degrees) |
| FT150ZZ | Protected bearings for high temperatures up to +150°C |
| G | Outer ring only for tapered roller bearings |
| G | Universal angular contact ball bearings; Two bearings in an O or X arrangement have a fixed axial clearance before installation. |
| G | Universal version |
| G | Disassembly sleeves – modified thread – conformity according to ISO 2982-1 |
| G | Fixed bearing without ring lock e.g. SD3130G |
| G | Inner ring + rollers (+cage) for tapered roller bearings |
| G(n) | Bearings with special mounting holes (n=1,2,3...). Example: UCHB204G6 |
| G.. | A three-letter number after the grease code indicates that the filling level deviates from the norm: The numbers 1, 2 and 3 indicate a smaller filling level than the standard amount, 4 to 9 a larger filling level |
| G1 | Solid brass cage |
| G14 | Polyamide cage |
| G15 | Glass fibre reinforced polyamide cage |
| G2 | Relubrication system for bearing inserts |
| GB | Single row angular contact ball bearings for installation in pairs; two bearings in an O or X arrangement have a medium preload before installation. |
| GC | Single row angular contact ball bearings for installation in pairs; |
| GC | Two bearings in an O or X arrangement have a strong preload before installation. |
| GD2 | 2 universal bearings in a single housing |
| GD2 | 2 universal bearings in a single housing |
| ENG | E: Extreme pressure grease (EP grease) |
| GF | F: Food grade grease |
| GH | H, J: Grease for high temperatures, e.g. from -20 to +130°C |
| GH | Bearing preload high |
| GJN | Grease with polyurea thickener according to NLGI consistency class 2 for -30 to +150 °C (normal filling volume) |
| GL | L: Grease for low temperatures, e.g. from -50 to +80°C |
| GL | Bearing preload slightly |
| GM | Bearing preload medium |
| GM | M: Grease for medium temperatures, e.g. from -30 to +110°C |
| GN | Bearing preload normal |
| G.S.. | Housing washer of an axial cylindrical roller bearing. The inner diameter is slightly larger than the shaft diameter. See also WS.. (shaft washer) |
| GW | W, X: Grease for low and high temperatures, e.g. from -40 to +140°C |
| GXN | Grease with polyurea thickener according to NLGI consistency class 2 for -40 to +150 °C, standard filling quantity |
| H | Clamping sleeves with oil injection device (e.g. AH24T48H) |
| H | Snap cage made of sheet steel, pressed and hardened. |
| H1 | Snap cage made of sheet steel, pressed and hardened |
| H2 | Needle roller bearing without inner ring, with reduced enveloping circle tolerance. Numbers following the letter H indicate the tolerance limit in ?m, e.g. /H+20+27 |
| HA | Bearings or bearing parts made of case hardened steel For more precise identification, the suffix HA is followed by one of the following numbers: |
| HA0 | 0 Complete bearings |
| HA1 | Case hardened inner and outer rings |
| HA2 | Case hardened outer ring |
| HA3 | Case hardened inner ring |
| HA4 | Case hardened rollers, inner and outer rings |
| HA5 | Case hardened rolling elements |
| HA6 | Case hardened outer ring and rolling elements |
| HA7 | Case hardened inner ring and rolling elements |
| HB | Bearings or bearing parts bainite hardened. For better identification, the suffix HB is followed by one of the numbers explained under HA. |
| HB1 | Bainite hardened inner and outer rings |
| HB2 | Bainite hardened outer ring |
| HB3 | Bainite hardened inner ring |
| HC | Bearings or bearing parts made of ceramic. For easier identification, the suffix HC is followed by one of the numbers explained under HA. |
| HE | Bearings or bearing parts made of steel melted in a vacuum. For easier identification, the suffix HE is followed by one of the numbers explained under HA. |
| HG | Special rolling bearing Hug Kontr. 2-part |
| HM | Bearings or bearing parts martensite hardened. For better identification, the suffix HM is followed by one of the numbers explained under HA. |
| HN1 | Inner and outer rings with special surface hardening |
| HT | Grease with polyurea thickener according to NLGI consistency class 2 for -40 to +150 °C (normal filling volume) |
| HT | Special internal design to accommodate axial loads on cylindrical roller bearings |
| HT2 | High temperature bearing +200°C |
