Bearing Brand Model Comparison
Following is a SKF bearings code, more bearings brand code, please search our blog
| SKF single row deep groove ball bearings Code | |
| CN | Normal radial clearance; normally only used together with an additional letter that identifies a reduced or displaced clearance range |
| H: Reduced clearance range corresponding to the upper half of the actual clearance range | |
| L: Reduced clearance range corresponding to the lower half of the actual clearance range | |
| K: Displaced clearing range comprising to the upper half the actual clearance range plus the lower half of the next lager clearance range | |
| The above letters are also used together with the clearance classes C2, C3, C4 and C5, e.g. C2H | |
| C2 | Radial internal clearance smaller than Normal |
| C3 | Radial internal clearance greater than Normal |
| C4 | Radial internal clearance greater than C3 |
| C5 | Radial internal clearance greater than C4 |
| DB | Two single row deep groove ball bearings matched for paired mounting in a back-to-back arrangement |
| DF | Two single row deep groove ball bearings matched for paired mounting in a face-to-face arrangement |
| DT | Two single row deep groove ball bearings matched for paired mounting in a tandem arrangement |
| E | Reinforced ball set |
| GJN | Grease with polyurea thickener of consistency 2 to the NLGI Scale for temperature range –30 to +150 °C (normal filling grade) |
| HT | Grease with polyurea thickener of consistency 2 to the NLGI Scale for temperature range –40 to +150 °C (normal fill grade) |
| J | Pressed steel cage |
| LHT23 | Grease with lithium thickener of consistency 2 to the NLGI Scale for temperature range –50 to +140 °C (normal filling grade) |
| LT | Grease with lithium thickener of consistency 2 to the NLGI Scale for temperature range –55 to +110 °C (normal filling grade) |
| LT10 | Grease with lithium thickener of consistency 2 to the NLGI Scale for temperature range –50 to +90 °C (normal filling grade) |
| M | Machined brass cage, ball centred; different designs and material grades are identified by a figure following the M, e.g. M2 |
| MA | Machined brass cage, outer ring centred |
| MAS | As MA but with lubrication grooves in the guiding surfaces |
| MB | Machined brass cage, inner ring centred |
| MBS | As MB but with lubrication grooves in the guiding surfaces |
| MT33 | Grease with lithium thickener of consistency 3 to the NLGI Scale for temperature range –30 to +120 °C (normal filling grade) |
| MT47 | Grease with lithium thickener of consistency 2 to the NLGI Scale for temperature range –30 to +110 °C (normal filling grade) |
| N | Snap ring groove in outer ring |
| NR | Snap ring groove in the outer ring, with appropriate snap ring |
| N1 | One locating slot (notch) in one outer ring sideface |
| P5 | Dimensional and running accuracy to ISO tolerance class 5 |
| P6 | Dimensional and running accuracy to ISO tolerance class 6 |
| P52 | P5 + C2 |
| P62 | P6 + C2 |
| P63 | P6 + C3 |
| RS1 | Sheet steel reinforced contact seal of acrylonitrile-butadiene rubber (NBR) on one side of the bearing |
| 2RS1 | RS1 contact seal on both sides of the bearing |
| RSH | Sheet steel reinforced contact seal 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 of acrylonitrile-butadiene rubber (NBR) on one side of the bearing |
| 2RSL | RSL low friction contact seal on both sides of the bearing |
| RZ | Sheet steel reinforced low friction seal of acrylonitrile-butadiene rubber (NBR) on one side of the bearing |
| 2RZ | RZ low friction seal on both sides of the bearing |
| TH | Snap-type cage of fabric reinforced phenolic resin, ball centred |
| TN | Injection moulded snap-type cage of polyamide, ball centred |
| TNH | Injection moulded snap-type cage of glass fibre reinforced polyetheretherketone (PEEK), ball centred |
| TN9 | Injection moulded snap-type cage of glass fibre reinforced polyamide 66, ball centred |
| VL0241 | Aluminium oxide coated outside surface of the outer ring for electrical resistance up to 1 000 V DC |
| VL2071 | Aluminium oxide coated outside surface of the inner ring for electrical resistance up to 1 000 V DC |
