| #N | Inner ring for cylindrical roller bearings only | |
| 2AS | Grease: Shell / Alvania Grease S2 (-25 to +120 °C) | |
| 2C | Radial insert ball bearing with a centrifugal disk on both sides | |
| 2CS | Sheet steel-reinforced sealing washers made of acrylonitrile-butadiene rubber (NBR) on both sides of the bearing | |
| 2CS2 | Sheet steel-reinforced sealing washers made of fluorocarbon rubber (FKM) on both sides of the bearing | |
| 2CS5 | Steel plate-reinforced sealing washers made of hydrogenated acrylonitrile-butadiene rubber (H-NBR) on both sides of the bearing | |
| 2F | Standard seals with upstream centrifugal disc on both sides | |
| 2F | Double-row needle bearing | |
| 2HRS | Seal in contact on both sides (lip seal) | |
| 2LS | Polyurethane sealing washers on both sides of the bearing | |
| 2RF | Standard seals with upstream centrifugal disc on both sides | |
| 2RS | Y-bearing, SKF: Standard seals with centrifugal disc on both sides | |
| 2RS | RS contact seal on both sides of the bearing | |
| 2RS1 | Sealing discs made of synthetic rubber with sheet steel reinforcement on both sides of the bearing | |
| 2RS1 | Contact seal made of acrylonitrile-butadiene rubber with sheet steel reinforcement on both bearing sides | |
| 2RS2 | Sheet steel-reinforced contact seal made of fluorocarbon rubber (FKM)on both sides of the bearing | |
| 2RSH | Sheet steel-reinforced contact seal made of acrylonitrile-butadiene rubber (NBR)on both sides of the bearing | |
| 2RSL | Steel plate-reinforced low-friction sealing washer made of acrylonitrile-butadiene rubber (NBR) on both sides of the bearing | |
| 2RSR | Plastic lip seal on both sides, old designation NPP(U) | |
| 2RZ | Sheet steel-reinforced non-contact sealing washer made of acrylonitrile-butadiene rubber (NBR) on both sides of the bearing | |
| 2Z | Cover discs made of sheet steel on both sides of the bearing | |
| 2ZNR | Ring groove in the outer ring surface and associated snap ring and cover discs made of sheet steel on both sides. | |
| 3AS | Grease: Shell / Alvania Grease S3 (-25 to +135 °C) | |
| 5K | Grease: Kyodo Yushi / Multemp SRL (-40 to +150 °C) | |
| 5S | Grease: Shell / Aero Shell Grease 7 (-73 to +149 °C) | |
| A | 30° contact angle | |
| A | No filling grooves (double-row bearings) | |
| A | Improved raceway profile on the outer ring surface (yoke and stud type track rollers only) | |
| A | Modified internal design with the same main dimensions. The meaning of the sign is often linked to the respective bearing series. |
|
| A | Single-row radial ball bearings with a high load rating | |
| A | Single-row angular contact ball bearings, polyamide cage | |
| A | Double-row radial ball bearings, without groove, polyamide cage | |
| A | V-ring seal version A | |
| A1 | Detachable | |
| ABEC 1 | ABEC tolerance class 1, corresponds to DIN 620 (P0) / ISO 492 (class normal) | |
| ABEC 3 | ABEC tolerance class 3, corresponds to DIN 620 (P6) / ISO 492 (class 6) | |
| ABEC 5 | ABEC tolerance class 5, corresponds to DIN 620 (P5) / ISO 492 (class 5) | |
| ABEC 7 | ABEC tolerance class 7, corresponds to DIN 620 (P4) or ISO 492 (class 4) | |
| ABEC 9 | ABEC tolerance class 9, 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 optimised internal design. |
|
| AD | Contact angle 25° | |
| ADA | Widened ring grooves in the outer ring, split inner ring held together by a retaining ring (for bearings of the NNF 50 series) | |
| ADB | ADA + modified internal design | |
| AS | Needle roller bearings with lubrication bores in the outer ring The number after the suffix AS is the number of bores. |
|
| AS2 | Bearing outer ring with 2 lubrication bores in offset planes (housing) | |
| AS2/V | Bearing outer ring with two lubrication bores in two offset planes (instead of in one plane) | |
| B | Modified internal design (double-row deep groove ball bearings) | |
| B | Bearing with spherical outer ring surface (radial insert ball bearing) | |
| B | Modified internal design, nominal pressure angle α = 40° (angular contact ball bearing) | |
| B | 32210 B: Tapered roller bearing with enlarged contact angle (larger than with design 32210) | |
| B | 7210 B: Single-row angular contact ball bearing with a contact angle of 40° | |
| B | Modified brass roller-guided double comb cage | |
| B | Standard design of spherical roller bearings | |
| B | 32° for 2-row angular contact ball bearings | |
| B | 20° for taper roller bearings | |
| B | Bearing with spherical outer ring surface (housing) | |
| BE | Single-row angular contact ball bearing with a contact angle of 40° and optimised internal design. | |
| BEJ | Single-row angular contact ball bearing with a contact angle of 40°, optimised internal design and cage made of sheet steel, ball-guided | |