| HT200 | Sealed bearings for high temperatures up to +200° C |
| HT200ZZ | Protected bearings for high temperatures up to +200° C |
| HTxxA | A: Filling level lower than standard |
| HTxxB | B: Filling level greater than standard |
| HTxxC | C: Filling level over 70% |
| HTxxF1 | F1: Filling level lower than standard |
| HTxxF7 | F7: Filling level greater than standard |
| HTxxF9 | F9: Filling level greater than 70% |
| AGM | Bearings or bearing parts made of stainless, hardenable steel. For better identification, the suffix HM is followed by one of the numbers explained under HA.HA |
| AGM | Y-bearing SKF: Bearing parts are made of stainless steel. The bearing is filled with food-grade grease. |
| HVZZ | Protected bearings for high speeds up to 700 000 N.Dm |
| IS | Needle roller bearing with lubrication hole in the inner ring; numbers after the suffix IS indicate the number of holes. |
| ISR | Needle roller bearing with circumferential groove and lubrication hole in the inner ring; numbers after the suffix ISR indicate the number of holes. |
| J | Cage made of sheet steel, pressed, roller-guided, unhardened; Only written if the sheet steel cage is not the standard cage for the bearing type. Example: Cylindrical roller bearing. |
| J2 | SKF tapered roller bearings: Sheet steel cage in design variant 2 |
| J2 DF | SKF tapered roller bearing set: two ready-to-install, matched single-row bearings in an X arrangement. |
| JH | Sheet steel snap cage; rolling element guided |
| JHA | Cage made of sheet steel, pressed and hardened, outer ring guided |
| JIS | Housing dimensions according to JIS B 1559 |
| JN | Sheet steel rivet cage; rolling element guided |
| JP | Sheet steel window cage; rolling element guided |
| JP1 | Sheet steel window cage; rolling element guided |
| JPA | Sheet steel window cage; guidance on the outer ring (support ring) |
| JPB | Sheet steel window cage; guide on the inner ring |
| JR | Cage made of two flat sheet steel discs, riveted, unhardened |
| JW | Cage made of sheet steel, unhardened and welded |
| K | Bearing has inner ring with tapered bore. Taper 1:12. Not suitable for mounting on cylindrical shaft! The bearing is mounted with an adapter sleeve (e.g. H.. adapter sleeves must be ordered separately) on a cylindrical shaft or without an adapter sleeve on a tapered shaft. |
| K7 | Housing with bearing seat according to tolerance K7 (housing) |
| K30 | Tapered bore, taper 1:30 |
| 5K | Grease: Kyodo Yushi / Multemp SRL (-40 to +150°C) |
| 6K | Grease: Klüber / Isoflex Super LDS 18 (-60 to +130°C) |
| KLL | Labyrinth seal on both sides (L-seal) (housing) |
| KRR | Lip seal on both sides (R-seal)(housing) |
| KTT | 3-lip seal on both sides (T-seal) (housing) |
| KTN9 | K + TN9 |
| L | Flange for NUP |
| L | Solid cage made of light metal; the different designs or materials are indicated by a number, for example L1 |
| -L | NUP without press plate |
| -L | NUP without flange |
| L1 | Solid cage made of riveted brass |
| L1 | Flange bearing with grease nipple and oil drain hole e.g. SN515L1Z |
| L3 | Three-lip seal for bearing inserts |
| L417 | Grease: Kyodo Yushi / E5 (-30 to +180°C) |
| L453 | Grease: Klüber / Asonic HQ72-102 (-40 to +180°C) |
| L4B | Bearing rings and rolling elements with special surface coating |
| L5 | Flange bearing with opening for grease nipple and oil drain hole |
| L5B | Rolling elements with special surface coating |
| L5DA | NoWear bearings with coated rolling elements |
| L627 | Grease: Exxon / Polyrex EM / Polyree (-25 to +170°C) |
| L7DA | NoWear bearings with coated rolling elements and inner ring raceways |
| LA | Riveted solid cage made of light metal with outer ring guide |
| LA | Labyrinth seal for SNC bearings |
| LB | Riveted solid cage made of light metal with inner ring guide |
| LB | Non-contact nitrile rubber seal (-25 to +120°C) |
| LBA | Non-contact polyacrylic rubber seal (-10 to +150°C) |
| LBA1 | Non-contact seal made of fluoroelastomer (-30 to +200°C) |
| LBA2 | Non-contact silicone seal (-100 to +200°C) |
| LFS | LFS (Low Friction Seal) seals on both sides of the bearing. Seal type: axial sealing lip, radial sealing lip in groove, non-contact on the bearing inner ring |
| LH | Contact nitrile seal low torque (-25 to +120°C) |