| WT | Grease with polyurea thickener of consistency 2-3 to the NLGI Scale for temperature range –40 to +160 °C (normal filling grade) |
| Y | Pressed brass cage, ball centred |
| Z | Shield of pressed sheet steel on one side of the bearing |
| 2Z | Z shield on both sides of the bearing |
| ZNR | Shield of pressed sheet steel on one side of the bearing and snap ring groove in the outer ring with snap ring on the opposite side of the shield |
| 2ZNR | Z shield on both sides of the bearing and snap ring groove in the outer ring with snap ring |
| SKF four-point contact ball bearings Code | |
| B20 | Reduced width tolerance |
| C2 | Axial internal clearance smaller than Normal |
| C2H | Axial internal clearance in upper half of C2 range |
| C2L | Axial internal clearance in lower half of C2 range |
| C3 | Axial internal clearance greater than Normal |
| C4 | Axial internal clearance greater than C3 |
| CNL | Axial internal clearance in lower half of Normal range |
| FA | Machined window-type steel cage, outer ring centred |
| MA | Machined window-type brass cage, outer ring centred |
| N2 | Two locating slots (notches), 180° apart, in the large outer ring side face |
| PHAS | Injection moulded window-type cage of glass fibre reinforced polyetheretherketone (PEEK), with lubrication grooves in the guiding surfaces, outer ring centred |
| P6 | Dimensional and running accuracy to ISO tolerance class 6 |
| P6CNL | P6 + CNL |
| P63 | P6 + C3 |
| P64 | P6 + C4 |
| S1 | Bearing rings dimensionally stabilized for use at operating temperatures up to +200 °C |
| 344524 | C2H + CNL |
| SKF Double row angular contact ball bearings Code | |
| A | No filling slots |
| CB | Controlled axial internal clearance |
| C2 | Axial internal clearance smaller than Normal |
| C3 | Axial internal clearance greater than Normal |
| D | Two-piece inner ring |
| E | Max type bearing, with filling slot |
| HT51 | High temperature grease for operating temperature s in the range –30 to +140 °C |
| J1 | Pressed snap-type steel cage, ball centred |
| M | Machined window-type brass cage, ball centred |
| MA | Pronged machined brass cage, outer ring centred |
| MT33 | Grease with lithium thickener of consistency 3 to the NLGI Scale for a temperature range –30 to +120 °C (normal fill grade) |
| N | Snap ring groove in the outer ring |
| NR | Snap ring groove in the outer ring with snap ring |
| P5 | Dimensional and running accuracy in accordance with ISO tolerance class 5 |
| P6 | Dimensional and running accuracy in accordance with ISO tolerance class 6 |
| P62 | P6 + C2 |
| P63 | P6 + C3 |
| TN9 | Injection moulded snap-type cage of glass fibre reinforced polyamide 66, ball centred |
| 2RS1 | Sheet steel reinforced contact seal of acrylonitrile-butadiene rubber (NBR) on both sides of the bearing |
| W64 | Solid Oil filling |
| 2Z | Shield of pressed sheet steel on both sides of the bearing |
| SKF single row angular contact ball bearings Code | |
| A | 30° contact angle |
| AC | 25° contact angle |
| B | 40° contact angle |
| CA | Bearing for universal matching. Two bearings arranged back-to-back or face-to-face will have an axial internal clearance smaller than Normal (CB) before mounting |
| CB | Bearing for universal matching. Two bearings arranged back-to-back or face-to-face will have a Normal axial internal clearance before mounting |
| CC | Bearing for universal matching. Two bearings arranged back-to-back or face-to-face will have an axial internal clearance greater than Normal (CB) before mounting |
| DB | Two bearings matched back-to-back |
| DF | Two bearings matched face-to-face |
| DT | Two bearings matched in tandem |
| E | Optimized internal design |
| F | Machined window-type steel cage, ball centred |
| GA | Bearing for universal matching. Two bearings arranged back-to-back or face-to-face will have a light preload before mounting |
| GB | Bearing for universal matching. Two bearings arranged back-to-back or face-to-face will have a moderate preload before mounting |