| BEM | Single-row angular contact ball bearing with a contact angle of 40°, optimised internal design and solid brass cage | |
| BEP | Single-row angular contact ball bearing with a contact angle of 40° and optimised internal design, with an injection-moulded cage made of glass-fibre reinforced polyamide 66 | |
| BEY | Single-row angular contact ball bearing with a contact angle of 40°, optimised internal design and cage made of sheet brass, ball-guided. | |
| BG | Single-row angular contact ball bearings for universal pairing without preload | |
| BRS | Non-contact seal on one side (labyrinth seal) | |
| C | Generation C deep groove ball bearings (FAG only) | |
| C | Contact angle 15° for angular contact ball bearings | |
| C | Enlarged contact angle for tapered roller bearings | |
| C1 | Internal clearance smaller than C2 | |
| C2 | Internal clearance smaller than normal (CN) | |
| C3 | Internal clearance greater than normal (CN) | |
| C4 | Internal clearance greater than C3 | |
| C5 | Internal clearance greater than C4 | |
| CA | Universal bearing for mounting in sets, axial internal clearance smaller thannormal (CB) with O or X arrangement | |
| CA | One-piece double comb cage made of brass, retaining ribs on the inner ring and the inner ring, centred guide ring | |
| CA | Single-row angular contact ball bearings: low axial clearance before fitting | |
| CB | Special axial internal clearance (double-row bearings) | |
| CB | Universal bearing for mounting in sets, normal axial clearance forO or X arrangement | |
| CB | Single-row angular contact ball bearings: normal axial clearance before fitting | |
| CC | Universal bearing for mounting in sets, axial internal clearance greater thannormal (CB) with O or X arrangement | |
| CC | Closed stainless steel closure for housing bearing | |
| CC | Single-row angular contact ball bearings: greater axial clearance before fitting | |
| CC(J) | Two window cages made of sheet steel, inner ring without ribs and guide ring centred on it | |
| CD | Single-row angular contact ball bearing with a contact angle of 15° and optimised internal design | |
| CJ | Two window cages made of sheet steel, inner ring without ribs and guide ring centred on it | |
| CL7C | Special friction characteristics for easier adjustment and higher running accuracy | |
| CLN | Tapered roller bearing with tolerances according to ISO tolerance class 6X | |
| CN | The above code letters are also used with the internal clearance classes C2, C3, C4 and C5, e.g., C2H. | |
| CS | Sheet steel-reinforced sealing washer made of acrylonitrile-butadiene rubber (NBR) on one side of the bearing | |
| CS2 | Sheet steel-reinforced sealing washer made of fluorocarbon rubber (FKM) on one side of the bearing | |
| CS5 | Sheet steel-reinforced contact seal made of hydrogenated acrylonitrile-butadiene rubber (HNBR)on one side of the bearing | |
| CS5 | Steel plate-reinforced sealing washer made of hydrogenated acrylonitrile-butadiene rubber (H-NBR) on one side of the bearing | |
| D | Split inner ring | |
| D | Modified internal design | |
| D | Enlarged contact angle for tapered roller bearings | |
| D | Lubrication holes (without grooves) | |
| D | High-precision angular contact ball bearing with lubrication | |
| D | Spheroidal cast iron (housing) | |
| D1 | Groove and lubrication holes in the outer ring | |
| D2 | D1 + anti-rotation ball on outside diameter for bearing inserts | |
| D8 | Deep groove ball bearings with open design, also available with cover discs or seals as standard, but without required recesses in the outer ring. | |
| DA | Widened ring grooves in the outer ring, split inner ring held together by a retaining ring | |
| DB | Two deep groove ball bearings matched for installation in O arrangement | |
| DBA | A: Small preload | |
| DBB | B: Medium preload | |
| DBC | C: High preload | |
| DBGA | GA: Small preload | |
| DBGB | GB: Medium preload | |
| DD | Sealing washers on both sides with lip seal | |
| 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 mounting in pairs in X arrangement. The additional designations for the axial internal clearance and preload are described at DB. | |
| DG | Two single-row angular contact ball bearings for universal installation in pairs in O, X or tandem arrangement. The additional designations for the axial internal clearance and preload are described at DB. | |
| DT | Two-single row deep groove ball bearings, angular contact ball bearings or tapered roller bearings, matched for installation in pairs in 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. | |