| LHA | Contact polyacrylic seal low torque (-10 to +150°C) |
| LHA1 | Fluorinated contact elastomer seal with low torque (-30 to +200°C) |
| LHA2 | Low torque contact silicone seal (-100 to +200°C) |
| LHA4 | Contact high nitrile seal with low torque (-20 to +130°C) |
| LHAX12 | Contact high polyacrylic seal with low torque (-10 to +150°C) |
| LHT | Grease filling for low and high temperatures (e.g. -40 to +140 °C) The two-digit number after the suffix LHT indicates the respective grease. An additional letter or a letter-number combination as mentioned under "HT" indicates that a non-standard filling level is used. |
| LHT23 | Grease with lithium thickener according to NLGI consistency class 2 for -50 to +140 °C (normal filling volume) |
| LLB | Non-contact nitrile rubber seal on both sides (-25 to +120°C) |
| LLBA | Non-contact polyacrylic rubber seals on both sides (-10 to +150°C) |
| LLBA1 | Non-contact seal made of fluoroelastomer on both sides (-30 to +200°C) |
| LLBA2 | Non-contact silicone rubber seal on both sides (-100 to +200°C) |
| LLH | Nitrile rubber seal in contact on both sides, low friction (-25 to +120°C) |
| LLHA | Polyacrylic rubber seal in contact on both sides, low friction (-10 to +150°C) |
| LLHA1 | Fluorinated contact seal made of elastomer on both sides, low friction (-30 to +200°C) |
| LLHA2 | Silicone seal in contact with both sides with low torque (-100 to +200°C) |
| LLHA4 | High nitrile seal in contact on both sides, low friction (-20 to +130°C) |
| LLHAX12 | High polyacrylic seal in contact on both sides, low friction (-10 to +150°C) |
| LLJ | Bearing with double lip seal and low torque |
| LLS | High torque triple lip seal bearing |
| LLU | Nitrile rubber seal in contact on both sides (-20 to +120°C) |
| LLUA | Polyacrylic rubber seal in contact on both sides (-15 to +150°C) |
| LLUA1 | Fluorinated elastomer seal in contact on both sides (-30 to +230°C) |
| LLUA2 | Silicone rubber seal in contact on both sides (-60 to +200°C) |
| LLUA4 | High nitrile rubber seal in contact on both sides (-20 to +140°C) |
| LLUAX12 | Double-sided friction seal with a high polyacrylic rubber content (15 to +175°C) |
| LO | Bearings without preservatives, but lubricated with a low viscosity oil; the oil used is indicated by the numbers after the letter combination LO, for example LO10 |
| LP | Window-type solid cage made of light metal, with butted or cleared pockets and inner or outer ring guide |
| LP03 | Durable standard grease (-20 to +80°C) |
| LP05 | Durable high-temperature grease (-20 to +120°C) |
| LP06 | Durable food-grade grease -10 to +100°C (permanently 80°C) |
| LP08 | Durable high-temperature lubricating grease for needles (-20 to +120°C) |
| LP08 | Special food-compatible solid lubricant |
| LPA | Light metal solid cage Window cage; Guide on the outer ring (housing) |
| LPB | Light metal solid cage Window cage; guide on the inner ring (shaft) |
| LPS | Like LP, but with lubrication grooves in the guide surfaces |
| LS | Contact seal made of acrylonitrile butadiene rubber (NBR) or polyurethane (AU) with or without sheet steel reinforcement on one side of the bearing |
| 2LS | Polyurethane (AU) contact seal on both bearing sides |
| 2LS8 | Contact seal made of synthetic rubber with sheet steel reinforcement on both bearing sides |
| LT | Grease with lithium thickener according to NLGI consistency class 2 for -55 to +110 °C (normal filling volume) |
| LT10 | Grease with lithium thickener according to NLGI consistency class 2 for -50 to +90 °C (normal filling volume) |
| LTZZ | Bearings with cover plates for low temperatures down to -60° C |
| LU | Contact nitrile seal (-20 to +120°C) |
| LUA | Contact polyacrylic seal (-15 to +150°C) |
| LUA1 | Contact fluorinated elastomer seal (-30 to +230°C) |
| LUA2 | Contact silicone seal (-60 to +200°C) |
| LUA4 | Contact high nitrile seal (-20 to +140°C) |
| LUAX12 | Frictional, highly polyacrylic seal (15 to +175°C) |
| LX | Seal with special sealing |
| M | Solid brass cage, rolling element guided |
| M1 | Solid brass cage, rolling element guided (web riveted) |
| M1A | Solid brass cage guide on the outer ring (riveted) |
| M1B | Solid brass cage guide on the inner ring (riveted) |