| GC | Bearing for universal matching. Two bearings arranged back-to-back or face-to-face will have a heavy preload before mounting |
| J | Pressed window-type steel cage, ball centred |
| M | Machined window-type brass cage, ball centred, different designs are identified by a figure, e.g. M1 |
| MB | Machined brass cage, inner ring centred |
| N1 | One locating slot (notch) in the large outer ring side face |
| N2 | Two locating slots (notches), 180° apart, in the large outer ring side face |
| P | Injection moulded window-type cage of glass fibre reinforced polyamide 66, ball centred |
| PH | Injection moulded window-type cage of glass fibre reinforced polyetheretherketone (PEEK), ball centred |
| P5 | Dimensional and running accuracy to ISO tolerance class 5 |
| P6 | Dimensional and running accuracy to ISO tolerance class 6 |
| W64 | Solid Oil filling |
| Y | Pressed window-type brass cage, ball centred |
| SKF single row tapered roller bearings Code | |
| B | Steeper contact angle than standard design |
| CLN | Reduced tolerances for ring widths and total (abutment) width; corresponds to ISO tolerance class 6X |
| CL0 | Accuracy to ABMA tolerance class 0 for inch bearings |
| CL3 | Accuracy to ABMA tolerance class 3 for inch bearings |
| CL7A | High-performance design for pinion bearing arrangements (superseded by CL7C) |
| CL7C | High-performance design for pinion bearing arrangements |
| HA1 | Case-hardened inner and outer rings |
| HA3 | Case-hardened inner ring |
| HN1 | Inner and outer ring with special surface heat treatment |
| HN3 | Inner ring with special surface heat treatment |
| J | Pressed window-type steel cage, roller centred. A figure following the J indicates a different cage design |
| P6 | Dimensional and running accuracy to old ISO tolerance class 6, better than Normal |
| Q | Optimized contact geometry and surface finish |
| R | Flanged outer ring |
| TN9 | Injection moulded window-type cage of glass fibre reinforced polyamide 66, roller centred |
| U. | U combined with a one-figure number identifies reduced total width tolerance. |
| Examples: | |
| U2 Total width tolerance +0,05/0 mm | |
| U4 Total width tolerance +0,10/0 mm | |
| VA321 | Optimized internal design |
| VA606 | Crowned raceway on bearing rings and special heat treatment |
| VA607 | Crowned raceway on bearing rings and special heat treatment |
| VB022 | Chamfer dimension at large outer ring face 0,3 mm |
| VB026 | Chamfer dimension at large inner ring side face 3 mm |
| VB061 | Chamfer dimension at large inner ring side face 8 mm |
| VB134 | Chamfer dimension at large inner ring side face 1 mm |
| VB406 | Chamfer dimension at large inner ring side face 3 mm and at large outer ring side face 2 mm |
| VB481 | Chamfer dimension at large inner ring side face 8,5 mm |
| VC027 | Modified internal geometry for increased permissible misalignment |
| VC068 | Increased running accuracy and special heat treatment |
| VE174 | One locating slot in outer ring at large outer ring side face, increased running accuracy |
| VQ051 | Modified internal geometry for increased permissible misalignment |
| VQ267 | Reduced inner ring width tolerance, ± 0,025 mm |
| VQ495 | As CL7C but with reduced or displaced tolerance for the outside diameter |
| VQ506 | Reduced inner ring width tolerance |
| VQ507 | As CL7C but with reduced or displaced tolerance for the outside diameter |
| VQ523 | As CL7C but with reduced inner ring width tolerance and reduced or displaced tolerance for the outside diameter |
| VQ601 | Accuracy to ABMA tolerance class 0 for inch bearings |
| W | Modified ring width tolerance, +0,05/0 mm |
| X | Boundary dimensions changed to conform to ISO |
| DB | Matched bearing pair arranged back-to-back. A figure combination immediately following the DB identifies the design of the intermediate rings |
| DF | Matched bearing pair arranged face-to-face. A figure combination immediately following the DF identifies the design of the intermediate ring |
| DT | Matched bearing pair arranged in tandem. A figure combination immediately following the DT identifies the design of the intermediate rings |