| E | Deviating internal design with the same main dimensions. The meaning of the character is often linked to the respective bearing series but usually designates a rolling bearing set with a higher load-carrying capacity. | |
| E | Reinforced roller set | |
| E | Increased load rating for cylindrical roller bearings and spherical roller bearings | |
| EA | Spherical roller bearings with increased load rating and with a sheet steel cage | |
| EC | Optimised internal design; more and/or larger rollers as well as modified roller/rib contact ratios | |
| EC | Optimised internal design; more or larger rollers and modified roller/rib contact | |
| EC | Sealing for SNC bearings | |
| ECA | Spherical roller bearings according to CA design, but with optimised rolling bearing set for higher load carrying capacity | |
| ECAC | Spherical roller bearings according to CAC design, but with optimised rolling bearing set for higher load carrying capacity | |
| ECJ | Optimised internal design, with sheet steel cage | |
| ECM | Optimised internal design, with brass cage, roller-guided | |
| ECP | Optimised internal design, with plastic cage (standard version) | |
| EE | Two-sided seal | |
| EGS | Inner ring with twist-free ground raceway | |
| F | Solid steel cage, ball-guided | |
| F | One-piece double comb cage made of steel, inner ring guided | |
| F | Solid cage made of steel or special cast iron, guided by rolling elements; different cage designs or cage materials are identified by appended digits after the suffix F, e.g., F1. | |
| F | Rolling element-guided double comb cage made of steel | |
| F1 | Solid steel cage | |
| F600 | High-temperature bearings for tunnel kiln cars | |
| F604 | High-temperature bearings for lubricated and protected tunnel kiln cars | |
| F800 | Spherical roller bearings for high load capacity for applications with vibratory gearboxes | |
| FA | Steel window cage, outer ring-guided | |
| FA101 | High- and low-temperature versions -40 °C to +180 °C | |
| FA106 | Bearing especially noise-tested | |
| FA107 | Bearing with lubrication bores on the mounting side | |
| FA125 | With Corrotect coating, corrosion-resistant | |
| FA164 | High-temperature version from +150 °C to +250 °C | |
| FD | Food-grade grease | |
| FP | Steel window cage; rolling element-guided | |
| FS | Felt strip seal for SNC bearing | |
| FT150 | Sealing washers on both sides, high-temperature resistant (-150 degrees) | |
| FT150ZZ | Protected bearing for high temperatures up to +150 °C | |
| G | Lubrication groove in the outer ring surface on the opposite side of the mounting possibility | |
| G | Universal bearing for mounting in sets, special axial clearance forO or X arrangement | |
| G | Outer ring for tapered roller bearings only | |
| G | Universal angular contact ball bearings; two bearings in O or X arrangement have a fixed axial clearance before installation. | |
| 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 taper roller bearings | |
| G.. | A three-letter number after the grease identifier indicates that the fill level deviates from the standard: The numbers 1, 2 and 3 indicate a smaller filling level than the standard quantity, 4 to 9 a larger filling level | |
| G1 | Solid brass cage | |
| G2 | Relubrication system for bearing inserts | |
| GA | Universal bearing for mounting in sets, small preload, forO or X arrangement | |
| GB | Universal bearing for mounting in sets, medium preload, forO or X arrangement | |
| GB | Single-row angular contact ball bearings for any paired mounting; two bearings in O or X arrangement have a medium preload before mounting. | |
| GC | Universal bearing for mounting in sets, high preload, forO or X arrangement | |
| GC | Single-row angular contact ball bearings for any paired installation; | |
| GC | Two bearings in O or X arrangement have a high preload before installation. | |
| GD2 | 2 universal bearings in a single housing | |
| GE | E: Grease for extreme pressure (EP grease) | |
| GEM9 | Free space in the bearing filled to 70 to 100 % with the highly viscous SKF grease LGHB 2 | |
| 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 | Small bearing preload | |
| GM | Medium bearing preload | |
| GM | M: Grease for medium temperatures, e.g., from -30 to +110 °C | |
| GN | Normal bearing preload | |
| GR | Lubrication groove in the outer ring surface on the side of the mounting possibility | |
| GS.. | Housing washer of an axial cylindrical roller bearing. The inner diameter is slightly wider 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 | Lubricating grease with polyurea thickener according to NLGI consistency class 2 for -40 to +150 °C, standard filling quantity | |