| M3 | Solid brass cage modified design; rolling element guided |
| M3A | Solid brass cage modified design; guide on the outer ring |
| M3B | Solid brass cage modified design; guide on the inner ring |
| MA | Solid brass cage guide on the outer ring (housing disc, housing) |
| MAS | Solid brass cage guide on the outer ring; with lubrication grooves |
| MB | Solid brass cage guide on the inner ring (wave washer, shaft) |
| MBS | Solid brass cage guide on the inner ring, with lubrication grooves |
| ML | Undivided window solid brass cage with milled, punched or cleared pockets and inner or outer ring guide |
| MON | Bearings without preservatives, but lubricated with a medium viscosity oil; the oil used is indicated by numbers after the letter combination MO, for example MO10. |
| MP | Solid brass window cage; rolling element guided |
| MP1 | Solid brass window cage; rolling element guided |
| MPA | Solid brass window cage; guide on the outer ring (housing) |
| MPB | Solid brass window cage; guide on the inner ring (shaft) |
| MPS | Like MP, but with lubrication grooves in the guide surfaces |
| MR | Solid, one-piece brass window cage with rolling element guide |
| MS1 | Housing base with two drilled screw holes (housing) |
| MS2 | Housing base with four drilled screw holes (housing) |
| MT | Grease filling for medium temperatures (e.g. -30 to +110 °C). MT followed by a two-digit number indicates the respective grease. An additional letter or a letter-number combination as mentioned under "HT" indicates that a non-standard filling level is used. |
| MT33 | Grease with lithium thickener according to NLGI consistency class 3 for -30 to +120 °C (normal filling volume) |
| MT47 | Grease with lithium thickener according to NLGI consistency class 2 for -30 to +110 °C (normal filling volume) |
| #N | Inner ring only for cylindrical roller bearings |
| N | Groove for ring locking on outer ring |
| N | Steel bearing e.g. P315N |
| N | Outer ring + rollers (+cage) for cylindrical roller bearings |
| N | Cast housing with groove for protective caps |
| N1 | A retaining groove in an outer ring face or housing disc |
| N1 | Bearing made of cast iron GS. Example P315N1 |
| N2 | Two retaining grooves, offset by 180°, in an outer ring face or housing disc |
| NPP | Lip seal on both sides (P-seal)(housing) |
| NO | Ring groove in the outer ring casing and associated snap ring |
| NRS | Groove and ring lock on opposite side (difference to standard) |
| EYELET | Bearing without clamping element (housing) |
| P | Injection-molded cage made of glass fiber reinforced polyamide 66 with rolling element guide |
| P | Sealing ring on one side of the bearing |
| P4 | Dimensional and running accuracy according to ISO tolerance class 4: Bearings with very high dimensional, form and running accuracy, more accurate than P5. |
| P42 | Precision class JIS 4 for dimensions and JIS 2 for concentricity |
| P43 | P4 + C3 |
| P4A | Dimensional and running accuracy according to ISO tolerance class 2 or ABMA tolerance class ABEC 9 |
| P5 | Tolerance class 5: Bearings with particularly high dimensional, form and running accuracy, more accurate than P6 |
| P52 | P5 + C2 |
| P6 | Accuracy according to ISO tolerance class 6: Bearings with increased dimensional, form and running accuracy. More accurate than normal tolerance |
| P62 | P6 + C2 |
| P63 | P6 + C3 |
| P63E | Precision P6 and air C3 / DIN standard electric motors |
| PA9 | Dimensional and running accuracy according to ABMA tolerance class ABEC 9 (better than P4) |
| PA9A | AsPA9 |
| PA9B | Like PA9, but running accuracy better than ABMA tolerance class ABEC 9 |
| PH | Injection-molded cage made of glass fiber reinforced polyetheretherketone (PEEK), with rolling element guide |
| PHAS | Injection-molded cage made of fiber-reinforced polyetheretherketone (PEEK), outer ring guide |
| PHAS | Injection-molded window cage made of glass fiber reinforced polyetheretherketone (PEEK), with lubrication grooves in the guide surfaces, with outer ring guide |
| PK | Precision class K for tapered rollers, series J |
| PM | Special precision bearings for electric motors |
| PP | Acrylonitrile butadiene contact seals on both sides of the rollers, support rollers and idler rollers |