| VA901 | fluoro rubber (FKM) seals at both sides, sealing ring between inner rings, can be relubricated via outer ring |
| VA902 | fluoro rubber (FKM) seals at both sides, sealing ring between inner rings, cannot be relubricated |
| VA903 | as VA901 but without sealing ring between inner rings |
| VA919 | fluoro rubber (FKM) seals at both sides, can be relubricated via outer ring, inner rings without lubrication grooves in side faces, but with annular groove in bore and lubrication holes through guide flange |
| VA941 | fluoro rubber (FKM) seals at both sides, cannot be relubricated via outer ring, inner ring with lubrication grooves in inboard side faces and annular groove and lubrication holes at outboard side between inner rings |
| SKF spherical roller thrust bearings Code | |
| E | Optimized internal design and pressed window-type steel cage |
| EF | Optimized internal design and machined steel cage |
| EM | Optimized internal design and machined brass cage |
| N1 | One locating slot in the housing washer |
| N2 | Two locating slots 180° apart in the housing washer |
| VE447 | Shaft washer with three equally spaced threaded holes in one side face to take hoisting tackle |
| VE447E | Shaft washer with three equally spaced threaded holes in one side face to take hoisting tackle and three appropriate eye bolts |
| VE632 | Housing washer with three equally spaced threaded holes in one side face to take hoisting tackle |
| SKF self-aligning ball bearings Code | |
| C3 | Radial internal clearance greater than Normal |
| E | Optimized internal design |
| K | Tapered bore, taper 1:12 |
| M | Machined brass cage, ball centred |
| 2RS1 | Sheet steel reinforced contact seal of acrylonitrile-butadiene rubber (NBR) on both sides of the bearing |
| TN | Injection moulded snap-type cage of polyamide 66, ball centred |
| TN9 | Injection moulded snap-type cage of glass fibre reinforced polyamide 66, ball centred |
| VE294 | Annular groove and six lubrication holes in the inner ring |
| SKF spherical roller bearings Code | |
| C2 | Radial internal clearance smaller than Normal |
| C3 | Radial internal clearance greater than Normal |
| C4 | Radial internal clearance greater than C3 |
| C5 | Radial internal clearance greater than C4 |
| C08 | Heightened running accuracy to ISO tolerance class 5 |
| C083 | C08 + C3 |
| C084 | C08 + C4 |
| 2CS | Sheet steel reinforced contact seal of acrylonitrile-butadiene rubber (NBR) on both sides of the bearing. Annular groove and three lubrication holes in the outer ring covered with a polymer band. |
| 2CS2 | Sheet steel reinforced contact seal of fluoro rubber (FKM) on both sides of the bearing. Annular groove and three lubrication holes in the outer ring; covered with a polymer band. Lubricated with a polyurea high-temperature grease |
| 2CS5 | Sheet steel reinforced contact seal of hydrogenated acrylonitrile-butadiene rubber (HNBR) on both sides of the bearing. Otherwise as 2CS2 |
| HA3 | Case-hardened inner ring |
| K | Tapered bore, taper 1:12 |
| K30 | Tapered bore, taper 1:30 |
| P5 | Dimensional and running accuracy to ISO tolerance class 5 |
| P6 | Dimensional and running accuracy to ISO tolerance class 6 |
| P62 | P6 + C2 |
| VA405 | Bearings for vibratory applications with surface hardened cages |
| VA406 | VA405 and PTFE-coated bore |
| VE552(E) | Outer ring with three equally spaced threaded holes in one side face to accommodate hoisting tackle; the E indicates that appropriate eye bolts are supplied with the bearings |
| VE553(E) | As VE552 but with threaded holes in both side faces |
| VG114 | Surface hardened pressed steel cage |
| VQ424 | Running accuracy better than C08 |
| W | Without annular groove and lubrication holes in outer ring |
| W20 | Three lubrication holes in outer ring |
| W26 | Six lubrication holes in inner ring |
| W33 | Annular groove and three lubrication holes in outer ring |
| W64 | Solid Oil filling |
| W77 | Plugged W33 lubrication holes |
| W513 | W26 + W33 |
| 235220 | Case-hardened inner ring with helical groove in bore |
| SKF thrust ball bearings Code | |
| F | Machined steel cage, ball centred |