| H | Clamping sleeves with an oil injection device (e.g., AH24T48H) | |
| H | Snap cage made of sheet steel, pressed and hardened. | |
| 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 above 70 % | |
| HTxxF1 | F1: Filling level lower than standard | |
| HTxxF7 | F7: Filling level greater than standard | |
| HTxxF9 | F9: Filling level greater than 70 % | |
| HV | Bearing parts made of stainless steel + food-grade grease | |
| HV | Bearings or bearing parts made of stainless, hardenable steel. The suffixes HM are followed by one of the digits explained under HA for better identification. | |
| HV | Y-bearing, SKF: Bearing parts are made of stainless steel. The bearing is filled with a food-grade grease. | |
| HVZZ | Protected bearings for high speeds up to 700,000 N.Dm | |
| IS | Inner ring with lubrication holes; added numbers indicate the number of holes | |
| IS | Needle roller bearings with lubrication bore in the inner ring; added digits after the suffix IS indicate the number of bores. | |
| ISR | Needle roller bearings with circumferential groove and lubrication bore in the inner ring; added digits after the suffix ISR indicate the number of bores. | |
| J | Sheet steel cage, ball-guided | |
| J | Two window cages made of sheet steel, guided on the inner ring-centred guide ring | |
| J | Cage made of sheet steel, pressed, rolling element-guided, unhardened; this is only indicated if the sheet steel cage is not the standard cage for the bearing type. Example: Cylindrical roller bearing. | |
| J2 | SKF tapered roller bearing: Sheet steel cage in design variant 2 | |
| J2 DF | SKF tapered roller bearing set: two ready-to-fit, single-row bearings in X arrangement. | |
| JA | Sheet steel window cage, outer ring-guided | |
| JA | Two sheet steel window cages centred in a guide ring guided on the outer ring raceway | |
| JB | Sheet steel window cage, inner ring-guided | |
| JH | Sheet steel snap cage; rolling element-guided | |
| JHA | Cage made of sheet steel, pressed and hardened, outer ring-guided | |
| JP | Steel sheet cage | |
| JP | Sheet steel window cage; rolling element-guided | |
| JP1 | Sheet steel window cage; rolling element-guided | |
| JPA | Sheet steel window cage; guide on outer ring (support ring) | |
| JPB | Sheet steel window cage; guide on inner ring | |
| JR | Cage made of two flat sheet steel discs, riveted, unhardened | |
| JW | Cage made of sheet steel, unhardened and welded | |
| K | Tapered bore, taper 1:12 | |
| K | Bearing has inner ring with a tapered bore. Taper 1:12. Not suitable for mounting on a cylindrical shaft! The bearing is mounted with an adapter sleeve (e.g., order H adapter sleeves) on a cylindrical shaft or without an adapter sleeve on a tapered shaft. | |
| K30 | Tapered bore, taper 1:30 | |
| KLL | Labyrinth seal (L-seal) on both sides (housing) | |
| KRR | Lip seal (R-seal) on both sides (housing) | |
| KTN9 | K + TN9 | |
| KTT | 3-lip seal (T-seal) on both sides (housing) | |
| L | Rib washer for NUP | |
| L | Solid cage made of light metal; the different versions or materials are indicated by a number, for example, L1 | |
| -L | NUP without rib washer | |
| 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 a special surface coating | |
| L5 | Flange bearing with opening for grease nipple and oil drain hole | |
| L5B | Rolling elements with a special surface coating | |
| L5DA | No-wear bearings with coated rolling elements | |
| L627 | Grease: Exxon / Polyrex EM / Polyree (-25 to +170 °C) | |
| L7DA | No-wear 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 bearing | |
| 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 fluoro-elastomer seal (-30 to +200 °C) | |
| LBA2 | Non-contact silicone seal (-100 to +200 °C) | |
| LFS | LFS (Low Friction Seal) type seals on both sides of the bearing. Seal type: axial sealing lip, radial sealing lip in a groove, non-contact on bearing inner ring | |
| LH | Low -torque contact nitrile seal (-25 to +120 °C) | |
| LHA | Low-torque contact polyacrylic seal (-10 to +150 °C) | |
| LHA1 | Fluorinated low-torque contact elastomer seal (-30 to +200 °C) | |
| LHA2 | Low-torque contact silicone seal (-100 to +200 °C) | |
| LHA4 | Low-torque high nitrile contact seal (-20 to +130 °C) | |
| LHAX12 | Low-torque high polyacrylic contact seal (-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 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) | |
| LLH | Contact nitrile rubber seal on both sides, low friction (-25 to +120 °C) | |
| LLJ | Bearing with double lip seal and low torque | |
| LLS | Bearing with triple lip seal with high torque | |
| 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) | |