| PP | Plastic axial sliding disc with molded sealing lip on both sides of the support roller forms a three-stage seal |
| PPA | Axial sliding rings made of polyamide 66 on both sides of the track, support and idler rollers and better profile of the track surface |
| PXn | Special precision with development index |
| Q | Optimized internal geometry and surface quality (tapered roller bearings) |
| QBC | Set of four matched deep groove ball bearings or angular contact ball bearings; two bearings in an O arrangement, the other two outside in an X or tandem arrangement, i.e. two tandem bearing pairs in an O arrangement |
| QBT | Set of four matched deep groove ball bearings or angular contact ball bearings; two bearings in an O arrangement, the other two in a tandem arrangement on one side of the pair in an O arrangement, i.e. 3 bearings in a tandem arrangement and an O arrangement with a fourth bearing |
| QD | Grease filling: from 5.0 to 10.0% |
| QE | Grease filling: from 7.5 to 12.5% |
| QF | Filling with grease: from 10.0 to 15.0% |
| QFC | Set of four matched deep groove ball bearings or angular contact ball bearings; as in /QBC, but with a centre pair in X arrangement, i.e. two tandem pairs in X arrangement |
| QFT | Set of four matched deep groove ball bearings or angular contact ball bearings; like /QBT, but with X arrangement on one side, i.e. three bearings in tandem arrangement and in X arrangement with a fourth bearing |
| QG | Grease filling: from 12.5 to 17.5% |
| QH | Filling with grease: from 15.0 to 20.0% |
| QJ | Grease filling: from 17.5 to 22.5% |
| QC | Grease filling: from 20.0 to 25.0% |
| QL | Grease filling: from 22.5 to 27.5% |
| QM | Grease filling: from 25.0 to 30.0% |
| QP | Grease filling: from 27.5 to 32.5% |
| Grease filling: from 30.0 to 40.0% | |
| QR | Set of four single row deep groove ball bearings or roller bearings, matched together to evenly distribute the radial load |
| QR | Grease filling: from 35.0 to 45.0% |
| QS | Grease filling: from 40.0 to 50.0% |
| QT | Set of four matched deep groove ball bearings or angular contact ball bearings in tandem arrangement |
| QT | Filling with grease: over 50% |
| R | Support rollers: crowned outer surface on the outer ring (standard). For cylindrical outer surface: see suffix X |
| R.. | Prefix letter: inner or outer ring of the bearing .. with roller set |
| R1 | Integrated external outer ring flange |
| R2 | Crowned raceway (track, support and rollers) |
| RF | Rubber centrifugal disc (pressed sheet steel centrifugal disc with vulcanized sealing lip) on one side of the Y-bearing |
| 2RF | Standard contact seal with additional rubber centrifugal disc on both bearing sides |
| RR | rust-protected by special coating Corrotect® |
| RS | Contact seal made of acrylonitrile butadiene rubber (NRB) with or without sheet steel reinforcement on one bearing side |
| RS1 | Sheet steel reinforced contact seal made of acrylonitrile butadiene rubber (NBR) on one side of the bearing |
| 2RS1 | Contact seal made of acrylonitrile butadiene rubber with sheet steel reinforcement on both bearing sides |
| RS1Z | Sheet steel reinforced contact seal made of acrylonitrile butadiene rubber (NBR) on one side and a cover plate on the other side of the bearing |
| 2RS | SKF Y-bearings: Standard seals with flinger on both sides |
| 2RS | RS contact seal on both sides of the bearing |
| RS2 | Sheet steel reinforced contact seal made of fluoro rubber (FKM) on one side of the bearing |
| 2RS2 | RS2 contact seal on both sides of the bearing |
| RSH | Sheet steel reinforced contact seal made of acrylonitrile butadiene rubber (NBR) on one side of the bearing |
| 2RSH | RSH contact seal on both sides of the bearing |
| RSL | Sheet steel reinforced, low-friction contact seal made of acrylonitrile butadiene rubber (NBR) on one bearing side |
| 2RSL | Low-friction RSL contact seal on both sides of the bearing |
| RSR | Plastic lip seal on one bearing side, old designation NPP(U) |
| 2RSR | Lip seal made of plastic on both sides, old designation NPP(U) |
| RZ | Sheet steel reinforced, low-friction seal made of acrylonitrile butadiene rubber (NBR) on one bearing side |