| JR | Cage comprising two flat pressed steel washers, ball centred |
| M | Machined brass cage, ball centred |
| P5 | Increased dimensional and running accuracy to ISO tolerance class 5 |
| P6 | Increased dimensional and running accuracy to ISO tolerance class 6 |
| TN9 | Injection moulded cage of glass fibre reinforced polyamide 66, ball centred |
| SKF cylindrical roller thrust bearings Code | |
| HB1 | Bainite hardened shaft and housing washers |
| M | cage, roller centred |
| P5 | Increased dimensional and running accuracy to ISO tolerance class 5 |
| TN | Injection moulded cage of polyamide 66, roller centred |
| SKF full complement cylindrical roller bearings Code | |
| CV | Modified internal design, full complement roller set |
| C3 | Radial internal clearance greater than Normal |
| E | Reinforced roller complement |
| HA1 | Case-hardened inner and outer rings |
| HB1 | Bainite hardened inner and outer rings |
| L4B | Bearing rings and rolling elements with special surface coating |
| L5B | Rolling elements with special surface coating |
| V | Full complement of rollers (without cage) |
| VH | Full complement of rollers (without cage), self-retaining |
| SKF single row cylindrical roller bearings Code | |
| B20 | Reduced width tolerance |
| CN | Normal radial internal clearance; normally only used together with an additional letter that identifies a reduced or displaced clearance range |
| F:Reduced and displaced clearance range covering the uppermost quarter of the actual clearance plus the the lowest quarter of the next greater clearance range. | |
| H:Reduced clearance range corresponding to the upper half of the actual clearance range | |
| L:Reduced clearance range corresponding to the lower half of the actual clearance range | |
| M:Reduced clearance range corresponding to the two middle quarters of the actual clearance range | |
| R:Reduced clearance range corresponding to "paired rings" specified in ISO 5753:1981. | |
| The above letters are also used together with the clearance class suffixes C2, C3, C4 and C5 | |
| C2 | Radial internal clearance less than Normal |
| C3 | Radial internal clearance greater than Normal |
| C4 | Radial internal clearance greater than C3 |
| C5 | Radial internal clearance greater than C4 |
| D | Modified internal design |
| EC | Optimized internal design incorporating more and/or larger rollers and with modified roller/end flange contact |
| HA3 | Case-hardened inner ring |
| HB1 | Bainite hardened inner and outer rings |
| HN1 | Inner and outer rings with special surface heat treatment |
| J | Pressed steel cage, roller centred, unhardened |
| K | Tapered bore, taper 1:12 |
| M | Two-piece machined brass cage, roller centred |
| MA | Two-piece machined brass cage, outer ring centred |
| MAS | As MA but with lubrication grooves in the guiding surfaces |
| MB | Two-piece machined brass cage, inner ring guided |
| MBS | As MB but with lubrication grooves in the guiding surfaces |
| ML | One-piece form-turned window-type brass cage, inner or outer ring centred |
| MP | One-piece window-type brass cage with milled, reamed or broached pockets, inner or outer ring centred |
| MPS | As MP but with lubrication grooves in the guiding surfaces |
| MR | One-piece form-turned window-type brass cage, roller centred |
| N | Snap ring groove in the outer ring |
| NR | Snap ring groove in the outer ring, with appropriate snap ring |
| N1 | One locating slot (notch) in one outer ring side face |
| N2 | Two locating slots 180° apart in one outer ring side face |
| P | Injection moulded cage of glass fibre reinforced polyamide 66, roller centred |
| PH | Injection moulded cage of glass fibre reinforced polyetheretherketone (PEEK), roller centred |
| PHA | Injection moulded cage of glass fibre reinforced polyetheretherketone (PEEK), outer ring centred |
| P5 | Dimensional and running accuracy to ISO tolerance class 5 |
| P6 | Dimensional and running accuracy to ISO tolerance class 6 |
| S1 | Bearing rings dimensionally stabilized for operating temperatures up to +200 °C |