| LO | Bearings without preservatives but oiled with a low-viscosity oil; the oil used is indicated by the numbers after the letter combination LO, for example, LO10 | |
| LP | Solid window cage made of light metal, with punched or broached pockets and inner or outer ring guide | |
| LPA | Solid light metal window cage; guide on outer ring (housing) | |
| LPB | Solid light metal window cage; guide on inner ring (shaft) | |
| LS | Contact seal made of acrylonitrile-butadiene rubber (NBR)) or polyurethane (AU) with or without sheet steel reinforcement on one side of the bearing | |
| 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 discs for low temperatures down to -60 °C | |
| LU | Contact nitrile seal (-20 to +120 °C) | |
| LUA | Contact polyacrylic seal (-15 to +150 °C) | |
| M | Solid brass cage guided by rolling elements | |
| M1 | Solid brass cage guided by rolling elements (riveted) | |
| M1A | Solid brass cage, guide on outer ring (riveted) | |
| M1B | Solid brass cage, guide on inner ring (riveted) | |
| MA | One-piece double comb cage made of brass, outer ring-guided | |
| MA | Solid brass cage, guide on outer ring (housing washer, housing) | |
| MAS | Solid brass cage, guide on outer ring with lubrication grooves | |
| MB | Solid brass cage, guided on inner ring rib | |
| MB | Solid brass cage, guide on inner ring (shaft washer, shaft) | |
| MB1 | Brass window cage, inner ring-guided | |
| MBS | Solid brass cage, guide on inner ring with lubrication grooves | |
| MH | Brass window cage, inner ring-guided | |
| ML | Form-turned window cage made of brass, inner or outer ring-guided depending on bearing design | |
| ML | One-piece solid window cage made of brass, with milled, punched or broached pockets and inner or outer ring guide | |
| MO | Bearings without preservatives but oiled with a medium-viscosity oil; the oil used is indicated by the numbers after the letter combination MO, for example, MO10. | |
| MP | Solid brass cage | |
| MP | Solid brass window cage guided by rolling elements | |
| MP1 | Solid brass window cage guided by rolling elements | |
| MPA | Solid brass window cage, guide on outer ring (housing) | |
| MPB | Solid brass window cage, guide on inner ring (shaft) | |
| MR | Form-turned brass window cage, outer ring-guided | |
| MR | Solid, one-piece window cage made of brass with rolling element guide | |
| 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 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 | Ring groove in the outer ring surface | |
| N | Groove for ring lock on outer ring | |
| N | Steel bearing, e.g., P315N | |
| N | Outer ring + rollers (+cage) for cylindrical roller bearings | |
| N | Cast iron housing with groove for protective caps | |
| N1 | A retaining groove on the outer ring; for fixing the bearing in the circumferential direction | |
| N1 | A retaining groove in one end face of the outer ring | |
| N1 | A retaining groove in one end face of the outer ring or housing washer | |
| N1 | Bearing made of cast iron GS. E.g., P315N1 | |
| N2 | Two retaining grooves offset by 180° in one end face of the outer ring | |
| N2 | Two retaining grooves offset by 180° in one end face of the outer ring or housing washer | |
| NPP | Lip seal (P-seal) on both sides (housing) | |
| NR | Groove and snap ring for radial insert ball bearing with cylindrical outer ring | |
| NR | Ring groove in the outer ring surface and associated snap ring | |
| NRS | Groove and ring lock on the opposite side (different from standard) | |
| P | Glass-fibre reinforced cage made of PA 66, ball-guided | |
| P | Injection-moulded cage made of glass fibre reinforced polyamide 66 with rolling element guide | |
| P | Sealing ring on one side of the bearing | |
| P2 | Dimensional and running accuracy according to ISO tolerance class P2 | |
| P3 | Dimensional and running accuracy according to ISO tolerance class P3 | |
| P4 | Dimensional and running accuracy according to ISO tolerance class P4 | |
| 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 deviation | |
| P43 | P4 + C3 | |
| P4A | Dimensional and running accuracy according to ISO tolerance class 2 or ABMA tolerance class ABEC 9 | |
| P5 | Bearings in tolerance class 5 | |
| 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 internal clearance | |
| P63 | P6 + C3 internal clearance | |
| P63E | Precision P6 and air C3 / DIN standard electric motors | |
| P64 | P6 + C4 internal clearance | |
| PA | Window cage made of glass fibre reinforced polyamide 66, outer ring-guided | |
| PH | Injection-moulded cage made of glass-fibre reinforced polyetheretherketone (PEEK), with rolling element guide | |