| 2Z | Low-friction, sheet steel reinforced sealing discs made of NBR (plastic) on both sides of the bearing |
| 2RZ | Low-friction RZ seal on both bearing sides |
| S | Round outer diameter |
| S | Needle bearing (INA): Lubrication hole in the outer ring (or sheet metal sleeve) |
| S | Spherical roller bearings: lubrication holes in the circumferential outer ring groove. See also W33 for FAG, NKE bearings |
| S | Spherical outer surface |
| S | No foot screw holes (housing) |
| S0 | Bearing rings heat treated, up to +150°C |
| S1 | Bearing rings heat treated, up to +200°C |
| S2 | Bearing rings heat treated, up to +250°C |
| S3 | Bearing rings heat treated, up to: +300°C |
| 5S | Grease: Shell / Aero Shell Grease 7 (-73 to +149°C) |
| S6.. | Deep groove ball bearing type 6.. made of stainless steel |
| SE1 | Sintered iron solid window cage; rolling element guided |
| SE1A | Sintered iron solid window cage; guide on the outer ring |
| SE1B | Sintered iron solid window cage; guide on the inner ring |
| ss | Radial insert bearing: Bore has hexagon socket (bore is not cylindrical!) |
| SM | Needle bearing with lubricating grease. The two-digit suffix number indicates the respective grease. |
| SN | Housing with threaded hole at measuring point 4 for the signal pickup (housing) |
| SNL | Split plummer block housing, optimized design (housing) |
| Snn | Special control (S20: Railway / S30: Wind energy) |
| SORT | Tolerance locations of the needle rollers of a needle roller and cage assembly. The numbers attached indicate the limit values of the tolerance locations in µm. Example: /SORT -2-4 |
| SP | Special accuracy class for spindle bearings of machine tools, dimensional accuracy approx. ISO tolerance class 4, running accuracy approximately according to ISO class 4. |
| SPC2 | as SP, but with reduced bearing clearance C2 |
| SPCN | as SP, but with normal bearing clearance CN |
| SQ.. | General: Special quality standard (factory standard). The following numbers after SQ indicate the standard. |
| ST | Modified interior design (low torque) |
| STVn | Modified interior design (n = 1, 2, 3...) (low torque) |
| sv | V-ring seal complete for SNC bearing |
| T | Window cage made of fabric-reinforced phenolic resin (hard fabric), rolling element guided |
| T | Threaded hole 1/4-28 UNF for grease nipple AH 1/4-28 SAE-LT on one side of the housing top for lubrication of the seal (housing) |
| T04 | Bearing inserts for operating temperatures down to - 40° C |
| T1 | Fabric cage with Bakelite coating |
| T2 | Cage made of plastic, nylon or Teflon |
| T20 | Bearing inserts for operating temperatures up to +200°C |
| T2X | Special polyamide cage for sealed ball bearings |
| T2X | Polyamide cage 4.6 for cylindrical roller bearings |
| T41A | FAG spherical roller bearings for oscillating loads. For applications see also VA405 (SKF) |
| T6 | Cage Peek for NN bearings |
| TA | Taconite seal for SNC bearings |
| TA | Hard fabric solid cage guide on the outer ring |
| TB | Hard fabric solid cage guide on the inner ring |
| TBT | Set of three matched single row deep groove or angular contact ball bearings; two bearings in an O arrangement, the third in a tandem arrangement |
| TD | Threaded hole 1/4-28 UNF for grease nipple AH 1/4-28 SAE-LT on both sides of the housing top for lubrication of both seals. (Housing) |
| TFT | Set of three matched single row deep groove or angular contact ball bearings; two bearings in X arrangement, the third bearing in tandem arrangement |
| TH | Snap cage made of fabric-reinforced phenolic resin (hard fabric), rolling element guided |
| THA | Snap cage made of fabric-reinforced phenolic resin (hard fabric); guide on the outer ring |
| THB | Hard fabric snap cage; guide on the inner ring |
| TKBAnnnn | Special cross brace. Nnnn: Order number |
| TKBNnnnn | Special cross brace. Nnnn: Order number |
| TKZnnnn | Special cross brace. Nnnn: Order number |
| TNS | One-piece or two-piece cage made of polyamide 66, rolling element guided |
| TN9 | One-piece or two-piece cage made of glass fibre reinforced polyamide 66, rolling element guided |
| TNH | Injection-molded snap cage made of fiber-reinforced polyetheretherketone (PEEK), rolling element guided |
| TNHA | Injection-molded cage made of fiber-reinforced polyetheretherketone (PEEK), outer ring guided |