| S2 | Bearing rings dimensionally stabilized for operating temperatures up to +250 °C |
| TN9 | Injection moulded cage of glass fibre reinforced polyamide 66 |
| VA301 | Bearing for railway vehicle traction motors |
| VA305 | VA301 + special inspection routines |
| VA350 | Bearing for railway axleboxes |
| VA380 | Bearing for railway axleboxes according to EN 12080:1998, class 1 |
| VA3091 | VA301 + VL0241 |
| VC025 | Bearing with specially wear-resistant raceways for applications in heavily contaminated environments |
| VL0241 | Aluminium oxide coated outside surface of the outer ring for electrical resistance up to 1 000 V DC |
| VL2071 | Aluminium oxide coated outside surface of the inner ring for electrical resistance up to 1 000 V DC |
| VQ015 | Inner ring with crowned raceway for increased permissible misalignment |
| SKF double row cylindrical roller bearings Code | |
| B | Present standard design with brass cage of double pronged type |
| BK | B + K |
| CN | Normal radial internal clearance; generally only used in combination with one of the following letters which indicate reduced or displaced clearance range |
| The above letters are also used together with the following clearance classes: C2, C3, C4 and C5 | |
| C1 | Radial internal clearance smaller than C2 |
| C2 | Radial internal clearance smaller than Normal |
| C3 | Radial internal clearance greater than Normal |
| C4 | Radial internal clearance greater than C3 |
| C5 | Radial internal clearance greater than C4 |
| F | Roller-centred machined steel cage of double pronged type |
| FA | Outer ring centred machined steel cage of double pronged type |
| FB | Inner ring centred machined steel cage of double pronged type |
| HA1 | Case hardened inner and outer rings |
| HA2 | Case hardened outer ring |
| HA4 | Case hardened rollers, inner and outer rings |
| HB1 | Bainite hardened inner and outer rings |
| HB2 | Bainite hardened outer ring |
| HB3 | Bainite hardened inner ring |
| K | Tapered bore, taper 1:12 |
| KTN9 | K + TN9 |
| K30 | Tapered bore, taper 1:30 |
| M | Machined brass cage, centred on rolling elements |
| P4 | Dimensional and running accuracy to ISO tolerance class 4 (better than P5) |
| P5 | Dimensional and running accuracy to ISO tolerance class 5 (better than P6) |
| P6 | Dimensional and running accuracy to ISO tolerance class 6 (better than Normal) |
| SP | Special precision class for machine tool bearings; dimensional accuracy approximately to P5, running accuracy approximately to P4 |
| SPCN | SP + CN |
| SPC2 | SP + C2 |
| TN9 | Moulded cage of glass fibre reinforced polyamide 66 |
| UP | Ultra precision class for machine tool bearings; dimensional accuracy approximately to P4, running accuracy better than P4 |
| VE900 | Preliminary standard design |
| W33 | Annular groove and three lubrication holes in outer ring |
| W33X | Annular groove and six lubrication holes in outer ring |
| SKF multi-row cylindrical roller bearings Code | |
| A, B, C, D, E | Modifications to the original design. Combinations of these letters are also used, e.g. DC. The actual modification is specific to the individual bearing and is given on the drawing. |
| C2 | Radial internal clearance smaller than Normal |
| C3 | Radial internal clearance greater than Normal |
| C4 | Radial internal clearance greater than C3 |
| HA1 | Inner and outer rings of case-hardened steel |
| HA2 | Outer ring of case-hardened steel |
| HA3 | Inner ring of case-hardened steel |
| HA4 | Inner and outer rings and rollers of case-hardened steel |
| HB1 | Bainite hardened inner and outer rings |
| HB2 | Bainite hardened outer ring |
| HB3 | Bainite hardened inner ring |
| K | Tapered bore, taper 1:12 |
| K30 | Tapered bore, taper 1:30 |
| M | Machined brass cage |
| P5 | Dimensional and running accuracy to ISO tolerance class 5 (better than P6) |
| P6 | Dimensional and running accuracy to ISO tolerance class 6 (better than Normal) |
| VJ202 | Bearing set of double row bearings |
| W33 | Annular groove and three lubrication holes in outer ring |
These are the SKF bearing code, more bearing the brand code, please search our blog