| PHA | Injection-moulded cage made of fibre-reinforced polyetheretherketone (PEEK), outer ring guide | |
| PHAS | Injection-moulded window cage made of glass-fibre 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 | Contact seals made of acrylonitrile butadiene on both sides of the yoke type track rollers and track rollers | |
| PP | Plastic axial sliding disc with a moulded-on sealing lip on both sides of the yoke type track rollers forms a three-stage seal | |
| PPA | Axial sliding discs made of polyamide 66 on both sides | |
| PPA | Axial sliding rings made of polyamide 66 on both sides of the track, yoke type track rollers and improved profile of the raceway surface | |
| PPSKA | Axial sliding discs made of polyamide 66 on both sides. Hexagon socket in the collar side, cannot be relubricated | |
| PPXA | Axial sliding discs made of polyamide 66 on both sides. With cylindricalrunning surface on the outer ring surface | |
| Q | Optimised contact geometry and surface condition | |
| Q | Optimised inner 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 X or tandem arrangement, i.e., two tandem bearing pairs in 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 tandem arrangement on one side on the pair in an O arrangement, i.e., 3 bearings in tandem arrangement and O arrangement with a fourth bearing | |
| QD | Filling with grease: from 5.0 to 10.0 % | |
| QE | Filling with grease: 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 with /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; as /QBT, but with X arrangement on one side, i.e., three bearings in tandem arrangement and X arrangement with a fourth bearing | |
| QR | Set of four single-row deep groove ball bearings or roller bearings, matched for even distribution of radial load | |
| QR | Filling with grease: from 35.0 to 45.0 % | |
| QS | Filling with grease: from 40.0 to 50.0 % | |
| QT | Set of four matched deep groove ball bearings or angular contact ball bearings in tandem arrangement | |
| R | Outer ring flange | |
| R | Yoke type track rollers: crowned outer ring surface (standard). For cylindrical surface: see suffix X | |
| RF | Rubber centrifugal disc (pressed sheet steel centrifugal disk with vulcanised sealing lip) on one side of the Y-bearing | |
| RR | Rust-protected due to special Corrotect® coating | |
| 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 | |
| RS1Z | Sheet steel reinforced contact seal made of acrylonitrile-butadiene rubber (NBR) on one side and a cover disc on the other side of the bearing | |
| RS2 | Sheet steel reinforced contact seal made of fluorocarbon rubber (FKM) on one side of the bearing | |
| RSH | Sheet steel reinforced contact seal made of acrylonitrile-butadiene rubber (NBR) on one side of the bearing | |
| RSL | Sheet steel-reinforced, low-friction contact seal made of acrylonitrile-butadiene rubber (NBR) on one bearing side | |
| RSR | Lip seal made of plastic on one bearing side, old designation NPP(U) | |
| RZ | Sheet steel-reinforced, low-friction seal made of acrylonitrile-butadiene rubber (NBR) on one bearing side | |
| S | Round outer diameter | |
| S | Needle roller bearing (INA): Lubrication bore present in the outer ring (or sheet metal sleeve) | |
| S | Spherical roller bearing: Lubrication bores in the circumferential outer ring groove. See also W33 for FAG, NKE bearings | |
| S | Crowned outer surface | |
| S0 | Bearing rings, heat-treated, up to +150 °C | |
| S1 | Bearing rings dimensionally stabilised for operating temperatures up to 200 °C | |
| S2 | Bearing rings dimensionally stabilised up to operating temperatures of ≤ 250 °C | |
| S3 | Bearing rings heat-treated, up to +300 °C | |
| S6.. | Deep groove ball bearing type 6.. made of stainless steel | |
| SK | Radial insert ball bearing: Bore with hexagon socket | |
| SP | Special accuracy class for spindle bearings of machine tools, dimensional accuracy approx. ISO tolerance class 4, running accuracy approx. according to ISO class 4. | |
| SPC2 | as SP, but with reduced internal clearance C2 | |
| SPCN | as SP, but with normal internal clearance CN | |
| SQ.. | General: Special quality regulation (factory standard). The digits after SQ indicate the regulation. | |
| ST | Modified internal design (low torque) | |
| SV | V-ring seal complete for SNC bearing | |
| T | Window cage made of fabric-reinforced phenolic resin, rolling element-guided | |
| T | Threaded bore 1/4-28 UNF for grease nipple AH 1/4-28 SAE-LT on one side of the upper housing part for lubrication of the seal (housing) | |
| T04 | Bearing inserts for operating temperatures down to -40° C | |
| 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 tapered roller bearings for oscillating loads. Applications see also VA405 (SKF) | |