| TNP | Polyamide window cage; rolling element guided |
| TPA | Hard fabric window cage; guide on the outer ring |
| TBP | Hard fabric window cage; guide on the inner ring |
| TR | Three single row deep groove ball bearings or cylindrical roller bearings, matched together for even radial load distribution. |
| TT | Set of three assembled single row deep groove or angular contact ball bearings, in tandem arrangement |
| TURU | Modified housing for oil lubrication with the corresponding seals (housing) |
| TV | Polyamide solid cage, rolling element guided |
| TCA | Polyamide solid cage guide on the outer ring |
| TVB | Polyamide solid cage guide on inner ring |
| TVH | Polyamide snap cage; rolling element guided |
| TVHB | Polyamide snap cage; guide on the inner ring |
| TVP | Polyamide window cage; rolling element guided |
| TVP2 | Polyamide window cage; rolling element guided |
| TVP3 | Polyamide window cage; rolling element guided |
| TVPB | Polyamide window cage; guidance on the inner ring |
| TVPB1 | Polyamide window cage; guidance on the inner ring |
| U | The suffix "U" with a single-digit number identifies a tapered roller bearing with a taper or outer ring and reduced width tolerance. |
| U | Reinforced version for tapered roller bearings |
| U2 | Width tolerance 0+0.05/0 mm |
| U2 | Y-bearing without clamping ring |
| U3 | Y-bearing with clamping ring without threaded pin fastening |
| U4 | Width tolerance 0+0.10/0 mm |
| UA | Spherical roller bearings with high load capacity for vibration gear applications |
| UH | High preload when assembled |
| UL | Slight preload in the assembled state. Preload is the force resulting from negative operating clearance or negative bearing clearance in the assembled state. |
| AROUND | Average preload when assembled |
| UP | Special accuracy class for spindle bearings of machine tools, dimensional accuracy approx. ISO tolerance class 4, running accuracy approx. ISO tolerance class 4. |
| UP | Ultra-high precision |
| V | The suffix "V", combined with a second letter, identifies a version group; if it is followed by a three or four-digit number, it designates versions that cannot be designated with the "standard suffixes". |
| V | Full complement bearing (increased number of rolling elements in the bearing, without cage) |
| V | Modified internal geometry of spherical roller bearings |
| V | Housing with a grease outlet opening in the housing base (housing) |
| VA | Rust-proof design (housing) |
| VA | Application-oriented designs |
| VA201 | Bearings for extreme temperatures (e.g. kiln cars) |
| VA208 | Bearings for extreme temperatures |
| VA216 | Bearings for extreme temperatures |
| VA228 | Bearings for extreme temperatures |
| VA301 | Bearings for electrical machines in electric rail vehicles |
| VA301 | Bearings for traction motors |
| VA305 | VA301 + special control routines |
| VA3091 | Bearings for traction motors with aluminium oxide coating on the outer surface of the outer ring with dielectric strength up to 1 000 V DC |
| VA3091 | VA301 + VL0241 |
| VA320 | Bearings for railway vehicle axle bearings according to EN 12080:1998 |
| VA350 | Bearings for rail vehicle axle bearings |
| VA380 | Wheelset bearings for rail vehicles according to EN 12080:1998, Class 1 |
| VA405 | Bearings for vibrating machines |
| VA406 | Bearings for vibrating machines with special polytetrafluoroethylene coating of the bore (PTFE coating) |
| VA701 | Bearings for paper machines |
| VA820 | Bearings for railway vehicle axle bearings according to EN 12080:1998 |
| VB | VB: Deviations in external dimensions |
| VC025 | Bearings with particularly wear-resistant, heat-treated parts for heavily contaminated environments |
| VE | VE: Deviations in external or internal dimensions |
| VE240 | Modified CARB bearing (greater axial displacement) |
| VE294 | Ring groove and six lubrication holes in the inner ring |
| VE447 | Shaft washer with three equally spaced supporting threads on one face (for hoist) |
| VE552 | Outer ring with three equally spaced supporting threads on one end face (for hoist) |
| VE553 | Outer ring with three equally spaced supporting threads on both end faces (for hoist) |