| TA | Taconite seal for SNC bearing | |
| TA | Solid phenolic resin cage, guide on outer ring | |
| TB | Solid phenolic resin cage, guide on 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 tandem arrangement | |
| TD | Threaded bore 1/4-28 UNF for grease nipple AH 1/4-28 SAE-LT on both sides of the upper housing part for lubrication of both seals. (housing) | |
| TFT | Set of three matched single-row deep groove or angular contact ball bearings; two bearings with X arrangement, the third bearing in tandem arrangement | |
| TH | Snap cage made of fabric-reinforced phenolic resin, rolling element-guided | |
| THA | Snap cage made of fabric-reinforced phenolic resin, guide on outer ring | |
| THB | Phenolic resin snap cage, guide on inner ring | |
| TN | Cage made of polyamide 66, ball-guided | |
| TN | One-piece or two-piece cage made of polyamide 66, rolling element-guided | |
| TN9 | Glass-fibre reinforced cage made of polyamide 66, ball-guided | |
| TN9 | One-piece or two-piece cage made of glass-fibre reinforced polyamide 66, rolling element-guided | |
| TNH | Injection-moulded snap cage made of fibre-reinforced polyetheretherketone (PEEK), rolling element-guided | |
| TNHA | Injection-moulded cage made of fibre-reinforced polyetheretherketone (PEEK), outer ring-guided | |
| TNP | Polyamide window cage; rolling element-guided | |
| TPA | Phenolic resin window cage, guide on outer ring | |
| TPB | Phenolic resin window cage, guide on 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 | Solid polyamide cage guided by rolling elements | |
| TVA | Solid polyamide cage, guide on outer ring | |
| TVB | Solid polyamide cage, guide on inner ring | |
| TVH | Polyamide snap cage; rolling element-guided | |
| TVH, TVP | Solid cage made of glass-fibre reinforced polyamide PA66 | |
| TVHB | Polyamide snap cage; guide on 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; guide on inner ring | |
| TVPB1 | Polyamide window cage; guide on inner ring | |
| U | Without eccentric ring | |
| U | Suffix “U” with a one-digit number identifies a tapered roller bearing with taper or outer ring and reduced width tolerance. | |
| U | Reinforced version for tapered roller bearings | |
| UA | Spherical roller bearings with high load capacity for applications with vibratory gearboxes | |
| UH | High preload in the assembled state | |
| UL | Small preload in assembled state. Preload is the force resulting from negative operating clearance or negative bearing clearance when mounted. | |
| UM | Medium preload in the assembled state | |
| UP | Special accuracy class for spindle bearings of machine tools, dimensional accuracy approx. ISO tolerance class 4, running accuracy approx. according to ISO tolerance class 4. | |
| UP | Ultra-high precision | |
| V | Full complement | |
| V | Suffix “V”, combined with a second letter, identifies a design group; followed by a three- or four-digit number, it designates designs 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 for spherical roller bearings | |
| V | Housing with a grease outlet opening in the lower part of the housing (housing) | |
| VA | Rust-protected design (housing) | |
| VA | Application-oriented versions | |
| VA201 | Bearings for extreme temperatures up to +250 °C with a sheet steel cage | |
| VA208 | Bearings for extreme temperatures up to +350 °C with a segment cage made of graphite | |
| VA216 | Bearings for extreme temperatures | |
| VA228 | Bearings for extreme temperatures up to +350 °C with a crown cage made of graphite | |
| VA301 | Bearings for electrical machines in electric rail vehicles | |
| 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 wheelset bearing arrangements according to EN 12080:1998 | |
| VA350 | Bearings for railway vehicle wheelset bearings | |
| VA380 | Wheelset bearings for railway vehicles according to EN 12080:1998, Class 1 | |
| VA405 | Bearings for vibratory machinery with surface-hardened sheet steel window cages | |
| VA406 | As VA405, but additionally with PTFE-coated bore | |
| VA406 | Bearings for vibratory machinery with special polytetrafluoroethylene coating of the bore (PTFE coating) | |
| VA701 | Bearings for paper machines | |
| VA820 | Bearings for railway vehicle wheelset bearing arrangements according to EN 12080:1998 | |
| VB | VB: Deviations of the outer dimensions | |
| VC025 | Bearings with particularly wear-resistant, heat-treated parts for heavily contaminated environments | |
| VE | VE: Deviations of the 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 support threads on one end face (for hoist) | |
| VE495 | Galvanised bearing rings and centrifugal discs made of stainless steel + food-grade grease | |
| VE552 | Outer ring with three equally spaced support threads on one end face (for hoist) | |
| VE553 | Outer ring with three equally spaced support threads on both end faces (for hoist) | |
| VE632 | Housing washer 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-layer hardened sheet steel window cage | |
| VGS | Inner ring raceway for cylindrical roller and needle roller bearings, pre-ground only; for cylindrical roller bearings, replaced by the symbol /VU001 | |
| VH | Full complement, self-retaining roller set | |
| VH | Full complement cylindrical roller bearing with self-retaining roller bearing set | |
| VIT | Rotary shaft seals based on fluorine rubber (FPM/FKM), more temperature-resistant than standard material NBR (NBR has suffix BA) | |
| VL0241 | Aluminium oxide coating on the outer surface of the outer ring with dielectric strength up to 1,000 V DC | |
| VL0271 | Aluminium oxide coating on the outer surface of the inner ring with dielectric strength up to 1,000 V DC | |
| VL065 | Inner ring with galvanised bore and side surfaces | |
| VP076 | Cover discs made of sheet steel on both sides of the bearing | |
| VP076 | Pressed sheet steel covers on each bearing side | |
| VQ | VQ: Special dimensional, form or running accuracy | |
| VQ015 | Inner ring with crowned raceway for higher, maximum permissible misalignments | |
| VQ424 | Running accuracy better than C08 | |
| VS | VS: Bearing clearance and preload | |
| VS1 | Special tolerance for screen bearings | |
| VT | VT: Lubrication | |
| VT143 | Free space in the bearing filled to 25 to 45 % with the SKF high-pressure grease LGEP 2 | |
| VT143 | High-pressure grease with lithium thickener according to NLGI consistency class 2 for -20 to +110 °C (normal filling volume) | |
| VT357 | Lithium complex soap grease | |
| VT378 | Food-grade grease with aluminium 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 | No relubrication possibility | |
| W | Without circumferential groove and lubrication bores in outer ring | |
| W20 | Three lubrication bores in the outer ring | |
| W203B | Bearing made of “stainless steel”. | |
| W26 | Six lubrication bores in the inner ring | |
| W3 | Bearing with tensioning screw, nozzle needle type | |
| W33 | Circumferential groove and three lubrication bores in the outer ring | |
| W33X | Circumferential groove and six lubrication bores in the outer ring | |
| W5 | Bearing with tensioning screw, nozzle needle type, differs from W3 | |
| W513 | Six lubrication bores in the inner ring and circumferential groove and three lubrication bores in the outer ring | |
| W518 | Six lubrication bores in the inner ring and three lubrication bores in the outer ring | |
| W6 | Bearing with tensioning screw, nozzle needle type, differs from W5 | |
| W64 | Solid oil lubricant filling | |
| W77 | Added W33 lubrication bores | |
| WS.. | 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) | |
| X | Main dimensions changed according to ISO specifications | |
| X | Cylindrical running surface on the outer ring surface (yoke and stud type track rollers only) | |
| X1 | 1. Main dimensions changed according to ISO. | |
| X2 | 2. Cylindrical raceway surface (track rollers, yoke type track rollers and track rollers) | |
| XL | Bearing design in X-life quality (FAG only) | |
| Y | Sheet brass cage, ball-guided | |
| Y | a) Cylindrical outer ring surface of yoke type and stud type track rollers, if normal variant with crowned outer ring | |
| Y | Cage made of sheet brass, guided by rolling elements | |
| YPB | Sheet brass window cage; guide on inner ring | |
| Z | Cover disc made of sheet steel on one side | |
| Z | Flange bearing with rubber seal type Z | |
| Z1 | Combined needle bearing with cover | |
| Z1 | Stainless steel protective cover | |
| Z2 | Cover disc made of sheet steel on one side of the bearing | |
| Z2 | Flange bearing with felt strip seal | |
| Z2 | Flange bearing with felt strip seal | |
| ZA | Removable protective cover | |
| ZNR | Ring groove in the outer ring surface and associated snap ring and one cover disc made of sheet steel on the opposite side. | |
| ZW | Double-row needle roller and cage assembly | |
| ZW | Double-row needle bearing | |
| ZZ | Two-sided protective cover | |
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Bearings
Bearings
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Housings/housing Units
Housings/housing Units
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Linear Technology
Linear Technology
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V-Belts
V-Belts
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Seals
Seals