| VE632 | Housing disc with three equally spaced support threads on one end face (for hoist) |
| VE900 | Preliminary basic design |
| VG052 | A slotted cage made of polyethersulfone (PES) |
| VG114 | Surface-hardened window cage made of sheet steel |
| VGS | Inner ring raceway for cylindrical roller and needle bearings, pre-ground only; for cylindrical roller bearings replaced by the symbol /VU001 |
| VH | Full complement cylindrical roller bearing with self-retaining roller bearing set |
| VIT | Shaft seals based on fluoro rubber (FPM/FKM), more temperature-resistant than standard material NBR (NBR has suffix BA) |
| VL | VL: Coatings |
| VL0241 | Aluminium oxide coating on the outer surface of the outer ring with current breakdown strength up to 1 000 V DC |
| VL0271 | Aluminium oxide coating on the outer surface of the inner ring with current breakdown strength up to 1 000 V DC |
| Vn | Special camp: Combines other suffixes (n = 1, 2, 3...) |
| VP076 | Pressed steel sheet covers on each bearing side |
| VQ | VQ:Special dimensional, shape or running accuracy |
| VQ015 | Inner ring with crowned raceway for higher, maximum permissible misalignments |
| VQ424 | Running accuracy better than C08 |
| US | VS: Bearing clearance and preload |
| VS1 | Special tolerance for screen bearings |
| VT | VT: Lubrication |
| VT143 | High pressure grease with lithium thickener according to NLGI consistency class 2 for -20 to +110 ? (normal filling volume) |
| VT378 | Food-grade grease with aluminum thickener according to NLGI consistency class 2 for -25 to +120 °C (normal filling volume) |
| VU | VU: Other applications |
| VU001 | Pre-ground raceways |
| VV | Non-contact plastic seal on both sides, similar to 2RSL |
| W | Without circumferential groove and lubrication holes in outer ring |
| W20 | Three lubrication holes in the outer ring |
| W203B | Bearings made of "stainless steel". |
| W26 | Six lubrication holes in the inner ring |
| W3 | Bearing with clamping screw type nozzle needle |
| W33 | Circumferential groove and three lubrication holes in the outer ring |
| W33X | Circumferential groove and six lubrication holes in the outer ring |
| W5 | Bearing with clamping screw type nozzle needle, different from W3 |
| W513 | Six lubrication holes in the inner ring and the circumferential groove and three lubrication holes in the outer ring |
| W518 | Six lubrication holes in the inner ring and three lubrication holes in the outer ring |
| W6 | Bearing with clamping screw type nozzle needle, different from W5 |
| W64 | Solid oil filling |
| W77 | Clogged W33 lubrication holes |
| W.S.. | Shaft washer of an axial cylindrical roller bearing. See also GS.. (housing washer) |
| WT | Grease with polyurea thickener according to NLGI consistency class 2-3 for -40 to +160 °C (normal filling volume) |
| Y | a) Cylindrical outer surface of the outer ring of support and cam rollers, if normal variant with spherical outer ring |
| X1 | 1. Main dimensions changed according to ISO. |
| X2 | 2. Cylindrical raceway surface (track rollers, support rollers and idler rollers) |
| Xn | Special chamfer n:1,2... |
| Y | Cage made of brass sheet, rolling element guided |
| YPB | Brass sheet window cage; guide on the inner ring |
| 2Z | Cover plates made of sheet steel on both sides |
| Z | Cover plate made of sheet steel on one side |
| Z | Flange bearing with rubber seal type Z |
| Z1 | Combined needle bearings with cover |
| Z1 | Stainless steel protective cover |
| ZZ1 | On both sides |
| Z2 | Sheet steel cover plate on one side of the bearing |
| Z2 | Flange bearing with felt strip seal |
| Z2 | Flange bearing with felt strip seal |
| ZA | Removable protective cover |
| 2ZL | Cover disc with lamellar rings on both sides of the support roller |
| ZNR | Annular groove in the outer ring shell and associated snap ring as well as a cover plate made of sheet steel on the opposite side. |
| 2ZNR | Annular groove in the outer ring casing and associated snap ring as well as cover plates made of sheet steel on both sides. |
| 2ZR | Non-abrasive sheet steel cover plate on both sides of the bearing. |
| ZW | double row needle bearing |
| ZZ | Two-sided protective cover |
| ZZA | Cover plates removable on both sides |